Those props are out of the water and if the hull leans to one side then one side is going to be totally out of the water while the other side is getting more drive which is why it turns back. Think about it. If you turn right the hull leans right. The left prop comes out of the water and the right digs in and swerves it left. Trust me on this. I won a lot of IMPBA and NAMBA races.
You are 100% correct! I work on the 3 fastest V bottom boat in the world. Was the 2nd but that’s not why I’m here. B, boats steer with the props. Right…! Go look up steering a bout with dual drives. Your boat needs the CG back more to put the bow up and that will put the drives/props more in the water.
I have a smaller deep V doing the same thing! I added trim tabs and that helped, but really the issue is that the props come out of the water as soon as it leans a little. Got to run the props deeper so that they are always both in the water.
B, this is by far the most interesting video/ project of urs for me to date. It's the journey that will keep me coming back to see progress on this project!
I have a 50” gas mono that did that same thing running to wet. I know it was said above but it looks to me like when it planes out the front of the boat is pushing down hard into the water causing it to veer. Hopefully you figure it out B 🤙. Looking over the vid again and slow mo some spots where it did it bad, maybe it’s not a cg issue, but maybe a drive angle issue, maybe that big boat wants a slight positive drive angle.
It looks like the shape of the hull is forcing the direction. I wonder is you can change the trim. It seems lo Ike when you accelerate it forces the bow down which directs the travel of the boat. Best of luck. Pretty cool boat.
Just an observation , when you correct the path and the boat starts to bank on one side , one of the prop is going above the water line , so when you try and turn to the right the left prop is above water line thus making the boat turn left because the right prop has more grab , just an observation i may be wrong 😂and also yeah i do also think you need to lift up the front of the boat too 😊 if you can try and level the angle of the prop in a straight line as the bottom of the boat , prop will be higher but as the thrust created by the prop increases , the nose of the boat could rise on high speed ? 😅 enjoy Big B 👌🏻👌🏻👌🏻
That beast got mind of its own looks like it’s going to be a hard bronco to break can’t wait to see it whipped into shape and spanking the water 🔥🔥🔥bg4l😎👍
We are never disappointed in an IRONCLAD/BigB video. 👍👍👍 That boat is just a stubborn booger that’s got to get picked. TTT BGFL and keep those on board camera shots coming too, it’s so cool watching the Xmas trees go buy 😁
favorite boat and I haven't even seen it run until now. lucky number 3. only couple minutes in but I think you need to move the batteries back further for the CG. it's like a jet ski and needs to turn under power. because of that, you definitely need a stronger servo. such a cool boat
Props are definitely blowing out. A mono (deep vee) is inherent to rolling when turning and chine walking on high speed straights. If the boat was to stay level in a turn, like a cat, then the issues that you are having would be manageable. On a duel prop setup on a mono, you will always blow out a prop in the turn. Trim tabs can help, but will not totally eliminate the issues you are having without sacrificing speed due to hull wetting. You can try changing props as well. 2 blades will improve your situation due to less transome lift. Hope this helps.
maybe and I mean maybe I saw what the problem is if you look at minute 12:42 of the video you will see that the right propeller stops before the left one when you turn off the throttle this could mean that more resistance is being opposed to the engine on that side to spin the propeller which will then spin at a lower speed causing the problem we see at minute 15:47
I would try adding some expo before you swap the servo. Maybe add 20-30% expo to "numb" the sticks around neutral so it's not as touchy on the initial turn input. I've had to do this on some of the touchier boats like the recoil to avoid the spin outs. Great to finally see her running though!
Bro that front is digging super hard, I’ll bet everything I own that’s the issue. Gotta pick them drives back up. I’m really suprised you haven’t thought of that.
Do you use expo on your steering to make it less sensitive but you can keep 100% throw? Might help. Another option is mixing steering with throttle to counter act the torque of the props. I think you may be right about needing a serve with more torque. I know you’ll figure it out you always do. That prop video is awesome B
Maybe try to run the cables further inward on the servo horn to improve torque? I don’t think you need that much steering on these… That said, I run the Hitec D845wp on my 1/5 scale and they are bulletproof…
Arnesons are surface drives with props half out of the water Trim tabs are nessasary for stability and help solve your issue go fast boats props usually turn in toward each other and may help with tracking when the outside prop lifts out of the water when turning
My twin gas mono did that too. Try Bigger turnfins . If you run a really big servo ,i would suggest using a separate battery to power it , saves the bec . Some props lift the transom ,some lift the bow.
Definitely move the cables in on the servo arm so as to give more torque, and a positive angle on the Arenson drives, got to get the hull to run drier. Top site though man 👍🏻🇬🇧
Might be worth swapping the props from left to right and reversing motor rotation. I think with the high prop position it might help suck the boat down on the water a bit more and give you some more traction. Current rotation direction looks like it is lifting the transom. Also, when the boat turns right the right prop goes deeper and the left prop comes out of the water making the boat go left again 😅. I’d try to lower the props a little deeper. May not take much.
Maybe test the servo once more with it's own small battery. If the servo holds straight, try see if both props spin the same rpm. One might be a little faster then the other. Tachometer. But I think your idea of 2 stingers and a center rudder is the best. Fix the problem for sure.
Im thinking its the 2 motor set up. The boat leans to the right 22:33 that prop is deeper in the water and throws it to the left. whatever prop is deeper in the water is catching more water
Congrats on getting it to the water park. You have lots of knowledge and the tenacity to figure it out. From what you’re describing it sounds like the servo is next in line for a good looking at. So, it appears it has ‘ torque steer’ of some description ?! Hmmm 🤔 Those big props throwing out a very specific thrust cone might be colliding and causing the servo as you have mentioned to falter. It would be interesting to see those drives have a little bit more distance between them. Perhaps prop down to see if steers better? I wonder if TFL testers when designing this boat could help you ? If anyone should know they should.
After seeing footage of the rear camera (good thing you placed it there) I think I have an idea of what may be happening with the steering: at low speeds it behaves as expected because the boat runs wet and resistance of the hull helps keeping its direction, but with so much power available, my impression is that once the boat develops speed the hull doesn't offer enough resistance and when you turn to one side, the deadrise causes the propeller in that side to submerge and and the other one to go up, which has the effect of a differential steering, pushing the boat in the opposite direction. This is my humble opinion judging from what I saw in the video. I would try lowering the turn fins just in case to see if they can better serve as pivot point.
One I would check your turn phins cuz when that boat leans over that turn fan is angling and biting. Two I would consider getting rid of them and putting on trim tabs. The other thing you could try is rewiring your motors so the props rotate towards each other instead of a way because of way when you go to turn they're going to bite and try to and pull the ass into the boat around. I try having them rotate to the center of the boat line instead of a way that might help
I think you also need to change props and counter rotate the motors. I know you keep saying it’s the servos. I say and feel 100% on the prop and power management I’ll send you a 1/4 scale servo if you give me your address.
I don’t know if I’m explaining this right. With the props out of the water or even in the water when you start to turn it they’re going to act like wheels and if one’s out of the water, in the water more than the other one it’s going to start turn the boat whatever direction of prop is spinning because the boat is very light and the prop is going to want to make the boat crawl left or right.
Big B that boat is a Beast.. being that servo is way too small I run a 70k on my short track 10th scale truck when racing to make sure I don't break it and that trucks putting out half the pressure that giant drive system you're running you can imagine the pressure on their power that that's forcing that servo to try to compensate for 40 k is nothing that poor thing's got to fight that drive system I put 100K on that thing.. and when are you going to shave off the points on those turn fins how many times do you have to be cut, rounding off those turn fins aren't going to slow that boat down.. I put tape around the edges of my boats in case I scrape anything if I had those Christmas trees to deal with I would put giant rubber band or inner tube rubber around my boats so they wouldn't get trashed on those Christmas trees... Thanks for the videos big b.. full trigger full triggerrrrrrr
had a bad servo causing me that years ago, the steering servo would twitch at wot for some reason, im building a mhz 49'' right now and i went with the 1/5 scale servo out the blackjack 42
Expo on steering as a start. Your reactions to correct it show me you need to add some expo. Reducing throw at the servo horn (NOT in the radio until fine tuning) would be good too. You may need a lot in time but you have too much for the moment. Start at the inner holes on the servo on this one and move out as needed for desired steering response.
if you keep needing the fins on the back and they keep causing problems you should try a single fin in the center line of the boat haul about in the first 1/4 of the haul from the rear like dead center in front of the props.
That is a a tinker, tester, tuner's wet dream man. Come on lets be honest the moment we have figured out a boat and pb'd it the fun is over and we tear it down and start over with it or move on to another project. Obviously there are exceptions and sometimes stuff just ends up on the shelf but regardless this has been a very interesting series. But maybe pull one of those drives out and throw two servos on it, on another boat after this, so you can adjust the trim on the fly. Just an idea but keep it up my lakes are freezing over so I'm loving the content.
Can I suggest you remove any drag brake the esc's have in them, your props are stopping completely rather than free wheeling . Basically becoming huge set of brakes. Set the radio up for differential thrust to assist with steerage. Get the hull up out of the water it's running far too wet. Reduce the surface area of the props by going to 2 blade. Also change the direction of rotation to inboard if it's set as outboard.
If the servo does not work, might need a front fin or two, jet boats suck the rear of the boat down, looks like those props lift the back, causing the front to teeter back-and-forth. Great job unbelievable build. I know you will make it right.
As for the servo why not couple twin 40 kg. Or look at the KST all alu ones...... At several times (on a mono) I put a shallow skeg on the hull stretching from the CG to the back, 1/4" deep and maybe 2" long......
“Third Maiden” I believe that could be an oxymoron 🤣. It seams something is not equal, motors are not exactly the same specs-close but off just enough, props are not exactly the same pitch-in the same ball park but off just enough and or there is more resistance in one of the drives, could be one of the ESC’s not set up the same as the other. Having said all that, in the past I have mentioned that servos are always a week point in the system I believe you may be correct Big B, your intuition is un paralleled in the this hobby. I love those rear view videos 👍👍👍 BGFL
Just like the re-re-grand opening of bob's burgers. but if he makes a change each time it is a true maiden voyage for each set up. He should try switching to inner down twin prop setup. His is currently setup for maneuvering at slow speeds like a tugboat. center down will increase stability
Servo on a dedicated batteryy, Youll never get it right until each ESC sees exact same voltage , and turning one motor backwards, usually yields different numbers on a bench, only thing with that is it would consistently turn one way, but with the opposite prop out of the water counter acting that, I could see it veering either way, so bigger servo, on a dedicated battery for sure.
Man that's a big boat! Looks like a bull trying to swim in a mud puddle lol. Have u tried holding the boat in the water and hit the trigger to see if the servo is glitching under load? Also maybe drip those turn fins down??? I have no doubt you'll gonna figure it out tho. It definitely seems to handle like a jet boat. Maybe get the jet stream out and practice with that lol. Boat sounds freaking good tho!
I would try the following, Big boy servo, Toe inn 2 blade props Smaller props, Even if u put some small props on as a test like 45 mm 2 blades and toe in 2-5 degrees
Interesting Big B I run a Stall Torque (8.4V): 28 kg/cm (389 oz/in) servo in my 60 inch Oxidean mono dual moter 800kv x2 with ZTW 300 ESC x 2 12 s with 65mm props and no problem with the servo, , mind you I not running the same out drives you are, maybe Bill can send the same servo that I’m running ? To try it. It will take some time but you will get it figured out👍
Bigg B the part of the video when you said you were staring right and it went left or whatever the rooster tail on the right hand prop was way bigger than the one on the left
Steering servo arm connecting points are at extreme ends, that's highest leveraging point, there's 2 other points onward, the middle point would work better,
Beast of a boat that is , Since I put flycolor 90 esc in my ft011 the servo is making a cracking noise its not hot or nothing is it possible there's to much power going to it ? Nice video and what a wicked boat. 👍
whats happening here is when the boat starts leaning to one side or another, for whatever reason, the inside or low side surface drive starts getting more traction than the other side and sense both drives are turning at the same RPM the boat is going to make a hard turn. Your problem lays with the boat, not the drive alignment however, they should be toed slightly in, very slightly. Trim your surface drives back up and install trim tabs on the boat. When you adjust your surface drives, you want the center of your props parallel with the keel, use a ruler or a straight edge, too deep and the props become coefficient drag, too shallow and the props wont get traction
Also, there is very little surface area to deflect water flow when steering, compared with a rudder. Plus, the prop wash is not hittiing a rudder. Probably will need to get used to it.Try longer find maybe. Maybe trim tabs?
Id say its just ment to be a high speed boat. Im sure alignment of the struts are extremely important, but without a rudder, slow handling is poor. We'll see once you get to really open it up! Up the BeC/ servo voltage!
it looks like too much of the hull is in the water under power. Try trimming the drives up to get the bow up. It will help the twitchy-ness if less of the chines are grabbing the water. Yea its got props on the end of sticks, the further away they are from the transom the more leverage they make. If u need to steer without power you need a rudder or outboards.
Very cool setup and camera footage but I think these drives are too big for this hull. With a traditional rudder design the prop is always pushing through the keel. When these props turn, you’re creating a moment arm from the prop push angle and it’s pushing the boat out of the turn. Servo looks dinky too. I agree!!
First two things I would do, change servo. And I believe you have too much slack in the steering cables. Is there not a way to run those with a hard shaft?
All boats have to be under power to turn unless your running a big rudder. Yours look big but I think they need to be deeper to keep turning. Its weird the way it ghost steers.. Do people run keels on those cause maybe a little weight in the center could make it more stable. Maybe get smaller props cause they are really close. If it was an airplane You would point the props outward away from each other. I wish ya well and hope ya figure it out soon
Could be the servo twiching under a load .I've seen it happen. Maybe your motors are putting out way more torque than the servo can hold . Is the servo getting warm .
I am curious for shits and giggles what would happen if we went in board rotation with the props. Instead of going out board. Servo can cause some issues. My 48 inch mono I’m running 60 kg servo I believe.
Ok. I have a suggestion. Take a look at the servo drive cables. Is there a way to take some … most? … of the bend out? To me, it looks like that bend is too severe.
![SAFEPLANET - ดาวเคราะห์ [ THE PLANET ]](http://i.ytimg.com/vi/4X1XL3I_k3c/mqdefault.jpg)
Those props are out of the water and if the hull leans to one side then one side is going to be totally out of the water while the other side is getting more drive which is why it turns back. Think about it. If you turn right the hull leans right. The left prop comes out of the water and the right digs in and swerves it left. Trust me on this. I won a lot of IMPBA and NAMBA races.
I was thinking the same thing
You are 100% correct!
I work on the 3 fastest V bottom boat in the world. Was the 2nd but that’s not why I’m here.
B, boats steer with the props. Right…! Go look up steering a bout with dual drives.
Your boat needs the CG back more to put the bow up and that will put the drives/props more in the water.
You can clearly see only 3/4 of prop in water even when going straight
You can see the water flow around the outside prop reduce
surface props, they run best when 70% of the prop is out the water! Trust me they are designed this way
I have a smaller deep V doing the same thing! I added trim tabs and that helped, but really the issue is that the props come out of the water as soon as it leans a little. Got to run the props deeper so that they are always both in the water.
B, this is by far the most interesting video/ project of urs for me to date. It's the journey that will keep me coming back to see progress on this project!
That’s what I love about the Hobby test and tune, test and tune, test and tune.
I have a 50” gas mono that did that same thing running to wet. I know it was said above but it looks to me like when it planes out the front of the boat is pushing down hard into the water causing it to veer. Hopefully you figure it out B 🤙. Looking over the vid again and slow mo some spots where it did it bad, maybe it’s not a cg issue, but maybe a drive angle issue, maybe that big boat wants a slight positive drive angle.
I was going to say the same thing.
Almost like the drive angle is offsetting the COG.
It looks like the shape of the hull is forcing the direction. I wonder is you can change the trim. It seems lo
Ike when you accelerate it forces the bow down which directs the travel of the boat. Best of luck. Pretty cool boat.
cool go pro footage on the maiden maiden maiden maiden voyage!
I love rc, never got into boats. But this is cool as heck. Makes me wanna “dip my toes “ into the boat side of things .
Just an observation , when you correct the path and the boat starts to bank on one side , one of the prop is going above the water line , so when you try and turn to the right the left prop is above water line thus making the boat turn left because the right prop has more grab , just an observation i may be wrong 😂and also yeah i do also think you need to lift up the front of the boat too 😊 if you can try and level the angle of the prop in a straight line as the bottom of the boat , prop will be higher but as the thrust created by the prop increases , the nose of the boat could rise on high speed ?
😅 enjoy Big B 👌🏻👌🏻👌🏻
Wow! That rooster tails as long as the park pond!
Sooo badass!💯🔥💯🔥💯🔥
What an animal , such a nice boat with unbelievable power . Very cool my dude !
Hell yea looks great brother glade to see it back on the water
That beast got mind of its own looks like it’s going to be a hard bronco to break can’t wait to see it whipped into shape and spanking the water 🔥🔥🔥bg4l😎👍
Thats wild. Shes gonna be a beast once you get it figured out.
We are never disappointed in an IRONCLAD/BigB video. 👍👍👍
That boat is just a stubborn booger that’s got to get picked. TTT BGFL
and keep those on board camera shots coming too, it’s so cool watching the Xmas trees go buy 😁
favorite boat and I haven't even seen it run until now. lucky number 3. only couple minutes in but I think you need to move the batteries back further for the CG. it's like a jet ski and needs to turn under power. because of that, you definitely need a stronger servo.
such a cool boat
This build is WILD. Love it
Props are definitely blowing out. A mono (deep vee) is inherent to rolling when turning and chine walking on high speed straights. If the boat was to stay level in a turn, like a cat, then the issues that you are having would be manageable. On a duel prop setup on a mono, you will always blow out a prop in the turn. Trim tabs can help, but will not totally eliminate the issues you are having without sacrificing speed due to hull wetting. You can try changing props as well. 2 blades will improve your situation due to less transome lift. Hope this helps.
maybe and I mean maybe I saw what the problem is if you look at minute 12:42 of the video you will see that the right propeller stops before the left one when you turn off the throttle this could mean that more resistance is being opposed to the engine on that side to spin the propeller which will then spin at a lower speed causing the problem we see at minute 15:47
I would try adding some expo before you swap the servo. Maybe add 20-30% expo to "numb" the sticks around neutral so it's not as touchy on the initial turn input. I've had to do this on some of the touchier boats like the recoil to avoid the spin outs. Great to finally see her running though!
@@VetteWay2Fast my Zonda was doing that initially and I trimmed down the servo. But that being sad it’s a totally different animal than the Ariane.
Bro that front is digging super hard, I’ll bet everything I own that’s the issue. Gotta pick them drives back up. I’m really suprised you haven’t thought of that.
I ran the drives neutral my first run, it didn't steer what so ever, literally no rudder/skeg in the water when there level!
@ I wouldn’t say run them level but it looks like you have them way down
Big B , upgrade that servo . Put in the best of the best of everything as you have . 👏👏
Do you use expo on your steering to make it less sensitive but you can keep 100% throw? Might help. Another option is mixing steering with throttle to counter act the torque of the props. I think you may be right about needing a serve with more torque. I know you’ll figure it out you always do. That prop video is awesome B
Maybe try to run the cables further inward on the servo horn to improve torque? I don’t think you need that much steering on these… That said, I run the Hitec D845wp on my 1/5 scale and they are bulletproof…
Bro this boat is wild
Lmao! That turn fin IS death!💯😆
Arnesons are surface drives with props half out of the water
Trim tabs are nessasary for stability and help solve your issue
go fast boats props usually turn in toward each other and may help with tracking when the outside prop lifts out of the water when turning
My twin gas mono did that too. Try Bigger turnfins . If you run a really big servo ,i would suggest using a separate battery to power it , saves the bec . Some props lift the transom ,some lift the bow.
What about changing prop rotation? No money involved just a little time
Definitely move the cables in on the servo arm so as to give more torque, and a positive angle on the Arenson drives, got to get the hull to run drier. Top site though man 👍🏻🇬🇧
Might be worth swapping the props from left to right and reversing motor rotation. I think with the high prop position it might help suck the boat down on the water a bit more and give you some more traction. Current rotation direction looks like it is lifting the transom. Also, when the boat turns right the right prop goes deeper and the left prop comes out of the water making the boat go left again 😅. I’d try to lower the props a little deeper. May not take much.
Maybe test the servo once more with it's own small battery. If the servo holds straight, try see if both props spin the same rpm. One might be a little faster then the other. Tachometer. But I think your idea of 2 stingers and a center rudder is the best. Fix the problem for sure.
Im thinking its the 2 motor set up. The boat leans to the right 22:33 that prop is deeper in the water and throws it to the left. whatever prop is deeper in the water is catching more water
Try rudders turning and not the props that mite help
I agree the props are out of the water when the hull twists and the drive units steer , and not deep enough are the motors in sink?
Running too wet Big B. Raise the outdrive angle so the hull pivots on further back on the keel.
It would be cool to be on a big lake and you be on a boat with somebody driving it and having and driving that full blast
all that work😪 I feel for ya B.
Congrats on getting it to the water park. You have lots of knowledge and the tenacity to figure it out. From what you’re describing it sounds like the servo is next in line for a good looking at.
So, it appears it has
‘ torque steer’ of some description ?! Hmmm 🤔
Those big props throwing out a very specific thrust cone might be colliding and causing the servo as you have mentioned to falter. It would be interesting to see those drives have a little bit more distance between them.
Perhaps prop down to see if steers better? I wonder if TFL testers when designing this boat could help you ? If anyone should know they should.
Looks BADASS though!!!!
After seeing footage of the rear camera (good thing you placed it there) I think I have an idea of what may be happening with the steering: at low speeds it behaves as expected because the boat runs wet and resistance of the hull helps keeping its direction, but with so much power available, my impression is that once the boat develops speed the hull doesn't offer enough resistance and when you turn to one side, the deadrise causes the propeller in that side to submerge and and the other one to go up, which has the effect of a differential steering, pushing the boat in the opposite direction. This is my humble opinion judging from what I saw in the video. I would try lowering the turn fins just in case to see if they can better serve as pivot point.
One I would check your turn phins cuz when that boat leans over that turn fan is angling and biting. Two I would consider getting rid of them and putting on trim tabs. The other thing you could try is rewiring your motors so the props rotate towards each other instead of a way because of way when you go to turn they're going to bite and try to and pull the ass into the boat around. I try having them rotate to the center of the boat line instead of a way that might help
In one to one boats these drives seem to work best on Catamaran style boats.
Do you counter rotating props? Arnesons have to have them.
I think you also need to change props and counter rotate the motors.
I know you keep saying it’s the servos. I say and feel 100% on the prop and power management
I’ll send you a 1/4 scale servo if you give me your address.
The motors are already counter-rotating.
@ yes. But they need to counter rotate opp directions. Left needs to spin clockwise,right side needs to be counter clockwise. Hope this makes sense!
I don’t know if I’m explaining this right. With the props out of the water or even in the water when you start to turn it they’re going to act like wheels and if one’s out of the water, in the water more than the other one it’s going to start turn the boat whatever direction of prop is spinning because the boat is very light and the prop is going to want to make the boat crawl left or right.
Big B that boat is a Beast.. being that servo is way too small I run a 70k on my short track 10th scale truck when racing to make sure I don't break it and that trucks putting out half the pressure that giant drive system you're running you can imagine the pressure on their power that that's forcing that servo to try to compensate for 40 k is nothing that poor thing's got to fight that drive system I put 100K on that thing.. and when are you going to shave off the points on those turn fins how many times do you have to be cut, rounding off those turn fins aren't going to slow that boat down.. I put tape around the edges of my boats in case I scrape anything if I had those Christmas trees to deal with I would put giant rubber band or inner tube rubber around my boats so they wouldn't get trashed on those Christmas trees... Thanks for the videos big b.. full trigger full triggerrrrrrr
had a bad servo causing me that years ago, the steering servo would twitch at wot for some reason, im building a mhz 49'' right now and i went with the 1/5 scale servo out the blackjack 42
Expo on steering as a start. Your reactions to correct it show me you need to add some expo. Reducing throw at the servo horn (NOT in the radio until fine tuning) would be good too. You may need a lot in time but you have too much for the moment. Start at the inner holes on the servo on this one and move out as needed for desired steering response.
You could try moving the wires inward on the servo arm to give it more leverage but it will shorten the steering angle.
if you keep needing the fins on the back and they keep causing problems you should try a single fin in the center line of the boat haul about in the first 1/4 of the haul from the rear like dead center in front of the props.
That is a a tinker, tester, tuner's wet dream man. Come on lets be honest the moment we have figured out a boat and pb'd it the fun is over and we tear it down and start over with it or move on to another project. Obviously there are exceptions and sometimes stuff just ends up on the shelf but regardless this has been a very interesting series. But maybe pull one of those drives out and throw two servos on it, on another boat after this, so you can adjust the trim on the fly. Just an idea but keep it up my lakes are freezing over so I'm loving the content.
When in doubt see what the big boys are running for prop rotation
Can I suggest you remove any drag brake the esc's have in them, your props are stopping completely rather than free wheeling . Basically becoming huge set of brakes. Set the radio up for differential thrust to assist with steerage. Get the hull up out of the water it's running far too wet. Reduce the surface area of the props by going to 2 blade. Also change the direction of rotation to inboard if it's set as outboard.
If the servo does not work, might need a front fin or two, jet boats suck the rear of the boat down, looks like those props lift the back, causing the front to teeter back-and-forth. Great job unbelievable build. I know you will make it right.
Could try changing the prop spin direction? That's crazy for real
Gotta get ya some
Install the Aux wire on your main ESC...I believe it's needed for max wattage to the receiver/servo.
Hi Clad, but could it be that the propellers are not spinning at the same speed? Causing the turn?
As for the servo why not couple twin 40 kg. Or look at the KST all alu ones......
At several times (on a mono) I put a shallow skeg on the hull stretching from
the CG to the back, 1/4" deep and maybe 2" long......
“Third Maiden” I believe that could be an oxymoron 🤣. It seams something is not equal, motors are not exactly the same specs-close but off just enough, props are not exactly the same pitch-in the same ball park but off just enough and or there is more resistance in one of the drives, could be one of the ESC’s not set up the same as the other. Having said all that, in the past I have mentioned that servos are always a week point in the system I believe you may be correct Big B, your intuition is un paralleled in the this hobby.
I love those rear view videos 👍👍👍 BGFL
Just like the re-re-grand opening of bob's burgers. but if he makes a change each time it is a true maiden voyage for each set up. He should try switching to inner down twin prop setup. His is currently setup for maneuvering at slow speeds like a tugboat. center down will increase stability
Don’t give up make them arnesons work
Servo on a dedicated batteryy, Youll never get it right until each ESC sees exact same voltage , and turning one motor backwards, usually yields different numbers on a bench, only thing with that is it would consistently turn one way, but with the opposite prop out of the water counter acting that, I could see it veering either way, so bigger servo, on a dedicated battery for sure.
man even a $300 boat is out of the question for me at the moment , 3k is crazy ... very nice though dude
Man that's a big boat! Looks like a bull trying to swim in a mud puddle lol. Have u tried holding the boat in the water and hit the trigger to see if the servo is glitching under load? Also maybe drip those turn fins down??? I have no doubt you'll gonna figure it out tho. It definitely seems to handle like a jet boat. Maybe get the jet stream out and practice with that lol. Boat sounds freaking good tho!
I would try the following,
Big boy servo,
Toe inn
2 blade props
Smaller props,
Even if u put some small props on as a test like 45 mm 2 blades and toe in 2-5 degrees
Interesting Big B I run a Stall Torque (8.4V): 28 kg/cm (389 oz/in) servo in my 60 inch Oxidean mono dual moter 800kv x2 with ZTW 300 ESC x 2 12 s with 65mm props and no problem with the servo, , mind you I not running the same out drives you are, maybe Bill can send the same servo that I’m running ? To try it. It will take some time but you will get it figured out👍
Can you go over the tune and what you do to tune with the castle system. Also how did you tune two esc’s to work together? Cool build big b!
Bigg B the part of the video when you said you were staring right and it went left or whatever the rooster tail on the right hand prop was way bigger than the one on the left
Steering servo arm connecting points are at extreme ends, that's highest leveraging point, there's 2 other points onward, the middle point would work better,
Beast of a boat that is , Since I put flycolor 90 esc in my ft011 the servo is making a cracking noise its not hot or nothing is it possible there's to much power going to it ? Nice video and what a wicked boat. 👍
Instead of a bigger servo, move the steering points in closer to the centre so you get some more leverage.
whats happening here is when the boat starts leaning to one side or another, for whatever reason, the inside or low side surface drive starts getting more traction than the other side and sense both drives are turning at the same RPM the boat is going to make a hard turn. Your problem lays with the boat, not the drive alignment however, they should be toed slightly in, very slightly. Trim your surface drives back up and install trim tabs on the boat. When you adjust your surface drives, you want the center of your props parallel with the keel, use a ruler or a straight edge, too deep and the props become coefficient drag, too shallow and the props wont get traction
How about 2x40 kg servo’s. 1 pulling whilst the other pushes and vive versa ? Could use a mixer like the huge RC aircraft boys use on big jets !
Man that boat has cut you every time you mess with it!
Have you tried the boat without the turning fin things on the back corners of the boat
Also, there is very little surface area to deflect water flow when steering, compared with a rudder. Plus, the prop wash is not hittiing a rudder. Probably will need to get used to it.Try longer find maybe. Maybe trim tabs?
You need a quarter scale servo on those.
Id say its just ment to be a high speed boat. Im sure alignment of the struts are extremely important, but without a rudder, slow handling is poor. We'll see once you get to really open it up! Up the BeC/ servo voltage!
SINGLE PROP, DUAL MOTOR MOUNT 🤷♂️🤟
it looks like too much of the hull is in the water under power. Try trimming the drives up to get the bow up. It will help the twitchy-ness if less of the chines are grabbing the water. Yea its got props on the end of sticks, the further away they are from the transom the more leverage they make. If u need to steer without power you need a rudder or outboards.
Rc boats with steer able drives are squirrelly. I think when it starts to go off course and you correct it's too much and your chasing it
Very cool setup and camera footage but I think these drives are too big for this hull. With a traditional rudder design the prop is always pushing through the keel. When these props turn, you’re creating a moment arm from the prop push angle and it’s pushing the boat out of the turn. Servo looks dinky too. I agree!!
If the servo doesn't fix it try running a bunch of positive angle on the drives
Maybe try some expo on the throttle it might help at lower speed for turning?
First two things I would do, change servo. And I believe you have too much slack in the steering cables. Is there not a way to run those with a hard shaft?
I think you need more weight aft of CG. I could be wrong but looks like a ton of cavitation
I'm not sure if it's just the camera angle. The right side drive seemed a tad longer than the left. If so, that could cause your issues.
All boats have to be under power to turn unless your running a big rudder. Yours look big but I think they need to be deeper to keep turning. Its weird the way it ghost steers.. Do people run keels on those cause maybe a little weight in the center could make it more stable. Maybe get smaller props cause they are really close. If it was an airplane You would point the props outward away from each other. I wish ya well and hope ya figure it out soon
Could be the servo twiching under a load .I've seen it happen. Maybe your motors are putting out way more torque than the servo can hold . Is the servo getting warm .
The prop wash looks different from 1 side to the other
I am curious for shits and giggles what would happen if we went in board rotation with the props. Instead of going out board.
Servo can cause some issues. My 48 inch mono I’m running 60 kg servo I believe.
Ok. I have a suggestion. Take a look at the servo drive cables. Is there a way to take some … most? … of the bend out? To me, it looks like that bend is too severe.
Need to make sure that the props are counter rotating
i would upgrade the servo and some bigger stable blades to sit deeper in the water
I think you’re turning problems are from the tubes that you have on your push pull system you have for your rudder causing friction maybe
More positive stut angle 🤞
Try a shorter servo horn
Will give a better mechanical advantage
Especially if your not using the full 100% throw 🧐
Gotta get the nose up!Thats a beast but not getting enough lift…
Run the skegs on an offset
Hey,... she can be a "Maiden" ....only once !
Then,... its all downhill from there..🤣🤣🤣
It’s a shallow V bottom run a cat. It’s the only way to go.👍🏻