It does sound really nice. Can't wait to hear more details. I did the same 30 years ago in my Kitfox 4 with an NSI Subaru. Not as powerful at 98 HP but still flying today!
Awesome set up, sounds great. I’m trying to find info on that engine for firing order and crank position sensor angle index . Do you have any idea what they are? None of my engine books provide any of that info.
It’s a good option in my opinion. As for the tuning side of things, I left that up to the brains at Hypersports USA. They have been tuning these engines for years and I felt I’d leave that up to the experts. Thanks for watching👍
I'm an A&P mechanic. I also used to operate R/C boats & planes. My friend had an rc electric buggy with a 3 speed transmission. He put the 3 speed transmission in front of a powerful brushless electric motor in a plane. People said it would not work because of mach tip speed. I told them turbine blades are basically propellers with a shroud around them. We eventually used the same kind of rc buggy 3 speed transmission behind a small nitro engine in a boat. It the long straight away it would shift all the way into 3rd gear. They say in boats, if you spin a boat propeller to fast it causes cavitation, which might be true. My whole argument with using transmissions in planes & boats, is you can fly your plane at top speed while only using 1/2-3/4 the throttle= lower engine rpm. I would like to say it would be wise to use a heavy duty transmission, along with a high torque gasoline engine or better yet a diesel engine, so not to over torque the engine or transmission. They say a variable pitch prop is the same as having a multi speed transmission, but it's not. All a variable pitch prop does is increase or decrease the thrust produced, by the propeller. With a multi forward speed transmission you can lower your engine rpm & fuel consumption while while doing the same speed as a plane without a transmission. I really & truly think the government tells us these things, because with multiple forward speed transmissions on piston driven planes & boats, we could go much further distances because of the lower fuel consumption at faster speeds. Even huge turbo fan airliners have developed a two speed gearbox in the turbine motor to slow the turbine compressor down, while letting the fan section turn much faster for fuel efficiency.
Interesting and I would agree. This motor would be great and there is another pilot using a Kawasaki JetSki engine with a Supercharger plus some nitrous for competitions and he's getting 400hp! I have a JetSki and know I rag the hell out of that engine during the summer for 8 hours on end just wide-open throttle and it's never broken in 5 years!
I don't know if it's due to the current RPM, exhaust, 3 vs 4 cylinders or what, but this 998T seems to sound a lot nicer than the Apex conversions. She's coming along great! Nice work.
If you posted any video detailing your design philosophy or construction process for the composite radiator air duct, I missed it. Am going to look back for it now. It looks fantastic in form, function and aesthetics!
Still playing with pitch settings but I’m currently getting about 2300 prop rpm and 530ish lbs on the crane scale.. still a bit slow so I’m sure there is more in it
What boost level is it running at? What’s the mechanical noise in the video at idle? Is it the redrive gears? Is the redrive straight cut gears? (Loud, typically compared to helical but also stronger than helical I believe.). Love the sound of the triple!
I do have different gear ratios to play with. In general though, the largest prop you have clearance for will handle the most power with the fewest blades.
Thanks! I’ll test all three that are available for this specific gearbox. The current set is 3.45:1 and it’s the middle ratio. There is one faster and one slower but I don’t remember exactly what they are at the moment. Stay tuned🤷🏻♂️
Those engines do not age very well… we have a 172 with a diesel conversion, and ohh god that thing is in the shop more than our 150!! And that’s cause our 150 cranks out double the hours the 172 does. But I’ll tell you the 172 burns waaaay less fuel than the 150.
Those engines do not age very well… we have a 172 with a diesel conversion, and ohh god that thing is in the shop more than our 150!! And that’s cause our 150 cranks out double the hours the 172 does. But I’ll tell you the 172 burns waaaay less fuel than the 150.
Awesome milestone! Must have felt amazing!
For sure!
Man...I can't wait to see that plane fly. Once it's off idle, that engine sounds fantastic.
Agreed! Naturally it’s got some gear chatter at idle, but that’s just part of having a geared setup👍
Blew all the grass off the land behind the plane. Sounds amazing and that air inlet turned out great.
Thanks doc!
It does sound really nice. Can't wait to hear more details. I did the same 30 years ago in my Kitfox 4 with an NSI Subaru. Not as powerful at 98 HP but still flying today!
Sounds like fun! Thanks for watching.
Awesome set up, sounds great. I’m trying to find info on that engine for firing order and crank position sensor angle index . Do you have any idea what they are? None of my engine books provide any of that info.
It’s a good option in my opinion. As for the tuning side of things, I left that up to the brains at Hypersports USA. They have been tuning these engines for years and I felt I’d leave that up to the experts. Thanks for watching👍
The engine sounds so strong. You're going for a ride!
Titan Killer in the making here I think🤞
Wow, sounds fantastic!
I'm an A&P mechanic. I also used to operate R/C boats & planes. My friend had an rc electric buggy with a 3 speed transmission. He put the 3 speed transmission in front of a powerful brushless electric motor in a plane. People said it would not work because of mach tip speed. I told them turbine blades are basically propellers with a shroud around them. We eventually used the same kind of rc buggy 3 speed transmission behind a small nitro engine in a boat. It the long straight away it would shift all the way into 3rd gear. They say in boats, if you spin a boat propeller to fast it causes cavitation, which might be true. My whole argument with using transmissions in planes & boats, is you can fly your plane at top speed while only using 1/2-3/4 the throttle= lower engine rpm. I would like to say it would be wise to use a heavy duty transmission, along with a high torque gasoline engine or better yet a diesel engine, so not to over torque the engine or transmission. They say a variable pitch prop is the same as having a multi speed transmission, but it's not. All a variable pitch prop does is increase or decrease the thrust produced, by the propeller. With a multi forward speed transmission you can lower your engine rpm & fuel consumption while while doing the same speed as a plane without a transmission. I really & truly think the government tells us these things, because with multiple forward speed transmissions on piston driven planes & boats, we could go much further distances because of the lower fuel consumption at faster speeds. Even huge turbo fan airliners have developed a two speed gearbox in the turbine motor to slow the turbine compressor down, while letting the fan section turn much faster for fuel efficiency.
Interesting and I would agree. This motor would be great and there is another pilot using a Kawasaki JetSki engine with a Supercharger plus some nitrous for competitions and he's getting 400hp! I have a JetSki and know I rag the hell out of that engine during the summer for 8 hours on end just wide-open throttle and it's never broken in 5 years!
Very impressive and inspiring!
Thanks!
his voice is distinctive.. it's nice to see it, don't forget if the push test is posted too️😀
Engine sounds great happy to see the build progressing
I don't know if it's due to the current RPM, exhaust, 3 vs 4 cylinders or what, but this 998T seems to sound a lot nicer than the Apex conversions.
She's coming along great! Nice work.
Man that engine sounds good.
It’s unique sounding for sure!
Sounds Great!!! Engine,,, Check!!!
Thanks Paul!
Great video,
Thank you...
Thanks!
Wow! I love your scientific method and sure do appreciate you sharing with us. Eagerly watching and cheering you on, brother.
Awesome! That spool down after shutdown is interesting. I was expecting a stop like a Rotax 🙂
It is pretty wild! That sprang clutch lets it spool down nice and easy👍
If you posted any video detailing your design philosophy or construction process for the composite radiator air duct, I missed it. Am going to look back for it now. It looks fantastic in form, function and aesthetics!
No I didn’t film that, but I do plan to film the cowl build and I plan to do that the same way. Thanks for watching👍
That gearbox definitely is talkative at idle!
It’s got a distinct sound for sure👍
Man that thing sounds fantastic! I'd love to know what RPM you're turning and static thrust you're seeing. Beautiful build!
Still playing with pitch settings but I’m currently getting about 2300 prop rpm and 530ish lbs on the crane scale.. still a bit slow so I’m sure there is more in it
Awesome!!! What was the thrust?
Thanks! Right now I’m seeing around 530lbs, but i think there is more in it. This isn’t the preferred gear ratio for this prop. More to come👍
You've got some balls of steel trusting just that strap to hold you down. 😆
Not gonna lie, the first few times was with a high pucker factor…lol
@@Project2Aero 😆😆😂 i can only imagine.
@@Project2Aero I was more worried about up rooting the tree. 😄
Congrats, great looking set-up.
Thanks!
I like the 6-bladed prop best. ;-)
Totally agree👍
great progress! Is the scoop for the intercooler just temp. for ground runs?
Yes, that one is just temporary. Building the cowl soon
As Troy Landry would say, it's a tree shaker.😉😆🤣
Sounds great :)
Thanks mark!
What boost level is it running at? What’s the mechanical noise in the video at idle? Is it the redrive gears? Is the redrive straight cut gears? (Loud, typically compared to helical but also stronger than helical I believe.). Love the sound of the triple!
It’s at stock boost levels currently. The noise is the reduction drive and yes it’s straight cut gears👍
Looks like a murphy rebel
that temporary windshield does give it a rebel vibe!
thats cool!!
Thanks man!
Going to pull the tree over.
Awesome! What prop is that and where did you get it? Thanks
I’m running a ground adjustable sterna. I ordered from them direct. I’m anxious to see what the performance numbers will be once it’s flying🤞
@@Project2Aero Cool thanks! Thanks for the videos!
Hello, may I know why you don't reduce the size of the propeller by putting an extra large gear on the engine?
I do have different gear ratios to play with. In general though, the largest prop you have clearance for will handle the most power with the fewest blades.
What kind of fuel are you using?
91 mogas
I’m looking for an 85 hp engine. Could this engine produce that with a sensible RPM and non turbo?
Take a look at the phazer setup. Skytrax offers a box for it and it’s a 2 cylinder non-turbo. Probably more along the lines of what your wanting
Very clean build!
What different gear ratios are you testing?
Thanks! I’ll test all three that are available for this specific gearbox. The current set is 3.45:1 and it’s the middle ratio. There is one faster and one slower but I don’t remember exactly what they are at the moment. Stay tuned🤷🏻♂️
@@Project2Aero in the sleds we regularly spin them to 8800 rpm’s. My current Sidewinder eclipses 320-340 bhp.
@@gotjuice7160 stout!
@@Project2Aero I can’t even hang onto it at wide open throttle. There are some limited vids on my channel.
@@gotjuice7160 when you gotta strap yourself to it, then you got enough power.. lol. I’ll go check it out👍
If you need a fuel cell i have one that is sfi certified for sale
I’ve got the real fuel tanks for this plane. I’m just waiting to put them in until later since it’s all coming back out again.
what model engine?
This is a Yamaha sidewinder 998Turbo snowmobile engine
@@Project2Aero price it?
@@rawandgaming7113 I expect to have about 14k into my firewall forward including the skytrax reduction drive and Hypersports ECU
@@Project2Aero very good
Those engines do not age very well… we have a 172 with a diesel conversion, and ohh god that thing is in the shop more than our 150!! And that’s cause our 150 cranks out double the hours the 172 does. But I’ll tell you the 172 burns waaaay less fuel than the 150.
Time will tell how this setup will age. Not sure it’s fair to compare it to a diesel conversion though. Yamaha engines typically last a good while👍
Those engines do not age very well… we have a 172 with a diesel conversion, and ohh god that thing is in the shop more than our 150!! And that’s cause our 150 cranks out double the hours the 172 does. But I’ll tell you the 172 burns waaaay less fuel than the 150.