Goblin 770 Super Low Rpm Experiment
ฝัง
- เผยแพร่เมื่อ 23 ส.ค. 2024
- Today I am trying a new experiment:
Putting a 3bladed tail rotor onto my old 770, flying it with 12s, with 10s and with 6s. Are you curious if it will work?
If you like this video feel free to visit my channel for much more heli flying videos, buildings, tutorial and much more.
Also I invite you to visit my heli blog (also available in english): firstlady1985.jimdo.com
Simone that sure is a Nice Helicopter ! Plus the Low RPM Experiment was Great ! Just Love you' re' Flying also ! GEEEZE its' Great !
thanks dave
hey simone, I found the flight very elegant and quiet, I really liked what I saw. the maneuvers were very precise.
thank you. the 1000rpm flight was...well....very soft in order not to risk a boomstrike or a crash :D but was fun anyways
It was interesting to see you show the changes in flight. I generally prefer the lower end of the rpm scale for rc helis. They look more graceful then (in the right hands of course) - more like a ballet than salsa (nothing against salsa!)
Good experiment
I like the sound when flying 10S at 1000RPM, so real. I can Imagine scaled fuselage on it. Thanks
Schönes video ! die gute alte zeit (= und da hinten in der ferne ist das Gröse Möbel Geschäft (=
Nice!
Und Gratulation zu 5000 Abonnenten!
oooooh jetz erst gesehn :)
That would be useful to obtain a realistic scale appearance on other helicopters. For reference, the rotor of a Bell UH-1 only turns at 324 rpm.
Putting it in a HUGHES 500 E ,700 SIZE HELICOPTER WITH A FIVE BLADE MAIN ROTER,AND A 4 BLADE TAIL ROTER,PLANON RUNNING IT WITH JUST ONE 8000 BATTERY ,6 S,22.2 VOLTS
theres no need to write in capslock, please...its just exhausting for the eyes to read
kontronik escs are super high quality and in my personal opinion it should work for a 700 scale machine. although it is not really possible to give a good opinion about it as i do not like to give "distance diagnositics" i cannot guarantee that it works as you expect, i just say that i THINK it should work with a 700size.
i would recommend to NOT fly it with a 6s battery. a very lightweight 700size trainer can be flown with that, but a scale machine with a multirotor head and a lot of weight will drag a lot of current. this will make your motor and esc overheat and kill your batteries very quickly. consider doing a 10-12s setup please
Spannendes Experiment und schön geflogen. 😃👍🏼
danke
Hi Simone, I did enjoy it... thank you. Not that I'm even close to 3D yet, but I enjoyed it slowed down, which would give an old fart like me more time to think! Looking forward to more of your vids! Take care!
thank you
Hello from Canada Simone! nice to see you out experimenting. I am still flying and learning with my 500. One day though I will upgrade and will be bothering you for your low rpm 700 setup.. I really prefer your flying style versus hard 3d. Nice seeing you , take care!!
glad to hear that, thank you!
Very good flight :-)))))) iam wating next week for the new 580 E Kraken 12S:-)))) VLG aus Alicante Spanien , echt bewundernstwert !!!!!!!!!!!!
Well theirs only one girl that i know who can do that and i was warned .
Well done simone was laughing and hiding behind the pillow hoping you wasn't going to crash love it so much ,see what you mean not afraid of the 770
Was lovely to meet you on Saturday rather nerves to say hello but got there in the end, thanks for the photo to.
really enjoy your videos.
ooooh come on... i never understand why people be nervous when talking to me ^^ i am a completely normal helli addict person like all of us are :) was nice to meet you at helifest!
Great video I have the same heli with SHS stretch kit and I definitely want to add 3 blade tail and do same tests thank you for this video.
yes it makes a difference, good idea!
Erinnert mich an meinen Logo 20 vor gefühlten 100 Jahren. (24 NiCd Zellen Sanyo 2400) Vor allem der Sound. Mal etwas anderes. Top Simone :)
danke
Hello Simone.. great to see a new video by my soulmate. LOL I am amazed that 1000 RPM worked at all. You are a confident and great pilot Simone! I love your flying. So graceful. Did you use governor on these flights?
yes i always use the kontronik governor
Mit 1000 rpm hört er sich an wie ein echter Heli.
Wie schön.
cool oder?
Ja, absolut!
Und da der Heli recht leise war, klang der Heckrotor so schön durchdringend, einfach super.
Auch die Umgebung des Fluges über dem Feld gefällt mir sehr.
So fliege ich auch immer, etliche Momente bleiben davon für immer in der Erinnerung!
Sehr schön geflogen :)!
PS: Ich würde nicht über einem Rapsfeld fliegen. Wenn der Heli da drinnen landet, wird der verschluckt. Das Zeug ist so dicht und undurchdringlich, da hat man kaum eine Chance. Meiner lag vier Wochen in einem Rapsfeld X) und nur durch viel Glück habe ich den wieder bekommen. Der Heli kann 15 cm vor dir liegen und du siehst ihn nicht.
hey olli. ach das passt schon. rapsfeld crashes hab ich schon genug gesehen in den letzten 10jahren. das gute ist, dass dabei fast nichts kaputt geht. und wenn man nicht allzuweit weg fliegt findet man den heli auch wieder. wir hatten zumindest nie ein problem :)
Oha, wie ist es denn dazu gekommen, dass dein Heli 4 Wochen in einem Feld rumlag?
OKAY, I'll do that and appreciate your feedback on that .thank you so much Jimmyjam in Montgomery ALABAMA
Hay Simone, great seeing you fly elegant and precise. Your 770 at 1000rpm sound simular to my 800 the mains cracking the air sound beautiful. Did you fined that the tail authority is greatly improved and more precise? I'm keen to see if your 770 will hover with head speed at 835rpm? Graceful flght as always!
i will definitely try to get around 900 rpm and see if it flies.
Simone Zunterer sounds like fun. Some friends asked me about the power in my 800 so I used her to clip the ash trees their look was priceless.
Great seeing some slow 3d flying, makes a change from screaming, give me a break, type flying you normally see
thank you :)
From time to time fly my e700, remember those Simone? on 6S barely heavier that my old goblin 570 on 6S... really slow 3D.
yes the e700 was a nice machine
Hello Simone....very smooth flying, did you add more tail gain everytime you lowered the headspeed with the different voltages?
nope as i said in the video i didnt change anything in the setup. i wanted to see if it works with all the same setup
Can I ask what flybarless controller you are using?
I bought the 770 for low headspeed, big air and I cannot stop it nodding below 1500RPM with the Spartan VX1N. It is fine at 1600RPM+.
I added the HPS2 head and 3 blade tail and tried SAB 770 and Align 780 blades (the main reason for the 3 blade plus 105mm tail blades to ensure clearance) but nothing stops the nodding and it gets worst if I lower the headspeed further to say 1350, so not just a resonance problem?
i use the graupner fbl in all my helis. the nodding that you describe is also visible in some of my helis at low rpm (my black thunder does this at 1300). its something that you can maybe get rid of by using softer dampeners or playing around with the rpm. but mainly its a typical thing that just happens. you only see it when hovering so just fly and dont overthink it
AS MULHERES NAO GOSTAM DESSE ROB, PARABENS PELO SEU INTERESSE E DEDICAÇAO...
:)
Hello Simone . Did you test with 950 , 900 , 850 rpm ? I have a Shape S8 with asymetric blades / 12 s . I should like to fly with 850 rpm or 900 rpm ( for only a realist flights ) : is it possible ? Thank you , and a nices flights for you .
I only tested what you can see in the video. In my opinion the heli is a bit too heavy to fly it with ultra low rpm. Also be careful when getting into the rpm range where it gets into self-resonance and begins to shake like crazy :/
Good job! I like how he said " emm emm" with that 6s test. I was saying " don't lift off! " LOL! cheers!
haha yes he thought "when it crashes she will be in bad mood for the whole weekend" ^^
Eine frage: Wieviel grad Kollektiv sind eingestellt bei 1000U/min ?
Edit: Beim versuch mit 6S sieht es nach zu straffer Kopfdämpfung aus, denke fliegbar ist diese Drehzahl schon aber was laber ich, das weißt du als erfahrene Pilotin sicher auch :-)
Ich habe an meinem Setup in allen Teilexperimenten nichts geändert, überall +/- 12° Pitch
that was cool!, enjoyed the retro rotor sound!, surprised it tried to fly at 710rpm
it tried is a nice explanation ^^ i definitely want to come under 1000 with this setup
Que lindo video eh!! SOS una genia y te mando saludos y no quisieras venderme uno 😉 gracias
By the way ; have you ever flown a Ikarus eco8? (8 as in 8 cell NiCad and the brushed motor) If not you might be able to find a Robbe "eolo" that also came with a brushed motor.
Or go really "hardcore" with a picolo or esky honey bee fp ;)
hahaha, well my first CP heli was a walkera df37 with brushed motor ;)
100 mal schöner als dieses Megagezappel, das man sonst sieht.
das freut mich ;)
Eventuel mal mit 8s Aakku versuchen der sprung von 10s auf 6s ist schon recht heftig , denke aber mit 8s sollte es klappen zumal er ja zart gezuckt hatte aber das reicht natürlich nicht um halbwegs save zu schweben . Den Sound fand ich sehr cool es klang sehr realistisch was für normal und spale Helis sehr interessant wäre zumindest wichtiger als die performance .
sicherlich wäre 8s ein besserer zwischenschritt. wollte aber für ein einziges video nicht unbedingt in eine 8s stange investieren die ich dann nirgends mehr nutzen kann ;)
very nice style
thank you
What KV motor are you running? Getting my older used 770 ready to fly soon and was hoping I could fly 6s on low head speed. It's not looking good lol
this motor is a pyro 800-48
it is meant for 12s. not recommended to use that one for 6s. it was just for trying it out
Que lindo y qué baterías tiene y cómo están conectadas ??
he puesto las informaciones de 12s, 10s and 6s en el video
ich hab jetzt auch ein goblin 770, erstes Modell, also kein competition. ist die umrüstung auf bigbelt wirklich nötig ??
Das kommt immer darauf an was du fliegst. Aber normalerweise sind diese upgrades aus einem guten grund entstanden. Falsch ist es sicher nicht
@@SimoneZunterer danke:)
buddy of mine did 770rpm on specter v2
Sounds great. Depending on the Heli you can go super low on the rpm
Wie machst du das bei einem neuen fbl mit der heckempfitlichkeit im gov langsam mehr Drehzahl also Gas gerade erhöhen bis zum gewünschten Drehzahl in kleinen Schritten oder gibt's da bessere Idee en?
Ich bin mir nicht ganz sicher welche jetzt die Frage war :) also wenn ich einen bereits eingestellten heli habe bei dem das Heck hält dann kann man normalerweise auch mit der Drehzahl runtergehen. Es ist dann natürlich nicht mehr so direkt und „crisp“ wie bei hoher Drehzahl, aber daran lässt sich wenig ändern. Wie du deine Drehzahl einstellst ist persönlicher Geschmack. Entweder du gehst auf eine vorher gewünschte Zahl oder eben nach Gefühl
@@SimoneZunterer kann ich das heck ohne haubtrotor Blätter einstellen hochdrehen lassen auf 85%regler Öffnung und er stabil stehen bleibt Blätter drauf testen?
@@ursschmid8685Dein Heck wird im Stillstand eigtl immer halten weil nicht viel Last drauf ist. Die Last im Flug ist immer eine andere
Wahnsinns Blattgeräusch B-)
oooooh ja
this is my speed all the time
i fly my 800 dfc and 700 e on 1 6s i use a castle edge 160 it just counts 6s im guessing the vbar is set to 1900 so with a 6s its around 800 but to be honest i think 1000 is minimum for a big bird i get over 7 min up to 1500 rpm and dont like hard core stuff so no need to go higher then 1700
1700rpm with a 800size machine is a lot, considering that you dont wanna do hardcore stuff. depending on the heli i would say between 1000-1200 is a very good rpm for flying relaxed soft 3d
Hi Simone, your flying skills is awesome. I love the way you do this smooth slow 3D, I hate pilots who do violent 3D mves. Must say, you are a very nice #Sucksy lady. Would love to me you one day and fly helis all day. Good to experiment with low head speed. This will make scale flying super sick. I am saving up to buy a Roban Airwolf Fuselage 800 size in August/September. Happy experimenting sweety
thank you
Hi Simone, I am planning to buy the Graupner mz-18 V2 - 9 Channel 2.4G.HZ HoTT Color TFT Transmitter. I was thinking of the Graupner mz-24 V2 12 Channel, but it is very expensive. I need to know, will the Graupner mz-18 V2 - 9 Channel be able to operate the Landing Gear of the Airwolf 800 size heli I will be buying soon? If so, thn am super stoked as it is much cheaper to have.
@@waynegetkate9315hey wayne. i cant really answer that to 100% as i dont know all the details. in general you need to calculate 6channels for your regular heli to work. then every additional function (lights, landing gear, cranes etc etc) needs an additional channel. but that also depends on the type of landing gear you wanna use. i am not an expert in scale stuff and i am not very familiar with all the functional extras there are on the market and how they work. the safest way would be to ask your local dealer and show him what you wanna use
@@SimoneZunterer Hi, thanks. I have been chatting to guy at GraupnerUSA, but think he just wants me to spend more on the Graupner mz-24 V2 12 Channel. I want the truth as am not gonna waste my money. I will ask around at other Distributors,then decide. I just need to know if the Graupner mz-18 V2 - 9 Channel can operate Landing Gear. I treally have to give deep though on these two Graupner Radios and hope to get truth from other Distributors. For the Airwolf 800 size, it needs to operate landing gear. Not interested in LED's & other stuff
@@SimoneZuntererYou musst remember that the Radio is important. It is not only for scale flying, it is for 3D & F3C. I don't want a Radio under 8 channels, but the Graupner mz 9 channel should operate Landing gear. Maybe you can ask some one about the two graupner Radios. I love the way you fly slow smooth 3D, it's more like F3C.
Wrecked helicopter donated?
We adjust the rpm speed with remote
yes is do the same. but as this setup is meant for 12s i cannot get lower with the throttle curve before the ESC wont start. So the easiest thing is to reduce cell amount to get lower headspeeds and also less weight. as i said multiplt times: its an experiment for fun, not an advice to do so for everyone
So I’m thinking 6s is no good & everything but the main interest here is how smoking hot Simone is in that jumpsuit! Hands up who’d like to see a try on haul with Simone?
hahahahaha
if many people want that i will do it!
Isnt it bad to run a 12s motor on 6s
no
that always depends on what you wanna do. if you want to fly hardcore 3d with only 6s you will have higher current on the battery which results in shorter lifespan. also you will have to take care if the motor and esc overheat as they have to work a bit harder. but if you want to fly smooth and slow it shouldnt make any big difference. in the worst case you still can change the pinion. in my video here i just did that as a test. i will still fly it with 12s in the future
Thanks for the info and response
Ual... 😍😎
:)
I could REALLY USE YOUR HELP ?
well if you write me how i can help i will try my best
Simone Zunterer I have a German KONTRONIK 160 HIGH VOLTAGE ESC ,I WAS WONDERING IF YOU ARE FAMILIAR WITH THEM???
i use kontronik esc but i only have experience with the helijive 120 the jivepro 120 and the kosmik
your audio is so low in this video its barely heard, its th e way your recorded it
hm weird. i upregulated the volume of all clips in my editing program and also if i listen to it here on my pc its all perfectly audible?!
Please give me the link so that I can buy it at night.
i dont know which local hobby shops are around you so it doesnt make any sense to send you random links of shops that are not even close to you. just search for hobbyshops in your country that sell sab helis
Zunterer Topline
hahaha :)
Simone Zunterer hihihihihi
Show
:)
what's the deal with the first few mintues? can't see what you're doing?!
i recently retwatched this video, too and know what you mean. it seems i recorded it in 4k and forgot to scale the video down. sorry for that
Talk about a "can of worms"
This whole discussion about "cell-count" is a hype that is showing manny rc pilots know little about the science behind flying helicopters.
For a helicopter to fly it needs lift.
Lift is a form of energy (hugely simplified)
This energy has to come from somewhere; with electric its the batteries.
Energy can be defined by "watt hour" (energy multiplied by time)
Times thousand you get "kilo" watt hour and that is what you can find on your electricity bill.
Watt is current (ampere) times potential (volt)
This means that a potential of one volt times a current of 10 ampere is the same amount energy as 10 volt at one ampere.
Both give 10 watt
So your 12s pack that is rated 44.4 volt at 50 ampere gives the same power as a 6s pack (22.2) at 100 ampere
You used the same motor and gearing and that is why your heli performed different.
The electric motors we used have a "kv" constant.
This is how fast it turns (rpm) for each volt
So the kv of the motor times the pack voltage is how fast the motor will turn at full power.
That combined with the gear ratio pinion/main gear dictates your maximum head speed.
If you would have changed the motor to one with a kv that is double of the one you use on 12s then you would have had the same performance on 6s as you have on 12 s
OR if you had changed the motor pinion to one with twice the number of teeth.
So why higher cell counts if lower voltages should work as well in theory,
Resistance.
Resistance in ohm is potential (volt) divided by current (amp)
So if you take a one volt battery and put a one ohm resistor over it you get a current of one amp.
But there is more;
Remember one amp times one volt is one watt
So you are taking one watt of power out of that battery.
That power has to go somewhere and most of the times that becomes heat.
This is why motors esc and batteries get hot.
They have internal resistance and when current flows trough them they get warm.
When you use 12s instead of 6s the current for the same amount of power is halved.
So the amount of heat as a result of internal resistance is also halved.
The energy that is not changed into heat can be used to power the motor/ helicopter.
There is also something called "wake turbulence" and that is why 3blade rotors/ props are much less efficient then 2 blade so by installing a 3 blade tail you mad the efficiency of your helicopter even worse.
Longer tail blades would have been better if you had a way to avoid those blades hitting the ground or main blades.
If you really want to go for efficient try single blade ; use a counter weight to balance the blade.
Then this single blade hits less (or no) turbulence of the blade "in front of it"
Search for a guy called "night flyer" ; he shown how its done on his channel.
Again disclaimer; all of the above is simplified
thanks for the info. i am well aware of all that you wrote above, so its not new for me. of course, if you would like to build a 770 that performs perfectly with a special set of batteries i would recommend to find the fitting motor, esc, gear ratio etc. unfortunately it seems you didnt listen to my explanation at the beginning of the video. the whole point of the experiment idea was NOT to change anything and see how it turns out
did you measure the current and how hot your motor and esc got?
"all else remaining equal" it should have needed twice the current as before causing the motor and esc to get warmer.
See how your experience is matching theory
By the way did you feel that the heli was much less responsive?
Also that "chirping" sound of the blades; while i don't know for sure i assume they are close to stalling leaving a rather small useful pitch range (speaking from experience with a raptor 30 and a poor running engine)
Anyway nothing broke and you learned something :)
while flying 3d i couldnt look onto my telemetry but with 10s i head a current while hovering of 25A which is fine for me. neither motor or esc were hot which is why i safely could leave the whole setup as it is
Immer wieder ein Vergnügen dir beim Fliegen zuzuschauen. Sag doch mal dem Bauern der soll die Zufahrt mähen damit du besser starten kannst. ;-)
hat er inzwischen ;)