RunRyder RC
 2  Topic Subscribe
WATCH
 1 page 1016 views
HelicopterScale Model RC Helicopters › Fenestron Tail servo ??????????
09-05-2003 06:07 PM  14 years agoPost 1
heliraptor

rrKey Veteran

Colchester, Essex, UK

My Posts: All  Forum  Topic

Hi

Just got off the phone earlier with John at Vario UK who recommended a Futaba 9206 for the tail on the EC135 I'm building and definitely only a normal rate gyro. The reason for the 9206 is the high torque it produces, and it doesnt really matter about the speed.

I have a Futaba 9350 (Simliar torque to the 9206 but faster 0.12 compared to 0.19) Would this suffice. My 9253 would be too weak.

What tail setups are you guys using.

I take it the 401 will suffice as long as I switch it to normal rate after switching on.

One other recommendation for John was to overdrive the tail by approx 30% dutign setup. this will make for a better handling tail.

Thoughts on the servo please.
Lee

PM  EMAIL  HOMEPAGE  Attn:RR  Quote
09-05-2003 06:12 PM  14 years agoPost 2
JP3DFLYR

rrApprentice

Chino Hills, CA

My Posts: All  Forum  Topic

why cant you use heading hold confused:

PM  EMAIL  Attn:RR  Quote
09-05-2003 06:58 PM  14 years agoPost 3
heliraptor

rrKey Veteran

Colchester, Essex, UK

My Posts: All  Forum  Topic

Hui

I believe it is due to the design of the Fenestron tail mechs, HH would wear them out in short order, plus they have very limited travel movement. the full scale is ony really happy hovering into wind (So I've heard) and this is the same for the Fenestron equipped model (So I've heard).

If anyone knows different let me know.

Plus in scale there is really no need for HH Gyros, I think they look more scale with the tail being let to its own devises during turns etc and not being driven into position by the pilot.

Lee

PM  EMAIL  HOMEPAGE  Attn:RR  Quote
09-05-2003 08:18 PM  14 years agoPost 4
Dave Hollins

rrApprentice

UK

My Posts: All  Forum  Topic

You've heard wrong

If the EC135 can only be flown hovering into wind it is obviously set up wrong. I have had the Skyfox version, turbine version and I am now building the Benzine version. All flew circuits with no problems. At the the weekend I setup a guys brand new Extreme version which was fully scaled up and it flew perfectly.

PM  EMAIL  GALLERY  Attn:RR  Quote
09-05-2003 09:40 PM  14 years agoPost 5
heliraptor

rrKey Veteran

Colchester, Essex, UK

My Posts: All  Forum  Topic

Hi Dave 's',

Like I said "So I've heard" and its obviously not correct, I didn't quite mean it will only fly into wind and be unable to turn, it was more aimed towards the heli being capable of carying out a sustained hover in say a wind directly from the side. Anyway, I dont know but will find out soon enough I'm sure.

Dave H, what setup would you recommend then for the tail, or what did you run with the Skyfox version ???????

Also any thoughts on the Non HH theory from John.

Wingtip, I'm assuming the hole you chose was as a result of testing the endpoint on the tail so me asking for a measurement is not worth it. I do have the 9253 but my initial post was as result of info from Vario UK, and not knowing myself whether it is suitable, have to go by what I'm told at this stage being my first Fenestron machine.

Also re the HH in flight, like you say depends on setup I suppose and personal choice, I'll see how that progresses but the advise form John at vario UK about using a HH gyro on the fensetron concerns me to say the least, yes it will work, however the main question to me would be "For how long ".

Awaiting your replies.

Cheers

Lee

PM  EMAIL  HOMEPAGE  Attn:RR  Quote
09-05-2003 10:59 PM  14 years agoPost 6
Dave Hollins

rrApprentice

UK

My Posts: All  Forum  Topic

My original EC135 (the multi coloured one in my gallery) was using a futaba GY501 gyro and the servo that came with it.

Vario Germany recommend servos: DS8231, C4421, 9206 and the Robbe G-300 gyro ( or NEJ-120 BB ECO mechanical gyro!!). I am now using the 9206 with the Robbe gyro on my new machine. They also recommend a strengthed servo arm with the output link 15-17mm from the centre. The fenestron is over driven on the ground to get the best performance out of it, the gyro will take this over drive away in flight. The speed of the servo is not important - the strength is, you are controlling 8 blades at high speed!!!!

I agree with you, I do not see the need for HH on a scale machine, if the engine is running sweet and the tail is set up correctly then the heli should not swing or wag. Full size dosen't need HH (maybe the cobra, if they start doing backwards rolls with the full size!!!)

Other Gyros will probably work??? Vario recommend what they have tested and what they know works. There is a whole page devoted to the Fenestron setup in the new catalogue BUT we are still waiting for the English version

PM  EMAIL  GALLERY  Attn:RR  Quote
09-05-2003 11:14 PM  14 years agoPost 7
heliraptor

rrKey Veteran

Colchester, Essex, UK

My Posts: All  Forum  Topic

Dave

Just what I was after.

Thanks very much. Juts hope Vario.de get a move on !!!
One final question, is there anywhere on line that advises about the blade setup on the Fenestron, i.e balancing etc ????

Also I may need a new set of blades, when span and looked at from the b;ade tips one or two seem to be warped slightly and are out of track. Any thoughts.

Lee

PM  EMAIL  HOMEPAGE  Attn:RR  Quote
09-05-2003 11:33 PM  14 years agoPost 8
Airman98

rrKey Veteran

Southern Illinois

My Posts: All  Forum  Topic

I run a 9252 on my dauphin with a 401.
Tim

PM  EMAIL  GALLERY  Attn:RR  Quote
09-05-2003 11:45 PM  14 years agoPost 9
heliraptor

rrKey Veteran

Colchester, Essex, UK

My Posts: All  Forum  Topic

Tim

You have got to get that finished (I take it by the pics in your gallery it isn't yet)

Do you run HH mode or switch out.

Lee

PM  EMAIL  HOMEPAGE  Attn:RR  Quote
09-06-2003 10:15 AM  14 years agoPost 10
Dave Hollins

rrApprentice

UK

My Posts: All  Forum  Topic

As long as you have the black plastic blades every thing should be OK. They don't need balancing. Look warped? I would would try them first (they are quite flexible), If you have a vibration try a new set.

If you have the original wooden blades then bin them and buy the new ones.

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 1 page 1016 views
HelicopterScale Model RC Helicopters › Fenestron Tail servo ??????????
 Print TOPIC  Make Suggestion 

 2  Topic Subscribe

Thursday, December 14 - 4:30 am - Copyright © 2000-2017 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online