What servo setup have ye found to be successful when weight conscious? Are 9650s acceptable on aileron?
Thanks

Yes at 6 volts..

Scott Anderson
NSRCA D3 AVP
Team Castle Creations
Team Tanicpacks.com

The last couple electric airplanes I've had, a Focus and a Genesis, have used 9650 on aileron. The servos center well enough to use for elevator, and at 6V they have enough torque at 62.5 oz/in... work great and very light. I have also gone to 9550s for elevator and rudder to save about an ounce over the use of full sized servos. Total weight savings is close to three ounces using those servos.

Tom

I used 9650's on a PL Lazulite with a Mintor 170 setup (shook like hell). They seemed fine at first, but the plane never really locked on (Thanks Tony F for helping me trim that plane). I then went to control horns that from the lower surface of the ailerons, stood off 1.25". This extra leverage made a huge difference in the way the plane flew. Then swapped in 9150s which are around 80 oz of torque - again - big improvement. Then, swapped in 9151, around 130 oz of torque, and have run them now for 3 years in various planes.

The electric setup being vibration free should help that servo a lot on the ailerons, but I would hessitate to think that 65 oz is enough torque (not enough for FAI). My personal feeling is that you should never skimp for weight savings on the stuff that matters to the feel of the plane (like servos) - if you are going to the nats and you MUST save weight - maybe - but not for any other reasons. Love the 9650s and use them on dual elevator setups or throttle, or smaller planes, just not on 2M plane ailerons. IMHO

Thanks,
Jim W.
Team Futaba

Thanks Jim, thought as much really, I am going to use them on dual elevater only,will use 9550s or similiar on aileron. Should still be OK weightwise

It wasn't too long ago that we didn't have servos that had 200+ ounces of torque let alone digitals. We had a guy in D7 whip the pants off most (all but maybe one) competitors in Masters with 5 year old (actually twice that I think) ANALOG servos with something like 50 oz/in... they were smooth, and coreless and no problem.

9650s work fine for ailerons in a electric plane, but it really is personal preference after all... You can never have too much torque, but you can have too little, I agree... but what is too little? I believe 62 oz/in is not too little when it's Digital... centering and holding power (here is the digital advantage) are far more important for pattern, within reason of course. IMHO

Don't knock it till you tried it!

Hi Tom,

Thanks for sharing all your posts on the forumn. Regarding the 9650, just a matter of preferance. Mine is for more torque as long as I'm under the weight limit
Jim W.

At the 2003 Worlds, I had one plane (same design) with 9650's and the other with 9151's on ailerons. The 9151 plane snapped better than the 9650 plane. The 9650's worked, but it took "a while" to get the snap going. The 9151 was an instant snap. So there is a point where too little torque is reached, at least for snapping maneuvers. Rolls were fine as long as there isn't too much speed to blow back the surface. I'd say up to Advanced, no problems.

It's a 'whole package' thing though. If you are having trouble snapping... or perhaps the plane is getting mushy in square corners than there is likely an issue that needs to be dealt with. However, if those issues are not there, then what's the problem? My Genesis is the best snapping plane I have owned starts and stops at once.

A guy asked if they would work. The short answer is yes, they will. The servos are cheap (an issue for some) and their centering are good and the torque is sufficient. that is also going to depend obviously on the plane, sequence, and his style.

With that said, if weight or money is not an issue... then why bother? I totally agree.

Personally I like to prove that things that people say won't work, will... like small aileron servos, AXI motors, small flight batteries etc.

just my 1/2 cent

I never ran the 9650's (thought the geartrains were too small for my liking)....but I did run the 9154's a lot, and the 9150's. The 9150s have decent torque but are fairly slow for my liking. The 9154's seemed great until I put some 9351's in the wing They are huge power (and fast) at nearly 200 in-oz, but the plane snaps, points much crisper than any other servo I have tried (never tried the 9151's). Have since replaced those with the new 9155 which is a bit smoother IMO than the 9351 (which is a car servo).

Although big torque is not needed, I think it adds just that much more to the airplane. In my mind there is a lot of difference between having something that simply works, and having something that is truely optimum for the application.

Same went for the rudder, the 9151 worked great, but the 9351/9155 adds a lot to manuvers like rollers and rolling loops....IMO the 9151 didnt have enough jam to do them cleanly.

Hi

Chad those 9155s , where are they available and what are specs/weight,

Thanks

Tower has them

http://www2.towerhobbies.com/cgi-bin...&I=LXMHB6&P=ML