EG Aircraft 100cc wing servo

[MODE 1]

Got a question for anyone that knows about this size model from EG International.
The wing comes with a single servo hole cut out way less than the middle of the aileron and another covered over near the tip.

Can you get away with using a single servo in this location on this size Extra instead of using 2 servos?

I'm concerned about too much flex in the aileron due to the current location of the open servo hole.
If it was one of my builds it would have had the single servo nearer to the aileron center.

[bpetty620]

Mode 1 are you talking about the Extra 300 from OMP that is made by EG aircraft?

[robertp17]

	Quote: Originally Posted by MODE 1
	Got a question for anyone that knows about this size model from EG International. The wing comes with a single servo hole cut out way less than the middle of the aileron and another covered over near the tip. Can you get away with using a single servo in this location on this size Extra instead of using 2 servos? I'm concerned about too much flex in the aileron due to the current location of the open servo hole. If it was one of my builds it would have had the single servo nearer to the aileron center.

I have asked this question to several builders / manufacturers and they say that if your going to run only on servo then the optimum place for it is about one third from the inner end of the aileron. The answer I got was that it works best there because it still has a decent amount of size there and that being the widest part of a tapered aileron is going to need the arm there to keep it from fluttering. I realize that a wood aileron as opposed to composite can be flexed easily but there is a reason that most airframes are designed this way.

[MODE 1]

	Quote: Originally Posted by bpetty620
	Mode 1 are you talking about the Extra 300 from OMP that is made by EG aircraft?

Yep

[MODE 1]

	Quote: Originally Posted by robertp17
	I have asked this question to several builders / manufacturers and they say that if your going to run only on servo then the optimum place for it is about one third from the inner end of the aileron. The answer I got was that it works best there because it still has a decent amount of size there and that being the widest part of a tapered aileron is going to need the arm there to keep it from fluttering. I realize that a wood aileron as opposed to composite can be flexed easily but there is a reason that most airframes are designed this way.

This is less than a third it's only approx 6" or a quarter from the inner aileron end.

[tkapfer]

I personally think when you start getting into the 100cc and up size airplanes, it is HIGHLY recommended by most to use at least 2 servos per aileron. There gets to be a tremendous amount of stress put on the ailerons for this size, especially if you are doing any type of 3D. It's much easier to strip out one servo gear than two. There also is a greater chance of flutter or flex in that long of an aileron so two servos would support that better. I wouldn't want to trust my 4 thousand plus dollar airplane to just one servo. Just my 2 cents worth.

As a matter of fact, in my 100cc plane that I fly, I actually have 2 JR 8711 servos in each wing. Probably overkill, but the crispness and responsiveness is awesome.

[robertp17]

I agree that in most airframes two should be used however I ran one on my 2.6 meter comp for the last year with no problems and probably put 300 flights on it this way however the composite is much more rigid and cant be flexed much.

[MODE 1]

Guys we are going off track here. I am aware one servo can be fine in a 100cc frame. I appreciate the everyone has personal opinions on everything. But my question relates to THIS model with its unique individual setup. If someone has this model and has used only a single servo in the wing at the provided open servo cut out can they comment on this point as to whether it is adequate enough given the close proximity to the aileron root, and the severity of the offset.
The manual does say a single servo can be used in the cut out placement. However what the manual says and what the pilot feels during his routine are not always in agreement.

[jaguar bone]

	Quote: Originally Posted by tkapfer
	I personally think when you start getting into the 100cc and up size airplanes, it is HIGHLY recommended by most to use at least 2 servos per aileron. There gets to be a tremendous amount of stress put on the ailerons for this size, especially if you are doing any type of 3D. It's much easier to strip out one servo gear than two. There also is a greater chance of flutter or flex in that long of an aileron so two servos would support that better. I wouldn't want to trust my 4 thousand plus dollar airplane to just one servo. Just my 2 cents worth. As a matter of fact, in my 100cc plane that I fly, I actually have 2 JR 8711 servos in each wing. Probably overkill, but the crispness and responsiveness is awesome.

Dittos to what tkapfer said.
I personally believe the single servo cut out is a production issue - not a suggested equipment setup. (either both should have been cut out - or neither)
I have never seen a singe aileron set up on a 100cc high performance airframe.

[Bulldog9]

All of the EG Aircraft planes OMP has are designed for two servos in the wings. The ailerons are light and should have two servos attached to them. The servo openings are spaced properly for two aileron servos. We don't why the factory cuts the covering out on the inboard servo bay. If you are going to do smooth aerobatics and general sport flying, you could probably get by with one servo. If you are going to do 3D, you better have two servos in the wings. I hope this answers your question.

[MODE 1]

	Quote: Originally Posted by Bulldog9
	All of the EG Aircraft planes OMP has are designed for two servos in the wings. The ailerons are light and should have two servos attached to them. The servo openings are spaced properly for two aileron servos. We don't why the factory cuts the covering out on the inboard servo bay. If you are going to do smooth aerobatics and general sport flying, you could probably get by with one servo. If you are going to do 3D, you better have two servos in the wings. I hope this answers your question.

Thank you for the reply. Who are you?
Are you an employee of either OMP or EG or do you own the 100cc Extra and your info is based on personal knowledge?

[tkapfer]

	Quote: Originally Posted by MODE 1
	Guys we are going off track here. I am aware one servo can be fine in a 100cc frame. I appreciate the everyone has personal opinions on everything. But my question relates to THIS model with its unique individual setup. If someone has this model and has used only a single servo in the wing at the provided open servo cut out can they comment on this point as to whether it is adequate enough given the close proximity to the aileron root, and the severity of the offset. The manual does say a single servo can be used in the cut out placement. However what the manual says and what the pilot feels during his routine are not always in agreement.

Sorry, not trying to get you off track. I agree that what the manual says and what may or may not be actual many times vary. I would go with the 2 servos to be safe.
Besides, do you ever put these ARFs together and NOT reinforce the glue joints around the motor mount, landing gear etc. (Probably not). I've put many ARFs together just to find out they used VERY MINIMAL glue on the joints and they failed.

It may well work with 1 servo, but you don't know how well it is constructed beneath the coating to the structure.