Howto - Dual to Single aileron conversion
04-21-2009, 04:09 PM
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Howto - Dual to Single aileron conversion
I have a Lanier Edge 540 87" that was set up originally to accept 2 aileron servos.
I am planning to go with a single HD Power 9150 (222 oz/sq in) servo.
Which is a better location to run a single servo...the inboard or the outboard servo mount.
I compared the wing panel with the wing of an EF Yak 54 88".
The placement of the single servo on the Yak is about 1.5" out (towards the wingtip) when compared to the inboard servo location on the Edge.
I believe that many have converted their 33% planes to use single servos as well.
Thanks.
I am planning to go with a single HD Power 9150 (222 oz/sq in) servo.
Which is a better location to run a single servo...the inboard or the outboard servo mount.
I compared the wing panel with the wing of an EF Yak 54 88".
The placement of the single servo on the Yak is about 1.5" out (towards the wingtip) when compared to the inboard servo location on the Edge.
I believe that many have converted their 33% planes to use single servos as well.
Thanks.
04-22-2009, 09:30 AM
#3
RE: Howto - Dual to Single aileron conversion
Some folks are using single servos on wings designed for two and report varying results.
There are basically two reasons for having dual aileron servos per wing; it's an older design which did not contemplate the availability of the high torque servos we have now and.... the construction of the aileron itself. That's important as there is flex in most ailerons and going with two attach points cuts down on that flexing. If you make the aileron stiff enough to resist flexing it adds weight which can be compensated for to some extent during the design phase.
If you put a single servo on the inboard point of a model designed for two servos, you'll most likely have issues with that flexing. It might be fine for 3D flying with low airspeeds, but cause you grief when trying to do precision aerobatics like IMAC. Depending on the model, high speed flight may even result in flutter of the outboard section of the aileron.
As I said, some guys have done this but most who convert to one servo will relocate that single servo to provide a more centerd attach point on the aileron and cut down on the flexing that will occur.
There are basically two reasons for having dual aileron servos per wing; it's an older design which did not contemplate the availability of the high torque servos we have now and.... the construction of the aileron itself. That's important as there is flex in most ailerons and going with two attach points cuts down on that flexing. If you make the aileron stiff enough to resist flexing it adds weight which can be compensated for to some extent during the design phase.
If you put a single servo on the inboard point of a model designed for two servos, you'll most likely have issues with that flexing. It might be fine for 3D flying with low airspeeds, but cause you grief when trying to do precision aerobatics like IMAC. Depending on the model, high speed flight may even result in flutter of the outboard section of the aileron.
As I said, some guys have done this but most who convert to one servo will relocate that single servo to provide a more centerd attach point on the aileron and cut down on the flexing that will occur.
04-23-2009, 08:22 AM
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RE: Howto - Dual to Single aileron conversion
ORIGINAL: Zeeb
Some folks are using single servos on wings designed for two and report varying results.
There are basically two reasons for having dual aileron servos per wing; it's an older design which did not contemplate the availability of the high torque servos we have now and.... the construction of the aileron itself. That's important as there is flex in most ailerons and going with two attach points cuts down on that flexing. If you make the aileron stiff enough to resist flexing it adds weight which can be compensated for to some extent during the design phase.
If you put a single servo on the inboard point of a model designed for two servos, you'll most likely have issues with that flexing. It might be fine for 3D flying with low airspeeds, but cause you grief when trying to do precision aerobatics like IMAC. Depending on the model, high speed flight may even result in flutter of the outboard section of the aileron.
As I said, some guys have done this but most who convert to one servo will relocate that single servo to provide a more centerd attach point on the aileron and cut down on the flexing that will occur.
Some folks are using single servos on wings designed for two and report varying results.
There are basically two reasons for having dual aileron servos per wing; it's an older design which did not contemplate the availability of the high torque servos we have now and.... the construction of the aileron itself. That's important as there is flex in most ailerons and going with two attach points cuts down on that flexing. If you make the aileron stiff enough to resist flexing it adds weight which can be compensated for to some extent during the design phase.
If you put a single servo on the inboard point of a model designed for two servos, you'll most likely have issues with that flexing. It might be fine for 3D flying with low airspeeds, but cause you grief when trying to do precision aerobatics like IMAC. Depending on the model, high speed flight may even result in flutter of the outboard section of the aileron.
As I said, some guys have done this but most who convert to one servo will relocate that single servo to provide a more centerd attach point on the aileron and cut down on the flexing that will occur.
Well Said
04-23-2009, 03:26 PM
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RE: Howto - Dual to Single aileron conversion
Thanks Zeeb.
What I have noticed is that many of the 50cc or even the 75cc planes designed for single aileron servos don't have the servo in the exact middle of the aileron.
It is more towards the inside (towards the wing root)....almost at the 35-40% mark (If you consider the root to be 0% & wing tip 100%).
What I have noticed is that many of the 50cc or even the 75cc planes designed for single aileron servos don't have the servo in the exact middle of the aileron.
It is more towards the inside (towards the wing root)....almost at the 35-40% mark (If you consider the root to be 0% & wing tip 100%).
04-23-2009, 03:46 PM
#6
RE: Howto - Dual to Single aileron conversion
Mike McConville, the guy who designed the Hangar 9, 46% Ultimate, recommends using the inboard servo location when only using one servo instead of two on that plane. When I scratched built my profile, I postitioned the servo so that the horn would be right in the center of the aileron. You don't have that luxury, so I'd use the inboard one. By the way, them are Carden 40% Edge wings that are 52" long each.
