Throttle Servo mounts
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Throttle Servo mounts
I'm building a B-17 and want to keep the throttle servos on the front side of the firewall. Initial thought is to mount them on phenolic sheet mounts driectly on the engine mount lugs. Photos will show idea. The reason is to keep throttle set up as simple as possible and in an easy to get to location.
I would like inputs from those of you who have actually used a similar setup, perhaps not an engine mounted servo but at least installing servos on the front side of the firewall. How successful was your setup, what kind of servos did you use, what are the best servos with respect to vibration, etc.
Thanks,
Speedbrake
I would like inputs from those of you who have actually used a similar setup, perhaps not an engine mounted servo but at least installing servos on the front side of the firewall. How successful was your setup, what kind of servos did you use, what are the best servos with respect to vibration, etc.
Thanks,
Speedbrake
#2
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RE: Throttle Servo mounts
I think with that setup you're just begging to have your servo shaken to bits and possible have the mount fail in flight. That cantilevered mount is going to actually amplify the vibrations from your engine, which is already going to be pretty bad because you're mounting it to the engine mount of a 4 stroke. It will be better to go the traditional route and put the servo somewhere behind the firewall and drill a hole for a tube to go out to the throttle.
#3
RE: Throttle Servo mounts
If you decide to try it, find some servos that have good seals or are waterproof. Fuel residue inside the servo housing is not going to work out very well. I have heard of people mounting servos out front so hopefully some will post of their experience.
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RE: Throttle Servo mounts
I have to agree with a previous post, I think the vibration will be excessive, and having it cantilevered mounted will amplify it for sure, and on a 4 stroke which only generates a great amoumnt of vibration will only be asking for a problem, great idea if it would work.
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RE: Throttle Servo mounts
Several years ago I raced giant scale AT-6's. I had the throttle servo mounted under the engine and a straight shot to the carb. I monted the plate on rubber and used the regular servo mounts on the plate. Worked great for three years.
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RE: Throttle Servo mounts
Thanks for the inputs. I might try mounting on the firewall and using bellcranks. A previous B-17 project had servos mounted on the back side of the firewall and they were difficult to set up. I'll keep messing with it until I find a good solution.