Autothrottles & servos disconnect
Hi,
I am building a 737 throttle assembly with A/T servos and I have come up with a way to disconnect the servos when the A/T is not active so that you can move the throttles manually. I made a drawing that describes how I plan to do it and I'm wondering if my idea will work or if I have missed something crucial.
I would appreciate any comments from anyone who thinks this might or will not work for whatever reason.
Thanks,
Maurice
http://i32.photobucket.com/albums/d3...rvoswiring.jpg
Re: Autothrottles & servos disconnect
Hi M - did you find the answer to this one yet? I'm guessing the power would have to be switched off somehow when any none of the at modes are active - ie, the at thrust annunciation in the fma is blank - what happens if you have the porwe to the servo running, but are not in any AT mode on your set up? Will the servo hold the last position it was in?
cheers,
FC
Re: Autothrottles & servos disconnect
Quote:
Originally Posted by
farrokh747
Hi M - did you find the answer to this one yet? I'm guessing the power would have to be switched off somehow when any none of the at modes are active - ie, the at thrust annunciation in the fma is blank - what happens if you have the porwe to the servo running, but are not in any AT mode on your set up? Will the servo hold the last position it was in?
cheers,
FC
This is how I resolved my problems. This works perfectly for me and although it may not be the best solution, it does everything I need it to do.
Basically, power is supplied to the servos if the autothrottle switch is on and if either TOGA, Airspeed or Mach hold are on. The A/T disconnect on my throttle assembly turns off the autothrottle and that automatically removes power to the servos and allows me to move the throttle handles & control the power manually.
The spare inputs to the OR gate can be used if there are other conditions that require power to the servos, but so far I haven't found any (I'm sure there must be other times when that would be required, and if I find out what it is, I will use the spare inputs).
http://entertainment.webshots.com/ph...51510320bvfAHE
Regards,
Maurice
Re: Autothrottles & servos disconnect
Hi maurice - thanks for the diagram - will see how I can make it work for me -
Happy New Year -
c
FC