Keep in mind that these are home made and they cost under $50.00 us. This is an overview of the throttles.http://forums.avsim.com/user_files/4296.jpgThis shows the stereo pots. The gear is allowed to slip on the pot shaft so as to not damage the pot if turned to far.http://forums.avsim.com/user_files/4297.jpgHere you see how the gear is attached to the hobby servo. also note the wood disc. The plastic gear was to weak to mount the leaver. also this keeps the gear from woobling on the shaft.http://forums.avsim.com/user_files/4298.jpgthese are the relays. the large one is the direction relay and the small one are the power on/off.http://forums.avsim.com/user_files/4299.jpgSo as you can see the throttles are very simlpe to build. They track the movement of the sims throttles and they are cheap. Next time I'll show the relay wiring.http://forums.avsim.com/user_files/4300.jpg

TVRON,Good work there. I am currently awaiting an FDS 777 throttle kit and my first EPIC cards and my goal has been to achieve moving throttles... you have shown the way.I notice that you are using relays to control the movement of the servos... are you also using the EPIC Servo Control Module, or are you connecting the relays to EPIC as on/off switches?Simon.

That's cool looking circuit of Auto Throttle here :DFew questions to ask:1) That toy hobby motor, is that one that uses for remote controller toys? If so... My concern is about the torque that is able to move the rods from this axis to another axis. Now I suppose if I told you that I build the throttle rod for B767, and each of them weights at approxmately 5 lbs. Would this motor give enough torque to turn this rod along with gears?2) The gear you re using, at what ratio is being used for Motor, Potentiometer, and the one attached to the rod?3) In a simulation situation where I find that the engine one went down, and of course as followed prodecure you would have to shut down the engine one. Let say if the autothrottle is engaged, and if the situation has happened. Would I be able to disengage the autothrottle?4) To disengage and reengage-- Let say, If I set up my autopilot IAS speed at 325, and the autothrottle set its axis to maintain IAS at 325.. and however if I decide I wanted to disengage the AT and do it manually then reengage (without changing AP-IAS) would that autothrottle perform to chnage and increase the axis to reached IAS limit?5) Would this work with FSUIPC or such another program? would this program be able to recongize the axis where it could stand to increase, decrease, and/or balance the airspeed? Let compare from Climbing, Decending, and Crusing. The Axis would have stood different based on the gravity. 6) Do you think you can create schematic or picture diagram of the Autothrottle circuit or course along with relay circuit too? It would be great if you could do it.Let me know...

Well, I didn't set out to write a book on auto throttles, just to share an idea and some pics but I will try to answer your questions.>1) That toy hobby motor, is that one that uses for remote>controller toys? If so... My concern is about the torque that>is able to move the rods from this axis to another axis. Now I>suppose if I told you that I build the throttle rod for B767,>and each of them weights at approxmately 5 lbs. Would this>motor give enough torque to turn this rod along with gears?The hobby servo is the type found in model airplans that controll the model in flight. As to the weight of the LEAVERS, no I don't think it could move 5 lb. My LEAVERS are made ok very light gauge alum. They move freely under hand control and the servos have no problem moving them.>>2) The gear you re using, at what ratio is being used for>Motor, Potentiometer, and the one attached to the rod?If you study the photos you see the large gear is 4" and the small one 1 1/2" this gives full throw on the analog pot.>3) In a simulation situation where I find that the engine one>went down, and of course as followed prodecure you would have>to shut down the engine one. Let say if the autothrottle is>engaged, and if the situation has happened. Would I be able to>disengage the autothrottle?Of course, why not. If you wanted you can use a rotuine in you EPL that would turn off that engins servo if the jet engin is not running.Look at the FSUIPC offsets for the jet engins.>4) To disengage and reengage-- Let say, If I set up my>autopilot IAS speed at 325, and the autothrottle set its axis>to maintain IAS at 325.. and however if I decide I wanted to>disengage the AT and do it manually then reengage (without>changing AP-IAS) would that autothrottle perform to chnage and>increase the axis to reached IAS limit?Yes, it tracks the sim. I did change the offset from leaver position to the N1 offset. This helped the servos from "hunting" as the AP changed the leaver position. Also this saved me from having to disingage the analog pot sending the signal to the sim.>5) Would this work with FSUIPC or such another program? would>this program be able to recongize the axis where it could>stand to increase, decrease, and/or balance the airspeed? Let>compare from Climbing, Decending, and Crusing. The Axis would>have stood different based on the gravity. Yes As I have said it tracks the sim.I use FSUIPC offsets as well. It is so cool to watch them throttle up and down as the sim increase or decrease the sim speeds.>6) Do you think you can create schematic or picture diagram of>the Autothrottle circuit or course along with relay circuit>too? It would be great if you could do it.Yes I will post a picture of the wiring as soon as I return home from a work trip. check tue or wed. I also have reduced the voltage to 1 1/2 volts to slow the movement down.