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In the SS7 kit, does anyone know the amp draw on the trim motor for the elevators, I want to use a stick control, Ray Allen would be my first choice as I have that in the plane I am flying now. It is really nice to have this on the stick rather than reaching around/down for the same function.
I am trying to get my Garmin auto trim to function with this trim motor. Just spoke with John M. On Thursday. I get to spend $250 for a special device to allow the Garmin to operate that motor. I believe he said it was a 7 amp motor. Much higher than the Ray Allens. He definitely knows that answer so I would call him. I guess what I am saying is, don't quote me on it. I didn't commit it to memory as I just stopped listening when I found out I had to spend $250 more dollars to get my AP system operational.
Eddie
Thank you,
I will send an email out to Kitfox, Yieks, $250.00 is high for this operation.
Jim
My information on the trim motor also agrees with 7 amps. A 7.5 amp circuit breaker was recommended for this circuit.
Just use a relay with the Ray Allen switch... or am i misunderstanding the question?
Quote:
Originally Posted by Geowitz
I have a spare used relay I’ll sell you. PM me if interested or contact me on mike (at) wolflakeairport (dot) net
Thanks!
There are 3 methods.. If you are NOT using an AutoPilot with auto trim you can simply use 2 relays (Trim up & Trim Down) Each stick control is run in parallel to the relays.Quote:
Originally Posted by Flybyjim
2nd option is to purchase the safety trim from us.. it also has the airspeed switch that slows the trim down at cruise speeds. $230.00
3rd is with the Garmin system Autopilot (haven't tested any others) Requires a different safety trim device due to the amp draw. $245.00
This is how I did it. I used Ray Allen grips/switches and it works fine. Just need to make sure the relay contacts can handle the motor current.
You will need 2 double throw, double pole relays.
http://www.homebuiltrovs.com/howtorelays.html
I will consider these options and still do some more research on how the relays work and speed controllers. Since there is just a switch provided with the kit and no relay, is the relay built into the provided switch? There are many things I know or at least I think I know, but electrical is on the low end of the knowledge curve for me.
Thank's guys
There is no relay built into the switch, Jim. It is a relatively simple 2 pole 3 position, momentary contact switch. When wired the right way it’s used to reverse the polarity of the d.c. voltage going to the trim motor. The thing is that it has large enough contacts for the electrical load in this application as well as the proper mode of operation, and the switches normally available and small enough for mounting in a stick grip do not. It’s easier, if using those switches in the grip, to control a couple of relays with adequate size contacts to perform the same function. Why two relays? A single relay of the proper design could do the job, but it would be a more expensive, complicated and less common design... probably either basically a “double relay” with 2 coils in one package or a solid state design of some sort. That’s my take on it anyway.Quote:
Originally Posted by Flybyjim