Originally Posted by PHIL GREENO

Decided to fit an aileron gyro on my new Carf Ultra Flash.I intended to use a Futaba GYA351 but at the last minute changed my mind and went for the new micro Futaba GYA 431 aircraft gyro which has just become available.Ripmax models have told me that the new micro 430/431 gyros will replace the older 351 which will no longer become available. The GYA 431 is a dual output unit and can be used on ailerons or elevator with two servos.The only limitation unlike the older 351 is if you want remote gain with a twin servo set up then you have to use a S-BUS receiver.As I use an 18MZ i decided to use the new Futaba R7008SBFASSTest telemetry receivers one of which came with the 18MZ set.This receiver is quite clever as you can use it in full S-BUS mode and have 18 channels with tele or set it up as a normal receiver with 1-7 normal channels plus one S-BUS port or 8 normal channels.If you use two of these receivers then you set rx one to channels 1-8 and rx two to channels 9-16 or a combination using one or two S-BUS ports if you need them.I had receiver one with 1-7 normal channels and input 8 S-BUS for the gyro and receiver two channels 9-16 all normal,this is quite easy to do with a micro button and LED,s on the receiver.You now need to set the output modulation on the 18MZ transmitter to 18channel Fasstest and link each receiver one by one. With plenty of channels available you can asign any channel to any function.I used one vacant input on each receiverfor battery input from my Powerbox sensor switch and a jumper double ended plug lead linking the two receivers so that both recievers would get power if one battery failed. I set the gyro gain to a 3 position switch with position one gyro off,pos two -70% and pos three to -90% on the ATV setting .The AVCSheading hold setting was not enabled.These ATV settings give about 50% and 85% gain on the Gyro.The servo limit trimmer pot on the gyro i set to 100% clockwise as this sets the gyro up for digital servos and acts as a fade out control on stick movement. I also reduced my aileron expo from 50% to 15% as you dont need as much expo when using a gyro.This all took a lot longer than I planned and what was i thought would be a couple of hour job last Saturday evening had me up to 1.00pm Sunday morning and i wasn't done yet.Up again at 5.00am to make final adjustments and then pack the car and off to JMA meet at Long Marston.I arrived knakered but one offDick S's sausage baps liberaly coated with ketchup and cup of coffee soon sorted me out. I was a bit nervous and tired before the first flight but i should not have been as allworked out fine.I took off with the gyro off and after a minute or so switched to low gain but could not really feel any effect so then went to high gain and again nothing dramatic just a more locked in smooth feeling to the model.Landing was perfect so I was pleased with this addition.I have yet to try more gain but the UF felt so nice to fly that i might just leave it as is.In conclution the twin receiver set up works very well and gives you plenty of channel inputs plus S-Bus if you need it and the gyro takes nothing away from the model flying pleasure just improves it.I would recommend all jet flyers to try a gyro on ailerons you might just like it.

Phil