Last night I set up my SM Mig-29 With the Demon Cortex Gyro.

I've never used one of these but it looks like it will be fun and I'm looking forward to driving the Vectored Thrust Nozzles into it and playing with the Heading Hold mode in Hover.

Anyway I set it up using the PC Software to use it as Futaba S.Bus and the 18MZ Tx.

In all of my other models I use the S.Bus2 port on the bottom of the R7008SB Rx to drive the SBD-1 PWM Converters to drive the servos in excess of the 8 physical ports on the Rx.

It was working pretty well but I was getting Jumps and Jolts occasionally on the servos. Kind of glitchy I didn't feel it was right.

What I did to fix it was to change the mode of the Rx to mode 4 (you could also use mode 2) What this did was changed the phyical ports on the Rx 1-7 to Rc channels 9-15. The the 8th port became a dedicated S.Bus (not S.bus2) port. That was the output I used to feed the Cortex Gyro and everything was smooth as glass.

The S.Bus2 port is bi-directional. It sends information to the servos and in addition it receives data for telemetry sensors back to the Rx. I think the telemetry data was freaking the gyro out a little bit. The Manual states it supports S.Bus and doesn't mention S.Bus2.

So you give up one output port on the Rx (port 8) and convert it to a dedicated S.Bus port. But you gain 5 Output ports out of the Gyro (possibly 7 if you use the throttle and additional channel output).

I'm controlling 14 channels now with no SBD-1 converters. It worked out to be a nice simple installation.

Hopefully The weather will break and I can play with it this weekend!

Happy Flying!

Steve