Gyro in a 90mm EDF

[KenS999]

I would like to install a gyro in a 90mm EDF with the sole purpose to help stabilize in slower approach landings in crosswinds. The issue I have is a Dx6 G2 so only 6 channels with all 6 channels already being used. Has anyone successfully mixed gyro on/off with the retract or flap switch... so the gyro is activated when one of those channels is deployed. More importantly is it safe to do so?
Thanks,
Ken

[xviper]

Putting a gyro in a 90mm EDF should be no different than putting one in any electric plane, big or small, prop or EDF. We've been getting a lot of gusty cross winds here lately and my 90mm F-22, 90mm Yak130 and Viper 90 are much more stable than smaller planes in crosswinds, however, a gyro still helps when landing. Keep in mind that once you approach stall speed (just before touchdown), gyro compensation won't be very effective anyway.
Putting the gyro Y'd to either gear or flap should be no problem so long as you can set it up for gyro ON when gear is down or when landing flaps are used. It just needs to see the appropriate signal. Since you are going to use the gyro exclusively for landing, you'll likely dial in a bit more gain for a slower moving airplane. That being the case, you have to make sure you don't deploy gear or flaps at too high a speed or you'll get an alarming oscillation. Some trial and error flights to set the proper gain will be required, but you'll have to do this anyway since you don't have enough channels for a master gain (usually ch. 8, Spektrum).

[stojakovic]

you can misc control with landing gear.

[xviper]

With only 6 channels, the gyro has to be Y'd to an existing channel like the gear. In a Spektrum TX, gear signal goes from -100 to +100. Which one is gear "down" depends on the type of retract on the plane. Whatever gear down is on the switch, this must also be the same signal that will turn ON the gyro. If it's not, the possibilities are slim to none.
"Mixing" involves one channel telling another channel what to do. If there are no spare channels available, "mixing" is not possible. It's not as clear cut as some may think.
Y'ing to flap can be done IF the end points are -100 to +100, with full flaps being the same signal as what the gyro needs. Eflite planes tend to be more in tune with these signal numbers. Not so with other brands of planes as flap "zero'ing" and full flaps may not coincide with what the gyro needs to see to activate. It's not as simple or as clear cut as just saying you can do it. Sure, you can do almost anything but given the limitations of no extra channels and an older TX model, can you really?
In such a case, it may be more convenient and more applicable to just have the gyro ON all the time. Most gyros will default to this when it is not connected to a switch. You'll do the same "trial and error" fiddling to get just the right gyro gain that will work at all speed ranges the plane goes through.

[KenS999]

Thank you everyone for the constructive input. Ken

[xviper]

you can misc control with landing gear.

If you know this is do-able given his limitation of the DX6 and no spare channels, you should outline exactly how he can do it - the "mixing" that is. That's what he wants to know - not just that it can be done but HOW he can do it.

[Alphonso]

On most of my planes, I don't use the switch option. It is simply on all the time with no extra channels needed. Start off with low gain, increase a little every flight until you get oscillation at high speed and back it off. I usually only connect aileron too unless I'm using the SBUS facility. My SU27 gyro is mounted in the rear esc space and it allows me to run tailerons, rudders and throttles up to the nose with one extension.