Originally Posted by rcjets_63

twhite6728,

If I'm understanding you correctly, after programming your Cortex per the "normal" sequence (right aileron then left, down elevator then up, right rudder then left, then remove jumper plug), the gyro applies corrections in the correct direction for ailerons, but in the incorrect direction for elevator, rudder, and steering. Please confirm that I have understood your post correctly.



Is the gyro installed in the "default" orientation? This is upright (Demon head up towards top of plane, connector ports closest to the front of the plane. Has the gyro been set (using the computer) to the default orientation or another orientation?

I have previously installed a Cortex in a plane where it was not practical to orient the Cortex per the default orientation. This is common in a WWII fighter like a P-51 where the wing is bolted to the underside of the fuselage. Typically the builder would install the servos and Cortex inverted (output arm of servos and Demon logo facing the bottom of the fuselage for easier installation and maintenance. This is perfectly acceptable, but you have to tell the gyro that it isn't installed per the default orientation. Telling the gyro can be done two ways:
1) Alter the programming sequence - per the orientation in my example, you would do right aileron then left, up elevator then down, and left rudder then right; or
2) Connect the gyro to a computer and select the orientation buttons for the orientation you've installed the gyro.

Personally, I always do 2) since it only has to be done once. That way if I ever have to re-teach the gyro (such as at the field) I always follow the normal sequence and don't have to remember which sequence to reverse.

As always, after teaching, check that the surfaces move the correct way in response to any disturbances. I do this by temporarily turning the gain to -100% (which increases the deflection to make it easier to see. Then I quickly raise the right wingtip and check if the right aileron initially moves upwards, then raise the left wingtip (left aileron initially goes upward), then quickly raise the tail (elevator initially moves upward), then push the tail to the right (rudder initially moves to the right).

If you are continuing to have a problem, let's discuss it over the phone as that will likely get things sorted out faster. If you want to talk, PM me your phone number and I'll give you a call.

Regards,

Jim