Originally Posted by gregg f (Post 11901858)

Check to see if the tray it's mounted on is level or if the front is slightly higher. I've had one install that had an issue of elev coupling on roll. Turned out my tray was lower in the front than back to the thrust line. Made a wedge to put the gyro level and problem was solved.

Originally Posted by ravill (Post 11902870)

I just purchased one from Todd at dreamworks.

I'll be placing it on my F-4 which I unfortunately hurt this last week.

Question:

The airplane has to be trimmed BEFORE applying the gyro?

Originally Posted by mr_matt (Post 11902963)

Hi

Sorry if these are answered, I tried to research the thread.

1.) Are all of the servo power leads going through the little box? Does the power bus in the gyro have a current rating?

2.) If a plane has a conditional mix, like flap to elevator, how does that work? Say you had down elevator mixed to flap extension. I thought the gyro would see the down elevator input as a rate command and the plane would keep slowly drifting downward in pitch?

Thanks very much...

BTW, I just came from Best in the West......I think there were a LOT of these flying......

Originally Posted by siclick33 (Post 11903274)

2) The response of the gyro (at least in normal mode) is simply to correct a disturbance; it doesn't try to hold a 'rate'. Presumably in your conditional mix example the mix is there to prevent a pitch change; therefore the gyro will do very little (if anything) other than to continue to smooth out the flightpath. Also, I would guess that in most cases the amount of elevator mix in your example would be small enough to be irrelevant (in the same way that the effects of trimming the model can largely be ignored).

Originally Posted by siclick33 (Post 11903315)

The way that I understand it is that there is no rate 'command'.

By moving your control stick you don't ask the gyro to give you a rate of movement, the signal is (simplistically) passed straight through the gyro to move the control surface. The gyro simply responds to any disturbance of the model and 'alters' this signal to provide a correction to smooth down the flightpath (in normal/rate mode).

Originally Posted by siclick33 (Post 11903399)

Normal mode on the Cortex is what other manufacturers call rate mode and yes, it does have it. Normal/rate mode is the 'basic' mode that dampens out disturbances.

Originally Posted by wfield0455 (Post 11903412)

Simply give it enough aileron to start it rolling at the desired rate, hold that input and the Cortex appears to take care of the rest. It seems to very effectively maintain a constant rate of change, for each axis based on stick input.

Originally Posted by mr_matt (Post 11903477)

OK I am confused, if that is what it does, that is what I was referring to as a "rate" mode. Meaning a deflection angle of the stick does not directly correlate to a deflection angle of a surface, but rather the deflection angle of the stick corresponds to a desired rotation rate around that axis (and the gyro takes care of any wind effect, turning, coupling etc)

So that is what my original question was. If you have a elevator compensation mix in for flaps, the gyro can't distinguish that from a down elevator rate command. Maybe you don't need these kind of compensation mixes in the first place with the rate mode.

Originally Posted by Max2011 (Post 11906354)

Seems to me you could program different gains....different than the "normal"(amber light) onto the HH(red light) if you do not intend on using HH. Still you would need to use the computer to make indiviual changes but you could use the 3-position switch to see the difference in the normal setting and your new gain settings.

Originally Posted by mort78 (Post 11876288)

Hi Airforce7,
To setup the gyro, make sure your TX is completely ready to fly the model with the correct travel etc. Turn Dual rates off.....

Then to teach the gyro, you need to do the following....
1. Turn everything off
2. Place jumper into gyro
3. Then turn on your transmitter with neutral sticks and dual rates OFF.
4. Turn on your model.
5. This is where you need to be quick.... the LED will cycle through the various controls. For you, the gyro light sequence will be....

2 x RED blinks (Do nothing)
2 x GREEN blinks (Right Aileron)
1 x GREEN blink (Left Aileron)
2 x GREEN blinks (Aileron Neutral, Elevator Push - Down)
1 x GREEN blink (Aileron Neutral, Elevator Pull - Up)
2 x GREEN blinks (Aileron + Elevator Neutral, Rudder Right)
1 x GREEN blink (Aileron + Elevator Neutral, Rudder Left)

When the system blinks fast continously, Pull the jumper out and power the model down. The above step happens fast, so you need to be aware of which input to give beforehand, otherwise you'll put in a wrong input or miss it altogether, as the gyro doesn't wait for you.
I remember having to do this a couple times before I got it done right. Remember, the gyro 'learns' your end points AND stick position during the above sequence - ie: During the time the jumper is in the gyro.

Regards,
Mort

Originally Posted by Max2011 (Post 11928158)

O.K. here is one for you guys.
I set my Cortex to use the Bank one amber light as the default...the red light is off of course. On the Bank two...green light.... I programmed it to only use rudder control only. When I go to Bank one(amber) everything is great ....Off at red works....BUT when I switch to Bank two(green) the rudder will creep over to the right side and stay there until I turn off the Bank two by going to red or amber. I wanted to fly some maneuvers in the heading hold using rudder only but the rudder does this little trick.....any idea?