6exhp Futaba radio

I like to ask how can I set up this radio to have motor and pitch control to work together? Instructions do not make sence to me. Thank You. Motor high increase the pitch, You know....

[chaos]

By now you might have figured it out or got some help. I'll ramble anyway cuz I'm old and that's what old folks do.

This throttle and pitch "curve" business is kinda confusing at first. The bottom line of it all is that the throttle stick actually controls 2 servos, one to control the engine and one to control the collective pitch. The engine servo should do whatever it takes to keep the engine running at a fixed constant rpm regardless of the load (pitch) on the main blades. The collective servo should control the collective pitch... who would have guessed. So the throttle stick could better be called the collective stick. Or maybe the "both stick".

But really, what the throttle stick does is to select a point on a "curve", a point for pitch and a point for throttle. Generally there are 5 points for each. They're generally numbered from 1 to 5. Point #1 is selected when the throttle stick is at the low end. Point #2 is selected when the throttle stick is 1/4 of the way up... and so on... point #5 is selected when the throttle stick is full up. If point #3 is selected, for example (half stick) then that same point is selected on the pitch curve and also on the throttle (power) curve.

What does selecting a point do? You can adjust the value of any of the 5 points from 0% to 100%. At 0% the servo arm is all the way one way (and you can control the limit of it with the end point adjustment), and at 100% the servo arm is all the way the other way (and again the end point can be adjusted). A value of 50% puts the servo arm in the center of its range of motion. Since the throttle stick by itself is only selecting one of those 5 points, you can see that the throttle stick position by iteself doesn't really tell us what's going on with the power or pitch. It only selects a point. The selected point has to be adjusted to get the control (pitch or power) to do what you want.

Just for a number, suppose the manual for your heli indicates that it will hover at 6 degrees pitch on the main rotor. And suppose you would like for it to hover at half stick. That's a good starting place because that gives you a whole half stick movement to go from hover to max pitch. That's less sensitive than hovering at 3/4 stick, which is more popular for fancy flying; since you only have to move the stick 1/4 more to go full blast.

Given that requirement, you would adjust the value of point #3, which corresponds to half stick, to whatever it takes to get the 6 degrees of main blade pitch. If point #5 (full stick) is set to 100%, which is probably the default value, then the end point needs to be adjusted so that you end up with max pitch... not binding the servo. To be able to autorotate you need to adjust the low stick value (point #0) to give you something like -3 degrees of pitch on the blades. Point #2 would be set halfway between #0 and #3, and point #4 would be halfway between #3 and #5. For starters. You might want to flatten that out a bit around point #3 (increase #2 a little and decrease #4 a little).

I think it's best to set the mechanics of the heli up for 3D and then use the curves to tame it down.

[mrmuffinmanvw]

Originally Posted by Johny

I like to ask how can I set up this radio to have motor and pitch control to work together? Instructions do not make sence to me. Thank You. Motor high increase the pitch, You know....

On the 6exhp what you are looking for is the swash adjustment there are two the first one is for a standard swash the second one is for ccpm setup. If you set this first for what kind of swash you have the rest will fall into place using standard curves. Hope that made sense to you I have 5 heli's programed onto mine.

[hawkman]

Its eCCPM you are after...CCPM means that the whole swashplate moves up and down via one servo.....the roll and pitch mixing is done by rods going to thier respective servos.....eCCPM means that there are 3 servos linked to the swashplate....they move together for the collective...ie swashplate going up/down but the servos then act differently for roll and pitch....as well as collective inputs....all clever stuff..

Now......

You might want a basic setup....so the throttle servo will go into output 3 (possibly) and the collective servo will go from output 5 (I think)

but if you are eCCPM then the three swashplate servos will hook up to their respective collective,pitch and roll outputs...but you will need to enter the sub menu on your radio to set this up.......

Dont go further........tell us what heli you have....and do you have the radio manual around?

R