RE: setting pitch
jason515,
V-curve setup? I hope you're talking about the throttle curve and not the pitch curve. If you have a V-curve for pitch, you'll end up with positive pitch at high stick, 0 pitch at center and positive pitch at low stick. You don't want to go inverted with that!
Let's start with normal mode and get to stunts later. I assume that your conversion included a different engine, exhaust, tail boom and blades? If so, you've got alot more power and longer blades to help "soak" up that power. You've added some weight, but not much. You should still be hovering at about the same pitch, and still be running about the same headspeed.
Start here:
Set your throttle AND pitch curves to the factory numbers in the normal flight mode. Now center the collective (throttle) stick and you'll be at 50% on both curves. Now adjust your linkages to get the main blades at 0 degrees and the carb. barrel half open (with the throttle linkage at 90 degrees to the throttle arm on the carb and 90 degrees to the servo arm). You also need to make sure the distance from the center of the carb. barrel to the ball link and the center of the servo output shaft to the ball link are equal.
Now you can move the stick to full up. Read the pitch gauge and adjust the pitch curve high position until the pitch reading is about +9. If the curve is set to 100% and you still are less than +9, check to see that the pitch servo ATV is 100% and that you have the ball link on the pitch servo at the correct distance from the center of the output shaft (further out=more throw).
Now go to full low stick. Read the pitch gauge and adjust the pitch curve low position until the gauge shows about -3 degrees.
Fill in the 1/4 and 3/4 stick positions in the pitch curve to get a linear curve. Example: if mid stick is 50% and high stick is 100%, 3/4 stick should be 75% or half way between.
Now for the throttle curve:
You've already got the linkage set properly, so we can start getting some values in the curve. Go to full up on the stick and you should be at 100% in the curve. Confirm that the carb. barrel is open all the way. Go to full down on the stick and confirm that the carb. barrel is closed. Adjust the servo ATV, or servo arm length accordingly to get full travel of the carb. barrel.
Now, at center stick you know that you have 0 pitch in the main blades which puts very little load on the engine. You're not gonna need to be at 50% throttle at center stick so set the throttle curve center stick position to about 30%. Move the stick to full low and adjust the throttle curve low stick position to a number that just has the carb. open a tiny bit (we're looking for a good idle here, but not enough to engage the clutch). Now, we can set the throttle curve high stick position to 100% for now, but you may need to lower that value after some flight testing. Fill in the 1/4 stick curve value for half-way between low and mid. Fill in the 3/4 stick curve value for half-way between mid and high.
Now you're normal mode is set for preliminary testing. You've got a pitch range of -3 to +9 and you'll be hovering at about 3/4 stick.
Try to get to this point and we'll try and fine-tune it later.
Ben