limey
Senior Heliman
Location: Pittsburgh,PA
| Let me tell you how I have mine set up and that should give you a start.
All the servo travels are set to 100% The way the 401 gyro works and I am guessing is the same on the 240, is that the gyro sensitivity is on the gyro channel, channel 5, I currently have mine set to 70% but from reading other discussions on this board you should turn it down until you see the tail drift and then bring it up slightly.
The tail rotor endpoints (channel 4) dictate the speed of the tail rotor. I would try 70%, see how you like it. If it is too quick for you, turn it down, vice versa if too slow.
The elevator, pitch and alerion channels 1,2,6 should be set to 100% For my ATV's I have -60, -60, 40. The first two must match I believe. The thing to do is increase this number from the until the servo's are close to binding. Look at the top of the swashplate, if plate turns the main shaft the settings are too high. The 40 dictates the amount of collective the system has. 40 gives me 20 degrees, 10 on top and 10 on the bottom. I use the third hole of Futaba servo's.
I must iterate strongly how important it is to have all the servo's at 90 degrees, especially is CCPM mode. If they are not you will suffer interaction, eg, when moving forward, left, right, up, or down will be induced which is not what you want
My throttle curve in normal is something like 0 21 32 48 100 and in idle up one, 100, 62, 48, 62, 100 (taken from www.ronlund.com) My pitch curves are straight through 0, 25, 50, 75, 100
I have 30% expo and the machine is still very responsive. If you don't want this level of responsive, I would decrease the ATV's until you get to somewhere you like.
My pitch range in all modes is -10 to +10 and I am hovering at about 2/3 stick.
I would strongly suggest having your tutor fly it first and then between you, you should be able to work out what is suitable for you to start with.
A couple of things I would look at, the machine is ARF and not necessary assembled correctly, my swashplate was 45 degrees out of phase, so make sure this is not the case with yours.
The screws that hold the bellcranks in are crap, drill out behind this (only a couple of mm's till you go through the plastic and put nuts and bolts on).
The two links that are not fixed, shave a couple of mm's off the thread and and one mm off each of the links. This way you can get the desired pitch range. I would aim for -10 to +10 and 0 at center stick then you have the possibility of full travel and can elect whether to use it or not by setting up a pitch curve.
Hollar if you have any problems!
Best wishes,
Steve. |
