RAK402
Key Veteran
Location: Alhambra, CA
My Posts This: Topic Forum | frischi,
Venom has been very good regarding advice and suppport. There is a very, very long thread on RC Groups forum on the VNR3D.
You are after a ship that hovers "hands off" at about three feet off the ground (i.e. out of ground effect. The problem here is that, at this stage of the game, it is dangerous to the helicopter to get it this high up. Is there anyone who can trim it out for you?
Also, are you using training gear (a necessity).
The instructions are not very good with regard to how the pitch/throttle mixing works.
This may help:
In "Normal" mode, the collective pitch should move from half throttle stick to full throttle stick. From low throttle stick to 1/2 throttle, there will be no collective movment. the main rotor blades should be at zero pitch or thereabouts until you move beyond 1/2 stick. Above 1/2 stick the blades should go positive.
When you flip the to 3D position, the lower end (i.e. zero to negative) becomes available. The throttle also will not go below 1/2 in 3D mode and will increase from 1/2 throttle as you move the throttle/collective stick up or down.
The PLT knob controls the total pitch range. The PIT knob controls the rate at which the pitch is mixed in vs throttle. Changing PIT actually displaces the entire pitch setting, relative to throttle, without changing the overall pitch range.
If you have a total pitch range of 18 degrees with the PIT set so that you have zero degrees of pitch at 1/2 stick, you should have +9 at full throttle and -9 at low throttle (again, in 3D mode). If you tweak the PIT knob to add two degrees of pitch at 1/2 throttle, without changing the PLT knob, you will end up with +11 at full throttle/collective stick and -7 at low stick.
As you change one knob, you usually have to adjust the other. The goal being relatively constant main rotor RPM.
Neither of the knobs has any effect unless DIP switch #8 on the back of the transmitter is moved to the "Unlock" position. Once you unlock it, the factory settings are lost.
This is an entirely different approach to electronic pitch mixing than I have ever seen. It is found on Exceed, Venom, and Walkera. It works well and is pretty easy to set up, but it is just different. |
