channel mixing

[pompeyjohn]

noob question this one...

What is the correct channel mix for CP, and FP?

I have got phoenix working with my DX6 as a 4 channel tx and I am having such a blast with the Yak30. But now I fancy giving some of them big heli's a go

[Ade_Law]

stick the dx6 in heli mode and use the JR profile in phoenix.

Ade

[Raptorite]

I am not that ofay with the DX6, but you will most likely find there are different modes for the different aircraft types. If you are happily flying fixed wings on the simulator, I suspect the transmitter is in ACRO mode. The transmitter will automatically mix the channels you need for heli use by setting it to HELI mode instead.

As a point of interest the mixings used for helis are the throttle and collective pitch are mixed to both operate on the left stick (assuming it is a mode 2, throttle left stick transmitter).

Once you have the transmitter in HELI mode you will find you are able to set things like throttle and pitch curves, these are used as the method of fine tuning the mixing of the two functions. For simulator use, it is best to leave them as default settings.

Cheers,
Pete.

[pompeyjohn]

thanks guys

I have got the tx in heli mode now. Should the collective pitch and engine throttle be at the same level? ie: when throttle is at 100, so is CP?

[Raptorite]

Yes, thats sort of the idea. What you do on a model is set the pitch up to the way you want it first, then match the amount of throttle you need to mantain a constant rotor head speed as the pitch increases or decreases at any given stick position.

An easier way of explaining it might be to think of the left stick as the pitch control and not the throttle. The throttle is merely there to allow you to set enough throttle to maintain the head speed and any given pitch. Obviously the more pitch, the more drag on the rotor head and therefore the more throttle you need to keep the blades turning at the same speed, similarly,the less pitch you have, the less drag on the rotor head (sometimes known as unloading the head) and therefore the less throttle you need to maintain the same head speed.

It can get a little complicated from here, but the reason why there are functions like idle up, each one of which (there are 2) have their own unique pitch and throttle curves is the method that enables a model to fly inverted, as this uses neagtive pitch instead. This in turn means that to make the model climb at full speed inverted, the left stick is right at the bottom. Normally the model would just be ticking over on the ground with the left stick at the bottom, so we need a way of having a separate function to allow us to have both tickover and full throttle at bottom stick. This is what Idle ups are for.

I hope I havent confused you too much and you have an idea of how throttle and pitch curves and idle ups work together.

Cheers,
Pete.