Inverted in Phoenix

[Guest]

Hi,
I am enjoying crashing without cost in Phoenix and typically I am trying to run before I walk.

I am using the Blade CX2 controller and have configured and calibrated it.
The throttle complete from bottom to top causes 1 and 6 bars to move in the calibration. I read that only one bar should move for one movement of the stick - but two move, depending on the throttle stick direction, 1 will increase from middle and the other decrease and obviously vis versa. they do, and the advance calibration made no difference.

I ask as when I fly inverted and pull the throttle right down - it just does that - cuts the power. I thought inverted was about having a constant throttle and changing the pitch of the blades so the heli can go up and come down just as fast..

What am I missing here? and how can I correct it?

Cheers
Jack

[squeaky pete]

you need to set the idle up mate, havent set up on that tx tho so cldnt say how to, but its the idle upsetting in the tx settings

[Bauerjack]

I dont think it doesnt idle up AFAIK, thats was my main reason for getting the DX7 - theres no pitch curves settings for it...

I might be proved wrong though

[squeaky pete]

you cld be right, i think you can number assign it, so you use the keyboard to switch idle up on!! i think......

[Guest]

you cld be right, i think you can number assign it, so you use the keyboard to switch idle up on!! i think......

Done that...many thanks, Solved.

[squeaky pete]

no worries matey, happy flying

[heliTV]

Hi,
I am using the Blade CX2 controller and have configured and calibrated it.
The throttle complete from bottom to top causes 1 and 6 bars to move in the calibration. I read that only one bar should move for one movement of the stick - but two move, depending on the throttle stick direction, 1 will increase from middle and the other decrease and obviously vis versa. they do, and the advance calibration made no difference.

Hi Jack

The reason the throttle stick moves 2 bars is that it is controlling 2 functions on a CP heli. the first is the speed of the motor (throttle) and the second is collective pitch of the blades. As the stick is moved forwards, the pitch of the blades increases. Idle up effectively keeps the throttle more or less constant and usually the pitch curve is changed too so that centre stick is zero pitch max stick is full positive pitch and min stick is full negative pitch.

The up shot of all this is that when you're in idle up and flip the heli as you move the stick towards the minimum position negative pitch increases, but as the heli is upside down, it provides lift and the heli goes up.

If all this doesn't make sense then post again - it's getting late and probably time for bed!!!

All the best

Graham

[cjcj1949]

Phoenix does it for you.

I think you need to read the fine print on Phoenix. I think it says no more than two channels should change. That means one or two as two is not more than two but three is more than two.

To fly a CP heli you need six channels. Three cyclics, rotor speed and rotor pitch. The fifth channel is used the control gyro sense. By the way sense should read sensitivity and controls how the gyro behaves. The difficulty we have is that we only have four controls available from the tx, collective pitch and throttle have to share the left up down stick movement. The way it works is that we use a throttle curve to translate each left hand vertical stick position into a required throttle signal sent on channel 1 to the esc. The simplest throttle curve is a straight line giving the same throttle response as you would get in aircraft mode. ie 1 to1. Exactly the same method is used to get the collective output which is sent to the collective servo on channel 6. The simplest case is a straight line from -10 degrees at stick full down, 0 degrees at centre stick and +10 at stick full up. You need to have your tx set to these straight lines when you calibrate the tx on phoenix. After calibration you can change it to what you want.
When you use the so called idle up switch what happens is you are given two completely new curves or graphs that you can set on their own. Most people use this as a stunt mode. It allows you to fly upside down by allowing you to choose any value of throttle at full down on the left hand stick. Most people use maximum throttle at maximum negative collective.

This means that if you use a six channel tx the sim will allow the tx to work normally and you can switch between flight modes (one of which you can call idle up) from the tx and also use throttle hold to do motor off landings. (Autorotations).

You are using a five channel tx but the sim needs six channels so the sim itself has to translate your left hand stick vertical stick into four things.

throttle normal mode
throttle stunt or idleup mode

collective normal mode
collective stunt

It also needs to handle throttle hold.

The only way it can do this is to use keys to replace the normal heli tx switches.