Help in Autorotation: XTR and 9Z

[regiepogi]

Hi everyone! I'm running XTR 5.02 for sometime now. I've set it up on my 9Z. Now I feel the need to study autorotation. On the XTR, I have assigned autorotation chanel the same as the the throttle and pitch chanel which is chanel 3. When I flip the switch for throttle hold on my 9Z, the model on the sim cuts out the engine to idle but at the same time I can't control my pitch. Even if the pitch curves on my hold condition is almost linear. I am pretty sure I am missing something here. I will appreciate any help here. Thanks!

[Gary JP4]

Hi Regiepogi, I don't know if you ever figured this out but you might want to check this out. http://www.helifreak.com/showthread.php?t=49172&highlight=auto

There are basically two ways to set up the radio for Reflex. One lets the sim mix throttle and collective and assigns a channel for autorotation and is the fast way to get going but is probably what is causing you problems. The other way lets your radio do the mixing and is kind of like the real model. However, the sim can't handle CCPM swash mixing. You want the radio in helicopter mode with no swash mixing. On my DX6 that I use on the sim it is (as shown below) "Swash Type - Normal, 1 servo". The radio will mix throttle and collective pitch but the aileron and elevator outputs will be like an airplane.

Excerpts from the post referenced above: ........................

Then on the Sim, in the F5 box "Model Parameters Helicopter" uncheck the box "RPM controlling (governor)" and make sure the box is checked for Transmitter mixing pitch -> throttle. Also check the box for tail rotor active on auto-rotation. Now your radio will mix the throttle and collective and you can start working with autos and fine tune them a little easier and more like you would with the model.

Then you can play around with the F11 parameters to set inertia.

Keep in mind that during an auto-rotation from any altitude more then a few feet you need to immediately go to partial down collective to get somewhere around -3 degrees to keep the rotor spinning or you won't have enough energy when you get close to the ground. It also helps to have some forward speed with a slight pitch nose down in the decent.

You can go in under the simulation menu, model parameters, or F6 and click a box called data display. If you do this and also under Simulation, Display Mode during Simulation, and pick (check) window you will get a bar with data like head speed, blade pitch, altitude, etc. The bar won’t show until you start simulation, F4. This is useful for setting things up.


Also, note that you can save and recover models with their parameters under the model menu, and separately save and read radio channel assignments under the radio menu.


Here are my channel assignments under the Radio menu, Assign Channels, or F7.

Tail Rotor - 4
Elevator - 3
Aileron - 2
Pitch - 6
Autorotation - Blank
Gyro Sensibility - 5

Airplane stuff doesn't matter unless you are flying airplanes

General:

Throttle - 1
Landing Gear - 5

Here are my radio settings for the JR 6102:

I set up another model for the sim and gave it a name.
Model type Helicopter
Trainer - Normal
Switch Sel - Gear Aile D/R; FL-M Left SW
Swash Type - Normal, 1 servo

Servo Reversing - I have all servos normal except Ail & Rud which are reversed
Sub Trim - All 0
Travel Adjustment all 100% except Gear + 87% and - 87%
Throttle Cut I have to -112 (I don't know if it needs to be that far, I think I did it when I had the same problem as you.

Throttle Normal = 0, 49, 78, 90, 100
Throttle Stunt = 100, 100, 100, 100, 100
Pitch Normal = 34, 44, 50, 75, 100
Pitch Stunt = 0, 25, 50, 75, 100
Pitch Hold = 0, 25, 50, 75, 100

Revo and all mixes 0

Hope that helps.