Basic 3D Set-Up
Lets Recap on Part I of this article:-
 
Here is the order in which you will have to set up your helicopter:-
1. Reverse Servos
2. Check and set up a pitch window mechanically.
3. Centre your pitch servo and set up control throws to match your pitch window and lengthen or
shorten pitch linkage so ½ your pitch window has the servo arm centred.
4. Test hover.
5. Set up your Normal mode or hover mode pitch program.
6. Set up  your normal mode hover throttle program.
7. Set up your Stunt Mode Pitch program.
8. Set up your Stunt mode Throttle program.
9. Stunt Mode trim settings.
10. Set up a Throttle Hold mode.
 
 
And we got to the 7th step, Setting up a stunt mode.
 
Setting up Stunt Mode Pitch Program.
7.   Copy your full throttle pitch percentage through to your new stunt mode at the full throttle position.  
That just about covers the pitch setting, as you can see not a lot to it. When you fly off and you switch into stunt mode if done at full throttle like you should, nothing should change but your stunt trim which I will talk about later.
 
Setting up a Throttle Stunt Mode curve.
8.   Make up a V curve for your stunt mode throttle program by setting both ends of throttle curve to 100 percent and the centre depending on the model between 50-70 percent. Smaller engines usually require higher percentages in the centre to keep the revs up high enough in a roll. If you find your model dropping revs during a roll bring up the centre of v curve up or try adding an aileron to throttle mix, this can be handy if you find the revs during a loop a little to high.
 
 

Setting the stunt trim
 9.   Setting the stunt trim is an easy function on a digital trimmed radio, but not so easy on a radio with
normal trim pots beside the gimbals. Making sure that first your radio has stunt mode first by reading your instructions that came with your radio. Some older type computer Helicopter radios didn't have this function eg. JR 347 radios.
 
Whist in full forward flight your helicopter in its hover mode will have a tendency to pitch its nose or roll one way or the other, depending on which way you trimmed your model. If you have trimmed for a cross wind hover then your model will roll  once it is flying down wind the way that it was trimmed to go. Then once back in the hover it will handle quite the same as it did before you left. To eleviate this problem the radio manufactures added a stunt trim, so the helicopter can be trimmed for both forward flight and hovering. To set it with a normally trimmed model you will have to fly the model flick it into stunt mode see which the model pitches rolls or yaws whilst flying downwind. Then flick it back to normal or hover mode and land. Set the stunt trim program which may have to be Uninhibited to be activated (see your radio's instruction booklet), then go up again and retest. It is a real trial and error thing and you will find that even when perfect on a certain day that the next time that you venture out you will be setting it again on your first flight.
 
Set up a Throttle Hold mode.
Now in the first instalment we mentioned setting your mechanical pitch to the top of your pitch window and setting your pitch slider so it travels to this limit without binding. Well now we are going to use it.

 
Tips for beginners to Autorotations.