Shikra's blog View Details
Archive for July, 2010
Posted by Shikra | Jul 26, 2010 @ 08:19 AM | 29,385 Views
So this question comes up frequently - to use a Head Tracker or not. Jury is out, but a recent survey indicated that most people don't.
I can only say - do what suits you - but give both methods a proper try....

Which type:
There are various methods used - magnetic or gyro based being the most common. Each has its advantages and disadvantages.
I have used both types and I prefer the zero drift of the magnetic ones over the gyro based units - and happy to accept the downside of having to face in one direction.
You might have to try both types to see which suits you.

How it works:
Headtracker connects into the trainer port of a tx that supports advanced features such as setting which channels on the trainer port are passed through to the plane, and which ones are ignored. When the trainer switch is in one position, the headtrackers signals are disabled and the controls on the tx control the pan/tilt on the plane . In the other position, the headtracker controls the 2 channels programmed into the tx

Hardware modification for TX:
I have modified the trainer switch on a Futaba 9c so that it is not spring loaded. To do this, I replaced the existing trainer switch with a replacement "Futaba 2 position long tx switch" available from many sources such as ebay. DO NOT get the sprung loaded version!
This enables you to toggle the headtracker on/off at any time.
Alternatively you can use the cheaper rubber band method if not concerned about turning the...Continue Reading
Posted by Shikra | Jul 16, 2010 @ 05:38 AM | 27,649 Views
Quick settings if you understand and don't want to read on:
Swash AFR : Ail +30, Ele -30, PIT +100 ( or may need to change the + - sign to reverese according to your setup )
Pitch Curve mix : 0 40 55 70 85
Throttle curve mix: 10 10 1010 10 (or 90 90 90 90 90 if needs to be reversed for Gyro Rate mode)
Gyro: 20 20 (or 80 80 if needs to be reversed )

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Understanding the TriCopter TX settings in a Futaba 9c - particulalry for non Heli Pilots!!

I wrote this as I am not a heli pilot and needed to understand and figure it out for myself! Writing it down helped. And maybe it will help some others. And your probably starting out too which is whay you are reading this.
It's not difficult, but can take some time to understand and for it to "click in to place". It will eventually.

The Tri uses a 120 degree swash plate setup to control the motors and hence pan / tilt and climb/descent. The yaw/rudder control is more traditional, but is contolled by tilting one of the motors. Simple and clever. You don't need to know how swash plates work, but it does help. Explanantions are out there on the web - although if you build a Tri, you will probably figure it out yourself once you understand the settings.

Programming the TX - Starting point
A Heli model on the tx with default Futaba settings.
Select model type of Heli - SR-3

Swash AFR settings
This is the amount of control and direction...Continue Reading