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8FGS 2 levels of airbrake

Old 10-29-2013, 11:18 AM
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dbsonic
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Default 8FGS 2 levels of airbrake

Hi, I want to be able to assign airbrake to a 3 position switch and have the each position provide different amount of airbrake. Like this

position 1 = no airbrake
position 2 = 1/2 airbrake
position 3 = full airbrake.

How can I do this with the 8FGS? Any ideas?
Currently from what I can tell, it looks like airbrake is "full" or "none"

TIA,
Darren
Old 10-30-2013, 10:57 AM
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Krysta
 
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Hi Darren,

Make sure your Airbrake is set to a 3 position switch and is active. Then on the switch selection screen, set the On/Off position to the middle. If you set your rates here at 50% you can then go to a Pmix and set the Master as HW, select Switch C, and the Slave as Aileron. Set the rate to 100%, and at the top of page 2 again set the switch selection to Switch C, here you can go in and set the On/Off position of this switch to full down.

The should be what you are looking for.

Sincerely,Krysta
Product Development & Support Specialist
Futaba Service Center USA
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Old 11-03-2013, 10:24 PM
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dbsonic
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Hi Krysta, I had played around with that, but it does not seem that pmix together with airbrake is compatible no matter what I try. While the airbrake function works perfectly from position 1 to 2. When the pmix takes over from position 2 to 3, for some reason the travel goes full for about 1 second and then to the setting of choice as dictated by the curve programming of the pmix. Hopefully I am being clear. So, Instead of smooth transitions, it deflects the surfaces to maximum before settling to the desired position which is not good as you setup for landing the airplane This can be seen in the servo display of the transmitter so it should be simple for your engineers to repeat. Looks like some sort of SW timing issue or bug if you want to file it.

However, with airbrake inhibited, I have verified that the function can be done completely through pmix in fact with nice smooth transitions( w/o hitting the max deflections ) and all that one looses is the speed function of the airbrake. So that's probably good enough approach to getting a 3 position airbrake using about 3 pmixes to get the job done. The ultimate would be 3 position airbrake with speed control. oh well.
Darren

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