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Regular servo on retract channel?

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Old 11-21-2010, 08:44 PM
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badger5964
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Default Regular servo on retract channel?

I have a Futaba T6XAS 6 channel radio where channel five is the retract switch. I plan to use flaperons on this plane in additon to retract installation. I'm using the pneumatic Robart system. The throw on the air valve is only a 1/4". A retract servo is heavy, I have plenty of regular servos and with 180 degrees of travel on a retract servo this will make it difficult to get just a 1/4" of travel.

Can I use a regular servo on channel five?
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Old 11-21-2010, 09:14 PM
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Default RE: Regular servo on retract channel?


ORIGINAL: badger5964 I have a Futaba T6XAS 6 channel radio where channel five is the retract switch. I plan to use flaperons on this plane in additon to retract installation. I'm using the pneumatic Robart system. The throw on the air valve is only a 1/4". A retract servo is heavy, I have plenty of regular servos and with 180 degrees of travel on a retract servo this will make it difficult to get just a 1/4" of travel.
Can I use a regular servo on channel five?
Yes, but it will still rotate the normal full throw left/right as on/off.
However, there are Hitec small/medium sizeprogrammable digital servos that could be used with exact throw programmed into the servo itself.

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Old 11-21-2010, 10:04 PM
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Default RE: Regular servo on retract channel?

Yes, retract servos are for mechanical retract loads not throwing a little switch. Any basic servo should work.
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Old 11-21-2010, 10:06 PM
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Default RE: Regular servo on retract channel?

There are electronic retract valves that combine a solenoid valve and a circuit board. There is nothing to adjust as there is no servo involved. I have one that I used on one of my Jets. You just connect the air lines to it and plug it in to the Retract channel. I used to have it connected to my Futaba 9CAP. Channel 9 was Non-Proportional (just On/Off). Mine was from Minihobbies, but I believe there are others on the market. You could also use a Matchbox type device that allows you to set End Points, Neutral, and Servo Direction, if Ch6, on the T6XAS is Proportional. Futaba makes a Matchbox type device as well as JR.
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Old 11-21-2010, 10:06 PM
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Default RE: Regular servo on retract channel?

Why not end point adjust?
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Old 11-22-2010, 11:57 AM
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Default RE: Regular servo on retract channel?


ORIGINAL: JIMF14D

Why not end point adjust?
Exactly!

Use a standard servo to actuate the valve, and adjust the throw with the End Point Adjustment (Page 17 in Manual)
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Old 11-22-2010, 12:47 PM
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Default RE: Regular servo on retract channel?

Both suggestions are good, this is one retract setup where you can use endpoints. But I really like the suggestion for the electronic control valve for pneumatic retracts[8D]
Pete
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Old 11-22-2010, 01:16 PM
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Default RE: Regular servo on retract channel?

Electronic Valve - $109

Standard Servo - $10

The choice is yours
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Old 11-22-2010, 02:46 PM
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Default RE: Regular servo on retract channel?

As I said, I really like the electronics vale setup, but I'm also a bit too thrrrifty to spend that much on one
Yep, the servo will work fine and last a long time
Pete
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