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Old 10-13-2006, 10:11 PM   #1
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mechanical retract

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when i buy a set of trike mechancial retracts there is a way to get it to rotate with rudder for steering on the ground right?

just looking at the pictures of them i have no idea how it would work but i am sure there has to be a way to set it up...

thanks in advance for any advice

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Andrew Armstrong
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Funtana S .40
Great Planes Spitfire 40
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Old 10-14-2006, 04:44 AM   #2
Don M.

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Yes Sir there sure is. The steering pushrod is attached to a clevis that slides up and down on the retract allowing you to steer when it is extended.

I have had both air & mechanical retract systems and although the mech. are harder to set up, once they are I find them a lot LESS work than the air IMHO.
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Old 10-15-2006, 07:24 AM   #3
michel gravelle
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I wish to join this thread .

I have just ordered a Carl Goldberg Tiger 60 with retracts . I have down loaded the plans of the plane and the retracts and I have noticed that there are two servos for the retracts , and reading this thread are you telling me that I cann t steer the plane with tri-gear . This will be my first plane with retracts and with air at that . Question 1 , can I steer the plane with tri-gear ? Question 2 , what the hect is the second servo for ?

Please remember that this is my first plane with retracts and am totaly green

Michel ( Mike )
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Old 10-15-2006, 09:22 AM   #4
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A typical pneumatic (air) tricycle retractable gear set up will use one servo to operate an air valve to raise and lower the gear, and a second servo to stear the nose gear. Airplanes with stearable retactable nose gear typically do not use the rudder servo to stear.

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Old 10-15-2006, 01:38 PM   #5
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Some of them use the rudder servo and usually off the other side of the servo arm. This is on the smaller 40 size where room is a problem. Usually it is a cable to the nose gear but as I don't like stripping gears I make my own servo saver. I mount a compression spring in a break in the cable and hook the cable to each end of the spring and solder. I put a small washer on the ends so they don't come out of the spring. It is flimzy but I don't strip gears. If the nose gear has 2 takeoffs for the steering arm then I use 2 springs in tension with 2 cables.
Do not want to start anything but most of the trainer types and a lot of Sig airframes use only the one servo. More high performance use a separate servo as the landing speeds are a little heavy when touching down.
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Old 10-15-2006, 06:19 PM   #6
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A lot of times the linkage and servo installation are much easier by going with 2 separate servos. In the larger planes, the rudder servo is in the tail anyways...

The sooner you fall behind, the more time you will have to catch up.
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