Author Topic: Speed brake  (Read 2414 times)

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Offline rglos

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Speed brake
« on: March 02, 2007, 01:02:28 PM »
I have a couple of questions to those who use the electric speed brakes.

How fast are they to deploy? 1 second, 2, 3 or more?

How much force is needed to push the speed brake down.

I am looking at some linear motors.

There is a speedbrake kit out there, but the price is close to $500.

A 4" stroke linear motor can be had for $120 w/limit switches but the time and force needs to be reconciled.
Long EZ, 0-235L2C, 1986

Offline Waiter

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Speed brake
« Reply #1 on: March 02, 2007, 04:10:29 PM »
rglos;

I have the unit offered by Ken Miller. It takes about  8 to 10 seconds to extend or retract.  

I'm not sure about the amount of force required, the linear actuator he uses is more than adequate to handle it.

I have my landing gear hydraulic pump removed right now, when I get it reinstalled this weekend, I'll do a short video of the gear and speed brake retracting. When I select "EMERGENCY RETRACT" my controller commands the main gear, nose gear, and speed brake to all retract.

Waiter
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