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Flap Actuator Motor Alternatives?

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tall_tech_teach(at)yahoo.
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Posted: Wed Feb 15, 2006 8:40 pm Post subject: Flap Actuator Motor Alternatives?

Being a penny pinching school teacher, I found the

price and weight for the spec'd flap actuator motor to

be too much. I scanned the archives and saw that a #25

linear actuator  motor was being proposed by a few

members. My question is this..... have they flown with

them yet? 25 lbs seems to be too small a force to

overcome the wind pressure on both flaps at Vfe or

below. How are other frugal builders actuating their

flaps? I have thought about using a "manual actuator"

(a lever with detents for 0-30 degrees), but I'm

building a dual stick version so it won't look like

the prototype that Zenith Air built in which the lever

was between the pilot's legs. I would love it to be

near the center arm rest, but I also need a console

and doubt that there will be space for both.

HELP!!!

Warmest Wishes in Olalla, WA

William Murray

tall_tech_teach(at)yahoo.com

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craig(at)craigandjean.com
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Posted: Wed Feb 15, 2006 9:51 pm Post subject: Flap Actuator Motor Alternatives?

Some have used electric windows motors. But I can't point to any specifics.

Certainly these day when many cars come equipped with electric windows you

stand a good chance of finding a bargain at a wrecking yard.



-- Craig 



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agustafson(at)chartermi.n
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Posted: Thu Feb 16, 2006 6:14 am Post subject: Flap Actuator Motor Alternatives?

I used a power seat motor from a Lincoln. One problem w/ these types of 

motors is that they use the same motor winding for both directions which 

presents an issue when you try to put a limit on the travel. If you put a 

cut out switch in the circuit, that switch also prevents reversing the 

motor, so won't work. If you rely on a physical stop, it is likely that the 

motor will bind and not reverse. Things to think about!

Aaron     do not archive

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Trainnut01(at)aol.com
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Posted: Thu Feb 16, 2006 7:08 am Post subject: Flap Actuator Motor Alternatives?

Aaron

Adding a couple of diodes to your limit switches will make that seat motor  

reversible. I used one to open a skylight in my shop that can not be easily  

reached.

Carroll Jernigan

XL

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nyterminat(at)aol.com
Guest

Posted: Thu Feb 16, 2006 1:05 pm Post subject: Flap Actuator Motor Alternatives?

Surplus supply has seat moters with acme screw actuators, some have suggested an automotive one from an outfit in California. It starts with an Fand ends in an I, I,m sorry I just traveled to Ghana so I don,t have my records with me. Check the archives. I used them, it was on sale for $99.00, used a 3 inch stroke but only need about 2 inch. I moved the limit switches to what stroke I needed. I have used it in my 701 and am quite pleased with it. They have 175 lb force and only takes a few seconds for full travel.

 

Bob Spudis

N701ZX   912S

 

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craig(at)craigandjean.com
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Posted: Thu Feb 16, 2006 1:29 pm Post subject: Flap Actuator Motor Alternatives?

The Zenith factory motor would have the same problem. See page 6-B-20 of the

plans ("Air Scoop Cabin FRESH AIR VENT FLAP CIRCUIT") for the wiring that

solves this problem.



-- Craig



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craig(at)craigandjean.com
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Posted: Thu Feb 16, 2006 1:44 pm Post subject: Flap Actuator Motor Alternatives?

Actually the circuit in the 601XL plans (6-B-20) does this with no diodes.

But it is not something I can describe in an e-mail. All that is needed is

the two SPST limit switches and a DPDT, (momentary-off-momentary) toggle

switch and some wire.



-- Craig



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rbutterfield(at)mebtel.ne
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Posted: Thu Feb 16, 2006 2:18 pm Post subject: Flap Actuator Motor Alternatives?

At 04:43 PM 2/16/06, you wrote:

 	  Quote: 	
		  



Actually the circuit in the 601XL plans (6-B-20) does this with no diodes.

But it is not something I can describe in an e-mail. All that is needed is

the two SPST limit switches and a DPDT, (momentary-off-momentary) toggle

switch and some wire.


	


Let me try to describe it (without looking at the drawings  )



The DPDT switch will connect separate wires for travel in either 

direction. The limit switch for that end of travel is put in the wire 

that is switched for travel in that direction.



So, when it reaches the end of it's travel in one way, the wires for 

driving the motor that direction are disconnected, but it can still 

be driven the other way.



 	  Quote: 	
		  


	


Regards,

RonB

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