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Flaps Travel

 
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ding(at)tbscc.com
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PostPosted: Thu Jun 19, 2008 3:54 pm    Post subject: Flaps Travel Reply with quote
Boys & Girls,
I've looked through the archives, and found only a little on this, though I think I remember previous discussion. Given the stroke of the flap motor (Feb. 2006 kit), I can only achieve 20 to 22 degrees travel with the linkage in it's most geometrically optimized position. I could gain maybe 2 degrees more by drilling a new (lower) hole in the torque tube arms. So ---- Is this sufficient for all purposes, including perhaps a steep approach for an off airport landing? Have others had the same outcome? Comments please.
Lynn Dingfelder Corry, PA
601 XL / Corvair Complete except for paint ding(at)tbscc.com (ding(at)tbscc.com)
[quote][b]

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craig(at)craigandjean.com
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PostPosted: Thu Jun 19, 2008 4:06 pm    Post subject: Flaps Travel Reply with quote
I don’t know about how much travel is needed. But if you have the old factory actuator with the exposed and adjustable limit switches, wouldn’t it be easier to move one of the limits switches instead of drilling a new hole?

-- Craig

From: owner-zenith-list-server(at)matronics.com [mailto:owner-zenith-list-server(at)matronics.com] On Behalf Of dingfelder
Sent: Thursday, June 19, 2008 5:50 PM
To: zenith-list(at)matronics.com
Subject: Flaps Travel



Boys & Girls,

  I've looked through the archives, and found only a little on this, though I think I remember previous discussion. Given the stroke of the flap motor (Feb. 2006 kit), I can only achieve 20 to 22 degrees travel with the linkage in it's most geometrically optimized position. I could gain maybe 2 degrees more by drilling a new (lower) hole in the torque tube arms. So ---- Is this sufficient for all purposes, including perhaps a steep approach for an off airport landing? Have others had the same outcome? Comments please.

  Lynn Dingfelder Corry, PA

  601 XL / Corvair Complete except for paint ding(at)tbscc.com (ding(at)tbscc.com)
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amyvega2005(at)earthlink.
Guest
PostPosted: Thu Jun 19, 2008 4:20 pm    Post subject: Flaps Travel Reply with quote
dont redrill or redo. the flaps are more than adequate at 20 degrees. just make sure they are even and lock in place in the up position.

Juan

--

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Jaybannist(at)cs.com
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PostPosted: Thu Jun 19, 2008 4:34 pm    Post subject: Flaps Travel Reply with quote
Lynn,

I've had a problem with flap travel, also. Part of my problem is total flap deflection. I talked with Caleb at ZAC, and he told me that the recommended deflection had been reduced from 30 deg. to 20 degrees. I can get 20 degrees.

My other problem is that with the travel I have, I can't get the limit switches close enough together to be able to trip both of them with the traveling "donut" on the actuator spiral. I have temporarily set the "down" limit and will eyeball the up position of the flaps.

Long term, I am going to add an extension to the bellcrank arm. It will be a one inch extension at an angle of 30 degrees up from the centerline of the bellcrank arm. I think that will give me the travel I need to get adequate separation of the limit switches.
Jay in Dallas CH 601XL N2630J "Lil Bruiser"

"dingfelder" <ding(at)tbscc.com> wrote:

Quote:
Boys & Girls,
I've looked through the archives, and found only a little on this, though I think I remember previous discussion. Given the stroke of the flap motor (Feb. 2006 kit), I can only achieve 20 to 22 degrees travel with the linkage in it's most geometrically optimized position. I could gain maybe 2 degrees more by drilling a new (lower) hole in the torque tube arms. So ---- Is this sufficient for all purposes, including perhaps a steep approach for an off airport landing? Have others had the same outcome? Comments please.
Lynn Dingfelder Corry, PA
601 XL / Corvair Complete except for paint ding(at)tbscc.com



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psm(at)att.net
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PostPosted: Thu Jun 19, 2008 4:45 pm    Post subject: Flaps Travel Reply with quote
Hi Lynn,

My flaps go around 30 degrees. I have the older flap motor, while you have the newer one.

I don't know how the difference plays into performance. My plane hasn't flown yet. I suspect 10 or 20 degrees of flaps is all that would be helpful for short takeoff, and for landing you can always use a forward slip instead of (or along with?) flaps to produce a steep glide angle.

Have fun,

Paul
XL - getting close



At 04:50 PM 6/19/2008, you wrote:
[quote]Boys & Girls,
I've looked through the archives, and found only a little on this, though I think I remember previous discussion. Given the stroke of the flap motor (Feb. 2006 kit), I can only achieve 20 to 22 degrees travel with the linkage in it's most geometrically optimized position. I could gain maybe 2 degrees more by drilling a new (lower) hole in the torque tube arms. So ---- Is this sufficient for all purposes, including perhaps a steep approach for an off airport landing? Have others had the same outcome? Comments please.
Lynn Dingfelder Corry, PA
601 XL / Corvair Complete except for paint ding(at)tbscc.com (ding(at)tbscc.com)

Quote:

[/b]
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ding(at)tbscc.com
Guest
PostPosted: Thu Jun 19, 2008 4:47 pm    Post subject: Flaps Travel Reply with quote
Craig,
What I'm saying is there is not enough stroke in the flap motor mechanism. The limit swiches are not a factor in this. Even if there were more travel available, the rear frame channell (6B5-2) would be in the way, and prevent much further travel downward.
Lynn 601 XL
   
I don’t know about how much travel is needed. But if you have the old factory actuator with the exposed and adjustable limit switches, wouldn’t it be easier to move one of the limits switches instead of drilling a new hole?<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />

-- Craig
             
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bryanmmartin



Joined: 10 Jan 2006
Posts: 1018
PostPosted: Fri Jun 20, 2008 8:27 am    Post subject: Flaps Travel Reply with quote
20 degrees should work for most landings. If you need a steeper approach, use full flaps and a forward slip. At about 50 MPH and all the rudder and opposite aileron you can manage, the plane will drop lake a rock, then just kick it straight and give it a short shot of throttle just before the flare.
On Jun 19, 2008, at 7:50 PM, dingfelder wrote:
Quote:
Boys & Girls,
I've looked through the archives, and found only a little on this, though I think I remember previous discussion. Given the stroke of the flap motor (Feb. 2006 kit), I can only achieve 20 to 22 degrees travel with the linkage in it's most geometrically optimized position. I could gain maybe 2 degrees more by drilling a new (lower) hole in the torque tube arms. So ---- Is this sufficient for all purposes, including perhaps a steep approach for an off airport landing? Have others had the same outcome? Comments please.



--
Bryan Martin
N61BM, CH 601 XL,
RAM Subaru, Stratus redrive.
do not archive.



[quote][b]

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Bryan Martin
N61BM, CH 601 XL, Stratus Subaru.
do not archive.
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ding(at)tbscc.com
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PostPosted: Sat Jun 21, 2008 2:35 pm    Post subject: Flaps Travel Reply with quote
Thanks to all who responded concerning my inquiries about
flap travel. I also called Zenith and talked to Caleb. He told me that the
flap motor now provided with the kit will only provide 20 degrees travel,
though my kit has the previously supplied unit. This change was made to
conform to Sport Pilot compliance requirements. He said it had to do with
the ability to fully trim the elevator to compensate for the attitude change
with the flaps extended. I just finished rigging and adjusting my flaps and
ailerons. Admittedly, I was very anal about the entire process, and settled
for nothing less than perfection. I was able to achieve 24 degrees of flap
engagement. And Jay of Dallas, my switches ended up with slightly more than
3/16" between the closest connections. Now, if only this aircraft was
painted!!!

Lynn Dingfelder

601 XL / Corvair Corry, PA ding(at)tbscc.com

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