KR> Trim Tabs

[Dan Heath]

Sure, many of us have to do that.  It is because the plane flies either nose
or tail heavy, and the trim tab alone is not enough to get it to fly level.
So we add a fixed tab to get the plane to fly near level and adjust out the
rest with the adjustable tab.  Mine is nose heavy, on purpose ( maybe a
little too much ).  Someone suggested adding a little weight in the tail as
a more aerodynamic way to balance out the flight attitude.  I may try that
someday when I am installing the Corvair.

See N64KR at http://KRBuilder.org - Then click on the pics 
See you at the 2010 - KR Gathering in Richmond, Ky - I39
There is a time for building and a time for FLYING and the time for Flying
has begun.
Daniel R. Heath - Lexington, SC

-Original Message-
From: krnet-bounces+danrh=windstream@mylist.net
[mailto:krnet-bounces+danrh=windstream@mylist.net] On Behalf Of Dave
Dunwoodie
Sent: Monday, May 03, 2010 7:20 PM
To: kr...@mylist.net
Subject: KR> Trim Tabs

In examining my KR2 for electric elevator trim, I was reminded to ask 
you guys:

There is a 9" by 2.5" added trim tab on the starboard side of the 
elevator, fixed and bent down at roughly 30 degrees.

Can anybody offer ideas why the builder would have done this?

Thanks.

Dave.


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KR> Trim Tabs

[Dave Dunwoodie]

In examining my KR2 for electric elevator trim, I was reminded to ask 
you guys:

There is a 9" by 2.5" added trim tab on the starboard side of the 
elevator, fixed and bent down at roughly 30 degrees.

Can anybody offer ideas why the builder would have done this?

Thanks.

Dave.

KR> Trim Tabs

[Stephen Teate]

Last night I was working on my elevator trim tab. It is the stock size
and location and looks like I will get between 20 & 25 degrees of
deflection each way. Is this enough?



Thanks in advance,

Stephen

Paradise, Texas

KR> Trim Tabs

[Larry Flesner]

At 08:48 AM 4/17/2006, you wrote:
>Last night I was working on my elevator trim tab. It is the stock size
>and location and looks like I will get between 20 & 25 degrees of
>deflection each way. Is this enough?
>Stephen


If your CG is correct, that should work.

Larry Flesner

KR>Trim tabs

[JIM VANCE]

Both the Learjet 25 and the AC-47 I flew in Viet Nam had free floating 
ailerons.  The control wheel was connected by cables to aileron trim tabs.  The 
controls were very effective.  But that is the reason that the Lear was limited 
to 0.80 Mach--aileron buzz was quite spectacular above the Mach limit.

Of course, the aileron trim tabs on my AC-47 were about the size of the 
elevators on a KR.

With the near-neutral stability of a KR, the effectiveness of the trim tab is 
small on a properly functioning elevator.  But, it is the difference between 
continuously correcting the aircraft attitude and getting a few seconds to do 
other things in the cockpit.

Jim Vance

va...@claflinwildcats.com