Eugene Zimmerman
Joined: 10 Jan 2006
Posts: 392
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 Posted: Wed Sep 06, 2006 10:45 am Post subject: elevator cables -- was Oil Pressure question |
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David, & Kolb Friends,
The problem you described and what you did that corrected it could
indicate another "possible" problem.
If your elevator cables are not tight enough you will be able to
move the stick fore and aft without the elevator moving the same
degree “under flight loads”.
This problem is more common than many kolb pilots recognize.
I recommend that all kolb owners do this simple check. Have someone
immobilize the trailing edge of the elevators by firmly holding them
in the neutral position then check how far the stick can be moved
fore and aft.
It is not uncommon to find that the stick can be moved full fore and
aft against the stops without any movement in the elevator.
Even tight cables have noticeable stretch.
Just checking for “no load” only elevator movement is inadequate and
potentially dangerous in my opinion. The elevator is by far your
most critical control surface and all good Kolb pilots will confirm
its working integrity.
David, the reason I suspect this could be your problem is because
with normal elevator control you should definitely be able to pitch
up your plane with "any" flap or aileron configuration.
Gene,
On Sep 6, 2006, at 9:20 AM, David Key wrote:
| Quote: |
Restated...
When I pull back on the stick the plane pitches up then stalls. It
didn't pitch up much before.
do not archive
> From: Thom Riddle <jtriddle(at)adelphia.net>
> Reply-To: kolb-list(at)matronics.com
> To: kolb-list(at)matronics.com
> Subject: Re: Oil Pressure question
> Date: Wed, 6 Sep 2006 07:47:16 -0400
>
> David,
>
> ...It pitches up in the stall now and it's easy to see and feel....
>
> Perhaps I'm misunderstanding you. Are you saying that when it
> stalls the nose pitches up? Or are you saying that when pitching
> up the nose (using elevator) that it stalls? If the nose pitches
> up in response to a stall, rather than as the cause of the stall,
> you have a problem.
>
> After a stall, nose should fall down and if the wings are fairly
> level and you are not yawed to badly, the airplane will start
> flying again immediately. If it automatically pitches up in
> response to a stall, this is dangerous, perhaps being caused by a
> way too aft CG.
>
> I hope I misunderstood you.
>
> Thom in Buffalo
> do not archive
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