REFLECTOR: Pitch Trim Mystery

[Scott Baker]

Hello John,
Removing the sparrow strainer will cause the pitch control motion to become
more sensitive - but not to the point of instability.
I'm not sure of the aircraft's behavior if the sparrow strainer were
reversed - thinking about it, the upward lifting of the strainer will lend
itself to favor nose pitch down - which left unchecked will result in
greater air speed - which gives more power to the sparrow strainer - which
causes the nose to pitch down some more --- I suppose at some point, the
pitch spring will halt this cycle of events.
SB


----- Original Message -----
From: "John Dibble" <aminetech at bluefrog.com>
To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
Sent: Thursday, February 16, 2006 1:08 PM
Subject: Re: REFLECTOR: Pitch Trim Mystery


> Steve,
> I have one installed.  I need to check, but I believe it wroks against the
spring, so
> I guess I need to reverse it.  How much work is involved to do that?
>
> Scott B - I believe you mentioned that reversing the strainer could cause
> instability.  How can I flight test for this?
>
> In the meantime, I plan to add 20lb to the nose, so I won't have to use
the full trim
> adjustment at cruise.
>
> John
>
>