REFLECTOR: Not enough Trim authority

[aminetech at bluefrog.com]

Scott,

The other thing to consider is canard incidence.  When I fly solo, which puts me very close to the aft cg limit, the canard stalls at 60 kn.  A higher stall speed would indicate the incidence is high and that would add to the trim problem at cruise.

John

--- scott at tnstaafl.net wrote:

From: Scott Derrick <scott at tnstaafl.net>
To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
Subject: Re: REFLECTOR: Not enough Trim authority
Date: Mon, 16 Nov 2009 16:29:58 -0700

John,

Musta been somebody else.  I've flown sans strainer and standard
install. Its on now with the flat side up, which I believe is the
standard way?    That would apply more up force which is exactly my
problem! 

I'll take it off and try it.  Then install upside down and see how all
three methods come out.

thanks,

Scott


aminetech at bluefrog.com wrote:
> Scott,
>
> Before I reversed the sparrow strainer, my pitch trim ran out at 155-160 kias.  I recall that you tried reversing it and didn't have enough trim up for approach.  Perhaps no strainer at all would be a happy medium that would work for you.
>
> John
>
> --- scott at tnstaafl.net wrote:
>
>
>
> I do have a problem with the trim.  I just don't have enough down trim
> for cruise speeds.  If my indicated is 150kias or below its fine. I am
> using the Strong System because I was under the impression it had a
> wider range of trim than the factory design. Now I wonder.  I have
> plenty of up trim on approach with single pilot but I haven't loaded up
> the front yet(forward cg).  Still waiting for the new Catto prop before
> I add any more ballast to the front seat.  I have the system installed
> so its got about 60% down trim travel, and 40% up trim, so I'm already 
> over  compensated  for down trim.  The instructions call for 50/50.  
> I'm sending Alex an email to see what he recommends.
>
> In the mean time I'm thinking about plan B, which is to reinstall the
> factory trim, but stiffen up the spring somewhat to provide more trim
> authority.  I'msomewhat reluctant because of the problem of runway trim
> with a stronger spring.
>
> What are the fast V's doing?  I had marginal trim before with the
> factory spring, not quite enough down, just barely enough up with the
> io360.  Thats why I changed to the Strong system. 
>
> Anybody else have this problem?  Solutions?
>
> Scott
>
>
>
>  
>
>
>
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