REFLECTOR: amount of trim
John Dibble
aminetech at bluefrog.com
Mon Nov 10 21:05:29 CST 2008
Steve,
My brackets were siliconed to the TE, so I guess mine is different. The
SS and brackets are all one unit. So it seems that just reversing the
airfoil works as well as reversing the entire unit.
John
steve korney wrote:
>
> John...
>
> I left the brackets on the elevator and just reversed the sparrow
> strainer, so the brackets are still on the bottom of the elevator....
> The old style sparrow strainer had the bracket mounted solid to the
> elevator and screws held the wing of the sparrow strainer between the
> brackets....
>
> Best... Steve
>
>
>
> -----------------------------------------------------------------------
> Date: Mon, 10 Nov 2008 09:29:55 -0600
> From: aminetech at bluefrog.com
> To: reflector at tvbf.org
> Subject: Re: REFLECTOR: amount of trim
>
> Whole thing. nmflyer1 at aol.com wrote:
>
> John, Are you just reversing the airfoil on the sparrow
> strainer or are you reversing the whole thing?
> Kurt
>
> -----Original Message-----
> From: John Dibble ?aminetech at bluefrog.com?
> To: Velocity Aircraft Owners and Builders list
> ?reflector at tvbf.org?
> Sent: Mon, 10 Nov 2008 7:42 am
> Subject: Re: REFLECTOR: amount of trim
>
> When installed per the factory recommendation, the sparrow
> exerts a downward force on the elevator, which must be
> countered by the trim spring. The faster you fly, the
> greater the force. That's why you run out of trim at high
> speeds (IAS). When reversed, the sparrow exerts an upward
> force, working with the trim spring, significantly expanding
> trim capability.
> Actually, at the risk of complicating this, I believe the
> sparrow, in the reversed position provides more than the
> necessary force to overcome the force of the airstream on
> the elevator and the trim spring is actually now exerting a
> downward force on the elevator, but I don't know how to
> prove that.JohnLou Stedman wrote:
>
> Thanks John. I always like to have friends drop
> by but. I am a bit confused, why would I reverse
> the sparrow? I am not knogleable on that subject.
> Lou Stedman
> Velocity N7044Q
> Olean, NY
>
> ----- Original Message -----
> From:John Dibble
> To: Velocity Aircraft Owners and
> Builders list
> Sent: Monday, November 10, 2008 7:28 AM
> Subject: Re: REFLECTOR: amount of trim
> Lou,I had the same problem as you.
> Right now I'm at the new Dundee airport
> 17NK. If you're interested I can stop
> by and you can fly with me and see that
> reversing the sparrow strainer has no
> effect on stability.JohnLou Stedman
> wrote:
>
> Thanks Gary. Mine is a little
> different. When I am solo, I
> don't have enough down trim. I
> did a new W?B and found out I
> need thirty pounds of ballast
> in the nose when solo. That
> helps a lot with needed down
> trim but I can't help but
> think I need some down trim.
> What model are you flying? Lou
> Stedman
> Velocity N7044Q
> Olean, NY
>
> ----- Original
> Message -----
> From:Gary Stull
> To: Velocity
> Aircraft Owners and
> Builders list
> Sent: Sunday,
> November 09, 2008
> 10:17 PM
> Subject: Re:
> REFLECTOR: amount of
> trim
> I have much more up
> then down trim. In
> my case I never need
> any down trim even
> flying solo, always
> some up trim
> required.
>
> -----
> Original
> Message
> -----
> From:Lou
> Stedman
> To:
> Reflector
> Velocity
> Sent:
> Friday,
> November
> 07, 2008
> 5:20 PM
> Subject:
> REFLECTOR:
> amount of
> trim
> I have
> looked
> through my
> manual but
> do not
> find
> information
> on how
> much up
> and down
> trim I am
> suppose to
> have. It
> does say
> that the
> elevator
> should
> have 24-26
> degrees of
> down and
> 20 degrees
> of up. But
> it does
> not
> mention
> anything
> about
> trim. Can
> someone
> shed some
> light on
> this? I
> have lots
> of up trim
> but almost
> no down
> trim.Lou
> Stedman
> Velocity
> N7044Q
> Olean, NY
> -----------
>
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