REFLECTOR: Adjusting wing incidence

[Peter Braswell]

Thanks all for the responses on this and thanks too for pointing out the
obvious!  :)  I think sometimes focussing in on the details it's hard to
pull back and look at the big picture.  Makes sense that the wings would
want to rotate up given my current point of the build and given the weight
of the wing and the winglet.  Onward then ....

Best,
Peter

------------------------------------------------------------------------
*"It's a Jungle Up There": www.zuluworks.com*
*Great Aviation Gear: www.sky-gadgets.com*
------------------------------------------------------------------------



On Wed, Sep 14, 2011 at 4:39 PM, <jerry at jlbent.com> wrote:

> I thnk Scott has the answer.  You really don't have the spar set until you
> have the upper strake attached.  You will find that the wing will rotate
> quit a lot until you have the strake completed.  That means that you have to
> address wing orientation throughout the process of strake building.  Mostly
> when attaching the upper strake.
>
> Another thing to consider.  The most critical relationship on the
> airframe is between the wing incidence and the canard incidence.  The
> firewall is not really all that important.  It's easy to shim the motor
> mount.
>
>
>
>
> Jerry Brainard
> Jerry at JLBEnt.com
>
>
>
> -------Original Message-------
> From: Peter Braswell **
> To: Velocity Aircraft Owners and Builders list **
> Subject: Re: REFLECTOR: Adjusting wing incidence
> Sent: Sep 14 '11 7:39am
>
> Scott,
> DUH!  That makes total sense and I hadn't thought about this!  I think you
> might be right because all this started off "square and level" and has
> seemed to change in the last few weeks as everything has settled.  There is
> a lot of weight aft, so twisting makes sense.
>
> Thanks Scott!
>
> Peter
>
> ------------------------------------------------------------------------
> *"It's a Jungle Up There": www.zuluworks.com*
> *Great Aviation Gear: www.sky-gadgets.com*
> ------------------------------------------------------------------------
>
>
>
> On Wed, Sep 14, 2011 at 8:05 AM, Scott Baker <scottb33333 at gmail.com>wrote:
>
>> **
>> Peter,
>> With only the lower strake in place, the center section spar will twist
>> with the unsupported weight of the wings attached.  You many not have a
>> problem at all.  Be sure to support to the trailing edge of the wings to
>> relieve stress on the cc spar.
>> Scott B
>>
>>
>>  ----- Original Message -----
>> *From:* Peter Braswell <peter.braswell at gmail.com>
>> *To:* Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
>> *Sent:* Wednesday, September 14, 2011 6:56 AM
>> *Subject:* REFLECTOR: Adjusting wing incidence
>>
>> All,
>> After attaching my lower strake and comparing the angle between the strake
>> and wing, things didn't look right.
>>
>> After going back and verifying the right measurements off the spar to get
>> the strake aligned properly (they were correct) I remeasured the incidence
>> of the wings.  With the firewall 90 degrees, the right wing was off level
>> about 1.1 degrees.  The left wing about the same.
>>
>> Though not a tragedy, I'm puzzled.  This seems like a lot to be off with
>> the wings bolted directly to the spar.  Is this common?
>>
>> At any rate, I understand adjustments can be made by shimming out the wing
>> attach bolts.  I was wondering how folks are doing this?  Washers seem the
>> most obvious, but maneuvering them in there might be tricky.  Was wondering
>> if anybody has fabricated a bushing out of aluminum tubing or something
>> similar to act as a stand-off, whether that's safe and if so, what material
>> should be used (aluminum, steel, ???) or should I stick with washers?
>>
>> TIA,
>> Peter
>>
>> ------------------------------------------------------------------------
>> *"It's a Jungle Up There": www.zuluworks.com*
>> *Great Aviation Gear: www.sky-gadgets.com*
>> ------------------------------------------------------------------------
>>
>>  ------------------------------
>>
>>
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