REFLECTOR: Strake construction

Sat Jul 28 15:20:13 CDT 2007

Doug Holub:

I urge you to re-examine your strake build up. The photo you included
pictured a variance from plans. Please reconsider.

milt   

-----Original Message-----
From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Keith Hallsten
Sent: Saturday, July 28, 2007 2:43 PM
To: 'Velocity Aircraft Owners and Builders list'
Subject: Re: REFLECTOR: Strake construction

Doug,

Your photo shows that you are making a significant deviation from the
plans with your strake bulkhead arrangement, and I hope you have fully
evaluated the consequences!  Reducing the number of bulkheads will
increase the loads on the remaining bulkheads, and will also increase
the bending moment in the strake skins due to the increased span between
supports.  The anti-slosh effect of the bulkheads will also be reduced,
increasing risk of structural failure in turbulence.  The bond to foam
is very weak, so increasing the thickness of the foam core of a bulkhead
will have only a very small effect on the strength of the joint.  I
suggest that you either do a complete structural analysis to prove that
the arrangement will be adequate, or else go back to the plans!

Keith Hallsten

  _____  

From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Douglas Holub
Sent: Saturday, July 28, 2007 7:01 AM
To: Velocity Aircraft Owners and Builders list
Subject: Re: REFLECTOR: Floaters

Thanks for the info. I found the red balls at www.fletchair.com. The new
part number is 401129-5. It's in section 28 of their online catalog.
Below it in the catalog is a seal with a hole in it (called "U-cup seal
for AA1 fuel gauge") which might work well to keep the ball in the tube.

I hope to install my sight gauges next week. Attached is a picture of my
fuel tank. I wanted to keep it simple so that it would be easy to seal.
So I have only two fuel bulkheads, and I used 1" foam instead of 3/8"
foam so that there would be plenty of room for lots of goop on the top
edge.

Doug Holub

----- Original Message ----- 

From: David  <mailto:Dastaten at earthlink.net> Staten 

To: Velocity Aircraft  <mailto:reflector at tvbf.org> Owners and Builders
list 

Sent: Saturday, July 28, 2007 12:47 AM

Subject: Re: REFLECTOR: Floaters

Fletcher's and Fletchair were bought by Wilson a year or two again. The
number should work, but googling for fletcher's may be a dead end. 
I'd met mister Fletcher several times in the past, and admired him for
keepin the business up even into his 80's. 

Dave

PUSHERPILOT at wmconnect.com wrote: 

Chuck, 
I found the info on where I bought the red fuel balls: 

Fletchair, Inc 
9000 Randolph St 
Houston, TX 77061 
713  641- 2023 

Part No 5407 4001 4097 0757 
AA1 Fuel Float Ball 

I think that these are for a Grumman A/C 

This info is seven years old, but you can give it a try.  I installed
wires to keep the ball from going out the top or bottom. 

Good Luck, 
Mel Bina 

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