REFLECTOR: bulkhead flanges

Scott Baker sbakr at comcast.net
Thu Aug 23 12:36:12 CDT 2007


Wow!  The firewall/spar section looks really strong!
SB

  ----- Original Message ----- 
  From: Douglas Holub 
  To: Velocity Aircraft Owners and Builders list 
  Sent: Thursday, August 23, 2007 11:02 AM
  Subject: Re: REFLECTOR: bulkhead flanges


  Scott,

  In 1988, my kit was the 4th one ever shipped to a customer from the factory (I'm the third owner), and those first few kits contained the box spar you see in the picture. It's pretty stout. It's heavier and stronger than it needs to be; that's why they quit using it.  Attached is a picture of what it looks like from the inside of the plane.

  Doug Holub
    ----- Original Message ----- 
    From: Scott Baker 
    To: Velocity Aircraft Owners and Builders list 
    Sent: Thursday, August 23, 2007 4:40 AM
    Subject: Re: REFLECTOR: bulkhead flanges


    Doug,
    I am confused by the shape of the center section spar.  It looks wider than normal and is boxed.  Is this something of your own design? Just wondering.
    SB

      ----- Original Message ----- 
      From: Douglas Holub 
      To: reflector at tvbf.org 
      Sent: Wednesday, August 22, 2007 1:31 PM
      Subject: REFLECTOR: bulkhead flanges


      Here's an idea for those of you who haven't done your strakes yet. The plans say to install those two bulkheads that go between the center section spar and the fuel bulkhead after the top of the strake has been attached. I assume the reason is to make it is easier to glass the aft side of the fuel bulkhead to the upper strake. But having the upper strake installed will definitely make it harder to glass the inboard side of those two bulkheads (the ones with the 5" access holes.) Maybe some people aren't glassing the inboard side. But I thought doing it blind through those 5" holes would be like building a ship in a bottle. So I put gray tape around the bottom of those two bulkheads and glassed the bottom halves of the inboard sides before I put the upper strake on. I can put structural adhesive on those flanges for an easy installation even with the upper strake installed. 

      It's not a great idea, but I think it will help a little. I'm still going to try to add a little glass to the upper halves of the inboard sides using the ship-in-a-bottle method.

      And here's a plug for Noel's idea about putting play dough on the tops of the fuel bulkheads when fitting them to the upper strake surface. That was a good way to gauge the distance between the bulkheads and the strake.

      Doug Holub


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