REFLECTOR: Holes in the Spar

[Alex Balic]

You can put small holes in the shear web- closer to the center (top to
bottom) the better- any holes in the caps would be a big disaster though.. I
would use Brett's method wherever possible.

 

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From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Brett Ferrell
Sent: Thursday, March 10, 2011 11:44 AM
To: Velocity Aircraft Owners and Builders list; Velocity Aircraft Owners and
Builders list
Subject: Re: REFLECTOR: Holes in the Spar

 

Jack,

 

I'm not sure what the "official" answer is.  I would expect it's probably OK
to put a hole in the shear web, but I chose not to out of an abundance of
caution.  I attached hardpoints to the spar with structural adhesive, and
attached everything to those hardpoints.


Brett

 


 

-------Original Message-------
From: Jack Prock 
To: Velocity Aircraft Owners and Builders list 
Subject: REFLECTOR: Holes in the Spar
Sent: 10 Mar '11 12:39

Hi,

 

With the pictures of the ELT installation going around, some of the pictures

show stuff attached to the inside of the main spar. Are you using screws

or bolts that go into or through the spar? I thought that was a no-no.

 

With that in mind, I am starting on the engine installation and want to
drill

holes through the firewall for attaching the oil cooler, etc. I am working
around

the spar and XL sump tank, and there doesn't seem to be a lot of real estate
to 

attach things.

 

What is the concensus? is it ok to put a few holes in the spar? 

 

Is it ok to put bolts in the firewall behind the sump tank? with bolt heads
against

the sump tank? I would remove the sump tank drill the hole, put

the bolt in, then replace the sump tank. But this would place the

bolt head flush against the back of the sump, and I forsee long term

vibration rubbing a hole in the tank. 

 

Am I being overly cautious?

 

Jack

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