[Wing] Cherry Rivets

[Douglas G. Murray]

Bill -

I had to wait a minute or two while my head shrunk back to the correct size
before replying.  <distinguished, renowned and eminent>  Hardly - but thanks
for the vote of confidence.

Regarding your comment on closing structures. Yes, the second skin usually
takes a higher level of skill to complete IF you are building a metal
skinned aircraft. Tube & cloth, composite, wood  aircraft all need the same
inspection and USUALLY the level of workmanship is evident to the Inspector
while inspecting the finished portion. On subsequent inspections the
Inspector will review the completed parts even though they are cleared to be
finished. Another area that the Inspector is looking for that a lot of
builders may forget about is the internal workings of the parts - ie.
bellcranks and related linkage, wiring and chafe protection, internal
bracing and fastener integrity, and corrosion protection.  The common
practice is to leave one side of the structure open untill inspected. I
doubt if borescopes will ever be accepted as a general rule as the cost
would be prohibitive. Since the MD-RA is run by the moneys collected from
the inspections done, the additional cost of supplying borescopes to each
Inspector would drive the cost of the inspections right through the roof.

Some builders have the idea that inspections are only a hinderence and cost
increasing part of a project, but I submit that the inspections are a vital
part of the integrity of a completed aircraft and a real safety issue for
the builder. I can assure you that the Inspector is definately NOT getting
rich from inspecting aircraft. We do it for your safety and our love of
aviation.


Hope this helps,
Doug Murray

----- Original Message -----
From: Bill Robson <2w at telus.net>
To: <wing at vansairforce.org>
Sent: Sunday, November 18, 2001 7:20 PM
Subject: Re: [Wing] Cherry Rivets


> Hello Doug
> Missed you for breakfast this morning but, had breakfast with Ken and Ted.
> As far as being illustrious,-  I have alway thought of you as being
> distinguished,
> renowned and eminent.  Regarding closure of structures, there is no doubt
in
> my
> mind that any inspector would or want to to see inside of a constructed
> componet.
> The question being how much does a person close?  What is the standard?
> The part left unriveted, is actually the part the inspector should see
> completed.
> This part is usually the most difficult to do and if there is going to be
> any bad rivets
> thats where you will find them!  It would simplify the situation if the
kit
> builder totally
> completed the flight component in the jig...... and the MD-RA just equiped
> the
>  inspectors with bore scopes.  That would permit the inspectors to see
> through holes
> as small as 0.250 inches.
> I hope you enjoyed your trip to Vancouver, talk to you soon
> Bill Robson RV-6
>
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