REFLECTOR:Flying without Cowl Fasteners

N.V.Frederick reflector@tvbf.org
Mon, 21 Apr 2003 18:40:30 -0600


Scott, what would be wrong with using a little loctite?
nolan.

----- Original Message -----
From: "Scott Derrick" <scott@tnstaafl.net>
To: <reflector@tvbf.org>
Sent: Monday, April 21, 2003 9:54 AM
Subject: Re: REFLECTOR:Flying without Cowl Fasteners


> I dunno?  It happens. I've lost two in 125 hours.  The screws and nut
> plates are the same size.  I'd hazard a guess its the compression of the
> fiberglass when its vibrating that allows the screw to back out. Metal
> doesn't compress as much(or at all) so once its tight it stays that way.
>
> Maybe I'm not torqueing them down enough?  I've also had the cowls off
> numerous times working out cooling issues, ignition installation,
> working out the bugs....
>
> How many hours on your SE? Lost any cowl screws yet?  I don't know how
> valid a comparison is between a Cherokee and a Velocity?
>
> Scott
>
> Laurence Coen wrote:
> > Scott,
> >
> > I don't understand why your cowl screws are coming unscrewed.  I have
been
> > flying a Cherokee 180 for 16 years and have yet to lose any of the lower
> > cowl screws.  These screws pass through the cowl and into a nut plate
> > mounted to the fuselage which is the same arrangement that is used on
the
> > Velocity.  Is it possible that you have 10-32 nut plates and 8-32
screws?
> > Just a thought but I can't think of any good reason you are having this
> > problem.
> >
> > Larry Coen
> > SE-RG/Franklin
> >
> > ----- Original Message -----
> > From: "Scott Derrick" <scott@tnstaafl.net>
> > To: <reflector@tvbf.org>
> > Sent: Monday, April 21, 2003 9:31 AM
> > Subject: REFLECTOR:Flying without Cowl Fasteners
> >
> >
> >
> >>Is anybody actually flying without cowl fasteners where the cowl meets
> >>the fuselage?
> >>
> >>The plans call for a lip extended rearward from the fuselage that the
> >>cowl slides inside of.  Screws(through the fuselage lip) and captured
> >>nuts(on the cowl) are then installed about every 6 inches along this
> >>overlap.
> >>
> >>Some ,all non-flying or not-tested I guess, say they are not using any
> >>screws?  Merri says he has built a U shaped slot instead of just a lip
> >>for he cowls to slid into so he doesn't have to use screws.  This sounds
> >>  doable and secure.
> >>
> >>I'd really like to reduce the number of screws(uncaptured) used to hold
> >>the cowl on since they have a tendency to come un screwed during flight
> >>and put large nicks in the prop.
> >>
> >>I'd also like to use something that has some flight hours on it.
> >>
> >>Scott
> >>
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