Author: "rick6a" <rick07x@...> Time: Wed Aug 14, 2002 2:50 pm PDT Link
Rather than go with the blueprint piano hinge arrangement for the
upper cowl area mating the firewall, I have elected to go with
floating nutplates and machine screws in this curved area. My
question pertains to the recommended thickness of the aluminum strap
that ties into the upper skin and firewall that the nutplates would
be fastened to. I have some .032 stock of sufficient length on hand,
but a little voice tells me that .040 would probably be better. I'm
guessing that whatever thickness of the strap that is recommended for
camlocks is probably ditto for my application. Is .032 okay, or
should I break out my checkbook?
Author: "Tim Bryan" <timbryan@...> Time: Wed Aug 14, 2002 5:58 pm PDT Link
Rick,
I put the skybolt fasteners in the top of the cowling just as you are
suggesting. Seems there was something in the skybolt kit indicating .040 I
went to a local (Precise Flight - makes speed brakes) and got a piece 48"
long by 2 3/4" wide SCRAPE from there bin. No Charge. I can't really say
030 wouldn't work, but .040 works well.
Tim Bryan
RV-6
Redmond, OR.
-------Original Message-------
From: RV-6and6A@yahoogroups.com
Date: Wednesday, August 14, 2002 02:50:31 PM
To: RV-6and6A@yahoogroups.com
Subject: [RV-6/6A] Cowl fasteners
Rather than go with the blueprint piano hinge arrangement for the
upper cowl area mating the firewall, I have elected to go with
floating nutplates and machine screws in this curved area. My
question pertains to the recommended thickness of the aluminum strap
that ties into the upper skin and firewall that the nutplates would
be fastened to. I have some .032 stock of sufficient length on hand,
but a little voice tells me that .040 would probably be better. I'm
guessing that whatever thickness of the strap that is recommended for
camlocks is probably ditto for my application. Is .032 okay, or
should I break out my checkbook?
Yahoo! Groups Sponsor
ADVERTISEMENT
To unsubscribe from this group, send an email to:
RV-6and6A-unsubscribe@egroups.com
Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
[Non-text portions of this message have been removed]
Author: kboatri144@... Time: Thu Aug 15, 2002 5:27 am PDT Link
In a message dated 8/14/02 5:51:04 PM Eastern Daylight Time,
rick07x@e... writes:
<< Rather than go with the blueprint piano hinge arrangement for the
upper cowl area mating the firewall, I have elected to go with
floating nutplates and machine screws in this curved area. My
question pertains to the recommended thickness of the aluminum strap
that ties into the upper skin and firewall that the nutplates would
be fastened to. I have some .032 stock of sufficient length on hand,
but a little voice tells me that .040 would probably be better. I'm
guessing that whatever thickness of the strap that is recommended for
camlocks is probably ditto for my application. Is .032 okay, or
should I break out my checkbook? >>
Rick,
That area has a nice curve in it, so 0.032 would probably be OK. That said,
I'd be more comfortable with the 0.040. Mine is made out of 0.063, which is
what I had on hand at the time. I consider it part of the aircraft's primary
structure!
Unless you're dead set on the floating nutplates, you can use the plain old
vanilla variety. I've got ten #6's across the top of my cowl, and it is
holding up beautifully.
Kyle Boatright
0-320/Aymar Demuth RV-6 Slider
Kennesaw, GA
http://www.angelfire.com/my/rv6
Author: "kenrv6" <kenrv6@...> Time: Thu Aug 15, 2002 7:19 am PDT Link
-After having the cowl hinges in place for almost 800 hours, I would
install them again in a heart beat...except for the bottom. A plate
with screws and nutplates riveted to the firewall flange works better
there, but you must remember to rivet it on before installing the
engine mount.
I'd NEVER go with camlocks or screws over the top or sides. The
hinges work fine and spread the load evenly instead of concentrating
it on the fastener positions. Not to mention that the hinges are
lighter and much cheaper.
-- In RV-6and6A@y..., "rick6a" <rick07x@e...> wrote:
> Rather than go with the blueprint piano hinge arrangement for the
> upper cowl area mating the firewall, I have elected to go with
> floating nutplates and machine screws in this curved area. My
> question pertains to the recommended thickness of the aluminum
strap
> that ties into the upper skin and firewall that the nutplates would
> be fastened to. I have some .032 stock of sufficient length on
hand,
> but a little voice tells me that .040 would probably be better. I'm
> guessing that whatever thickness of the strap that is recommended
for
> camlocks is probably ditto for my application. Is .032 okay, or
> should I break out my checkbook?
Author: "rick6a" <rick07x@...> Time: Thu Aug 15, 2002 7:20 am PDT Link
I have elected to go with floating nutplates and machine screws in
this curved area. My question pertains to the recommended thickness
of the aluminum strap that ties into the upper skin and firewall that
the nutplates would be fastened to. I have some .032 stock of
sufficient length on hand, but a little voice tells me that .040
would probably be better. I'm guessing that whatever thickness of the
strap that is recommended for camlocks is probably ditto for my
application. Is .032 okay, or should I break out my checkbook?
Rick,
That area has a nice curve in it, so 0.032 would probably be OK.
That said, I'd be more comfortable with the 0.040. Mine is made out
of 0.063, which is what I had on hand at the time. I consider it
part of the aircraft's primary structure!
Unless you're dead set on the floating nutplates, you can use the
plain old vanilla variety. I've got ten #6's across the top of my
cowl, and it is holding up beautifully.
Kyle Boatright
Thanks for the input Kyle. You and others have convinced me that .032
may be a little light for this application. I'll probably go
with .050. BTW, 10 years ago, I retrofitted my C-150 cowl with 4
dozen or so floating nutplates and all have held up very well. The
only down side is you must use a power screwdriver or you'll be all
day just taking the cowls off!