KR> cowl hinge mounting

[Tony King]

I have a Fisher FP202 Koala with hinge pins holding the upper cowl on (the
lower cowl is held on with screws).  They work great - takes about 10
seconds to get the cowl off for an engine check, and about the same to put
it back on.  One pin down each side and two much shorter ones across the
front.  They're about 20" long but they just slide in - no need for tools
or equipment.  Each pin has a right angle bend at the end to make a kind of
handle, which makes it much easier to slide the pins in.  There's also a
small stud (basically a screw head sticking out about 1/4") in teh lower
cowl that the right angle bits clip into to stop the pins from sliding in
flight.  It can be nasty if the pins slide out into the prop - and the cowl
coming off is not the worst bit.

Cheers,

Tony

On 26 November 2014 at 05:44, Chris Kinnaman via KRnet  wrote:

> I seem to recall an article in Sport Aviation many years ago about a
> Midget Mustang builder who attached the cheek cowls with piano hinges. When
> installing the wires, he would lube them with something which I have
> forgotten and spin them slowly with a drill while running them in,
> reporting no problem with that method. This was before powered
> screwdrivers. MM cheek cowls are pretty long but the curve is not too
> sharp, so, not sure if the drill technique would work here.
>
> Chris
>
> On 11/23/2014 8:52 PM, Mark Langford via KRnet wrote:
>
>> I found several photos detailing the hinge joint installation, and have
>> put them near the bottom of  http://www.n56ml.com/cowling.html. Looking
>> at the time stamps on the pictures, this process took me four hours from
>> start to finish to fasten the hinges to the top of the cowling (judging
>> from the photo timestamps).  It went somewhat faster on the bottom because
>> the location was predetermined. Something I've learned since then is to use
>> the narrowest hinges available to save weight.  They'll be fine...
>>
>>
>
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>

KR> cowl hinge mounting

[Richard Kaczmarek]

My KR and several other aircraft I own have the wire hinges for the cowl
and I have never had an issue.  Take a look at how Van's does theirs. It
makes for a nice clean look and a better looking fit on the cowl.

Richard Kaczmarek
Fast Little Airplanes LLC
937-243-7303
On Nov 25, 2014 7:00 PM, "Patrick Driscoll via KRnet" 
wrote:

>About 30 years ago, I flew  Fly Baby from Minnesota to Florida. The
> cowl had a hinge and wire set-up and the wire was not secured at either
> end. Twice after landing, I had someone ask me what type of tach I was
> using. The wire would work out about 5 or 6" after about three hours flying
> and it looked like the prop would contact it each time it passed. (it
> wouldn't go out far enough to actually touch the prop). People sure thought
> it was a tach.
> Patrick Driscoll
> Saint Paul, MN
> patrick36 at usfamily.net
> www.pensbypat.com
> If you can read this, Thank a teacher
> If you are reading this in English, thank a veteran
>
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> options
>

KR> cowl hinge mounting

[Patrick Driscoll]

About 30 years ago, I flew  Fly Baby from Minnesota to Florida. The cowl 
had a hinge and wire set-up and the wire was not secured at either end. 
Twice after landing, I had someone ask me what type of tach I was using. The 
wire would work out about 5 or 6" after about three hours flying and it 
looked like the prop would contact it each time it passed. (it wouldn't go 
out far enough to actually touch the prop). People sure thought it was a 
tach.
Patrick Driscoll
Saint Paul, MN
patrick36 at usfamily.net
www.pensbypat.com
If you can read this, Thank a teacher
If you are reading this in English, thank a veteran 

KR> cowl hinge mounting

[Chris Kinnaman]

I seem to recall an article in Sport Aviation many years ago about a 
Midget Mustang builder who attached the cheek cowls with piano hinges. 
When installing the wires, he would lube them with something which I 
have forgotten and spin them slowly with a drill while running them in, 
reporting no problem with that method. This was before powered 
screwdrivers. MM cheek cowls are pretty long but the curve is not too 
sharp, so, not sure if the drill technique would work here.

Chris

On 11/23/2014 8:52 PM, Mark Langford via KRnet wrote:
> I found several photos detailing the hinge joint installation, and 
> have put them near the bottom of  http://www.n56ml.com/cowling.html. 
> Looking at the time stamps on the pictures, this process took me four 
> hours from start to finish to fasten the hinges to the top of the 
> cowling (judging from the photo timestamps).  It went somewhat faster 
> on the bottom because the location was predetermined. Something I've 
> learned since then is to use the narrowest hinges available to save 
> weight.  They'll be fine...
>

KR> cowl hinge mounting

[Dan Heath]

And also, use the rolled hinges, not the extruded, for this application.



See N64KR at   http://KRBuilder.org - Then click on
the pics 



Peoples Choice at 2013 - KR Gathering in Mt. Vernon, Il - MVN 

Best KR at 2013 - KR Gathering in Mt. Vernon, Il - MVN 

Best Interior at 2013 - KR Gathering in Mt. Vernon, Il - MVN 

Best Paint at 2013 - KR Gathering in Mt. Vernon, Il - MVN 

Best Firwwall Forward at 2013 - KR Gathering in Mt. Vernon, Il - MVN 



Best Interior and Panel at 2008 - KR Gathering in Mt. Vernon, Il - MVN





Daniel R. Heath - Lexington, SC





-Original Message-



Something I've learned since then is to use the narrowest hinges available
to save weight.  

KR> cowl hinge mounting

[Mark Langford]

I found several photos detailing the hinge joint installation, and have 
put them near the bottom of  http://www.n56ml.com/cowling.html. Looking 
at the time stamps on the pictures, this process took me four hours from 
start to finish to fasten the hinges to the top of the cowling (judging 
from the photo timestamps).  It went somewhat faster on the bottom 
because the location was predetermined.  Something I've learned since 
then is to use the narrowest hinges available to save weight.  They'll 
be fine...

-- 
Mark Langford
ML at N56ML.com
http://www.n56ml.com

KR> Cowl hinge

[Solly Melyon]

Lee,
I think you should be able to bond the hinge in place with structural adhesive 
such as Hisol or the one made by PTM 

Solly Melyon-Mgr
AeroMax Aviation, LLC
www.aeromaxaviation.com
229.241.1175

--- On Thu, 9/17/09, Lee Van Dyke <l...@vandyke5.com> wrote:


From: Lee Van Dyke <l...@vandyke5.com>
Subject: KR> Cowl hinge
To: "KRnet" <kr...@mylist.net>
List-Post: krnet@list.krnet.org
Date: Thursday, September 17, 2009, 9:57 PM


I should have mentioned that I want to attach the hinge without the use of 
rivets on the top cowl.  I have located a few web sites that show how to attach 
the hinge with rivets, but I have a clear coat carbon fiber top cowl that I 
don't want to see rivets on.  I think I can just glass in the hinge if I put 
large enough holes in.

Lee Van Dyke 
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KR> Cowl hinge

[Lee Van Dyke]

I should have mentioned that I want to attach the hinge without the use of 
rivets on the top cowl.  I have located a few web sites that show how to attach 
the hinge with rivets, but I have a clear coat carbon fiber top cowl that I 
don't want to see rivets on.  I think I can just glass in the hinge if I put 
large enough holes in.

Lee Van Dyke 

KR> Cowl hinge

[Lee Van Dyke]

Netters,  Is there a good web site to show the process on installing colw 
hinges?  I have a new cowl and need to see the process.  Mark L does a good job 
with his colw but no photos of adding the hinge and the pin.

Lee Van Dyke

PS  Everybody have a great time at the Gathering.

KR> cowl hinge lessons learned

[Rick Human]

Or you can go to the Hobby Shop and get the next smaller size of music wire
to replace the pin. Tried it both ways and the smaller size is easier and
gives better results.

- Original Message -
From: "Brian Kraut" <brian.kr...@engalt.com>
To: "KRnet" <kr...@mylist.net>
Sent: Wednesday, February 23, 2005 10:00 PM
Subject: KR> cowl hinge lessons learned


> I have found out the hard way that it is much better to use the rolled
> hinges when you use them to attach your top and bottom cowl halves
together
> instead of the extruded hinges.  If I had bought them just for the cowl I
> would have used the cheaper rolled hinges that are plenty strong for the
> application, but I had a bunch of extra extruded hinge.
>
> The problem with the extruded hinge is that the hinge pin fits much
tighter
> and you have a lot harder time getting the pin in and out if your
alignment
> is not perfect.  Fortunately, a KR has a relatively straight cowl at the
> attach point so it is not usually a problem, but my Mustang has a fairly
> rounded cowl shape and the hinge goes around a gradual curve.
>
> I have found that if you have a very tight hinge pin that you can take a
> long hinge pin and beat it about an inch from the end with a hammer to
> flatten it.  Then you file it sort of rectangular to get the correct size
> and sharp corners.  File a bullet shape on the end and you can put it in a
> drill and use it to make the holes bigger.
>
> Brian Kraut
> Engineering Alternatives, Inc.
> www.engalt.com
>
>
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> please see other KRnet info at http://www.krnet.org/info.html
>

KR> cowl hinge lessons learned

[Brian Kraut]

I have found out the hard way that it is much better to use the rolled
hinges when you use them to attach your top and bottom cowl halves together
instead of the extruded hinges.  If I had bought them just for the cowl I
would have used the cheaper rolled hinges that are plenty strong for the
application, but I had a bunch of extra extruded hinge.

The problem with the extruded hinge is that the hinge pin fits much tighter
and you have a lot harder time getting the pin in and out if your alignment
is not perfect.  Fortunately, a KR has a relatively straight cowl at the
attach point so it is not usually a problem, but my Mustang has a fairly
rounded cowl shape and the hinge goes around a gradual curve.

I have found that if you have a very tight hinge pin that you can take a
long hinge pin and beat it about an inch from the end with a hammer to
flatten it.  Then you file it sort of rectangular to get the correct size
and sharp corners.  File a bullet shape on the end and you can put it in a
drill and use it to make the holes bigger.

Brian Kraut
Engineering Alternatives, Inc.
www.engalt.com