The Murphy Builders Site

Posted: **Sun Feb 19, 2012 8:07 pm**

Jesse

I think it should be sealed as good as possible, if air flows in through
it the hot air from the cylinders might not flow easily out the bottom
due to the cold air flow in and maybe up from below

Most I have seen seem to be boxed in, I have several variations on mine
and cant decide the best or simplest design, some are easy to make som
are hard to make

Cheers

Mike#007

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of
Jesse Jenks
Sent: December 1, 2010 10:31 AM
To: Builders list
Subject: [rebel-builders] 4 door cowl-air box

For those of you with the 4 door, what is typically done where the carb
air box protrudes through the bottom spine? It looks like most people
box in around it, but can it just hang out in the airstream? Also,
should there be some sort of gap seal material between the air box and
the cowl, or just leave enough space so they don't rub? It doesn't seem
like a critical area as far as air flow/engine cooling.
Thanks.
jesse

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Posted: **Sun Feb 19, 2012 8:07 pm**

That's a good point Mike. I'll give it some more thought.

Subject: RE: [rebel-builders] 4 door cowl-air box
Date: Wed, 1 Dec 2010 10:52:19 -0500
From: Michael.Jones@snclavalin.com
To: rebel-builders@dcsol.com

Jesse

I think it should be sealed as good as possible, if air flows in through
it the hot air from the cylinders might not flow easily out the bottom
due to the cold air flow in and maybe up from below

Most I have seen seem to be boxed in, I have several variations on mine
and cant decide the best or simplest design, some are easy to make som
are hard to make

Cheers

Mike#007

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of
Jesse Jenks
Sent: December 1, 2010 10:31 AM
To: Builders list
Subject: [rebel-builders] 4 door cowl-air box

For those of you with the 4 door, what is typically done where the carb
air box protrudes through the bottom spine? It looks like most people
box in around it, but can it just hang out in the airstream? Also,
should there be some sort of gap seal material between the air box and
the cowl, or just leave enough space so they don't rub? It doesn't seem
like a critical area as far as air flow/engine cooling.
Thanks.
jesse

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Posted: **Sun Feb 19, 2012 8:07 pm**

I still owe you some pics of my partial cowl, will try to send this
weekend

cheers

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of
Jesse Jenks
Sent: December 1, 2010 2:45 PM
To: Builders list
Subject: RE: [rebel-builders] 4 door cowl-air box

That's a good point Mike. I'll give it some more thought.

Subject: RE: [rebel-builders] 4 door cowl-air box
Date: Wed, 1 Dec 2010 10:52:19 -0500
From: Michael.Jones@snclavalin.com
To: rebel-builders@dcsol.com

Jesse

I think it should be sealed as good as possible, if air flows in

through

it the hot air from the cylinders might not flow easily out the bottom
due to the cold air flow in and maybe up from below

Most I have seen seem to be boxed in, I have several variations on

mine

and cant decide the best or simplest design, some are easy to make som
are hard to make

Cheers

Mike#007

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of
Jesse Jenks
Sent: December 1, 2010 10:31 AM
To: Builders list
Subject: [rebel-builders] 4 door cowl-air box

For those of you with the 4 door, what is typically done where the

carb

air box protrudes through the bottom spine? It looks like most people
box in around it, but can it just hang out in the airstream? Also,
should there be some sort of gap seal material between the air box and
the cowl, or just leave enough space so they don't rub? It doesn't

seem

like a critical area as far as air flow/engine cooling.
Thanks.
jesse

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Posted: **Sun Feb 19, 2012 8:07 pm**

Mike,
I have the nosebowl to front baffle area pretty much under control now, but if you have some pics of your lower cowl and airbox area that would be great.
Thanks.

Subject: RE: [rebel-builders] 4 door cowl-air box
Date: Wed, 1 Dec 2010 14:54:28 -0500
From: Michael.Jones@snclavalin.com
To: rebel-builders@dcsol.com

I still owe you some pics of my partial cowl, will try to send this
weekend

cheers

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of
Jesse Jenks
Sent: December 1, 2010 2:45 PM
To: Builders list
Subject: RE: [rebel-builders] 4 door cowl-air box

That's a good point Mike. I'll give it some more thought.

Subject: RE: [rebel-builders] 4 door cowl-air box
Date: Wed, 1 Dec 2010 10:52:19 -0500
From: Michael.Jones@snclavalin.com
To: rebel-builders@dcsol.com

Jesse

I think it should be sealed as good as possible, if air flows in
through
it the hot air from the cylinders might not flow easily out the bottom
due to the cold air flow in and maybe up from below

Most I have seen seem to be boxed in, I have several variations on
mine
and cant decide the best or simplest design, some are easy to make som
are hard to make

Cheers

Mike#007

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of
Jesse Jenks
Sent: December 1, 2010 10:31 AM
To: Builders list
Subject: [rebel-builders] 4 door cowl-air box

For those of you with the 4 door, what is typically done where the
carb
air box protrudes through the bottom spine? It looks like most people
box in around it, but can it just hang out in the airstream? Also,
should there be some sort of gap seal material between the air box and
the cowl, or just leave enough space so they don't rub? It doesn't
seem
like a critical area as far as air flow/engine cooling.
Thanks.
jesse

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Posted: **Sun Feb 19, 2012 8:07 pm**

Sent you both some shots I took today while putting the babies away for the
winter..

Be forewarned.. while sealing that intake filter seems like a great
idea...it had better be some really soft foam with room to move or you're
going to hate the expense of welding and replacing cracked air boxes.

----- Original Message -----
From: "Jesse Jenks" <jessejenks@hotmail.com>
To: "Builders list" <rebel-builders@dcsol.com>
Sent: Wednesday, December 01, 2010 3:06 PM
Subject: RE: [rebel-builders] 4 door cowl-air box

Mike,
I have the nosebowl to front baffle area pretty much under control now,
but if you have some pics of your lower cowl and airbox area that would be
great.
Thanks.

Subject: RE: [rebel-builders] 4 door cowl-air box
Date: Wed, 1 Dec 2010 14:54:28 -0500
From: Michael.Jones@snclavalin.com
To: rebel-builders@dcsol.com

I still owe you some pics of my partial cowl, will try to send this
weekend

cheers

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of
Jesse Jenks
Sent: December 1, 2010 2:45 PM
To: Builders list
Subject: RE: [rebel-builders] 4 door cowl-air box

That's a good point Mike. I'll give it some more thought.

Subject: RE: [rebel-builders] 4 door cowl-air box
Date: Wed, 1 Dec 2010 10:52:19 -0500
From: Michael.Jones@snclavalin.com
To: rebel-builders@dcsol.com

Jesse

I think it should be sealed as good as possible, if air flows in
through
it the hot air from the cylinders might not flow easily out the bottom
due to the cold air flow in and maybe up from below

Most I have seen seem to be boxed in, I have several variations on
mine
and cant decide the best or simplest design, some are easy to make som
are hard to make

Cheers

Mike#007

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of
Jesse Jenks
Sent: December 1, 2010 10:31 AM
To: Builders list
Subject: [rebel-builders] 4 door cowl-air box

For those of you with the 4 door, what is typically done where the
carb
air box protrudes through the bottom spine? It looks like most people
box in around it, but can it just hang out in the airstream? Also,
should there be some sort of gap seal material between the air box and
the cowl, or just leave enough space so they don't rub? It doesn't
seem
like a critical area as far as air flow/engine cooling.
Thanks.
jesse

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Posted: **Sun Feb 19, 2012 8:07 pm**

Yep good advice as always wayne, heard this from others too, cant have air
box to close or it gets broke
Where are the pics sent

Cheers

Mike

Ps-best wishes and hope family is doing good

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of Wayne
G. O'Shea
Sent: Wednesday, December 01, 2010 1:34 PM
To: rebel-builders@dcsol.com
Subject: Re: [rebel-builders] 4 door cowl-air box

Sent you both some shots I took today while putting the babies away for the
winter..

Be forewarned.. while sealing that intake filter seems like a great
idea...it had better be some really soft foam with room to move or you're
going to hate the expense of welding and replacing cracked air boxes.

----- Original Message -----
From: "Jesse Jenks" <jessejenks@hotmail.com>
To: "Builders list" <rebel-builders@dcsol.com>
Sent: Wednesday, December 01, 2010 3:06 PM
Subject: RE: [rebel-builders] 4 door cowl-air box

Mike,
I have the nosebowl to front baffle area pretty much under control now,
but if you have some pics of your lower cowl and airbox area that would be

great.
Thanks.

Subject: RE: [rebel-builders] 4 door cowl-air box
Date: Wed, 1 Dec 2010 14:54:28 -0500
From: Michael.Jones@snclavalin.com
To: rebel-builders@dcsol.com

I still owe you some pics of my partial cowl, will try to send this
weekend

cheers

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of
Jesse Jenks
Sent: December 1, 2010 2:45 PM
To: Builders list
Subject: RE: [rebel-builders] 4 door cowl-air box

That's a good point Mike. I'll give it some more thought.

Subject: RE: [rebel-builders] 4 door cowl-air box
Date: Wed, 1 Dec 2010 10:52:19 -0500
From: Michael.Jones@snclavalin.com
To: rebel-builders@dcsol.com

Jesse

I think it should be sealed as good as possible, if air flows in
through
it the hot air from the cylinders might not flow easily out the bottom
due to the cold air flow in and maybe up from below

Most I have seen seem to be boxed in, I have several variations on
mine
and cant decide the best or simplest design, some are easy to make som
are hard to make

Cheers

Mike#007

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of
Jesse Jenks
Sent: December 1, 2010 10:31 AM
To: Builders list
Subject: [rebel-builders] 4 door cowl-air box

For those of you with the 4 door, what is typically done where the
carb
air box protrudes through the bottom spine? It looks like most people
box in around it, but can it just hang out in the airstream? Also,
should there be some sort of gap seal material between the air box and
the cowl, or just leave enough space so they don't rub? It doesn't
seem
like a critical area as far as air flow/engine cooling.
Thanks.
jesse

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Posted: **Sun Feb 19, 2012 8:07 pm**

Your other address at work.. but I can forward to cogeco as well..

----- Original Message -----
From: "mike jones" <mfjrebel007r@cogeco.ca>
To: <rebel-builders@dcsol.com>
Sent: Wednesday, December 01, 2010 7:53 PM
Subject: RE: [rebel-builders] 4 door cowl-air box

Yep good advice as always wayne, heard this from others too, cant have air
box to close or it gets broke
Where are the pics sent

Cheers

Mike

Ps-best wishes and hope family is doing good

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of
Wayne
G. O'Shea
Sent: Wednesday, December 01, 2010 1:34 PM
To: rebel-builders@dcsol.com
Subject: Re: [rebel-builders] 4 door cowl-air box

Sent you both some shots I took today while putting the babies away for
the
winter..

Be forewarned.. while sealing that intake filter seems like a great
idea...it had better be some really soft foam with room to move or you're
going to hate the expense of welding and replacing cracked air boxes.

----- Original Message -----
From: "Jesse Jenks" <jessejenks@hotmail.com>
To: "Builders list" <rebel-builders@dcsol.com>
Sent: Wednesday, December 01, 2010 3:06 PM
Subject: RE: [rebel-builders] 4 door cowl-air box

Mike,
I have the nosebowl to front baffle area pretty much under control now,
but if you have some pics of your lower cowl and airbox area that would
be

great.
Thanks.

Subject: RE: [rebel-builders] 4 door cowl-air box
Date: Wed, 1 Dec 2010 14:54:28 -0500
From: Michael.Jones@snclavalin.com
To: rebel-builders@dcsol.com

I still owe you some pics of my partial cowl, will try to send this
weekend

cheers

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of
Jesse Jenks
Sent: December 1, 2010 2:45 PM
To: Builders list
Subject: RE: [rebel-builders] 4 door cowl-air box

That's a good point Mike. I'll give it some more thought.
through mine carb seem

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Posted: **Sun Feb 19, 2012 8:07 pm**

Thanks wayne, great minds must think alike, mine is pretty close to that,
the fixed support under cabin and the slopping surface

Cheers

mike

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of Wayne
G. O'Shea
Sent: Wednesday, December 01, 2010 2:40 PM
To: rebel-builders@dcsol.com
Subject: Re: [rebel-builders] 4 door cowl-air box

Your other address at work.. but I can forward to cogeco as well..

----- Original Message -----
From: "mike jones" <mfjrebel007r@cogeco.ca>
To: <rebel-builders@dcsol.com>
Sent: Wednesday, December 01, 2010 7:53 PM
Subject: RE: [rebel-builders] 4 door cowl-air box

Yep good advice as always wayne, heard this from others too, cant have air
box to close or it gets broke
Where are the pics sent

Cheers

Mike

Ps-best wishes and hope family is doing good

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of
Wayne
G. O'Shea
Sent: Wednesday, December 01, 2010 1:34 PM
To: rebel-builders@dcsol.com
Subject: Re: [rebel-builders] 4 door cowl-air box

Sent you both some shots I took today while putting the babies away for
the
winter..

Be forewarned.. while sealing that intake filter seems like a great
idea...it had better be some really soft foam with room to move or you're
going to hate the expense of welding and replacing cracked air boxes.

----- Original Message -----
From: "Jesse Jenks" <jessejenks@hotmail.com>
To: "Builders list" <rebel-builders@dcsol.com>
Sent: Wednesday, December 01, 2010 3:06 PM
Subject: RE: [rebel-builders] 4 door cowl-air box

Mike,
I have the nosebowl to front baffle area pretty much under control now,
but if you have some pics of your lower cowl and airbox area that would
be

great.
Thanks.

Subject: RE: [rebel-builders] 4 door cowl-air box
Date: Wed, 1 Dec 2010 14:54:28 -0500
From: Michael.Jones@snclavalin.com
To: rebel-builders@dcsol.com

I still owe you some pics of my partial cowl, will try to send this
weekend

cheers

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of
Jesse Jenks
Sent: December 1, 2010 2:45 PM
To: Builders list
Subject: RE: [rebel-builders] 4 door cowl-air box

That's a good point Mike. I'll give it some more thought.
through mine carb seem

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Posted: **Sun Feb 19, 2012 8:07 pm**

You only need the support when you pull all the doors.. but you sure want
it!!!

----- Original Message -----
From: "mike jones" <mfjrebel007r@cogeco.ca>
To: <rebel-builders@dcsol.com>
Sent: Wednesday, December 01, 2010 10:23 PM
Subject: RE: [rebel-builders] 4 door cowl-air box

Thanks wayne, great minds must think alike, mine is pretty close to that,
the fixed support under cabin and the slopping surface

Cheers

mike

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of
Wayne
G. O'Shea
Sent: Wednesday, December 01, 2010 2:40 PM
To: rebel-builders@dcsol.com
Subject: Re: [rebel-builders] 4 door cowl-air box

Your other address at work.. but I can forward to cogeco as well..

----- Original Message -----
From: "mike jones" <mfjrebel007r@cogeco.ca>
To: <rebel-builders@dcsol.com>
Sent: Wednesday, December 01, 2010 7:53 PM
Subject: RE: [rebel-builders] 4 door cowl-air box

Yep good advice as always wayne, heard this from others too, cant have
air
box to close or it gets broke
Where are the pics sent

Cheers

Mike

Ps-best wishes and hope family is doing good

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of
Wayne
G. O'Shea
Sent: Wednesday, December 01, 2010 1:34 PM
To: rebel-builders@dcsol.com
Subject: Re: [rebel-builders] 4 door cowl-air box

Sent you both some shots I took today while putting the babies away for
the
winter..

Be forewarned.. while sealing that intake filter seems like a great
idea...it had better be some really soft foam with room to move or you're
going to hate the expense of welding and replacing cracked air boxes.

----- Original Message -----
From: "Jesse Jenks" <jessejenks@hotmail.com>
To: "Builders list" <rebel-builders@dcsol.com>
Sent: Wednesday, December 01, 2010 3:06 PM
Subject: RE: [rebel-builders] 4 door cowl-air box

Mike,
I have the nosebowl to front baffle area pretty much under control now,
but if you have some pics of your lower cowl and airbox area that would
be

great.
Thanks.

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Posted: **Sun Feb 19, 2012 8:07 pm**

BTW.. I've seen many variations over the years. That one is my own
airplane.. 15 years.. I'd still do it the same way! Notice the extra cowl
"flaps" I had to add for cooling on floats though.

----- Original Message -----
From: "mike jones" <mfjrebel007r@cogeco.ca>
To: <rebel-builders@dcsol.com>
Sent: Wednesday, December 01, 2010 10:23 PM
Subject: RE: [rebel-builders] 4 door cowl-air box

Thanks wayne, great minds must think alike, mine is pretty close to that,
the fixed support under cabin and the slopping surface

Cheers

mike

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of
Wayne
G. O'Shea
Sent: Wednesday, December 01, 2010 2:40 PM
To: rebel-builders@dcsol.com
Subject: Re: [rebel-builders] 4 door cowl-air box

Your other address at work.. but I can forward to cogeco as well..

----- Original Message -----
From: "mike jones" <mfjrebel007r@cogeco.ca>
To: <rebel-builders@dcsol.com>
Sent: Wednesday, December 01, 2010 7:53 PM
Subject: RE: [rebel-builders] 4 door cowl-air box

Yep good advice as always wayne, heard this from others too, cant have
air
box to close or it gets broke
Where are the pics sent

Cheers

Mike

Ps-best wishes and hope family is doing good

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of
Wayne
G. O'Shea
Sent: Wednesday, December 01, 2010 1:34 PM
To: rebel-builders@dcsol.com
Subject: Re: [rebel-builders] 4 door cowl-air box

Sent you both some shots I took today while putting the babies away for
the
winter..

Be forewarned.. while sealing that intake filter seems like a great
idea...it had better be some really soft foam with room to move or you're
going to hate the expense of welding and replacing cracked air boxes.

----- Original Message -----
From: "Jesse Jenks" <jessejenks@hotmail.com>
To: "Builders list" <rebel-builders@dcsol.com>
Sent: Wednesday, December 01, 2010 3:06 PM
Subject: RE: [rebel-builders] 4 door cowl-air box

Mike,
I have the nosebowl to front baffle area pretty much under control now,
but if you have some pics of your lower cowl and airbox area that would
be

great.
Thanks.

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Posted: **Sun Feb 19, 2012 8:07 pm**

Also.. dumb, but I just checked the achives.. I uploaded shots eons ago of
my 4 door cowling in Rebel - Cowling.. where else! lol

----- Original Message -----
From: "Wayne G. O'Shea" <oifa@irishfield.on.ca>
To: <rebel-builders@dcsol.com>
Sent: Wednesday, December 01, 2010 7:28 PM
Subject: Re: [rebel-builders] 4 door cowl-air box

BTW.. I've seen many variations over the years. That one is my own
airplane.. 15 years.. I'd still do it the same way! Notice the extra cowl
"flaps" I had to add for cooling on floats though.

----- Original Message -----
From: "mike jones" <mfjrebel007r@cogeco.ca>
To: <rebel-builders@dcsol.com>
Sent: Wednesday, December 01, 2010 10:23 PM
Subject: RE: [rebel-builders] 4 door cowl-air box

Thanks wayne, great minds must think alike, mine is pretty close to that,
the fixed support under cabin and the slopping surface

Cheers

mike

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of
Wayne
G. O'Shea
Sent: Wednesday, December 01, 2010 2:40 PM
To: rebel-builders@dcsol.com
Subject: Re: [rebel-builders] 4 door cowl-air box

Your other address at work.. but I can forward to cogeco as well..

----- Original Message -----
From: "mike jones" <mfjrebel007r@cogeco.ca>
To: <rebel-builders@dcsol.com>
Sent: Wednesday, December 01, 2010 7:53 PM
Subject: RE: [rebel-builders] 4 door cowl-air box

Yep good advice as always wayne, heard this from others too, cant have
air
box to close or it gets broke
Where are the pics sent

Cheers

Mike

Ps-best wishes and hope family is doing good

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of
Wayne
G. O'Shea
Sent: Wednesday, December 01, 2010 1:34 PM
To: rebel-builders@dcsol.com
Subject: Re: [rebel-builders] 4 door cowl-air box

Sent you both some shots I took today while putting the babies away for
the
winter..

Be forewarned.. while sealing that intake filter seems like a great
idea...it had better be some really soft foam with room to move or
you're
going to hate the expense of welding and replacing cracked air boxes.

----- Original Message -----
From: "Jesse Jenks" <jessejenks@hotmail.com>
To: "Builders list" <rebel-builders@dcsol.com>
Sent: Wednesday, December 01, 2010 3:06 PM
Subject: RE: [rebel-builders] 4 door cowl-air box

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Posted: **Sun Feb 19, 2012 8:07 pm**

Wayne,
Thanks for the pics, that's very helpful. I have also been looking at your pics on the archives btw. So, would you advise building the lower cowl deeper in anticipation of cooling issues on floats, or just wait and see what I get? The fixed cowl flaps look fine anyway though, so I wouldn't mind doing that later. I was planning to put the lower cowl 3 1/2" below the firewall. What do you think? I am also putting a lot of work into the inlet area/front baffles, so should have a good amount of inlet air.
Regarding your caution about having the airbox too close to the surrounding cowl, It does look like you have a pretty tight fit. What would you consider adequate clearance there, like 1/4"? Do you use something like weatherstripping tape to seal around it, or just leave an air gap? You have your channel flanges facing down to create the contour around the airbox (which I like), are there additional angle flanges on the inside of your bottom support?
It looks like you have a carb air temp sensor. Do you find that a useful addition?
Hope all my questions aren't too annoying. Thanks again.
Jesse

From: oifa@irishfield.on.ca
To: rebel-builders@dcsol.com
Subject: Re: [rebel-builders] 4 door cowl-air box
Date: Wed, 1 Dec 2010 21:27:13 -0500

Also.. dumb, but I just checked the achives.. I uploaded shots eons ago of
my 4 door cowling in Rebel - Cowling.. where else! lol

----- Original Message -----
From: "Wayne G. O'Shea" <oifa@irishfield.on.ca>
To: <rebel-builders@dcsol.com>
Sent: Wednesday, December 01, 2010 7:28 PM
Subject: Re: [rebel-builders] 4 door cowl-air box

BTW.. I've seen many variations over the years. That one is my own
airplane.. 15 years.. I'd still do it the same way! Notice the extra cowl
"flaps" I had to add for cooling on floats though.

----- Original Message -----
From: "mike jones" <mfjrebel007r@cogeco.ca>
To: <rebel-builders@dcsol.com>
Sent: Wednesday, December 01, 2010 10:23 PM
Subject: RE: [rebel-builders] 4 door cowl-air box

Thanks wayne, great minds must think alike, mine is pretty close to that,
the fixed support under cabin and the slopping surface

Cheers

mike

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of
Wayne
G. O'Shea
Sent: Wednesday, December 01, 2010 2:40 PM
To: rebel-builders@dcsol.com
Subject: Re: [rebel-builders] 4 door cowl-air box

Your other address at work.. but I can forward to cogeco as well..

----- Original Message -----
From: "mike jones" <mfjrebel007r@cogeco.ca>
To: <rebel-builders@dcsol.com>
Sent: Wednesday, December 01, 2010 7:53 PM
Subject: RE: [rebel-builders] 4 door cowl-air box

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Posted: **Sun Feb 19, 2012 8:07 pm**

Sorry.. was at the daughters. Lowering the airbox area hinges won't buy you
much extra outlet sq inches due to the way the door wraps around the lower
edge of the fus/firewall corner. My fix cowl flaps add about 45 sq inches of
outlet.

As for the hinge/angle combo.. it's just the angle your see.. attaching on
the outside of the nose bowl lip and the hinge that holds the nut plate for
the screw and goes on the inside, with the .025 material sandwiched between
the two that closes off the area ahead and behind the inlet filter.

As for tightness.. you can be pretty snug with a conical mount.. with a
dynafocal you need at LEAST 1/2" all around.. and you'd seal that with some
really soft weather strip material or silcon baffle seal material. Conical
mount.. can be almost touching and IMHO doesn't require any seal..

Wayne

----- Original Message -----
From: "Jesse Jenks" <jessejenks@hotmail.com>
To: "Builders list" <rebel-builders@dcsol.com>
Sent: Thursday, December 02, 2010 11:10 AM
Subject: RE: [rebel-builders] 4 door cowl-air box

Wayne,
Thanks for the pics, that's very helpful. I have also been looking at your
pics on the archives btw. So, would you advise building the lower cowl
deeper in anticipation of cooling issues on floats, or just wait and see
what I get? The fixed cowl flaps look fine anyway though, so I wouldn't
mind doing that later. I was planning to put the lower cowl 3 1/2" below
the firewall. What do you think? I am also putting a lot of work into the
inlet area/front baffles, so should have a good amount of inlet air.
Regarding your caution about having the airbox too close to the
surrounding cowl, It does look like you have a pretty tight fit. What
would you consider adequate clearance there, like 1/4"? Do you use
something like weatherstripping tape to seal around it, or just leave an
air gap? You have your channel flanges facing down to create the contour
around the airbox (which I like), are there additional angle flanges on
the inside of your bottom support?
It looks like you have a carb air temp sensor. Do you find that a useful
addition?
Hope all my questions aren't too annoying. Thanks again.
Jesse

From: oifa@irishfield.on.ca
To: rebel-builders@dcsol.com
Subject: Re: [rebel-builders] 4 door cowl-air box
Date: Wed, 1 Dec 2010 21:27:13 -0500

Also.. dumb, but I just checked the achives.. I uploaded shots eons ago
of
my 4 door cowling in Rebel - Cowling.. where else! lol

----- Original Message -----
From: "Wayne G. O'Shea" <oifa@irishfield.on.ca>
To: <rebel-builders@dcsol.com>
Sent: Wednesday, December 01, 2010 7:28 PM
Subject: Re: [rebel-builders] 4 door cowl-air box

BTW.. I've seen many variations over the years. That one is my own
airplane.. 15 years.. I'd still do it the same way! Notice the extra
cowl
"flaps" I had to add for cooling on floats though.

----- Original Message -----
From: "mike jones" <mfjrebel007r@cogeco.ca>
To: <rebel-builders@dcsol.com>
Sent: Wednesday, December 01, 2010 10:23 PM
Subject: RE: [rebel-builders] 4 door cowl-air box

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Posted: **Sun Feb 19, 2012 8:07 pm**

I am getting ready to install the lower cowl airbox and would be interested
in seeing those photos also if it's convenient.
Charlie E. 802R
charlie @troyairpark.com

----- Original Message -----
From: "Jesse Jenks" <jessejenks@hotmail.com>
To: "Builders list" <rebel-builders@dcsol.com>
Sent: Wednesday, December 01, 2010 2:06 PM
Subject: RE: [rebel-builders] 4 door cowl-air box

Mike,
I have the nosebowl to front baffle area pretty much under control now,
but if you have some pics of your lower cowl and airbox area that would be
great.
Thanks.

Subject: RE: [rebel-builders] 4 door cowl-air box
Date: Wed, 1 Dec 2010 14:54:28 -0500
From: Michael.Jones@snclavalin.com
To: rebel-builders@dcsol.com

I still owe you some pics of my partial cowl, will try to send this
weekend

cheers

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of
Jesse Jenks
Sent: December 1, 2010 2:45 PM
To: Builders list
Subject: RE: [rebel-builders] 4 door cowl-air box

That's a good point Mike. I'll give it some more thought.

Subject: RE: [rebel-builders] 4 door cowl-air box
Date: Wed, 1 Dec 2010 10:52:19 -0500
From: Michael.Jones@snclavalin.com
To: rebel-builders@dcsol.com

Jesse

I think it should be sealed as good as possible, if air flows in
through
it the hot air from the cylinders might not flow easily out the bottom
due to the cold air flow in and maybe up from below

Most I have seen seem to be boxed in, I have several variations on
mine
and cant decide the best or simplest design, some are easy to make som
are hard to make

Cheers

Mike#007

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com] On Behalf Of
Jesse Jenks
Sent: December 1, 2010 10:31 AM
To: Builders list
Subject: [rebel-builders] 4 door cowl-air box

For those of you with the 4 door, what is typically done where the
carb
air box protrudes through the bottom spine? It looks like most people
box in around it, but can it just hang out in the airstream? Also,
should there be some sort of gap seal material between the air box and
the cowl, or just leave enough space so they don't rub? It doesn't
seem
like a critical area as far as air flow/engine cooling.
Thanks.
jesse

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Posted: **Sun Feb 19, 2012 8:07 pm**

Wayne,
Thanks for the reply in what must be a stressful time for you.
I'll have to lower the outlet area to at least 5" anyway to have clearance for the carb heat scat tube and control linkage. After considering what you said about the curve making it so you don't get enough outlet area I'll try to make the center section a bit wider That should increase the area some, and I think I'll bend a lip into the rear edge of the center section and the doors before they start to curve too much. That should help create a low pressure (like Roger Hoffman did). I wish I had my exhaust in hand so I could see how that is going to interfere with the center section if I make it too wide. What do you think about maximizing the width at the aft end and tapering it to the nosebowl? Would require another set of angles at the hinge line, and would cause the doors to open into the prop arc a little, but that shouldn't be a problem.
Thanks.
Jesse

From: oifa@irishfield.on.ca
To: rebel-builders@dcsol.com
Subject: Re: [rebel-builders] 4 door cowl-air box
Date: Sat, 4 Dec 2010 20:27:47 -0500

Sorry.. was at the daughters. Lowering the airbox area hinges won't buy you
much extra outlet sq inches due to the way the door wraps around the lower
edge of the fus/firewall corner. My fix cowl flaps add about 45 sq inches of
outlet.

As for the hinge/angle combo.. it's just the angle your see.. attaching on
the outside of the nose bowl lip and the hinge that holds the nut plate for
the screw and goes on the inside, with the .025 material sandwiched between
the two that closes off the area ahead and behind the inlet filter.

As for tightness.. you can be pretty snug with a conical mount.. with a
dynafocal you need at LEAST 1/2" all around.. and you'd seal that with some
really soft weather strip material or silcon baffle seal material. Conical
mount.. can be almost touching and IMHO doesn't require any seal..

Wayne

----- Original Message -----
From: "Jesse Jenks" <jessejenks@hotmail.com>
To: "Builders list" <rebel-builders@dcsol.com>
Sent: Thursday, December 02, 2010 11:10 AM
Subject: RE: [rebel-builders] 4 door cowl-air box

Wayne,
Thanks for the pics, that's very helpful. I have also been looking at your
pics on the archives btw. So, would you advise building the lower cowl
deeper in anticipation of cooling issues on floats, or just wait and see
what I get? The fixed cowl flaps look fine anyway though, so I wouldn't
mind doing that later. I was planning to put the lower cowl 3 1/2" below
the firewall. What do you think? I am also putting a lot of work into the
inlet area/front baffles, so should have a good amount of inlet air.
Regarding your caution about having the airbox too close to the
surrounding cowl, It does look like you have a pretty tight fit. What
would you consider adequate clearance there, like 1/4"? Do you use
something like weatherstripping tape to seal around it, or just leave an
air gap? You have your channel flanges facing down to create the contour
around the airbox (which I like), are there additional angle flanges on
the inside of your bottom support?
It looks like you have a carb air temp sensor. Do you find that a useful
addition?
Hope all my questions aren't too annoying. Thanks again.
Jesse

From: oifa@irishfield.on.ca
To: rebel-builders@dcsol.com
Subject: Re: [rebel-builders] 4 door cowl-air box
Date: Wed, 1 Dec 2010 21:27:13 -0500

Also.. dumb, but I just checked the achives.. I uploaded shots eons ago
of
my 4 door cowling in Rebel - Cowling.. where else! lol

----- Original Message -----
From: "Wayne G. O'Shea" <oifa@irishfield.on.ca>
To: <rebel-builders@dcsol.com>
Sent: Wednesday, December 01, 2010 7:28 PM
Subject: Re: [rebel-builders] 4 door cowl-air box

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