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Fresh air hood

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Terry McClary

Fresh air hood

Post by Terry McClary » Fri Feb 17, 2012 8:26 pm

of one, LOTS of ventilation (or a fresh air hood system as I now
use) will take care of the other.

Have fun,
Wayne G. O'Shea
www.irishfield.on.ca
---------
Wayne,

Did you make your fresh air system or buy one of the commercial units?

Terry McClary
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Wayne G. O'Shea

Fresh air hood

Post by Wayne G. O'Shea » Fri Feb 17, 2012 8:26 pm

--------------------------------------------------------------------------
Your following message has been delivered to the 166 members of
the list murphy-rebel@dcsol.com at 22:25:29 on 24 Sep 2000.
--------------------------------------------------------------------------


Terry, considering I am continually working with these "great" isocynate
ladden products, I purchased a commercial unit 2 years ago that will supply
3 workers on 50 foot hoses (2 on 100 foot). Wasn't cheap at approximately
$3800 Cdn. complete with 2 hoods and 2 x 50' hoses, but I tend to think my
life is worth at least that much! (this unit is definitely overkill for
building a single Rebel, but something similar should be used if also
building a set of floats, due to the extended time you will be using either
proseal or my favorite Sikaflex 1A. during their construction)

I'm sure you could make your own with a quality vane pump and good micron
filters on the inlet and outlets. IF anyone is interested in the CFM etc of
my unit just ask and I will dig out the paperwork for the unit. Mine uses an
adjustable "dump" pressure valve to relieve the excess air flow. One worker
needs 9 to 11 psi at the hose connector manifold and 13 to 15 psi for two
people.

Regards,
Wayne G. O'Shea
www.irishfield.on.ca

----- Original Message -----
From: "Terry McClary" <tlmcclary@juno.com>
To: <murphy-rebel@dcsol.com>
Sent: Sunday, September 24, 2000 9:38 PM
Subject: Fresh air hood

of one, LOTS of ventilation (or a fresh air hood system as I now
use) will take care of the other.

Have fun,
Wayne G. O'Shea
www.irishfield.on.ca
---------
Wayne,

Did you make your fresh air system or buy one of the commercial units?

Terry McClary
*---------------------------------------------------------------------------
--------*
The Murphy Rebel Builders List is for the discussion
between builders and owners of Murphy Rebel aircraft.
Archives located at:
http://www.dcsol.com/murphy-rebel/lists/default.htm
*---------------------------------------------------------------------------
--------*

*-----------------------------------------------------------------------------------*
The Murphy Rebel Builders List is for the discussion
between builders and owners of Murphy Rebel aircraft.
Archives located at:
http://www.dcsol.com/murphy-rebel/lists/default.htm
*-----------------------------------------------------------------------------------*




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Terry McClary

Fresh air hood

Post by Terry McClary » Fri Feb 17, 2012 8:26 pm

Wayne,

I agree that your life and health are worth what you paid for the unit.
As you also said, a bit pricey for one Rebel though.

I looked at several displays at Oshkosh and it seems like it is going to
take $400-500 US for a commercial unit. From listening to the high pitch
whine of the units being demonstrated at Oshkosh, I have thought about
buying a shop vacuum and using it for the air source. The way the motors
sounded I'm not certain that the pump in the store bought unit isn't from
a shop vac.

There is a fellow that is a member of my local EAA chapter that made a
unit from the smog pump from an old automobile. I haven't been able to
talk with him to get the details of his design. After I gather the facts
I will decide which way to go.

Also, wanted to say thanks on the advice to build a jig for the
flaperons. I read your message to me and then struggled with whether it
would be worth the time to build a jig for 4 parts that aren't that
complex. I built the jig and with 1 done and the 2nd part jigged and
ready to go, I realized that it was worth the time for repeatability
without a lot of hassle.

Thanks again for all the wisdom shared,

Terry McClary

On Sun, 24 Sep 2000 22:23:56 -0400 "Wayne G. O'Shea"
<oifa@irishfield.on.ca> writes:
Terry, considering I am continually working with these "great"
isocynate
ladden products, I purchased a commercial unit 2 years ago that will
supply
3 workers on 50 foot hoses (2 on 100 foot). Wasn't cheap at
approximately
$3800 Cdn. complete with 2 hoods and 2 x 50' hoses, but I tend to
think my
life is worth at least that much! (this unit is definitely overkill
for
building a single Rebel, but something similar should be used if
also
building a set of floats, due to the extended time you will be using
either
proseal or my favorite Sikaflex 1A. during their construction)

I'm sure you could make your own with a quality vane pump and good
micron
filters on the inlet and outlets. IF anyone is interested in the CFM
etc of
my unit just ask and I will dig out the paperwork for the unit. Mine
uses an
adjustable "dump" pressure valve to relieve the excess air flow. One
worker
needs 9 to 11 psi at the hose connector manifold and 13 to 15 psi
for two
people.

Regards,
Wayne G. O'Shea
www.irishfield.on.ca

----- Original Message -----
From: "Terry McClary" <tlmcclary@juno.com>
To: <murphy-rebel@dcsol.com>
Sent: Sunday, September 24, 2000 9:38 PM
Subject: Fresh air hood

of one, LOTS of ventilation (or a fresh air hood system as I
now
use) will take care of the other.

Have fun,
Wayne G. O'Shea
www.irishfield.on.ca
---------
Wayne,

Did you make your fresh air system or buy one of the commercial
units?
Terry McClary
*------------------------------------------------------------------------
---
--------*
The Murphy Rebel Builders List is for the discussion
between builders and owners of Murphy Rebel aircraft.
Archives located at:
http://www.dcsol.com/murphy-rebel/lists/default.htm
*------------------------------------------------------------------------
---
--------*

-------------------------------------------------------------------------
-----*
The Murphy Rebel Builders List is for the discussion
between builders and owners of Murphy Rebel aircraft.
Archives located at:
http://www.dcsol.com/murphy-rebel/lists/default.htm
*------------------------------------------------------------------------
-----------*
*-----------------------------------------------------------------------------------*
The Murphy Rebel Builders List is for the discussion
between builders and owners of Murphy Rebel aircraft.
Archives located at:
http://www.dcsol.com/murphy-rebel/lists/default.htm
*-----------------------------------------------------------------------------------*




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klehman

Fresh air hood

Post by klehman » Fri Feb 17, 2012 8:26 pm

Terry

That's exactly what they appear to be. Have seen similar motors in the
surplus places. About 1.5 to 2 amps which is pretty small for a vacuum
but that's what they look like when you open them up. A small shop vac
would work fine if you can cobble together the mask and hose. Some
commercial units just use the same little round hepa particulate filter
that fits a face mask at the air inlet to the motor. You don't want to
use any kind of compressor that can introduce oil into the air so vacuum
type motors are preferable. One of the magazines recently did an article
on building your own as well.

The hvlp paint sprayer motors are also 8 to 10 amp vacuum cleaner
motors.
Mine is just a three stage unit from a central vac.

Ken.

Terry McClary wrote:
From listening to the high pitch
whine of the units being demonstrated at Oshkosh, I have thought about
buying a shop vacuum and using it for the air source. The way the motors
sounded I'm not certain that the pump in the store bought unit isn't from
a shop vac.
*-----------------------------------------------------------------------------------*
The Murphy Rebel Builders List is for the discussion
between builders and owners of Murphy Rebel aircraft.
Archives located at:
http://www.dcsol.com/murphy-rebel/lists/default.htm
*-----------------------------------------------------------------------------------*




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David Ricker

Fresh air hood

Post by David Ricker » Fri Feb 17, 2012 8:26 pm

Terry

I suspect the reason the fresh air system sounds like a shop vac is that they probably
both use a centrifugal blower.

If you have a shop vac then I would suggest that you try it and see if you think it is
enough before paying the price of the professional unit. This is what I did and I am
satisfied that it is adequate for the job. It will not be the same as the commercial
unit in that it will not put out the pressure levels Wayne talked about but I am not sure
that you need that either. Of course you will have to come up with some sort of hood to
contain the fresh air in as well.

My setup uses about 30 ft of 3/4" ID tubing from the vac (located outside the workshop)
to a home made fabric hood which is attached to a commercial face shield (like you would
wear using a grinder or similar tools). With this setup I have a good supply of fresh
air and I do not worry about inhaling fumes from painting etc.

If you already have the shop vac it is worth thinking about.

Dave R.

Terry McClary wrote:
Wayne,

I agree that your life and health are worth what you paid for the unit.
As you also said, a bit pricey for one Rebel though.

I looked at several displays at Oshkosh and it seems like it is going to
take $400-500 US for a commercial unit. From listening to the high pitch
whine of the units being demonstrated at Oshkosh, I have thought about
buying a shop vacuum and using it for the air source. The way the motors
sounded I'm not certain that the pump in the store bought unit isn't from
a shop vac.

There is a fellow that is a member of my local EAA chapter that made a
unit from the smog pump from an old automobile. I haven't been able to
talk with him to get the details of his design. After I gather the facts
I will decide which way to go.

Also, wanted to say thanks on the advice to build a jig for the
flaperons. I read your message to me and then struggled with whether it
would be worth the time to build a jig for 4 parts that aren't that
complex. I built the jig and with 1 done and the 2nd part jigged and
ready to go, I realized that it was worth the time for repeatability
without a lot of hassle.

Thanks again for all the wisdom shared,

Terry McClary

On Sun, 24 Sep 2000 22:23:56 -0400 "Wayne G. O'Shea"
<oifa@irishfield.on.ca> writes:
Terry, considering I am continually working with these "great"
isocynate
ladden products, I purchased a commercial unit 2 years ago that will
supply
3 workers on 50 foot hoses (2 on 100 foot). Wasn't cheap at
approximately
$3800 Cdn. complete with 2 hoods and 2 x 50' hoses, but I tend to
think my
life is worth at least that much! (this unit is definitely overkill
for
building a single Rebel, but something similar should be used if
also
building a set of floats, due to the extended time you will be using
either
proseal or my favorite Sikaflex 1A. during their construction)

I'm sure you could make your own with a quality vane pump and good
micron
filters on the inlet and outlets. IF anyone is interested in the CFM
etc of
my unit just ask and I will dig out the paperwork for the unit. Mine
uses an
adjustable "dump" pressure valve to relieve the excess air flow. One
worker
needs 9 to 11 psi at the hose connector manifold and 13 to 15 psi
for two
people.

Regards,
Wayne G. O'Shea
www.irishfield.on.ca

----- Original Message -----
From: "Terry McClary" <tlmcclary@juno.com>
To: <murphy-rebel@dcsol.com>
Sent: Sunday, September 24, 2000 9:38 PM
Subject: Fresh air hood

now
---------
Wayne,

Did you make your fresh air system or buy one of the commercial
units?
Terry McClary
*------------------------------------------------------------------------
---
--------*
The Murphy Rebel Builders List is for the discussion
between builders and owners of Murphy Rebel aircraft.
Archives located at:
http://www.dcsol.com/murphy-rebel/lists/default.htm
*------------------------------------------------------------------------
---
--------*

-------------------------------------------------------------------------
-----*
The Murphy Rebel Builders List is for the discussion
between builders and owners of Murphy Rebel aircraft.
Archives located at:
http://www.dcsol.com/murphy-rebel/lists/default.htm
*------------------------------------------------------------------------
-----------*
*-----------------------------------------------------------------------------------*
The Murphy Rebel Builders List is for the discussion
between builders and owners of Murphy Rebel aircraft.
Archives located at:
http://www.dcsol.com/murphy-rebel/lists/default.htm
*-----------------------------------------------------------------------------------*
--
David A. Ricker P. Eng.
DARTEC Engineering Inc.
3 Tamarac Drive
Fall River, Nova Scotia
Canada, B2T 1E8
ricker@dbis.ns.ca
Ph. 902-860-0256


*-----------------------------------------------------------------------------------*
The Murphy Rebel Builders List is for the discussion
between builders and owners of Murphy Rebel aircraft.
Archives located at:
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*-----------------------------------------------------------------------------------*




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-----------------------------------------------------------------


Wayne G. O'Shea

Fresh air hood

Post by Wayne G. O'Shea » Fri Feb 17, 2012 8:26 pm

--------------------------------------------------------------------------
Your following message has been delivered to the 166 members of
the list murphy-rebel@dcsol.com at 17:56:28 on 29 Sep 2000.
--------------------------------------------------------------------------



Just thought I would pass this on! Anyone that lives in the Woodstock,
Ontario area may be interested in an advert I just pulled out of the "Tri
ad" (bargain hunter kind of thing).

Breathing Apparatus: Machine can supply air for 2 men. Comes with 50 feet of
hose and paint and sand blasting hood. 120 volt single phase PRICE $475.
Call Art at 519-537-6490 WOODSTOCK

Regards,
Wayne G. O'Shea
www.irishfield.on.ca


*-----------------------------------------------------------------------------------*
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between builders and owners of Murphy Rebel aircraft.
Archives located at:
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*-----------------------------------------------------------------------------------*




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