Today's Message Index:
----------------------
1. 01:09 PM - Re: Exhaust Tailpipe Question (William Bernard)
2. 01:30 PM - Re: Exhaust Tailpipe Question (George Turner)
3. 01:30 PM - Re: Exhaust Tailpipe Question (George Turner)
Message 1
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| Subject: | Re: Exhaust Tailpipe Question |
--> Tailwind-List message posted by: "William Bernard" <billbernard@worldnet.att.net>
Jim, A Mustang II builder named Kent Paser has done a lot of experimentation
on going fast and has also written a book about it, "Speed With Ecomony"
In his chapter on exhaust systems, he says the the exhaust pipes pointing
parallel to the bottom of the fuselage give some 'jet thrust'. He also
relates a story in which, during an experiment, the exhaust tips turned
upward and melted the aluminum belly.
Exhaust gasses are in the range of 1400-1600 degrees F and so you don't want
them pointed at the airplane, unless perhaps it's made of titanium or
inconel X. Maybe a good compromise might be to have the pipes exit at a
slight angle away from the belly.
BTW Kent's book offers a lot of tips applicable to any aircraft, to increase
performance. I got my copy at buildersbookstore.com, if I remember
correctly.
Bill
----- Original Message -----
From: <Mcculleyja@aol.com>
Subject: Tailwind-List: Exhaust Tailpipe Question
> --> Tailwind-List message posted by: Mcculleyja@aol.com
>
> Does any measured temperature data or other information exist to identify
how
> far below the ship's belly the end of the tailpipe must be and how far
ahead
> of the start of the fabric it must terminate to avoid overheating the
fabric?
> Has anyone successfully (i.e. safely) run their tailpipe(s) essentially
> parallel to the airflow below the belly to create less turbulence and to
take
> advantage of the available jet thrust from the exhaust gases exiting
parallel
> to the flight path? What are some typical measurements and angles at the
> exit end of the pipes that existing installations use?
>
> Jim McCulley
> (Seeing light ahead in the tunnel)
>
>
Message 2
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| Subject: | Re: Exhaust Tailpipe Question |
--> Tailwind-List message posted by: George Turner <tailwind222@yahoo.com>
I believe Jim Clement's pipes exit where the engine air exits so they are not in
the slip stream and they point mostly back and down a little. George....Phoenix
William Bernard <billbernard@worldnet.att.net> wrote:--> Tailwind-List message
posted by: "William Bernard"
Jim, A Mustang II builder named Kent Paser has done a lot of experimentation
on going fast and has also written a book about it, "Speed With Ecomony"
In his chapter on exhaust systems, he says the the exhaust pipes pointing
parallel to the bottom of the fuselage give some 'jet thrust'. He also
relates a story in which, during an experiment, the exhaust tips turned
upward and melted the aluminum belly.
Exhaust gasses are in the range of 1400-1600 degrees F and so you don't want
them pointed at the airplane, unless perhaps it's made of titanium or
inconel X. Maybe a good compromise might be to have the pipes exit at a
slight angle away from the belly.
BTW Kent's book offers a lot of tips applicable to any aircraft, to increase
performance. I got my copy at buildersbookstore.com, if I remember
correctly.
Bill
----- Original Message -----
From:
Subject: Tailwind-List: Exhaust Tailpipe Question
> --> Tailwind-List message posted by: Mcculleyja@aol.com
>
> Does any measured temperature data or other information exist to identify
how
> far below the ship's belly the end of the tailpipe must be and how far
ahead
> of the start of the fabric it must terminate to avoid overheating the
fabric?
> Has anyone successfully (i.e. safely) run their tailpipe(s) essentially
> parallel to the airflow below the belly to create less turbulence and to
take
> advantage of the available jet thrust from the exhaust gases exiting
parallel
> to the flight path? What are some typical measurements and angles at the
> exit end of the pipes that existing installations use?
>
> Jim McCulley
> (Seeing light ahead in the tunnel)
>
>
---------------------------------
Message 3
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| Subject: | Re: Exhaust Tailpipe Question |
--> Tailwind-List message posted by: George Turner <tailwind222@yahoo.com>
I believe Jim Clement's pipes exit where the engine air exits so they are not in
the slip stream and they point mostly back and down a little. George....Phoenix
William Bernard <billbernard@worldnet.att.net> wrote: --> Tailwind-List message
posted by: "William Bernard"
Jim, A Mustang II builder named Kent Paser has done a lot of experimentation
on going fast and has also written a book about it, "Speed With Ecomony"
In his chapter on exhaust systems, he says the the exhaust pipes pointing
parallel to the bottom of the fuselage give some 'jet thrust'. He also
relates a story in which, during an experiment, the exhaust tips turned
upward and melted the aluminum belly.
Exhaust gasses are in the range of 1400-1600 degrees F and so you don't want
them pointed at the airplane, unless perhaps it's made of titanium or
inconel X. Maybe a good compromise might be to have the pipes exit at a
slight angle away from the belly.
BTW Kent's book offers a lot of tips applicable to any aircraft, to increase
performance. I got my copy at buildersbookstore.com, if I remember
correctly.
Bill
----- Original Message -----
From:
Subject: Tailwind-List: Exhaust Tailpipe Question
> --> Tailwind-List message posted by: Mcculleyja@aol.com
>
> Does any measured temperature data or other information exist to identify
how
> far below the ship's belly the end of the tailpipe must be and how far
ahead
> of the start of the fabric it must terminate to avoid overheating the
fabric?
> Has anyone successfully (i.e. safely) run their tailpipe(s) essentially
> parallel to the airflow below the belly to create less turbulence and to
take
> advantage of the available jet thrust from the exhaust gases exiting
parallel
> to the flight path? What are some typical measurements and angles at the
> exit end of the pipes that existing installations use?
>
> Jim McCulley
> (Seeing light ahead in the tunnel)
>
>
---------------------------------
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