Re: [MBZ] Dense Intercooling
Oops! Shaky finger did it again. I MEANT ~ - 1 degree C/300 feet rise in
altitude, or ~ - 3.3 degrees C/1000 feet rise in alt.
Wilton
- Original Message -
From: WILTON wilt...@nc.rr.com
To: Mercedes Discussion List mercedes@okiebenz.com
Sent: Tuesday, October 02, 2012 10:26 PM
Subject: Re: [MBZ] Dense Intercooling
Dry (unsaturated air) adiabatic lapse rate = ~ -5 degrees F/1000 feet rise
in altitude and ~ -1 degree C/3000 feet rise in altitude.
Wilton
- Original Message -
From: G Mann g2ma...@gmail.com
To: Mercedes Discussion List mercedes@okiebenz.com
Sent: Tuesday, October 02, 2012 9:05 PM
Subject: Re: [MBZ] Dense Intercooling
OOOooopps.. typo..
Should read:
Rise in altitude and DROP in temp
On Tue, Oct 2, 2012 at 6:02 PM, G Mann g2ma...@gmail.com wrote:
Hendrik
Point well made. True, as you go up in altitude.. temps drop.. [as a
rule
of thumb, 1 degree F per thousand ft. {same rule, different math for
meter/Centigrade}]. However, along with that rise in altitude, and
temp,
you also have a lowering in air density.. In the brief comments
previous, I
did not make that distinction. {ask an engineer how to sharpen a pencil
he
says... first cut down a tree etc etc]
Naturally, to design a charge air cooler system it needs to take into
account properly such things as ambient air density, and temperature...
and
compensate for those factors..
Thus, the well employed engineers with car companies. or... you
could
do what the hood scope buy did in the Original posting... and just
throw
enough S*($#t against the wall until some of it sticks and call it
good.
I wonder what the wind tunnel flow separation numbers look like on the
hood scope
Smiles
Grant
On Tue, Oct 2, 2012 at 5:27 PM, Hendrik Fay
heni...@ozemail.com.auwrote:
That's interesting, I would have thought that even though the air is
less
dense at altitude it is also a lot colder.
Also I found that Diesel engines work better at night, which I guess
may
be down to air density?
Hendrik
who is dense
On 03/10/12 09:03, relng...@aol.com wrote:
The important thing is to lower the temp of the compressed air to make
it
more dense and thus lower the CHT. Intercoolers have been around since
at
least WW2 and are common in turbocharged gas engines. Including
aircraft. Even
so and intercooler or not, big-inch Continental aircraft engines can
overheat at high altitudes.
And a bit OT, there is a new French built 4-cylinder Jet-A engine
available
in the Cessna 172 that is intercooled and pulls nearly 100 inches of
manifold pressure. It is a compression ignition engine but is built
for
Jet-A, not
diesel fuel.
Costs about $500K, BTW.
RLE
__**_
http://www.okiebenz.com
For new and used parts go to www.okiebenz.com
To search list archives
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Re: [MBZ] Dense Intercooling
That's interesting, I would have thought that even though the air is less dense at altitude it is also a lot colder. Also I found that Diesel engines work better at night, which I guess may be down to air density? Hendrik who is dense On 03/10/12 09:03, relng...@aol.com wrote: The important thing is to lower the temp of the compressed air to make it more dense and thus lower the CHT. Intercoolers have been around since at least WW2 and are common in turbocharged gas engines. Including aircraft. Even so and intercooler or not, big-inch Continental aircraft engines can overheat at high altitudes. And a bit OT, there is a new French built 4-cylinder Jet-A engine available in the Cessna 172 that is intercooled and pulls nearly 100 inches of manifold pressure. It is a compression ignition engine but is built for Jet-A, not diesel fuel. Costs about $500K, BTW. RLE ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Dense Intercooling
Hendrik
Point well made. True, as you go up in altitude.. temps drop.. [as a rule
of thumb, 1 degree F per thousand ft. {same rule, different math for
meter/Centigrade}]. However, along with that rise in altitude, and temp,
you also have a lowering in air density.. In the brief comments previous, I
did not make that distinction. {ask an engineer how to sharpen a pencil he
says... first cut down a tree etc etc]
Naturally, to design a charge air cooler system it needs to take into
account properly such things as ambient air density, and temperature... and
compensate for those factors..
Thus, the well employed engineers with car companies. or... you could
do what the hood scope buy did in the Original posting... and just throw
enough S*($#t against the wall until some of it sticks and call it good.
I wonder what the wind tunnel flow separation numbers look like on the
hood scope
Smiles
Grant
On Tue, Oct 2, 2012 at 5:27 PM, Hendrik Fay heni...@ozemail.com.auwrote:
That's interesting, I would have thought that even though the air is less
dense at altitude it is also a lot colder.
Also I found that Diesel engines work better at night, which I guess may
be down to air density?
Hendrik
who is dense
On 03/10/12 09:03, relng...@aol.com wrote:
The important thing is to lower the temp of the compressed air to make it
more dense and thus lower the CHT. Intercoolers have been around since at
least WW2 and are common in turbocharged gas engines. Including aircraft.
Even
so and intercooler or not, big-inch Continental aircraft engines can
overheat at high altitudes.
And a bit OT, there is a new French built 4-cylinder Jet-A engine
available
in the Cessna 172 that is intercooled and pulls nearly 100 inches of
manifold pressure. It is a compression ignition engine but is built for
Jet-A, not
diesel fuel.
Costs about $500K, BTW.
RLE
__**_
http://www.okiebenz.com
For new and used parts go to www.okiebenz.com
To search list archives
http://www.okiebenz.com/**archive/http://www.okiebenz.com/archive/
To Unsubscribe or change delivery options go to:
http://mail.okiebenz.com/**mailman/listinfo/mercedes_**okiebenz.comhttp://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
___
http://www.okiebenz.com
For new and used parts go to www.okiebenz.com
To search list archives http://www.okiebenz.com/archive/
To Unsubscribe or change delivery options go to:
http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Dense Intercooling
OOOooopps.. typo..
Should read:
Rise in altitude and DROP in temp
On Tue, Oct 2, 2012 at 6:02 PM, G Mann g2ma...@gmail.com wrote:
Hendrik
Point well made. True, as you go up in altitude.. temps drop.. [as a rule
of thumb, 1 degree F per thousand ft. {same rule, different math for
meter/Centigrade}]. However, along with that rise in altitude, and temp,
you also have a lowering in air density.. In the brief comments previous, I
did not make that distinction. {ask an engineer how to sharpen a pencil he
says... first cut down a tree etc etc]
Naturally, to design a charge air cooler system it needs to take into
account properly such things as ambient air density, and temperature... and
compensate for those factors..
Thus, the well employed engineers with car companies. or... you could
do what the hood scope buy did in the Original posting... and just throw
enough S*($#t against the wall until some of it sticks and call it good.
I wonder what the wind tunnel flow separation numbers look like on the
hood scope
Smiles
Grant
On Tue, Oct 2, 2012 at 5:27 PM, Hendrik Fay heni...@ozemail.com.auwrote:
That's interesting, I would have thought that even though the air is less
dense at altitude it is also a lot colder.
Also I found that Diesel engines work better at night, which I guess may
be down to air density?
Hendrik
who is dense
On 03/10/12 09:03, relng...@aol.com wrote:
The important thing is to lower the temp of the compressed air to make it
more dense and thus lower the CHT. Intercoolers have been around since at
least WW2 and are common in turbocharged gas engines. Including
aircraft. Even
so and intercooler or not, big-inch Continental aircraft engines can
overheat at high altitudes.
And a bit OT, there is a new French built 4-cylinder Jet-A engine
available
in the Cessna 172 that is intercooled and pulls nearly 100 inches of
manifold pressure. It is a compression ignition engine but is built for
Jet-A, not
diesel fuel.
Costs about $500K, BTW.
RLE
__**_
http://www.okiebenz.com
For new and used parts go to www.okiebenz.com
To search list archives
http://www.okiebenz.com/**archive/http://www.okiebenz.com/archive/
To Unsubscribe or change delivery options go to:
http://mail.okiebenz.com/**mailman/listinfo/mercedes_**okiebenz.comhttp://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
___
http://www.okiebenz.com
For new and used parts go to www.okiebenz.com
To search list archives http://www.okiebenz.com/archive/
To Unsubscribe or change delivery options go to:
http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Dense Intercooling
Dry (unsaturated air) adiabatic lapse rate = ~ -5 degrees F/1000 feet rise
in altitude and ~ -1 degree C/3000 feet rise in altitude.
Wilton
- Original Message -
From: G Mann g2ma...@gmail.com
To: Mercedes Discussion List mercedes@okiebenz.com
Sent: Tuesday, October 02, 2012 9:05 PM
Subject: Re: [MBZ] Dense Intercooling
OOOooopps.. typo..
Should read:
Rise in altitude and DROP in temp
On Tue, Oct 2, 2012 at 6:02 PM, G Mann g2ma...@gmail.com wrote:
Hendrik
Point well made. True, as you go up in altitude.. temps drop.. [as a rule
of thumb, 1 degree F per thousand ft. {same rule, different math for
meter/Centigrade}]. However, along with that rise in altitude, and
temp,
you also have a lowering in air density.. In the brief comments previous,
I
did not make that distinction. {ask an engineer how to sharpen a pencil
he
says... first cut down a tree etc etc]
Naturally, to design a charge air cooler system it needs to take into
account properly such things as ambient air density, and temperature...
and
compensate for those factors..
Thus, the well employed engineers with car companies. or... you could
do what the hood scope buy did in the Original posting... and just
throw
enough S*($#t against the wall until some of it sticks and call it
good.
I wonder what the wind tunnel flow separation numbers look like on the
hood scope
Smiles
Grant
On Tue, Oct 2, 2012 at 5:27 PM, Hendrik Fay
heni...@ozemail.com.auwrote:
That's interesting, I would have thought that even though the air is
less
dense at altitude it is also a lot colder.
Also I found that Diesel engines work better at night, which I guess may
be down to air density?
Hendrik
who is dense
On 03/10/12 09:03, relng...@aol.com wrote:
The important thing is to lower the temp of the compressed air to make
it
more dense and thus lower the CHT. Intercoolers have been around since
at
least WW2 and are common in turbocharged gas engines. Including
aircraft. Even
so and intercooler or not, big-inch Continental aircraft engines can
overheat at high altitudes.
And a bit OT, there is a new French built 4-cylinder Jet-A engine
available
in the Cessna 172 that is intercooled and pulls nearly 100 inches of
manifold pressure. It is a compression ignition engine but is built for
Jet-A, not
diesel fuel.
Costs about $500K, BTW.
RLE
__**_
http://www.okiebenz.com
For new and used parts go to www.okiebenz.com
To search list archives
http://www.okiebenz.com/**archive/http://www.okiebenz.com/archive/
To Unsubscribe or change delivery options go to:
http://mail.okiebenz.com/**mailman/listinfo/mercedes_**okiebenz.comhttp://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
___
http://www.okiebenz.com
For new and used parts go to www.okiebenz.com
To search list archives http://www.okiebenz.com/archive/
To Unsubscribe or change delivery options go to:
http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
___
http://www.okiebenz.com
For new and used parts go to www.okiebenz.com
To search list archives http://www.okiebenz.com/archive/
To Unsubscribe or change delivery options go to:
http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
