Speaking of Cooling

We just recently tore into an engine that had been sloppily cowled in an
experimental airplane. The bottom was fine but the top was cooked.
Cylinders, you could tell, had been fried, most likely because they had not
been baffled and cowled properly. Pistons, valves, cylinder walls, rings,
guides, seats --- all looked like they had been through hell.

Larry Smith writes:
We just recently tore into an engine that had been sloppily cowled in an
experimental airplane. The bottom was fine but the top was cooked.
------------------------------------------------------

I stopped being surprised at that when Nixon was President :-)

Ask them what cooling-air pressure differential they were running, they just
look at you.

The problem is even worse with converted VW's since the ignorance is usually
sold along with the engine. Rather than telling them how to keep the thing
cool and how many hours they can expect between valve jobs, one outfit actually
claims their VW conversion will rust out before they'll wear out :-)

-R.S.Hoover

"Veeduber" wrote in message
...
Larry Smith writes:
We just recently tore into an engine that had been sloppily cowled in an
experimental airplane. The bottom was fine but the top was cooked.
------------------------------------------------------

I stopped being surprised at that when Nixon was President :-)

Ask them what cooling-air pressure differential they were running, they
just
look at you.

The problem is even worse with converted VW's since the ignorance is
usually
sold along with the engine. Rather than telling them how to keep the
thing
cool and how many hours they can expect between valve jobs, one outfit
actually
claims their VW conversion will rust out before they'll wear out :-)

-R.S.Hoover



Not the same one that claims 100 HP, is it?
--
Jim in NC

On 22 Sep 2003 00:07:25 GMT, (Veeduber) wrote:

Larry Smith writes:
We just recently tore into an engine that had been sloppily cowled in an
experimental airplane. The bottom was fine but the top was cooked.
------------------------------------------------------

I stopped being surprised at that when Nixon was President :-)

Ask them what cooling-air pressure differential they were running, they just
look at you.

The problem is even worse with converted VW's since the ignorance is usually
sold along with the engine. Rather than telling them how to keep the thing
cool and how many hours they can expect between valve jobs, one outfit actually
claims their VW conversion will rust out before they'll wear out :-)

-R.S.Hoover


that a great claim :-) in other words: our oil picks up so much
moisture that it destroys the engine!

Stealth Pilot

Veeduber wrote ...

It's even sillier than that. They show a cooling system that guarantees the
area around the exhaust valves -- the hottest part of the engine toward which
VW directs the bulk of the cooling air -- will get NO AIR AT ALL. (Kinda hard
to keep an air-cooled engine cool without any air :-)

Read it for yourself; infomercial in the May issue of 'Sport Aviation'. Even
funnier was having the Air Apparent pop up on the AirVW mailing list to defend
the engine's lack of cylinder head cooling with pseudo-science.

The tricky bit is the way they've mounted the CHT sensor so it gets cooled by
an air-blast. Then measuring the temperature of the crankcase rather than the
oil inside it. Not too hard to 'prove' an engine always runs cool, eh? :-)

-R.S.Hoover



A guy named Bill once wrote: "Ignorance is the curse of God, Knowledge
the wing wherewith we fly to heaven."

Regarding ignorance part, one definition holds to be "A willful
neglect [of]
knowledge". There's no shortage of that type of ignorance on the part
of some
vendors.

Daniel