what every boy needs - yeah seriously

fan-cooled VW/Porsche http://popnet.ch/reichen/HB207/image035.htm

it's the powerplant of a ALFA HB 207, quite a few flying here in Europe
http://popnet.ch/reichen/HB207/index.htm


"Anyolmouse" schrieb im Newsbeitrag
...

wrote in message
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On Jan 14, 4:55 pm, "Peter Dohm" wrote:

I am really not dissagreeing with you--as the pressure system that I
am
thinking of would use a VW type cooling fan to augment the ram air
pressure.
That would be a rather obvious source of added weight and an easily
visible
use of power--and would never be popular.
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The trouble with the coaxial blower mods was the SAME as with the
turbo people, in that there simply was not enough fin area for the
increased density/flow to do much good. Everyone seemed determine to
get "60hp" sixty mythical horsepower from an engine that in its most
powerful configuration only produced 57bhp @ 4400rpm.... and you only
got to pull that for something less than 5 minutes.

So you increase the displacement to something seriously silly and
USING THE SAME HEADS & FIN AREA start pulling as much as 85hp(!!) from
that configuration... and wondering why things weren't working right.

Maximum SUSTAINABLE OUTPUT of the '1600' (displacement 1584cc) under
Standard Day conditions was something like 36bhp, whereas PEAK OUTPUT
can be just about anything you're willing to pay for. It doesn't blow
up (although it can) but it blows your bhp right into the porcelain
fixture.
SNIP
-R.S.Hoover

Hope you don't mind my jumping in here Bob. Do you remember the Porsche
engine with the cooling fan behind the prop? It was supposed to
eliminate the need for cowl flaps and also prevent shock cooling too.
What happened to it?

--
Anyolmouse