Re: bmw-digest V9 #86 Turbines for power

[RangeR BoB <samurai@xxxxxxxxxxxx>]

Atomic batteries to power!

		Turbines to Speed!

			Roar!!!!!!!

				Bat Man!

	In a word, the losses as heat make a generator-wire-motor rig
unfavorable compared to a simple shaft, much more than the pumping loss
of a well designed piece of pipe.  Heck, P-47 Thunderbolts had the Turbo
wAAAY in the back of the plane (behind the wing) and lots of piping, and
they made power.  not all turbo layouts are efficiently designed, true,
but many are.

	The need for an intercooler comes as much from the heat of compression
of the air (at higher boost) as from the transferred heat in the turbo.

	Your solution, while elegant, requires some serious iron and copper to
make work, plus the caps.  All the weight and bulk would negate any
benefit that I see, but that is me.

	A well designed axial flow blower (there once was one in production,
but it disappeared immediately back in the 80s) takes maybe 5 HP to run
at max revs (in terms of pumping loss) and even if your belt breaks, it
will spin and let the engine breathe (they tested this on a 305 Camaro. 
Unhook the belt, drive around, car ran fine.  Hook up belt, lose 2
seconds off your 1/4 mile time)

	YMMV, if rash develops, discontinue use.
- --

RangeR 
  BoB
Hembrook

'89 BMW 750iL                   "Sputnik"         91k
'89 Suzuki Samurai 4x4          "Sammy"           94k
'88 Kawasaki ZX-10                                28k

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