Archie wrote:

Does anyone remeber the Latham?
A low profile, axial flow, flat belt driven unit, that
seemed to vanish after just a couple of years.

Chase Knight, who is still working for Crane,
once had twin turbos feeding a rootes blower in
his dragster. Theoretically the best of both worlds,
but after years of instrumentation and testing,
decided to call it quits.
With today's technological advances, it might
be worth another shot. I'll call and see what he is
up to.
Archie

Sort of off the topic in a way but...  Detroit Diesel built
something called their 92 series of engines using a
blower with a bypass valve for the turbo.
  At slow speeds the blower provided boost and
 low end performance as the turbo built boost it opened
 the bypass valve wider and wider allowing more boost.
Way to heavy for an aircraft I expect but it might be fun
in a street car.  Bryan in Princeton B.C.

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