On Sat, 13 Oct 2007 00:17:41 -0700, Eunometic
wrote:

Improving the supercharger efficiency of the Allison would have been
the feasable alternative, as the better supercharger largely explained
the contemporary single-stage Merlin's advantage over the Allison.

It totally explained it. The basic Allison block was superior and
smaller.

And yet this was never translated into overcoming the Allison's
performance inferiority on operational service.

The solution Allison came up with was turbo compounding; far superior
to
either supercharging on its own or turbo-supercharging.

AFAIK the only serviceable variant of the V-1710-F featuring anything
other than mechanical supercharging used mechanical supercharging plus
turbocharging, and even then wasn't available until mid-1942 and even
then was not as reliable as mechanical supercharging alone. This
wasn't a lot of use in 1940-42, and was of limited utility in 1943.

Gavin Bailey


--
Solution elegant. Yes. Minor problem, use 25000 CPU cycle for 1
instruction, this why all need overclock Pentium. Dumbass.
- Bart Kwan En