On 22 Jan 2004 20:46:44 -0800, (Eunometic)
wrote:

At one point it seemed that constant volume combustion would win out
over constant pressure combustion. Several projects were looked at by
the Germans as they seemed superior at both generating thrust and gas.
Some used conventional compresseors and systems of poppet valves and
spark plugs that needed to be elaborately sequenced. (this
comblicated things)

Work is still being done on the application of pulsed combustion to
gas-turbine engines -- but there are many problems that have not yet
been overcome.

In theory, a pulsed combustor can be more efficient than a
steady-state combustor.

--
you can contact me via http://aardvark.co.nz/contact/