(robert arndt) wrote in message . com...
Bruce Simpson wrote in message . ..
On 21 Jan 2004 08:53:05 -0800, (robert arndt) wrote:


I think you'll find that Paul Schmidt's valveless pulsejets (that were
superior to the valved Argus engies which he nevertheless assisted
Argus in designing) could resonate at zero velocity. I do recall
reading that a V1 engine required 26mph to opperate but I'm all open
on this. I imagine that the expulsion of hot gases out of the rear of
the Argus tube could by its own inertia continue moving and thereby
partialy void the combustion chambers and create sufficient vacuum to
draw in a fresh charge of air over the valves. Similar to the way
'extractor' exhausts work in cars. (I think the term is
Schwungaufladdung in German IC engine terminology)

Some of Schmidt's cruise missiles designes and engines had zero
frontal area for the intake. The intake was simply a 'cigar band'
mesh 2/3rds of the way along the missile. The resonating effect
drawing in air around the circumfrence. Very elegant.

Schmidts designes were more advanced, superior anbd actualy worked at
700kg thrust but I beleive they didn't get into the V1 because Schmidt
wanted to hang onto his patents which helped Argus advance faster into
production.

Bruce Simpson incidently has quite a lot of credibillity on these
matters as he was featured in Junkyard wars making pulsejet powered go
carts and featured in the news for his dersire to build a backyard
cruise missile.