"robert arndt" wrote in message
om...
http://www.texasmonthly.com/ranch/sr...1rocket.1.jpeg

A captures pulsejet on a stand. Notice that is operating by being fed
air, fuel, and notice the spark plug lead.
Again, notice how the pulsejet CANNOT operate INDEPENDENTLY without
flying at at least 186 mph.

Rob

This does not follow, just because the engine was being fed with air
that does not mean it must be.

The NACA articles describing the tests made it clear that
they used inlet air speeds of 0 mph to 340 mph

At 0 mph the engine DID run independently and produced
500lbs of thrust

The table of data reads as follows

Simulated Ram pressure in water 0 18 48 58
Equivalent indicated airspeed mph 0 190 280 340
Max thrust 500 660 740 770
Thrust for min fuel consumption 420 610 660 680

please take the time to read it

http://naca.larc.nasa.gov/reports/19...a-wr-e-269.pdf


Note especially the comment on page 12

"Figures 8 & 9 show that for a ram pressure of 0 (ie. ZERO ram effect)
from 6 to 9 pounds per second of air is induced into the engine for
combustion upon which an effective jet velocity of about 2300 ft per
second is developed"

They also describe how Argus needed an external spark and air
blast for starting but that immediately after start this was no longer
required.

What they did have to do was put a shroud around the engine to cool the
shell if they were to run it for 30 seconds at zero mph IAS

I dont doubt that the Germans imposed a limit of 7 seconds running on the
ramp before launch but it DID clearly run unaided at launch time

Keith