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RE: Ram Jets and Pulse Jets
Posted by: Don Baker ()
Date: December 10, 2000 12:21AM

<HTML>Hi Kurt-
A little more information on ram jet and pulse jet engines -
True ram jet engines (and I don\'t mean pulse jets) have been operated at speeds as low as 200 mph. - supersonic speed is not an absolute requirement for true ram jet operation. However, at this low speed they are extremely inefficient and the operation is unreliable. Performance is greatly improved as the speed increases to supersonic velocities.

The pulse jet was a derivitive of the ram air idea designed to produce a simple reaction engine which would operate reliably at subsonic speeds. This it did by use of a set of mechanical vanes located at the air inlet. When the vanes were open, relatively low pressure ram air (there was no air compressor) was admitted to the combustion chamber, mixed with fuel and ignited. The resulting \"explosion\" caused the vanes to snap shut sealing off the air intake and the combustion gases to exit through the tailpipe thus producing a pulse of thrust. The vanes then re-opened, admitting another charge of air and the cycle was repeated. The V1 engine operated at about 40 pulses per second which caused the distinctive \"buzzing\" sound. A pulse jet can operate while stationary but becomes much more efficent and develops rated power as its velocity through the air increases and produces a \"ram air\" effect.
Regards,
Don B</HTML>

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Subject Written By Posted
Tesla, inventor of ASDIC Fin Bonset 12/08/2000 06:57PM
RE: Tesla, inventor of ASDIC Rainer Bruns 12/08/2000 09:24PM
RE: Tesla, inventor of ASDIC Don Baker 12/09/2000 05:04PM
RE: Tesla, inventor of ASDIC Fin Bonset 12/11/2000 12:44PM
RE: Tesla, inventor of ASDIC Roy Prince 12/08/2000 10:01PM
RE: Tesla, inventor of ASDIC Craig McLean 12/09/2000 01:36PM
RE: Tesla, inventor of ASDIC Leon C. Gall 12/10/2000 04:51PM
RE: Tesla, inventor of ASDIC Fin Bonset 12/11/2000 12:46PM
RE: Tesla, inventor of ASDIC Joe Brennan 12/09/2000 07:55AM
RE: V-1 propulsion kurt 12/09/2000 10:04PM
RE: Ram Jets and Pulse Jets Don Baker 12/10/2000 12:21AM
RE: Tesla, inventor of ASDIC Gudmundur Helgason 12/11/2000 09:20AM
RE: Tesla, inventor of ASDIC Fin Bonset 12/11/2000 12:50PM


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