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pulsejets for RC models

 
 
Reply Sat 24 Sep, 2011 08:06 pm
Much simpler and apparently much cheaper than any sort of a more normal radial compressor jet engine for hobbyists, pulsejets are almost similar to 2-stroke engines in their use of valves:

http://www.youtube.com/watch?v=p8FSa5peEUk&feature=relmfu

http://www.pulsejetbook.com/
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Type: Discussion • Score: 1 • Views: 1,070 • Replies: 5
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gungasnake
 
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Reply Sat 24 Sep, 2011 08:25 pm
http://www.youtube.com/watch?v=jEnNMTMZadw&feature=related
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raprap
 
  1  
Reply Sat 24 Sep, 2011 09:32 pm
@gungasnake,
Worked for V-1----loud as hell that's why they were called buzz bombs.

Simple to figure out--fuel is squirted in, the flapper valve slams shut--the kinetic energy is converted to head (pressure),ignite it, and open the flapper valve for thrust.

No whirling compressors, fans, turbines--you just need to get it moving to get it started.

Rap
roger
 
  1  
Reply Sat 24 Sep, 2011 10:56 pm
@raprap,
I heard one somewhere around 1960. Yeah, it was loud.
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gungasnake
 
  1  
Reply Sun 25 Sep, 2011 02:13 am
@raprap,
The guy explains it; the vacuum created by one exploding charge blowing out the tube sucks the next charge into the front chamber and then the valves shut again. Very much like reed valves into the lower chamber of an old 2-stroke engine. If it isn't loud something's wrong.
roger
 
  1  
Reply Sun 25 Sep, 2011 02:36 am
@gungasnake,
Un huh. The one I saw demonstrated needed to be started with a bicycle pump as I recall.
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