outkast Posted July 13, 2012 Share Posted July 13, 2012 as box of frogs [youtubevideo] [/youtubevideo] Quote Link to comment Share on other sites More sharing options...
enzo200500 Posted July 13, 2012 Share Posted July 13, 2012 Don't get me started on Pulsejet technology!! Either Lockwood/ Hillier or reed valve (doodlebug) !! Get a local fly-in arranged and I'll bring some along..... They'll rock yer world. And seriously piss off anyone within 1/2 mile radius... Quote Link to comment Share on other sites More sharing options...
enzo200500 Posted July 13, 2012 Share Posted July 13, 2012 Afterburners with pulsejets, proper night time entertainment... Quote Link to comment Share on other sites More sharing options...
Fly_mow Posted July 13, 2012 Share Posted July 13, 2012 I had a go at making a pulse jet!!! It was a 4lb thrust design about 2 ft long. Started it down my dads drive way and wow it was loud!!! Set of car alarms and dogs all over the shop! A lot of intricate details to them even tho they are a very basic design and theory. Never got mine to run with out forced air on the intake but loads of fun either way. Shame they are to heavy and to hot to hang on your back!! Quote Link to comment Share on other sites More sharing options...
enzo200500 Posted July 14, 2012 Share Posted July 14, 2012 Proper leafblower!! Lovely shot through the reed block, showing combustion process. [youtubevideo] [/youtubevideo]And side on... [youtubevideo] [/youtubevideo]Although easier to build, the reed material is the limiting factor to running duration. Not a problem when its all going to go pop! Commonest material is spring steel, but this tends to break down/melt at the edges, resulting in a loss of sealing ability. Its classed as a consumable item. Quote Link to comment Share on other sites More sharing options...
t_andrews Posted July 14, 2012 Share Posted July 14, 2012 Even water cooling doesn't extended valve life. Probably cook some corn pretty quick though... [youtubevideo] [/youtubevideo] Quote Link to comment Share on other sites More sharing options...
enzo200500 Posted July 14, 2012 Share Posted July 14, 2012 Thats a valveless pulsejet. Eric Beck does some brilliant work with these... Quote Link to comment Share on other sites More sharing options...
ptwizz Posted July 16, 2012 Share Posted July 16, 2012 I also built a pulse jet, when I was younger and more stupid. With the benefit of hindsight, Sifbronze #1 brazing was probably not the best construction method. Started it inside the place I was working, in a vice on the bench, fuelled with acetylene and started with the airline. It ran for as long as it took me to pull the fuel pipe off. My ears (and my assistants) were ringing for days afterwards. A brief but informative exercise; not one I would repeat. Pete. Quote Link to comment Share on other sites More sharing options...
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