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normal operating speed, typically about 65% to 80% of VNE (speed, never to exceed)

why?

in the back of the nose cone, i planned a concave section to act as a flame holder, but it might have to be deep recession to hold the flame? or anotehr option is introduce a annular type of combuster like a turbine, or like the Messerschmitt design posted on this site. something to hold the flame, ...

200 to 250. and for a glider that is huge. i considered faster speed, like up to 450, like a U2, but that is out of my realm.

do you think ram effect will even work that slow a speed?

i agree, and have considered doing a third scale of this? and make it from sheet steel for testing. i am concerned about ram pressure vs the dyamic pressure of the pulse cycle. at some point ( i am assuming over 200MPH) the ram would take over, but slower than that, will the pulse resonance be enoug...

the intake is the challenge, how to get resonance? i can't find any info on Foa's design anywhere. Googling had nothing except what has been posted here on Pulse-Jets.

very odd that you can find any info.

Tufty, I redesigned based on Pyro Joes info posted earlier in this section. as for annular inlet, i will look up and read what i can find. it could mean more changes before i build it. as for fuel, i was considering three injectors mounted right behind the stand offs that will support the cone secti...

OK, here is an update design. seems very long, but based on Pyro Joes info. the only tinkering i think i should have to deal with is the inlet.

anyone out there have any thoughts on it, i would appreciate any ideas or concerns. thanks.

well my motives for this experiment are to power a glider i am working on. I like the simplicity of the pulsejet, especially the VPJ, and the weight. after i fine tune the engine design, i'll post the schematic of the design i am working on for the glider. my start elevation here is 5100' so i am ho...

thanks. i was just re-reading Pyro Joes article and then looked at the Messerschmitt designs again. looks like i made sum presumptions based on asthetics and not on acoustics.' I'll change my design and repost later for critiquing again, hopefully i can up with a good enough design to experiment wit...

Thanks Metiz, for the info. I read Pyro Joes info, and will recalculate the CC and tailpipe accordingly. One thing i noticed about his article is the taper from CC to tail pipe, he specifies a 20 degree angle is about optimum, but if you look at Messerchmitts design, it appears less than 20 degrees....

I too have just come to understand the valveless potential. I like Foa's design. was there ever any info printed on it? after reading Bruno's pages on the valveless, and looking Messerschmitt's pulse-ram and looking at Foa's design, couldn't one surmise that Foa's could be used as a Pulse-Ram? I use...

I too have just come to understand the valveless potential. I like Foa's design. was there ever any info printed on it? after reading Bruno's pages on the valveless, and looking Messerschmitt's pulse-ram and looking at Foa's design, couldn't one surmise that Foa's could be used as a Pulse-Ram? i use...