Your results is really awesome!!!
I haven't think that we can create intense jet in case small diameter tube like this.
I'll　try small pipe as you did.

I think that we can get good improvement in all cases(1,2,A,B), however, I can't conclude which one is the best in practice. Just trying is the best way. IMAG1990.jpg IMG_1811.JPG In my case, I connected the　T-tube to gas-torch. By bending gas flow direction and impinge on the pipe wall, well fillin...

Hi, Futterama. I'm glad to hear your success! The result that the pipe without inner spirals got the loudest sounds was interesting for me because I only tested the pipes with diameter more than 30 mm, and every test, I got the louder sound in case with inner spirals. I think that in the tube with s...

Futterama Don’t mention it. Thanks to you, I got the motive to investigate about detonation. I'm now reading this paper. http://www.sciencedirect.com/science/article/pii/0010218089900655 This paper seems to have information about the general dimensional condition for detonation. I tell the contents ...

Sorry for my late reply.　I'm now investigating how to design the optimum configuration for detonation cannon. So, I tell you my current view briefly. Although I don't know about the existence of length/diameter ratio, there is minimum value of both length and diameter for realizing detonation. The m...

Thank you for your reply jackssmirkingrevenge. I often use schrader valve as a simple trigger. The below videos show the usage of schrader valve as a trigger of AEV which was mentioned above. Once the schrader relieve the pressure of pilot volume a little bit, the piston unit starts to move, and the...

Hi mobile chernobyl, thanks for the suggestion. I have been looking for information about detonation, but did not really come up with an answer to the first question that popped into my mind: Can it be done with an air/propane mix or does it need something more like oxygen/acetylene? I wrote the gu...

mobile chernobyl

Thanks for telling me the origin ! I understand it well.

Thank you for your reply Gippeto, ToasT and mobile chernobyl. I'm glad to know the name of "Toolie Valve". We have called the cannons with this kinds of toolie valve as "Single Cylinder type Exhaust Cannon(単管式エグゾーストキャノン(単 is Single, 管 is cylinder, and 式 is type))" in Japan. Because of its low diffic...

Thank you for your reply wyz2285. I'm grad to receive the first reply at this website. The concept of this Exhaust Cannon Mk.11 is to realize both semi-automatic firing and high speed valve opening for intense shock wave.The direction control valve is pretty good tool for realizing the semi-automati...

Nice to meet you everyone. I am a representative of 巴波重工|UZUMA HEAVY INDUSTRIES in Japan. Thank you for the finding and mentioning me. I have been watching this website, and so I'm very grad to see my creation here. As Mr.jackssmirkingrevenge mentioned, it is illegal to fire projectiles in japan. An...

Hi, all. I am a grad student of nuclear engineering in Japan. And I am an administrator of UZUMA HEAVY INDUSTRIES. http://www.uzmlab.com/_/rsrc/1445192544054/config/customLogo.gif?revision=4 http://www.uzmlab.com/ I'm very glad to see this mentions for my inventions at this web site. ITWOST, I stum...