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I like where this is going. Accurate dimensions and thrust measurements are key. I also think that Ed's Chinese would be an ideal uFlow exercise, if we can actually model it. I'd love to build a larger chinese engine and work toward some changes that would increase thrust. Chris Chris, I am already...

Problem with total engine volume : Some of them have megaphone, some don't, that would distort the results. I agree with Mike, CC is not always clearly defined, however we are just after some common benchmark that would have some defects, but roughly should work. I remember valved pulse jet competit...

We need to establish certain benchmarks to compare various engines. 1. Volume of combustion chamber in cubic centimeters or liters. ( volume of cylindrical shape w/o any cone portion ). Than thrust in kg or lbs per 1 liter of CC volume can be calculated. That should be very important figure, since i...

Hey, hey, hey, Don't get lost in all that chatter ! You have forgotten : The new oficial language of the forum is : AUSTRAAAAALIAN ( Thanks to Roscco and Christi ) She can also bend sheet metal into tube - I witnessed. Have some bii- on me, Cristi ! And I will continue to drive my yanktank. Edward

Fellow Friends, Back in Phoenix, still half deaf and smelling propane everywhere, and feelingl quite high on all that exitement. On the breaks between driving runs home I already jotted some new ideas regarding possible improvements of our engines. It was an awsome weekend ! Mike, thanks you for hos...

This info may help someone. Standard automotive plugs have M14x1.25 thread. It is nearly impossible to find such tap or nut / nipple. NAPA sells "Spark plug non-fouler", Item #730-2440 that has female and male thread as a small plug extender - Price $2.79 for two pack. Just cut off male threaded par...

Bruno, I don't think we have to concerned much with the intake air reaching combustion/discharge temp, since ambient air is lot, lot cooler and would take certain time to heat it up to the max treshold, also no compession is present at that part of the cycle. There is going to be always some drop, w...

Smokey's results are quite telling - this concept is worth of following. Besides that, valveless pulse jet is an open pipe and is therefore selfregulating for the intake charge . Won't fire until the CC is ready. Hot air may perhaps slow its frequency, but it could produce bigger bang, because of be...

Combustion engines do not like hot intake air, I assume pulse jets
have the same problem.

Does anybody have diferent opinion ?

Is there any rule for minimum temperature differential between intake and exhaust air ?

Mike Everman, Thank you kindly, yes, the rocket stays home. ( Originaly I thought that was going to be big flying extravaganza ) Now , I fully understand that it is on private property of the friend of yours. And I fully understand your concerns. Have no plans to dissapoint you. I will bring one chi...

Hi, Mike I just wonder if you closed the list of participants or you still have some opening for more.. Since I am in early development of my pulse jets expertise, posibility to ask questions and learn few more tricks is very appealing to me. Particulary when such thing is in the "neighborhood". I a...

Mark, I apologize for jumping in so fast, I just thought the meet was a public event ( first location was at the airport ) and no indication was given " On invitation only " . Found the group via these good seach engines - Google. I grew up in Czechoslovakia - in 50's and 60's the hotbed of pulse je...

OK, I am new to the forum and I am comming to the meet. Will bring 66 mm Chinese valveless and perhaps 7ft tall rocket to fire. Since I live in Arizona, no problem getting there ! Just a thought - our beloved and omnipresent "Fatherland Security Department" may come hard on on air travelers carrying...