www.pulse-jets.com

virtually all of the hybrids on the market except HyperTech use this method.

West Coast Hybrids sells complete motors...

Buy from them, I know the guys. I am even working on some software for their test stand.

Very nice burn Ray; A Q sized engine! Are they planning on lunching a VW BUG? Well, they could. I haven't seen the rocket they plan to put the motor in, but it promises to be just as impressive as the motor, which by the way is 8" diameter, about 8 ft long. 158 lbs of propellant. I'm guessing at a ...

That's flattering about the boosted dart thing...the motor with a bit larger core will be somewhat progressive. Shorten the grain a bit (like 4" instead of 5") and the curve will be "flat". I can't wait to see the "Q" fly...should be more than impressive...even if the flight is less than optimal... ...

Yep, those are the guys...thanks for the reminder.

The hardware isn't that much different between a hybrid and a solid motor. Aluminum casings with snap rings grooves. The hybrid motor is longer, and has a bulkhead in the middle. Other than the bulkhead, all the parts are the same... Aerocon sells paper grains...any hot rod shop will have nitrous ox...

I've seen some of these...The guys from West Coast Hybrids have done it...pretty cool.

This time we tested a 6 grain 75mm motor. The same formula as the last stuff we have done before. Data Graph is attached, thrust is on the left, in Newtons, pressure on the right in PSI. Just a couple of observations from the data. Big spike in pressure and thrust in the middle of the burn. I am spe...

what is the thickness of the nitrous part of the motor? I guess what are the thicknesses of the nitrous tube for the specific OD of it? I believe the tubing is the same as a composite (solid) motor. The pressures are much the same, somewhat lower. They just make the tubing longer. From the other po...

I think you'll find that Nitrous Oxide/solid fuel will be easier to construct. You can use almost anything for fuel. PVC, Nylon, Paper, HTPB rubber, Wax, and even sausage...hehe Much safer to work with, not too much risk of detonation if you size the injector corectly. Of course, I prefer solids mys...

I see some difficulties with using gaseous Oxegen and gaseous Hydrogen. It'll be hard to get enough gas to make a useful motor. Motors work by sending high velocity gases out the nozzle. They rely on mass flow to work. If you pressurize the O2 and H to high pressures, you can get a good amount of ma...

Check out this site. They have instructions on how to build a Hybrid motor of their construction...It should give you a good picture of the way a hybrid motor works. The system they use is very common in the hybrid world. They call it a U/C valve...can't remember what the letters stand for...I know ...

Seamless tubing. The seam in the other stuff will prevent you from getting the liner in. Of note, the 2" schedule 80 pipe is frequently the wrong size for the liners...the best way to get it is to take some liner down, find some that fits and buy that...of course, you'll have to buy it from a local ...

Pretty much...but each casing is unique in its wall thickness. 29mm - 0.058 38mm - 0.083 54mm - 0.095 75mm - 0.115 98mm - 0.188 29 mm is 1.125" x 0.058 wall tubing, 38mm is 1.5" x 0.083 wall tubing. 54mm starts life as Schedule 80 aluminum pipe. 75mm starts life as 3" x 0.125 wall tubing, 98 mm star...

Its expensive to have one nozzle made...if you make 100 it'll start to get cheaper... You can buy nozzles that are already made, but the throat isn't drilled from a lot of sources. Loki Research Missile Works carries Purple Woody hardware, but you'll have to call them. Aerocon Systems Binder Design ...

depends on the wood glue. I would just leave the inner wrap of the paper free of glue. It'll bond well to the melted sugar propellant without the glue. The paper will absorb some of the propellant bonding it nicely to the tubing. James Yawn has a great technique . Use wood glue instead of the spray ...