sweet pj powered plane

[Zippiot]

http://blog.modernmechanix.com/2006/04/ ... pulse-jet/

its tiny!!!!!!!!!

[Irvine.J]

One day I will make one of those thats awesome

[Zippiot]

Maybe turn this into an r/c plane, would be the worlds smallest r/c jet plane!!

[Mark]

"THIS model plane project uses what may be the smallest successful pulse-jet engine ever built. It was developed after scores of experiments and the building of a dozen test models by Hiram Sibley, Jr., a California guided-missile engineer."

Good stuff.
Mark

[Mike Everman]

that was a good find!

[Zippiot]

Someone is also selling those 5 pages on ebay...

[leo]

Here is a other picture from that site.
KDD1

[Al Belli]

Hi,

Go to the pulsejet section and under blueprints you will find ( #17 )craftplane.

The plans are for the pulsejet described by Mark, and are free for the downloading, so why pay for them on Ebay ???

Al Belli

[Zippiot]

Yeah most of what you need on the plane can be found on the page I linked...but I guess they are selling the full article

What kind of performance does this little guy give?

[dynajetjerry]

Hi, Guys,

I have a superb example of Sibley's Craftjet engine but I suspect the complete airplane might fly poorly, if at all. As designed, it is quite heavy (unneccessarily so, I believe,) and it's thrust is unlikely to exceed a few ounces. In fact, I'd be surprised if static thrust equals the weight of the engine plus fuel!

I have never run mine and the unstained tailpipe indicates no one has. As far as powering an RC model with this engine is concerned, that may be possible, considering how small and light batteries and receivers and actuators have become. To anyone who hopes to make and fly such an engine, I suggest he or she make every effort to reduce weight.

Jerry

[juki48]

I built the craftjet engine. it's an awesome little thing. http://www.pulse-jets.com/phpbb2/viewto ... t=craftjet
I've always wanted to test the thrust but never done it.

[Mark]

To me it's a strange experience, listening to a craft-sized jet run. The engine is really kicky and loud even for so small. I can recall listening to it backfire and machine gun when starting up using methanol, feedback is a marvelous thing. The reports/bangs kind of emulate Black Cat firecrackers going off.
http://www.dyberryfireworks.com/BlackCa ... ackers.jpg

[_Rahul_]

The design of the Aircraft seems very interesting. Looks like half of the aircraft is being used while the wings added to the Pulse-Jet's tail complete the plane. Not like other models which have the engines mounted on a plane, it looks like the engine is the plane itself!

I found it Interesting!

Merry Christmas!!

[dynajetjerry]

Rahul,
You're right about the jet pipe being used as the rear part of the fuselage. In this application, it probably works well. However, such an assembly presents problems when used with a less massive and/or larger pulsejet: At running heat, the pipe expands and changes the effective length of the elevator push rod. If the horn is on top, the elevator moves up as the pipe expands from the heat. If under the surface, the opposite reaction takes place. A few CL models were made by Joe Fallo for Bill Tenney at Aeromarine, in 1947, using a similar design. Control problems were rather severe and, also, the tailpipe was weakened as it heated up. The whole idea was abandoned after Jerry Nolin demonstrated the limitations of such designs but those models remained on display in Aeromarine's "hanger."
Jerry