From the cob-webs in my mind: the Dyna-Jet

Could the co2 engines have been made in Czeck Republic?
there is a guy who sells some masterpieces,
http://www.gasparin.cz/



that is another of his engines i think it is the second smallest.

nitroairplane wrote:Could the co2 engines have been made in Czeck Republic?
there is a guy who sells some masterpieces,
http://www.gasparin.cz/



that is another of his engines i think it is the second smallest.

I don't think it was listed as the CZ republic.

That one is way to big,,these engines in the article were,,,molecule size,,I guess is the best way to explain it. He used a set of tweezers to hold the 7 cylinder for a picture. You would think it was a speck of dirt or a tiny,tiny pebble if you looked at it quick.

My ex father in law handed me that magazine, I even contacted him seeing if he still had it. No luck.

PV Pilot wrote:

nitroairplane wrote:Could the co2 engines have been made in Czeck Republic?
there is a guy who sells some masterpieces,
http://www.gasparin.cz/



that is another of his engines i think it is the second smallest.

I don't think it was listed as the CZ republic.

That one is way to big,,these engines in the article were,,,molecule size,,I guess is the best way to explain it. He used a set of tweezers to hold the 7 cylinder for a picture. You would think it was a speck of dirt or a tiny,tiny pebble if you looked at it quick.

My ex father in law handed me that magazine, I even contacted him seeing if he still had it. No luck.

I'm sure that gasparin made some that size
look at this compilation.

And this,
http://www.reginaldluycx.be/collectie3.html
and this,
http://www.reginaldluycx.be/collectie.html

SuperDave wrote:Emerge visions of the Dyna-Jet. They were an actual model jet engine that was started using a manual tire pump to get the air flow going then the jet was fired off and the fun began.

Popular in the post-WWII era into the 60's, Dyna-Jets were all the rage in speed competition although ear-protection was a necessity for both the pilot and the spectators.

I've not read about or seen anything on the Dyna-Jet in many years. We used to call them "The Flying Blowtorch" as the were not only loud but emitted a flaming exhaust.

Comments welcome.

Never had any actual experience with them...though they did hold my fascination as a kid. Got an old magazine somewhere in my collection with a construction article on an R/C Phantom powered by one. When I was 13, I'd always skip to the end that described the flying characteristics and try to imagine what it must have been like. While I don't remember the exact words in this particular article, it was close to: "Model is fast...Pilot reactions must be quick!"



Think there may be Youtube videos of the C.L. events with them.

I remember them well... At CL contest, when one fired off, heads turned over the entire field... No question what was flying... Sometimes ending in flames....

I don't remember them as being particularly fast... But heavy... I think they used the speed circle that had a post in the middle to help the pilot stay in the middle.


A friend had one that had never been flown... We took an old Magician .35, cut off the top of the fuse straight from the canopy to the tail (rudder, we don't need no stinkin' rudder) and fabed up some sheet metal brackets to strap it above the top of the fuse with about a 1" gap to avoid flames in flight... Went down to the Fremont, CA GM plant and flew it in the paved rail yard where they loaded cars on a weekend morning... Way out in the middle of nowhere about a mile or more from any residential area... The cops were there just as our second flight started... I can still remember explaining to them, shouting at the top of my lungs, that no, there is no way to stop it until it runs out of fuel, which wasn't very long... They were pretty thirsty... By the end of the flight, the top of the fuse was charcoal anyway...

nitroairplane wrote:And this,
http://www.reginaldluycx.be/collectie3.html
and this,
http://www.reginaldluycx.be/collectie.html

All I can say is.... WOW!

I'd call everyone's attention to the Dyna-Jet's "cherry red hot" exhaust shown in the vids.

They were known to cause some pretty serious fires both in the air and on the ground. Of course, in those days, the hazards of asbestos were not known or appreciated.

Cz10 wrote:

nitroairplane wrote:And this,
http://www.reginaldluycx.be/collectie3.html
and this,
http://www.reginaldluycx.be/collectie.html

All I can say is.... WOW!

I know right he has an amazing collection it must be 2000 times bigger than mine.

From the A.M.A. Museum today...

Kim wrote:From the A.M.A. Museum today...

very nice model but i see it is not one for the under arm style launch.

The startup process was always an interesting exercise to watch and usually involved two or more people. You had a holder (both IC and jet speed planes were launched from a dolly), someone to fiddle with the mixture and buzz box, and someone to pump, although most brought air tanks with a probe later on. At sanctioned contests, someone was normally on the sidelines with a fire extinguisher. It was literally a three-ring circus since there was a time limit on starting. Lots of activity punctuated with short BRRRAAAAAAAPPPPPPPs. When it did start, the noise was unbelievable -- pilot took off running to the center, someone pulled the equipment out of the way and the holder just tried to keep from being grilled.

The post mentioned by Cz10 in the center of the circle was there for two reasons. It had a yoke that the flyer had to keep his forearm in. This ensured that he could not easily whip the plane or shorten the lines to increase the apparent speed. You were allowed to whip the plane to get it up to prop speed and on the pipe, but the timed run had to be done in the yoke.

I always like the IC speed events due to the RPMs turned by the engines being insane, but jet speed bordered on wicked with the noise and hot pipes.

andrew wrote:The startup process was always an interesting exercise to watch and usually involved two or more people. You had a holder (both IC and jet speed planes were launched from a dolly), someone to fiddle with the mixture and buzz box, and someone to pump, although most brought air tanks with a probe later on. At sanctioned contests, someone was normally on the sidelines with a fire extinguisher. It was literally a three-ring circus since there was a time limit on starting. Lots of activity punctuated with short BRRRAAAAAAAPPPPPPPs. When it did start, the noise was unbelievable -- pilot took off running to the center, someone pulled the equipment out of the way and the holder just tried to keep from being grilled.

The post mentioned by Cz10 in the center of the circle was there for two reasons. It had a yoke that the flyer had to keep his forearm in. This ensured that he could not easily whip the plane or shorten the lines to increase the apparent speed. You were allowed to whip the plane to get it up to prop speed and on the pipe, but the timed run had to be done in the yoke.

I always like the IC speed events due to the RPMs turned by the engines being insane, but jet speed bordered on wicked with the noise and hot pipes.

But i bet the jets dont sound as good as a Shuriken .061 at peak RPM.

Just yesterday my dad, brothers and I were flying a Dynajet powered R/C model. We go to an abandoned WWII training airbase in the middle of nowhere so the noise won't be objectionable. Noisy fun!

tubebass wrote:Just yesterday my dad, brothers and I were flying a Dynajet powered R/C model. We go to an abandoned WWII training airbase in the middle of nowhere so the noise won't be objectionable. Noisy fun!

High pitch noisy fun for the whole family

It's a Lanier Shrike. The yellow box behind the plane contains the ignition unit, and also serves as a stooge which holds onto the airplane till we're ready to release it. The plane is sitting on a dolly which stays on the ground when the model lifts off.

Yep... That's pretty much how we mounted it on the Magician.

We've got thin aluminum sheet under the engine to prevent the charcoal problem you mentioned. We've been flying this one for around 15 years now.

tubebass wrote:We've got thin aluminum sheet under the engine to prevent the charcoal problem you mentioned. We've been flying this one for around 15 years now.

What fuel?
Butane,propane ethane?

We're using a mixture of regular gasoline and Coleman fuel (naptha).

tubebass wrote:We're using a mixture of regular gasoline and Coleman fuel (naptha).

Cool I once made a pulsejet the old soup can thing.