home made mini-rockets

Uodygin · Post by **Uodygin** » Wed Oct 13, 2004 7:37 pm

I'm new on this forum. I dont know English well-so forgiwe me that :)
[mistakes&grammar]
I come from Poland...
I would like to showe you my mini-rockets made with:KNO3, sugar, paper,
line, stick/wooden-"for shish kebab's" , fuse ("home made" or boughted fuse 2mm visco green fuse)

fuel is KNO3+sugar 65/35 [%-by weight] i mixing KNO3 with sugar, than
i am adding little bit of wather, place it in the pot, and that i'm heating
it to brownish colour.. in my country it is called "karmelek" :)
than I spill it on metal scheet... when it is a litle bit coller i'm forming
a cylinder (in my hands), than i cut that cylinder with knife to 2-3 cm pieces,
next I puncture ewery pieces of fuel with thin (spike) wire/or piece of wood/.
spike have to go through entire piece.
than I/m cooling them in fridge, and getting out spikes.
Than you have to cut a piece of paper (I use fiscal paper) and roll around
your fuel, next you have to cut a piece of fuce (1-2cm) and put it in hole
(from spike) in fuel block. now You have to bandage thight the paper near the fuse
, and the same do with it on other side. dont cut loping pieces of line-you can use
it to fix this little engine to a stisc[for shish kebab's].
you can also put 2 fuser on 2 sides of engine-than you can made a little firewark's, by putting on the other side
some pirotechnic's mixture (flash, etc.)

I would like to schove you some pictures and movies [ mine off course- in poland
i use pseudonim Łodygin or Uodygin) I put this description on my friends web-page
(in polish). more pictures and movies You can see [if you want :) ] on this page !!!
-preparation of fuel, making rocket, and fireing them :)

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http://chemik.vitnet.pl/articles.php?id=80 !!!
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now some(rest on web-page) pictures an movies:
I made even a movie -showing how to make this little engines ! [it is also on the web-page]
pictures:

paul skinner · Post by **paul skinner** » Wed Oct 13, 2004 9:53 pm

Thanks Uodygin.

Interesting articles. There's a guy here in Canada that has this as a serious hobby.

http://www.nakka-rocketry.net/index.html

Richard Nakka. Brilliant experimental engineer.

Welcome to the forum and don't worry about your English.

:-)

Paul.

mk · Post by mk » Thu Oct 14, 2004 3:44 pm

Simple and working - like it, especially the kitchen-photos!!

Are you also interessted in/ have you already built pulsejets?

Uodygin · Post by **Uodygin** » Thu Oct 14, 2004 4:53 pm

yes I'm ending lockwood-hiller pulse jet - wery small (the smallest i ewer made) lenght~30cm i will be engine for a RC car.
for the moment I can shove You pictures of my engine when i started to built it (i don hawe fresh photos)
-burning chamber

--

and on the right is the car :) have one servo-motor. today I end building my RC-aparature. [i heve a rc-aparature -boughted, but I like to do everything by myself :) ]
----
but what is "strange" :) i newer heard about "jam-jar"... i first read about it on this forum~when i was searching informations about vaveless-pulsjet's... I bouild that "toy" imidietley=it's simple & cool :)

mk · Post by mk » Thu Oct 14, 2004 5:54 pm

Have you already finished your sweet little Lockwood type engine and perhaps tried to get it pulsating?
At least the small chamber looks awesome...but I doubt it'll deliver more than noise...

RC-cars are in special ways part of my interest, too.
I tuned the 3.5ccm two-stroke "Force Engine" of my RC-car...the results: spinning wheels on gravel when throttling from ~1/2 to max. (1/2 throttle speed might be about 30 to 35km/h) and a frightening(!) sound...loooovely.

Uodygin wrote:but what is "strange" :) i newer heard about "jam-jar"... i first read about it on this forum~when i was searching informations about vaveless-pulsjet's... I bouild that "toy" imidietley=it's simple & cool :)

YES, of course!! Especially for demonstrating or rather explaining pulsating combustion to other people. They're always nice presents for (some) friends, like university students...
I built a bigger improved pot out of metal with propane lipfeed (hope it wasn't too much already...), too. It sounds more agressive then a glass jar, also when running on ethanol.

Uodygin · Post by **Uodygin** » Thu Oct 14, 2004 6:18 pm

It's not ended in 100%, but working! im only worying his current, i did not test for "power" - "machine" whith helps tests the current [in Kg or newtons] something like a "spring balance"... I'm not sure how much "power" I obtain. The fuel will be propane-butane. i test it with propane-butane -its good and easy to use fuel...

mk · Post by mk » Fri Oct 15, 2004 2:44 pm

Uodygin wrote:It's not ended in 100%, but working! im only worying his current, i did not test for "power" - "machine" whith helps tests the current [in Kg or newtons] something like a "spring balance"... I'm not sure how much "power" I obtain. The fuel will be propane-butane. i test it with propane-butane -its good and easy to use fuel...

You mean "thrust" I think (a funktion of mass flow per unit time and output gas velocity).

Is the engine working on forced air? Or what do you mean with "working" (I understood "working"="running self-sustained/ on its own"), because it isn't finished completely as you wrote?

What are the dimensions of this sweet little engine?
My 50mm (combustion chamber inner diameter - "CC ID") produces 1.5...1.7kg after a theoretical analysis of Milisavljevic. I'm still up to test it in reality.

Uodygin · Post by **Uodygin** » Fri Oct 15, 2004 6:27 pm

working"="running self-sustained/ on its own

yes its running on its own :) i isnt 100% ended-the parts isnt combined on indwelling. i didnt run it to long yet because I was afraid it to com apart :) .

mk · Post by mk » Sat Oct 16, 2004 3:16 pm

Uodygin wrote:yes its running on its own :) i isnt 100% ended-the parts isnt combined on indwelling. i didnt run it to long yet because I was afraid it to com apart :) .

Congratulations!!

What fuel do you use?
Could you post the dimensions of this engine to the forum (valveless recommened) or to me via email?

www.pulse-jets.com

home made mini-rockets

home made mini-rockets

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