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Sugar/Potassium Nitrate rockets



 
 
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  #1  
Old July 6th 06, 06:19 PM posted to sci.space.tech
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Default Sugar/Potassium Nitrate rockets

I read that the Kassam rockets are fueled by a combination of sugar and
fertilizer.

Anyone know how good a fuel it is? ISP numbers?

How does it compare to other solid fuels?

Have amateur rocket builders used this fuel in the past?

Seems like a cheap way to make a solid rocket.

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  #2  
Old July 11th 06, 01:18 PM posted to sci.space.tech
delt0r
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Default Sugar/Potassium Nitrate rockets

Google is your friend. I have used this and other amatures (not this
group) have too. It can be inconsitant and its ISP downright stinks.
But its fun and cheap providing you learn your chemistry and safty
*first*.

delt0r
wrote:
I read that the Kassam rockets are fueled by a combination of sugar and
fertilizer.

Anyone know how good a fuel it is? ISP numbers?

How does it compare to other solid fuels?

Have amateur rocket builders used this fuel in the past?

Seems like a cheap way to make a solid rocket.


  #3  
Old July 14th 06, 02:52 PM posted to sci.space.tech
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Posts: 3
Default Sugar/Potassium Nitrate rockets

I think the rocket is a bit more complex than that, as i have built
Sugar rockets and i am pretty sure we were never going to be able to
launch any type of heavy payload like that anywhere near the range that
the kassam rockets have. but i did see something about them using
fertilizer, sugar diesel fuel and something else. i will ask some arab
firends of mine there probably is a arabic website with instructions on
how to make them.

Peace
Zonker

http://2000ah.blogspot.com


wrote:
I read that the Kassam rockets are fueled by a combination of sugar and
fertilizer.

Anyone know how good a fuel it is? ISP numbers?

How does it compare to other solid fuels?

Have amateur rocket builders used this fuel in the past?

Seems like a cheap way to make a solid rocket.


  #7  
Old July 18th 06, 10:30 AM posted to sci.space.tech
John[_4_]
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Posts: 3
Default Sugar/Potassium Nitrate rockets

When I was a kid in the early 70's I had a paperback book that was
called "A guide to amateur rocketry" that had plans for rockets that
used a "carmel candy" propellent based on sugar/Potassium Nitrate. You
would melt it in an oven and pour the mix into the rocket casing. The
rockets were about 4' long and describes as capable of reaching
15-20,000 ft. I think the book was written by an army captain. The
other fuel it described was a zinc/sulfur mix. I don't remember any
ISP numbers after all this time. I haven't seen the book in at least
20 years, saw it listed on bookfinder for $48

John Hartley
www.hotmoon.org

wrote:
I read that the Kassam rockets are fueled by a combination of sugar and
fertilizer.

Anyone know how good a fuel it is? ISP numbers?

How does it compare to other solid fuels?

Have amateur rocket builders used this fuel in the past?

Seems like a cheap way to make a solid rocket.


  #8  
Old July 26th 06, 09:41 AM posted to sci.space.tech
Jim Logajan
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Posts: 27
Default Sugar/Potassium Nitrate rockets

"John" wrote:
When I was a kid in the early 70's I had a paperback book that was
called "A guide to amateur rocketry" that had plans for rockets that
used a "carmel candy" propellent based on sugar/Potassium Nitrate. You
would melt it in an oven and pour the mix into the rocket casing. The
rockets were about 4' long and describes as capable of reaching
15-20,000 ft. I think the book was written by an army captain. The
other fuel it described was a zinc/sulfur mix. I don't remember any
ISP numbers after all this time. I haven't seen the book in at least
20 years, saw it listed on bookfinder for $48


The book you are thinking of is probably "Rocket Manual for Amateurs" by
Capt. Bertrand R. Brinley; (C) 1960. (No ISBN number.) I read that book
back in the early 70's too. The copy I read went missing sometime in the
last few decades, so a year ago I managed to buy a used copy online via one
of the used book sellers who sell through Amazon.com.

Brinley did not give any ISP numbers for the "caramel candy" propellant but
did specify a theoretical ISP of 46 sec for zinc/sulfur at a chamber
pressure of 1000 PSI. However, that was after a correction factor of 50% -
the uncorrected ISP would have been 92 sec. (The stated reason for the
correction factor was because one of the exhaust products, zinc sulfide,
has a heat sublimation at the flame temperature, so that it would not
expand to produce thrust. But Brinley pointed out that at that time it
wasn't clear to what extent that happened, if at all.)
  #9  
Old May 24th 08, 09:39 PM
0523jk 0523jk is offline
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