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UT tooling


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  • 1 month later...
  • 1 month later...

Hi guys! I had machined 1LB BP rocket tooling using ''pdfbq'' link. 2cm ID, spindle lenght 14cm. I've tested it using hotter 75 15 10 granulated BP without nozzle, ignited at the top of the core but the rocket CATO. Is the spindle too long? or is the BP too hot?
For UT tooling is too expensive to buy for me.This is the reason I have investigated for dimension.

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Nozzleless motors are very hard to CATO so there might be something wrong elsewhere.
Your spindle specs don't look very unusual either, whats the diameter of the spindle?
Also, at what pressure did you press the motor and how large where your increments?

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HI all! I have another question for you! Reading AFN book I read some different contrasting things about rockets. On AFN II it is said that the nozzle is 1/4''(~ 1/3 I.D) with 5.5'' spindle lenght for 1 pound rocket. On AFN III it is said that the nozzle is 45-50%(~1/2 I.D) of tube for a generic rocket, which spindle lenght is 78% of motor. On website posted by sjeef1 it is said that nozzle is 1/3 I.D. Using http://www.flashnet.dk/rts/ the nozzle is 50% I.D.. So can someone tell me to make ''perfect'' rocket what is the best tooling design ? Using larger nozzle I should use hotter fuel right? or to reach highest height is better smaller nozzle with colder fuel or bigger nozzle with hotter fuel? Is reliable using(http://www.flashnet.dk/rts/) software? thanks to all. :) My tooling have this design:
I.D 2cm
spindle lenght 15,4 cm
spindle width 1cm

Edited by only connect
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