THEONE Posted June 11, 2011 Share Posted June 11, 2011 (edited) Boys i have made a sugar rocket with:6mm nozzle7cm core length (without the nozzle) and 3mm wideround 50gr of fuel and 24mm IDThe motor weights round 150grAnd i took from it round 800-850gr max thrust, it is good ? Edited June 11, 2011 by THEONE Link to comment Share on other sites More sharing options...
ZenBlaster Posted July 1, 2011 Share Posted July 1, 2011 well, you measured the thrust, so i'm assuming it worked, good job! Link to comment Share on other sites More sharing options...
THEONE Posted July 2, 2011 Author Share Posted July 2, 2011 (edited) well, you measured the thrust, so i'm assuming it worked, good job! What about thishttp://www.amateurpy...&attach_id=2129 and this aaaaaaaaaa.avi Edited July 2, 2011 by THEONE Link to comment Share on other sites More sharing options...
stixstudios Posted July 18, 2011 Share Posted July 18, 2011 Boys i have made a sugar rocket with:6mm nozzle7cm core length (without the nozzle) and 3mm wideround 50gr of fuel and 24mm IDThe motor weights round 150grAnd i took from it round 800-850gr max thrust, it is good ? Hi there, Without knowing the burn time it's hard to say how good/efficient your motor is. It looks like your internal bore is 3mm diam and the nozzle diam. 6mm?If so, it's probably a bit of a waste of fuel as you don't really get much thrust happening until the core gets to about the diam. of the nozzle. Good effort though, about 6g's max. What sugar fuel are you using - powdered, melted, recrystalized? Cheers, Steve. Link to comment Share on other sites More sharing options...
r1dermon Posted July 18, 2011 Share Posted July 18, 2011 Sugar can be almost twice the ISP of black powder. Its a much more powerful, and easier to obtain/cast fuel. Drawback is its not as pretty, and you don't get that nice sulfur smell. Google nakka rocketry...you will be able to build a working pvc sugar rocket motor based on his plans. Link to comment Share on other sites More sharing options...
THEONE Posted July 19, 2011 Author Share Posted July 19, 2011 (edited) Hi there, Without knowing the burn time it's hard to say how good/efficient your motor is. It looks like your internal bore is 3mm diam and the nozzle diam. 6mm?If so, it's probably a bit of a waste of fuel as you don't really get much thrust happening until the core gets to about the diam. of the nozzle. Good effort though, about 6g's max. What sugar fuel are you using - powdered, melted, recrystalized? Cheers, Steve. My nozzle was 5mm but why you must never make the core smaller than the nozzle ? Here my first successful PVC engine test ( without CATO ) a small problem with the end cap but next time i will fix it 1.avi Edited July 19, 2011 by THEONE Link to comment Share on other sites More sharing options...
THEONE Posted July 20, 2011 Author Share Posted July 20, 2011 Here a second attempt with he KN round 200, nozzle blow out, i dont know if it is because the overpressure or a building mistake of the engine... that do you think guys ? 2.avi Link to comment Share on other sites More sharing options...
THEONE Posted July 22, 2011 Author Share Posted July 22, 2011 (edited) Boys now i was trying to make some PVC rockets and i have notice that the core is not exactly straight and exactly at the middle... is this a serious problem ? maybe that is why i have many CATOes ? Edited July 22, 2011 by THEONE Link to comment Share on other sites More sharing options...
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