psymon Posted March 22, 2006 Share Posted March 22, 2006 Hiya, Can some of you guys tell me whats the most you managed to lift with a rocket engine?I can only manage a payload of about 10g with my rocket engines. I am not sure how to increase the weight. If I make the core longer or fuel more powerful I get a cato... So I can only even manage a couple of small stars or just finish off the engine with some star composition... Link to comment Share on other sites More sharing options...
Mumbles Posted March 22, 2006 Share Posted March 22, 2006 First of all, what composition, and size of rocket are you making? One cannont help if you don't provide this info. As far as weight, I have seen 6" shells going up before. Those are a few pounds. Link to comment Share on other sites More sharing options...
psymon Posted March 23, 2006 Author Share Posted March 23, 2006 Oh yes sorry, I should have added more info. Here we go...The composition I always use is 61Kno3 34c (any carbon usually but now willow) and 5s. The tubes I use are 22m diameter to a maximum length of 80mm. The Nozzle has a diameter of 5mm and core length is usually between 10mm and 20mm (any more than that and I get a cato).I tried to lift a payload weight of 30g recently and the engine took off to around 20 feet then did an arc and hit the deck. Link to comment Share on other sites More sharing options...
Pretty green flame Posted March 23, 2006 Share Posted March 23, 2006 Oh yes sorry, I should have added more info. Here we go...The composition I always use is 61Kno3 34c (any carbon usually but now willow) and 5s. The tubes I use are 22m diameter to a maximum length of 80mm. The Nozzle has a diameter of 5mm and core length is usually between 10mm and 20mm (any more than that and I get a cato).I tried to lift a payload weight of 30g recently and the engine took off to around 20 feet then did an arc and hit the deck. Sounds like you have an end burning type rocket there. Advice: Hotter fuel, standar 15:3:2 work excelent. Link to comment Share on other sites More sharing options...
Nightstalker Posted March 26, 2006 Share Posted March 26, 2006 How thick are the tubes that you are using? I have found that 1/4" thick tubes work fairly well for Black Powder based rocket propellants however anything less than 1/8" tubes will CATO with all but the weakest of propellant formulas. Link to comment Share on other sites More sharing options...
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