About this blog
Priit's blog on building high power sugar rocket - physics, chemistry, electronics
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New design, new body, a bit advanced fuel. Turn up the volume!!!
slight issues with the start that I have to figure out - but could not be happier - almost everything worked. By gps, 1km distance was travelled. Next test - will improve launch platform and will use slightly smaller diameter stainless steel tube + integrate camera.
At friday got really bored at work, called it a day and went to the garage to prepare some fuel 1) Cooked another batch of RNX propellant (oh this is fun one) 2) Cooked finally a decent batch of kno3/sugar/Fe2O3 end burner fuel After trying out different ways of cooking kno3/sugar for more than year, I believe I have finally mastered cooking that propellant type (Im talking about at least +500g batches, small ones are easy). Got most of the moisture out, packed it really well without any bubb
Long time no seen. Had a birthday and had to spend time with guests and preparing the event, so unfotunately could not get to garage But, meanwhile I have done lot of research and finally did what everything said it's not possible - huge thrust endburner from kno3/sugar! Though it needs more work as video below demonstrates. But for now I'm dealing with TOO MUCH energy and too high temperature that burns through stainless steel casing. For that I made slight changes to the engine: 1) To g
Last 5 tests have completely failed. Massive explotions. So clearly there was something very wrong with my design and decided to investigate it a bit more. It always seemed to me, that well published 65/35 % of sugar and KNO3 is too aggressive and with too quick burning speed. And my tests have actually proved it now. Plus, I got extremely good information on how the grain actually burns and the place of ignition is highly important!!! Take a look to these two videos below. Both grains are
After going through the calculations and previous test simulations then something was bothering me. I could not get the pressure under control. So after studying more my data I found out that my pressure and thrust curves were inverted and this is wrong. After careful modelling this is the new data I am using for the new test: As you can see thrust and pressure are now much more better than in prev. test. This means slight changes in nozzle design and also propellant length and core diam
Hi I'm not native English speaker so please forgive me my grammatical and vocabular mistakes I've spent months on reading and studying rocketry and 3 months ago decided to give it a try. At first, it really seemed easy - take KNO3 and Sugar, mill it, pack it and fire. Well, the first attempt actually worked and my miniature rocket took off. But after that I failed to repeat it - and I could not understand whats wrong. Usually there was no thrust - lot of smoke but that was all. Then decide
