insutama Posted February 15, 2015 Posted February 15, 2015 For a 1/4" bottle rocket what would be more effective nozzle less or nozzled I'm thinkin a nozzled rocket would be better for a small bottle rocket because it won't be lifting much of a payload maybe a gram max what do all you think
calebkessinger Posted February 15, 2015 Posted February 15, 2015 In the 5/16ths size both work fine with a variety of fuels.
insutama Posted February 16, 2015 Author Posted February 16, 2015 I'm trying to decide which one to buy what would be pros and cons of each
nater Posted February 16, 2015 Posted February 16, 2015 I am confused, one can make a nozzled or nozzleless rocket on the same core burning spindle. Did you mean core burner or end burner?
schroedinger Posted February 16, 2015 Posted February 16, 2015 Get the nozzled set. Bottle rockets even work fine with hot fuel and a nozzle.
insutama Posted February 16, 2015 Author Posted February 16, 2015 yes sorry core burner or end burner
dagabu Posted February 16, 2015 Posted February 16, 2015 End burners are just like they sound, they have a nozzle (usually clay) and the fuel grain burns from one end to the other, they are the design that ESTES rocket motors uses. They provide a longer thrust band at lower pressures and don't lift nearly as much weight. Core burners again are just what they sound like and just like a nozzleless rocket, the fuel burs mostly at the same time along the core and burn much faster creating thrust very quickly but for a very short duration. Core burners too can have a nozzle while a nozzleless will have the fuel pressed all the way to the end. For 1/4" SBR sets, the core is important, an end burner in this size is very tricky to get working properly.
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