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Hey guys, I built most of this jetkart last summer but only had time recently to finish it off. A lot of the information on this site was very useful so thanks for that. I have a couple of questions. First, I am planning on building some thrust augmenters but I am not sure what dimensions to make th...

Thanks for the replies. I use 16 gauge mild in some of my larger chambers. When going very large in diameter I use a wooden post mandrel that is slightly smaller in diameter than the chamber. It must be relatively round on the portion you will be hammering against, and able to withstand repeated str...

Hi, I am also trying to build Simpson's 55lb thrust Lockwood, and have a similar question so I thought I would post here instead of making a new thread. I am using 16 gauge mild steel to construct it. I managed to make the smaller cones on either end of the combustion chamber, but I am finding it ve...