Jim joins us from China, where he lives and works. The N00b’s Cherokee D, a Retro-Repro by Semroc The N00b has used some of Jim’s files and images to figure out the decal placement and paint scheme measurements on a number of builds, like his recently-completed Semroc Bandit and Semroc Cherokee D. Spitfire is about as close as OR can get. Spitfire, by FlisKits, is one such example. While most of K’Tesh’s sims can be used for flight simulations, due to the limitations of OR, there is the occasional model sim which is mostly just for show. The intakes on this model were challenging. Check out this masterful sim of the Estes QCC Explorer. Some are quite challenging, because of features on the model that OR isn’t built to re-create. Jim has figured out how to trick OpenRocket to simulate accurate looking kits of all kinds. One of the simplifying principles of Barrowman equations are the assumption that all nose cones come to a sharp point.īut what if you want a simulation that looks like the actual kit? What if you’re trying to clone a historic, out of production model? Or you want a good reference for decal placement? ( Click here to see the N00b’s interview with James Barrowman at NARCON 2017). These were derived from the math used in sounding rockets, and were published as an R&D report at Naram X in 196X by James Barrowman. To find the center of pressure, model rocket simulators use what’s known as Barrowman equations, a system of mathematically locating the CP on a model rocket. Now, for a flight simulation, this may not matter much. Jim Parsons’ OpenRocket version of the Estes Der Red Max, with an accurately-shaped nose cone Usually nose cones are spherically blunted. All nose cones in OpenRocket (except for the elliptical ones) come to a sharp point, which isn’t the case in most model rockets. One big difference you’ll notice is the nose cone. If you make a sim of a kit, you might notice that it doesn’t look exactly like the kit you’re building. OpenRocket is a great tool – and it’s free. You can download it here, and play around with it if you’ve never tried it before. OpenRocket is free model rocket design and simulation software which runs on Java. In this episode, we talk with Jim Parsons, who was once described as “the Chuck Norris of OpenRocket.” The Omega booster and Cineroc, simulated in OpenRocket by our guest, Jim Parsons
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