Jul 14, 2015 · Here is a bug I've just recently noticed in 23.09 and which isn't fixed in the beta. On a Mac, if dark mode is enabled, printing the design info places a dark background behind a portion of the graphic of the rocket in the generated PDF (as shown below using the included example model rocket file). View attachment 684543

Jan 10, 2025 · Balsa Machining Service 3" School Rocket - best value in MPR rocketry. Basic 29mm powered kit is $34 - fully optioned 5' rocket with payload bay and rail buttons is under $60. They also have a 24mm powered version but I'd go with the bigger motor - you can always adapt down. Top quality made in USA parts and a super flyer.

Aug 8, 2022 · FWIW: The best way, IMO, is to start with one of the Open Rocket Examples, save it to your directory with a new name, and then start modifying it. Measure the parts, weigh the parts and then input the data. You'll start building a database of rocket simulations made by @Frausing and can start using those as your baselines.

Nov 5, 2016 · The rocket began to tumble at booster engine cutoff (BECO). I think this is because the engine-driven gas dynamic stabilization was working until BECO and there is a slight time delay before the boosters eject. At BECO, the rocket tilted abut 30° but then flew straight under the power of the core motors. 6 out of 6 motors ignited in the 1st stage.

Dec 11, 2024 · Yesterday, Tim VanMilligan said he enjoys the rocket prep (referring to his $500+ Nike Hercules rocket). I'm still trying figure out if I enjoy the rocket prep or just easier to slap a JLCR on. @John Beans once mentioned that only takes 100ft for rocket to deploy and decelerate but I like 300ft for windy days and 500ft for HPR. The JL customer ...

Feb 15, 2025 · If you want to protect from Zippers, you use the Quest model rocket method of Kevlar cord and shock cord. You mount the Kevlar to the motor mount your favorite way. Mine is the Lariat loop around the aft of the motor tube.

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Feb 14, 2025 · So I took the 'stock' two-stage rocket in OpenRocket and tried a few different delays on the booster motor. See below, ignition at ejection charge to show delayed staging The motors above the H100/I357 are in the stock example sim, I'm ignoring those for now These are set to automatic, ignition at ejection charge Now switched to first burnout

Sep 29, 2024 · Run the rocket on the RASAero II software with the different airfoils and you can see the performance impact of airfoiling, or at least rounding, the airfoil on the fins. Note that the rounded airfoil was added to the RASAero II software not just for model rockets, but as others have mentioned, with very thin carbon fiber fins it can be very ...