Ky Michaelson recently visited Derek Deville and his Qu8k rocket. For those who do not know, this rocket won the 100kft Micro Prize back in 2011, where an amateur had to launch a rocket to >100,000 ft (30.48 km), recover it intact and document it all.
Qu8k achieved this, reaching 121,000 ft (36.88 km). Powered by an O18,000 custom solid rocket motor and at 8″ in diameter reached a max speed of 3200 ft/s (975 m/s).
Flown on a 100mm M impulse KNSB motor, the rocket will eventually fly on a 300mm motor with 300kg of propellant.
Video Caption: Our largest (in size) sugar rocket flown. Launch and recovery was perfect, the flight was to test the airframe, avionics, and recovery systems. Propellant was KNSB. While built for a small ‘R’-impulse motor, for this test an adapter was used for a small previously tested 100mm ‘M’-impulse KNSB motor. https://www.youtube.com/watch?v=JOwow…
Charlie does a great job in summing up the variables in a solid rocket motor and how they effect the design, you can find OpenMotor here to work along.
Video Caption: Hi Rocketeers! One of my Patreons requested a video that went more in depth on failures that can occur in simulating solid rocket motors. This video shows some of the ways a motor design can be found deficient in simulation before you build one.
Charlie Garcia walks us through the design of solid rocket motors in his new YouTube tutorial series.
Video Caption: Hi Rocketeers! In this series of videos I want to teach you how to mix your own professional grade solid rocket motor. Far safer and much more efficient than your typical rocket-candy motors, we’ll explore the intricacies of grain geometries, simulation software, graphite nozzles, and aluminum cases, all while providing links to reputable suppliers. In this episode we’re looking over the design of the grain geometry of our motor, and exploring how to use the simulation software OpenMotor.
Meteor is a free web-based application for the design of sugar-based solid rocket motors. Based on the ever-popular SRM excel spreadsheet from Richard Nakka the program allows you to easily tweak and optimise your sugar motor designs, while giving you outputs such as thrust, ISP, chamber pressure etc.
The program also features a nice little nozzle design tool that outputs exit diameter and convergent/divergent lengths based on input angles, this makes it very easy to put the motor into your preferred CAD program.
Click the above picture and try it for free today!
Video Caption: WARNING: I was told it’s loud so turn down the volume. Two state rocket more tests at the FAR site on January 5, 2019. First test was a 100 mm seven grain 7615 N-sec KNSB motor with a new lightweight forward bulkhead welded into the motor case with a new titanium nozzle machined by Sugar Shot to Space member Chris Coveny.
The motor failed when the bulkhead gave way resulting in the motor thrusting down into the concrete test stand foundation. That caused the nozzle to be forced up into the aluminum motor case that mushroomed as a result of the impact.
The nozzle was cut from the motor case and used a second time in a six grain 6,900 N-second previously launched flight motor with conventional bolted in bulkhead. This second successful test showed no erosion of the nozzle throat. The nozzle was also cool to the touch soon after firing, something not possible with a steel or graphite nozzle.
Sugar Shot 2 Space (SS2S) are working towards a space shot of an entirely sugar propellant fueled rocket.
Video Caption: Small scale 2-stage Sugar Shot flight for testing our avionics and recovery. Booster performed well and recovered with no damage. The second stage failed to ignite (problem was found and will be corrected. Second stage recovery also successful with no damage. 150 mm ‘O’ impulse motor was successfully launched last June.
75mm second stage was successfully flown several times both as a single stage and as the second stage on a 100 mm booster.