150mm Sugar Rocket CATO

Bugger sums this up!

Video Caption: 150 mm KNSU sucrose rocket motor launch. Motor failed at the bulkhead resulting in a CATO. Friends of Amateur Rocketry test facility, Mojave Desert.

Worlds Largest Sugar Rocket Motor – Test 2

Video Caption: This was the 2nd test firing of the 12 x 44″ KNSB static test fire motor for the Sugar Shot to Space project. The first firing was using two 12 x 20″ propellant grains each weighing 132 pounds for a total propellant weight of 264 pounds. This test was using three 12 X 13″ propellant grains, each containing 85 pounds of KNSB sugar propellant.

Worlds Largest Sugar Rocket Motor Test

12″ diameter (304.8mm), 2 Bates grains, 260lbs (117kg) of propellant!

Be interesting to know the thrust and chamber pressures achieved in this test, they seem to have figured out any grain cracking issues that could arise and over pressurize the motor, looking forward to seeing more tests of this size in the future!

Video Caption: 2 grains 12×20
260 pounds of propellant
Motor by Rick Maschek and Eric Beckner

Phoenix 3 Sugar Rocket Launch

Video Caption: A 4″ (100mm) ‘K’ impulse 2-grain sugar motor. The airframe was made from salvaged and scrounged materials from other rockets. The propellant was KNSB with a 1″ (25mm) core. Launched November 5, 2016 from the FAR site, Mojave Desert.

89mm Sugar Shot to Space rocket motor test at FAR

Video Cation: An 89mm ‘M’ impulse 4 grain KNSB sugar rocket motor test at the Friends of Amateur Rocketry facility in the Mojave Desert, California on September 3, 2016.

FAR Tests and Launches

Caption: Several rocket launches and static motor tests at the FAR site on Saturday, February 6, 2016.

Caption: Sorbitol fuel with AP, AN, and KN combination as the oxidizer.
First burn is an open air 98mm burn test at night.
Second is a single grain 98mm ‘J’-impulse static motor test.
AP and AN added to increase Isp of the sugar propellant.

 

Sugar rockets in Norway

I recently discovered a group in Norway, Foreningen Rakett-teknikk, building KNO3 rocket motors and rockets. The most recent video of a test, posted below, shows the groups work towards an L class size motor.

“This is the 7. test of the Havørn rocket engine and the first qualification test. We now believe the engine can reach our goal of 160-190 kg. thrust over a 3-4 second burn. The burn was nominal and met our requirements, outside chamber temperature reached 150 degrees celsius in nozzle end. Total impulse of 5000 Newton-sec means a full L class on this test. Next qualification test is with a better igniter and some fine tuning on the nozzle.”

The group have also been working on an offshore launch platform which can be floated out, then utilizing a counterweight system is able to be stood vertical, ready for launch operations.

“Vertical test in calm waters. The platform is a 200mm, 6 meters long sewer pipe and a 4 meters high aluminium tower. With a 162kg counterweight, we can have a 20kg rocket mounted.”

You can see more videos of their projects in action on YouTube or visit their website.