This section will document my attempt to resurrect the Aerotech RMS Hybrid and launch it at Balls possibly in 2023. More to come.
NEXT STOP: BALLS
This will be last update before Balls. Fortunately, RCS came through and deliverd my much delayed order from April. The backup plan was to cannibalize a 38mm Blue Thunder propellant reload for the preheater grain. Thankfully, I received a delivery last week that included everything I ordered except for the 98mm casting tubes. These are…
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GRAPHITE NOZZLE
AKA: Shipping Delays Cause Minor Design Change The single-use design of Aerotech nozzles may be cost-effective to include in a kit, but when ordering from RCS, the availability of a particular nozzle needed for the motor case may not be available due to shortages or other delays related to their business. Going with the original…
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FUEL GRAIN PART II
After gaining experience with the 54mm ABS grain shell, I decided to do the 98mm. Using a printed shell allows you to select the right amount of infill based on your fuel viscosity. You will need to account for the high shrinkage of paraffin, approximately 17%, so once it cools a little bit, top off…
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FUEL GRAIN
After a lengthy search, an easily obtainable and inexpensive fuel grain material that requires minimal processing has been found. Since using sorbitol in the previous series of experiments, I wanted to find a material that was cheap and easy to use; paper mache and high-melting-point paraffin fit the bill; large quantities can be had for…
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