Aspirespace Rocket Engineering Society
Experiments by Arif and the gang at Stanford University in the USA showed that hybrid fuel grains made from specific blends of candle-
Aspirespace have joined the growing band of rocketeers trying to emulate Stanford's successes.
Firstly we contacted rocketeer and candlemaker Stuart Liddell for advice on moulding the fuel grains: after some experimentation, we discovered that the use of a porous cardboard liner allowed the wax to flow into the cardboard. This anchored the wax to the card, and prevented it shrinking radially as it cooled.
We discovered that using a highly heat-
We then modified our H0 engine to use wax grains. Unfortunately, the results of our firings were less than encouraging. The majority of them just caused unburnt melted wax to spew out of the nozzle like water from a firehose!
We had more success when we anchored the wax inside plastic sponge material: pure wax needs mechanical support when it gets hot and soggy.
Aspirespace would like to thank our old friends at Airborne Engineering for their test-
And not forgetting Lucy the dog!
Still, we were getting nowhere until our talented new member Lucas independently came up with the logical modern alternative: encase the wax within a 3D-
Not only does this allow the fast production of grains with any desired porosity, but he’s not restricted himself to boring old straight cylindrical ports.
Our excellent team of engineers manufactured a rugged new test-
Good quality data was obtained even on the first two ‘shakedown’ firings, showing that the regression rate of these new fuel grains is simply enormous compared to pure plastic with a traditional port geometry.
More firings to come shortly! Here are pics of the first two tests:
|What is a hybrid
|H0 Gox/perspex engine
|H2 NO2/HDPE engine
|H20 LOX/HDPE engine
|What is a waverider
|The Caret wing
|Mk 10B waverider