prior to first test
The stubby motor was a rather thick 15mm I.D. motor that was the first to fly!
when taped to a stick at least. it was the first to have a proper smooth conical divergent nozzle made of PVA/Putty with a rounded inlet and was fired 3 times, or was it 4? anyway its last outing was in a small PVC rocket, which it failed to lift more than a couple of cm. a crappy cork plug was used for a header, and its nozzle is fairly eroded and tired so it has been retired now, so leave it alone and
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after test, with cork plug and contents