Fat Fat Boy (2)
||18" nylon parasheet
||First flight after replacement of the shock cord (pulled off its mount
on the last flight, 2 August 1999). Also my first D motor flight
in far too long -- over six months! Everything was nominal, except
that I had a D with a weak ejection; the wadding and parachute stayed in
the tube until the drag of the tumbling nose cone pulled the parachute
out. No damage, other than to my nerves.
24" crepe streamer
||I'd noted that the weather was perfect for sending the Flutter-B really,
really high, so I stuck a C in it and let 'er rip. As I expected,
the rocket was completely invisible against the overcast before the smoke
trail got thicker just before ejection, but I was then able to track it
pretty readily on the streamer. I estimate this flight went about
1200 feet, and took close to a minute to come down.
18" crepe streamer
||This old reliable flew as well as ever; high and straight on this small
motor. Ejection was right at turnover and recovery was completely
nominal. Ho hum. B)
Fat Fat Boy (2)
18" nylon parasheet
Estes D12-7 core, 2x Quest C6-5 outboards
||This cluster layout, with the motors in a row instead of packed as
tightly as possible, is prone to loop from the thrust imbalance if one
outboard ignites late. Because of that, I called this a heads up
flight, and everyone was standing ready to dodge if needed -- but there
was no need; all three motors lit instantly and the boost was hot, straight,
and normal. Ejection was just after apogee, and though I expected
the motors in the plugged outboard mounts to eject, in fact they stayed
in -- which didn't do the bulkhead foward of the motor mounts any good.
There was also some additional burn damage to the unused mounts and to
one fin tab. I don't think this was due to blast reflecting up from
the deflector, since I had propped the rocket about six inches up from
an angled deflector; instead, I think the swirl of base turbulence drew
flame into this area just at burnout, allowing the damage to take place
during coast. Clearly, in future cluster mounts I need to make provision
to protect the mount tubes from this effect.
12" plastic parasheet w/ spill and vents
||With a fresh shock cord, the Alpha was ready to fly again, and I couldn't
immediately spot my A8-5 motors, so I put a B4-6 (one of my last of these
discontinued motors) in the Alpha, knowing it would go high and fast, but
pretty confident that the calm weather would allow recovery on the field.
Yep, all worked as expected, and the Alpha reached what I once thought
of as my jinx level for flights -- the first year I was back in the hobby,
I couldn't seem to keep a rocket past 20 flights.