Sunday, October 14, 2018

Holtville, October 6th, Launch Report

Last weekend's launch was the club's first since it's cooled a bit.  I had planned to attend this weekend's Lucerne launch, Octoberfest, but received notice it had been cancelled due to previous rains and pooling on the lakebed,  Oh well... back to last weekend.
     I had packed lightly, only bringing two well-flown rockets, but the launch still rocked.  First off was my trusty, unpainted 3" Madcow Nike Smoke on a AT H550 Super Thunder.  I'll reiterate that this is my new favorite, punchy propellant.  In the video notice that the rocket's gone in the upper-left corner before the rock debris even passes the camera:

I forgot which motors that Val and Bruce had flown.  Oops.  Finally I busted out a Pro29 CTI 138G106 Skidmark for my trusty, painted DarkStar Lite.  I was a bit surprised that very little titanium made itself available for inefficient yet spectacular external combustion.  I like sparks. NikeSmoke-H550SuperThunder DSL-G106-Skidmark

Monday, October 8, 2018

1 Mega Cowabunga, 2 months, 2 L motors

I'm behind.  I therefore deem it appropriate to place my April and July 2018 Lucerne flights in a single blog post.  'Cause that's how I roll.
     This Mega Cowabunga simply rules.  It's of a stubby aspect ratio but it's diameter is eight inches.  And is has a 98mm motor mount screaming for increasing thrust.  It's inaugural flight was on an AT L1500 Blue Thunder and I've continued with increasing thrust.  In April I flew it on an AT 4668L2500 Super Thunder.  In July I flew it on a CTI 4807L3150 Vmax.  The vessel takes that accelerative abuse like a champion (full-screen viewing remains recommended):

Both flights were very similar. Rapid ascent off the pad, ejection at apogee, gentle unfurling of the 'chute via deployment bag, and recovery less than one mile away on the lake bed.   Flight didjits:

AT L2500 Super Thunder
Max acceleration: 19.355 Gs
Max velocity: 765 ft/s
Max altitude: 5719 ft AGL
Raven 1: graph | tabular | motor trace
Raven 3: graph | tabular | motor trace

CTI L3150 Vmax
Max acceleration: 23.38 Gs
Max velocity: 871.5 ft/s
Max altitude: 6407 ft AGL
Raven 1: graph | tabular | motor trace
Raven 3: graph | tabular | motor trace

I think that Super Thunder has become my favorite punchy propellant of late due to its excessive flame length.  Unfortunately I failed to catch a photo of that in April but I seem to remember it being over 15 feet long.  I did, however, get a sweet sequence of the L3150 ascent and here's a peak shot:
MegaCowabunga-L3150_4GS19820
I've ordered an AT M4500 Super Thunder so you know what's next.