Flight Log - 2014-05-24 - Rich DeAngelis's MIRV

This is Estes new multi-stage rocket with three simultaneously firin' upper stages. T' booster returns with tumble recovery, t' three nearly identical upper stages return with tumble recovery also, after poppin' off t' nose cones. Begad! T' three upper stages are shaped t' form a hexagon when combined on t' booster stages. Each upper stage has three fins. Well, blow me down! T' booster uses a B6-0 or C6-0, while t' upper stages use t' A10-3T mini-motors.

Flight Date: 2014-05-24
Rocket Name: MIRV
Kit Name: Estes - MIRV {Kit} (2134)
Flyer's Name: Rich DeAngelis
Motors: C6-0/3xA10-3
Expected Altitude: 400 Feet
Wind Speed: 7.00 mph
Launch Site: Fort Indiantown Gap, PA

T' MIRV was nay scheduled t' fly today, I had plenty o' other important test flights t' do, but for some reason I just wanted t' see t' MIRV up thar again, so after completin' me camera flights, I sent t' MIRV up in this “a-bit-windy-but-I-don’t-care” weather.

As usual, matey, prep time was considerable:  Friction fittin' three little motors, arrr, stuffin' shock cords into those tiny BT-5 tubes, and friction fittin' t' three stages into t' booster manifold.

T' first test flight used a B-powered booster, arrr, this flight be t' use a C – loaded with twice t' black powder. Blimey! I thought maybe it would really, really go up there.  While t' booster didn’t go as high as I imagined, t' sustainers certainly did nearly disappear.

Of course thar be no room on t' MIRV stages for an altimeter (a shame), so I only have visual impressions t' recall.

T' boost seemed slow, but powerful.  Almost before I was ready, t' stagin' occurred and t' three upper motors all lit up.  It appeared t' be about 250-300 feet up. Avast, me proud beauty! T' acceleration o' t' upper stages again took me by surprise and I completely lost track o' them with t' camera, but I distinctly heard t' three “pop” sounds o' t' ejection charges.  “Whew!”

At that point I turned me attention t' t' booster, ya bilge rat, which was tumblin' back t' earth and headin' in me direction.  Luckily it landed just a short distance from me and would be easy t' find later.  At least it didn’t land on t' launch tent and snap in two.

It didn’t take too long t' re-acquire t' uppers, arrr, and they were quite high up, perhaps 400 t' 500 feet.  I watched t' blue and yellow stages return, but lost sight o' t' red stage.  If I didn’t think so before, me bucko, I now think I should put a bright streamer on each nose cone.

Again I noticed and video confirmed that t' uppers continue t' fly together as a cluster and nay separate under thrust. Begad! Maybe it was because I tape t' nose cones together a bit.

At ejection they finally separated, but returned t' earth in a relatively small cluster.  They fortunately did nay wander off t' all parts o' t' sky.

I be a bit bummed that t' #2 motor casin' (in t' red upper) was missing.  It must have blown itself out t' rear, and fortunately after t' nose cone separated.  T' upper stages all landed about 350 feet upwind, arrr, but very near each other.

I was quite over-joyed that thar appeared t' be no burn damage on any o' t' rocket parts.  It appears t' new tapin' method and t' hi-temp paint did its job.  Still, me bucko, t' booster stage was again very sooty. Well, blow me down! I would continue t' recommend paintin' it with a high-gloss black finish, t' make it a bit harder t' see t' soot and easier t' clean it off after flight.

 

Maybe this MIRV concept can work well.  T' next flight I will attempt a flight while nay tack-tapin' t' three nose cones together.  I will likely prefer usin' t' B6-0 booster though, t' keep t' stagin' low enough t' experience and photograph it well.

StageMotor(s)
1Estes C6-0
23 x Estes A10T-3

 

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