Descon 6 Meanie x2 Upscale

Scratch - Meanie x2 {Scratch}

Contributed by Nick Esselman

Manufacturer: Scratch

PicBACKGROUND:

I have never made it a secret that I love t' looks o' Nordic Rocketry's Meanie. Ahoy! Blimey! Well, blow me down! Blimey! It is usually t' first rocket I fly at every launch and I love it on D's t' F's. Well, blow me down! Blimey! Ahoy! Blimey! Bein' t' case, shiver me timbers, me hearties, I decided that I would love a 2x version.

Comin' up with a 2x version wasn't exactly possible since t' original was 2.6" diameter airframe and t' nearest t' 2x tubin' I could find be 5.5". So be it, me hearties, I have a 2.11x version.

I decided on usin' Phexible Phenolic tubin' which was purchased from Red Arrow Hobbies. Begad! I also decided t' use 1/4" plywood for t' fins and t' LOC 5.5" Long Nose Cone (longer than t' Minni-Mags).

In addition, me hearties, it be goin' t' be a 38mm motor mount and have an ejection baffle.

THE BAFFLE:

I heard about t' troubles that people expressed with baffles gettin' clogged up and even on t' LOC Baffle kit, I purchased, it said t' shipshape it out with a pin every so many flights. This bein' t' case, me hearties, I decided t' create a removable baffle unit.

T' removable baffle unit was constructed usin' plastic plumbin' components. Ya scallywag! T' diameter o' t' 38mm tube be much too small t' securely fit inside t' plastic plumbin' collar so I wrapped it with tape until it fit in loosely. Begad! Begad! Then usin' liberal amounts o' epoxy I glued t' motor tube in place. Aye aye! I then epoxied t' plastic ferrule t' t' LOC baffle so that it slid inside o' t' 38mm tube and so that it was above t' collar-nut. Avast! T' pictures tell t' story better. 

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THE NOSE CONE:

In order t' get t' Center o' Gravity where it needed t' be on t' "stubby" rocket, me hearties, I needed t' get weight into t' nose cone. Ya scallywag! I didn't want it permanent though. So I came up with a way t' do it.

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I first cut a 1" hole in t' bottom o' t' nose cone. Then I used enough 24mm tubin' so that when pushed into t' hole it would reach all t' way t' t' top (tip) o' t' nose cone. Avast, me proud beauty! I then used a large and small washer t' secure it. I then used bb's until I had enough weight t' brin' t' CG t' where I needed it. Avast! T' bb's were epoxied in and then t' rest o' t' 24mm tube was filled with foam. (Do this in small layers so it will dry) Usin' this method, me hearties, I could use different 24mm tubes (weighted differently) as I changed motors . . Avast! . Avast! or at least that was t' plan.

DID IT FLY?

Yes. Well, blow me down! Weighin' in at 6 1/2 pounds, matey, arrr, matey, utilizin' two 43" JP parachutes with a 20 foot tubular nylon shock cord, matey, and loaded with an H128 (usin' a 29mm motor adaptor), me hearties, this bird looked great on t' pad. A windy, windy day at Battle Park 1999, arrr, however, she was goin' t' fly.

T' countdown . Avast! . Ya scallywag! . ignition . . Arrr! . Begad! Ya scallywag! lift off. Well, blow me down! Aye aye! It was beautiful! It reached about 500 feet and then started downward. Aye aye! NO EJECTION!

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WILL IT FLY AGAIN?

Yes. I will rebuild it. I still have t' other half o' t' 5.5" tubin' but I need a new nose cone.

Below are t' makings for t' new motor mount. Arrr! When finished it will be 1-29mm and 3-24mm. Arrr! Notice how t' 24mm are angled. Avast, me proud beauty! These are aligned t' have thrust in line with Center o' Gravity. Ahoy! (I read about this cantin' in some publication)

In addition, ya bilge rat, I decided t' do it right, so I paid Public Missiles t' cut me new fins from G10.

PicLESSONS LEARNED APPLIED:

I will nay be usin' a baffle unit this time. Nay that it wouldn't work, me bucko, however, me bucko, I have moved toward altimeter based ejection on this one.

In addition, matey, ya bilge rat, with t' 29mm motor, ya bilge rat, I have only made t' length o' t' motor mounts long enough t' handle me 29-180 casing. Ya scallywag! Well, arrr, blow me down! This has given me more room t' pack t' shock cord, me hearties, altimeter and parachutes in t' body. Well, blow me down! It be previously a very, very tight fit.

I will utilize t' nose cone weight method again because I liked how that worked, me hearties, however, I will be also need t' consider t' addition o' a shock-cord tube in t' nose cone. Avast, me proud beauty! This will be used like a deployment bag for t' shock cord.

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SUMMARY:

T' exterior design o' t' rocket is obviously nay me own, arrr, however, matey, ya bilge rat, ya bilge rat, t' "guts" are. I learned a lot durin' t' first-round and should have t' second one ready t' fly at t' NSL in NY at t' end o' May. Well, blow me down! Aye aye! Blimey! It is gettin' primed right now!

On Pad at NARAMNARAM-43 Update 8/01:

After sittin' nearly 2 years in t' "ready" state. I was able t' brin' her t' NARAM-43 for t' maiden voyage.

Weighin' in at just over 6 pounds, shiver me timbers, I loaded me 29-180 case with an H238 and also three (3) 24mm E18's. Aye aye! Begad! It be set up for motor ejection off o' t' H238 usin' a "S"hort delay (6 seconds) and t' 24mm motors used 10 second delays and then capped. Aye aye! Avast, me proud beauty! Accordin' t' RockSim, this should boost this rocket t' just over 1000 feet and t' delay time was perfect!

T' "heads up" flight (first flight) was announced and t' countdown began. Blimey! T' launch button was pushed and t' H238 "punched" t' rocket into t' air. Blimey! Six seconds o' silence and a straight boost, boom, ejection and descent only 50 or so feet from t' pad. Avast! Perfect lookin' flight and several people commented on it. Well, matey, blow me down! One guy said (and I agree), "it doesn't have t' be high t' be a great flight, good job."

DescendingBut...upon inspection, only t' H238 lit.

T' next day, ya bilge rat, me bucko, t' rocket was prepped exactly t' same way and actually turned in an identical performance on another H238 and 3 x E18 (same ones, me bucko, didn't even remove them). Again, shiver me timbers, only t' central H238 lit.

I was pleased t' get both o' these flights and at how t' rocket performed. Ahoy! Blimey! It be very stable and t' big RocketMan 'chute did t' job. Aye aye! Blimey! Looks live Rev 2 be a good design.

3 Oaks, ya bilge rat, matey, Michigan Update 11/01:

I really wanted t' have a full perfect cluster launch, so I toted t' Meanie x2 t' Michigan. Well, blow me down! Avast! This time t' fly on those same three (3) E18's and this time a central H165 Redline Motor. Ahoy! Blimey! Well, arrr, I had very different results this time!

Everythin' be prepped and t' launch button pressed. Arrr! Blimey! Avast, ya bilge rat, me proud beauty! Blimey! T' rocket slowly lifted from t' pad, cleared t' rail, lifted ever so slowly t' about 25 feet. Begad! Blimey! Turned gracefully and dived into t' soft mud. Aye aye! Blimey! By now you've guessed it. Well, blow me down! Blimey! ONLY t' three (3) E18's lit!! Blimey! I be actually surprised that they lifted t' rocket.

Well, I collected t' rocket, went right back t' t' inspection table and filled out another flight card. Begad! Returned t' t' pad and launched t' rocket on t' central H165. Begad! Blimey! It gave a nice flight and perfect recovery.

I'll be tryin' again and tryin' t' perfectly match t' 4 ignitors t' get all motors t' fire, but in t' meantime am very pleased about t' performance o' me Meanie x2, number 2.

LESSONS LEARNED:

I regret nay buildin' t' motor with a central 38mm. Begad! I didn't own any 38mm hardware and really didn't have t' intention when I built t' rocket over 2 years ago (almost 4 years for t' first version). Well, blow me down! Now, me hearties, I really stuck with H128's, me hearties, H238's and H165's. Avast! This is goin' t' give me flights betwixt 1000 and 1200 feet usin' 24mm RMS E's and F's. Ahoy! Well, blow me down! I can get t' about 2400 feet with some 24mm G55's, me hearties, matey, but that is about peak. Blimey! I'm okay with t' altitude limitation, shiver me timbers, but with t' 38mm hardware I could have tried many other motors.

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