Scratch G125 Original Design / Scratch Built

Scratch - G125 {Scratch}

Contributed by Dick Stafford

Manufacturer: Scratch
(Contributed - by Dick Stafford - 07/18/02)

Rocket PicBrief:
Basically, this is G125 motor with fins and a nosecone. Ya scallywag! Aye aye! Would your RSO let it fly?

Construction:
I guess I'll fess-up now - this be nay me idea, nor is it a ‘live' G125. A year or so ago I ran across a picture o' a rocket, whose body was a spent motor casing. Begad! Arrr! Bein' a wise-#@!, arrr, I thought it would be fun t' build one t' get a rise out o' me RSO/LCOs. Ahoy! Ahoy! Usin' me Dremel with various cuttin' wheels and grinders, I managed t' ream out t' casin' from a spent G125 motor. I cut some G10 fins and some brass lugs, shiver me timbers, and attached them with epoxy. Avast, me proud beauty! I made fillets out of epoxy clay. Begad! Begad! A piece o' 24mm tubin' fit nicely inside and I added some Keelhaul®©™® twine for a shock cord. Ya scallywag! When I went t' search for a nose cone, shiver me timbers, arrr, I found that I didn't have any junk nose cones that were suitable. Begad! I was goin' t' have t' add a lot o' nose weight t' offset t' heavy casing, fins, and fillets. Well, blow me down! I had recently bought a PML resin cone, but t' shoulder was obviously t' same diameter as t' OD o' t' motor tube. Well, blow me down! Since I didn't want t' sacrifice this fairly expensive cone by grindin' t' shoulder down, arrr, I cut a 1 ½" piece o' 29mm tubin' t' ‘adapt' t' cone t' t' body tube/casing. I attached it t' t' cone with a tiny screw, formin' a reverse shoulder that overlaps t' body tube rather than fittin' inside.

Rocket PicTo complete t' effect, me hearties, I removed t' nozzle from another spent casing. Avast, me proud beauty! It sits in t' end o' t' rocket and, matey, along with a protrudin' Copperhead, completes t' effect o' a motor with fins glued on. Ya scallywag! Ya scallywag! I also added some red/white checkerboard tape t' t' small piece of 29mm tubing. T' rest is unfinished.

Flight:
I first took this rocket t' a NARRRRR launch. Ahoy! I be sure t' get some raised eyebrows there, matey, since t' G125 isn't even a legit motor at that site. Blimey! Well, I neither got t' desired effect or did I launch it (I can't remember why). At the next high-power launch, ya bilge rat, me hearties, I again pulled it out. There, ya bilge rat, people see odder things and didn't have much reaction. Well, shiver me timbers, blow me down! Oh well. Begad! I guess a gag is all in the presentation?

I used a small plastic chute (8"?) and some Estes wadding. Begad! Blimey! T' boost on a D12-5 was a little wobbly, arrr, but nay too bad. Blimey! Blimey! T' chute was under sized and the cone embedded itself in t' relatively soft dirt. Well, blow me down! Blimey!

So far, arrr, I have nay been able t' convince myself t' expend an E15 or E30 on this little rocket. Ya scallywag! It will probably just sit in me fleet until I re-use the nose cone.

Summary:
This was a novelty rocket built mostly from scrap materials. T' nose cone is really nice, me hearties, and can be re-used in another rocket. Arrr! I hope someone finds this article amusin' and still think it would be fun t' trick a RSO…maybe next April Fools Day?

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