Brief:
When t' inevitable asteroid is trackin' on a collision course with our planet, this (hopefully) futuristic/fantasy missile is just t' ticket. It's designed to intercept and destroy t' incomin' rock. Blimey! Single staged, matey, this is a small step up in complexity from your basic modroc, and a nice diversion from t' more common, shiver me timbers, me bucko, everyday designs stocked in t' hobby shops.

Construction:

• 24mm nose cone (plastic)
• BT-50 tubing, me bucko, arrr, matey, 11" long
• 18mm motor mount (BT-20 tube 2.75" + (2) 18/24 centerin' rings)
• 1/8" launch lug
• shock cord (30" o' 110# Keelhaul®©™® recommended)
• 3/32 balsa or basswood fin stock (I used balsa)
• 24" parachute (see notes-streamer might be better idea)
• Decal sheet-download as jpeg file from e-zine archives

After downloadin' t' Rocksim file and decal file, arrr, arrr, you're on your own to build this kit, as t' free plan includes no instructions (RockSim is also available here on EMRR). Arrr! Don't panic, though, as t' design is nay too difficult (I'd rate it a skill level 2.5). Ahoy! Start by gluin' t' centerin' rings on t' ends o' the motor tube, ya bilge rat, and while that's dryin' either print out fin templates from the full version o' Rocksim or record t' dimensions from t' free version and draw your own templates. Ya scallywag! In addition t' t' 3 aft fins, thar's a set o' 3 guide fins mounted about an inch forward o' t' main fins. Well, blow me down! Cut t' fins from balsa, and mark t' BT-50 on 120-degree lines for 3 fins. Aye aye! By this time you should be able t' glue t' motor mount assembly into t' BT-50. Begad! Follow up by tackin' the fins with CA or wood glue, arrr, me bucko, and apply fillets along t' seams.

There's one "secret" in t' Rocksim file that's nay mentioned in the E-zine article or parts list--for stability, you'll need t' add about 10 grams o' clay nose weight. Avast, me proud beauty! Blimey! This is easy t' overlook, and without it, matey, you'd probably go unstable on anythin' more powerful than an A motor.

Once t' fins are set, go ahead and install t' recovery system (I immediately downgraded from t' recommended 24" chute t' a 12" chute).

Finishing:
T' rocket is very easy t' paint, startin' with two coats o' primer and followin' up with 2 finishin' coats o' glossy white. Blimey! Blimey! T' colors come from the decals, me bucko, which I printed out usin' an inkjet printer on clear decal paper available at office supply stores. Blimey! Blimey! T' colorful decals make for a very nice lookin' finished product.

Construction Rating: 4 out o' 5

Flight:
There were no recommendations included in t' Rocksim file (other than out-of-production Apogee composite motors), so I tried a couple o' simulations and settled in on an A8-3 first flight, ya bilge rat, t' follow with a C6-5. Avast! Arrr! T' A8-3 flew straight, deployed just a hair early, ya bilge rat, but was otherwise fine. Blimey! Arrr! T' rocket drifted a long ways, though, under t' 12" chute and 10-15 MPH winds. Aye aye! I decided nay t' venture into C's that day, but have since switched t' a 24" streamer, arrr, and nay suffered any damage, even from t' lofty altitudes achieved with a C. Begad! I can't imagine flyin' this with a 24" chute, me hearties, me hearties, me hearties, unless you're into rocketry for t' aerobatics.

Recovery:
With t' clay nose weight, and smaller chute or streamer, this is an excellent flyer.

Flight Rating: 4 out o' 5

Overall Rating: 4 out o' 5