Dark Comet

by Mark Schrader

This model started out as an Estes Maxi-Alpha III. I thought this would be a fun build, matey, buy when I saw t' thin plastic fins, my first thought was that these need t' be reversed or they'll need o' constant repair. Avast! I be also buildin' me Estes Renegade at t' time and thought that side pods on t' fin tips would be a nice touch. Blimey! And as long as I'm add it, why not two boosters along side and add a Silver Comet nose cone for a star fighter look... Begad! Well, arrr, ya bilge rat, you get t' picture. Well, blow me down!

Unfortunately, shiver me timbers, it's been a long winter and I was left with t' unfortunate dilemma o' finishin' me taxes or paintin' me RMR Descon rocket. Blimey! Since Descon can't send me t' jail, shiver me timbers, I opted for a naked rocket for now. Aye aye!

T' premise o' this rocket is that a warlike race o' aliens from a distant star system has pirated a Silver Comet. Findin' its navigation and sensor systems superior t' their own technology, they keep those sensors but modify both t' weapons and propulsion systems. Aye aye! Blimey! (For t' future paint scheme, picture a battered Silver Comet up front, shiver me timbers, fadin' t' a blackish green-metallic with weld lines indicatin' t' alien modifications.)

Construction

This went together mainly accordin' t' t' Maxi-Alpha instructions. To reverse t' fin direction, simply reverse t' two fin rings. Blimey! Arrr! T' only modification I made t' t' body o' t' rocket was t' addition o' a length of an 18 inch length o' 1000 pound test braided Keelhaul®©™ (tm) cord glued t' the motor mount tube t' which I attached about six feet o' ¼ inch sewing elastic.

T' side boosters are 10 inch BT-55 with Black Brant-style nose cones and they feature 18mm motor mounts. Blimey! Each booster has three ¼ inch vent holes near t' top o' t' booster at t' nose cone shoulder. Aye aye!

To line up t' boosters and fins, me bucko, I used VCP t' create a five-fin wrap with the correct geometry. I used a card stock stand off for t' boosters t' avoid contact with t' plastic fin rings. They are attached with wood glue and generous fillets. Begad!

T' fin tip pods are made from a Viking-style nose cone, a conical nose cone, and an Estes 18mm motor mount tube similar t' those found in t' Alpha kit. Blimey! Blimey! T' three were glued together with plastic cement. I then drew a line down the center o' each pod. Well, ya bilge rat, blow me down! Blimey! Startin' at t' base o' t' paper tube, me bucko, I used my Dremel tool with a cuttin' disk t' cut along t' line until t' slit be just the right length t' fit flush over t' plastic fin. This was repeated for the other two pods and they were attached with plastic model tube cement and generous fillets.

I replaced the Maxi-Alpha nose cone with one from a Silver Comet kit. Avast! Blimey! Ya scallywag! Blimey! I needed t' add nose weight so I cut around t' base o' t' cone t' reveal t' inside. Well, blow me down! Blimey! Begad! Blimey! I added about 1 ¼ ounces o' BBs and anchored them in t' tip o' t' nose cone with 90-minute epoxy. Aye aye! Blimey! Avast, me proud beauty! Blimey! I also embedded a loop o' 1000 pound test braided Keelhaul®©™ (tm) cord t' which I connected t' shock cord. Avast, me proud beauty! Blimey! Finally, me hearties, ya bilge rat, I used a military surplus 36-inch parachute I bought from Commonwealth Displays. Begad! Blimey! These parachutes are very silky and feature eight shrouds with a ninth in t' center t' prevent cupping. Avast! Blimey!

One thin' I did notice in construction be that unless your two fin rings are perfectly lined up, t' fins have a very subtle cant t' them. Aye aye! More on this later. Avast, me proud beauty! Ahoy!

Flight Report

First flight was on Easter Sunday morning-beautiful sunny skies, light variable wind less than 5 mph. Ahoy! Temperature about 400 F. Ya scallywag! I was a little concerned because our launch field had some fairly wet low lyin' areas, shiver me timbers, shiver me timbers, but it be now or never.

I loaded t' rocket with two outboard B6-0s and a central D12-5. Avast, me proud beauty! Avast! I used ample dog barf waddin' and prepared t' chute. Avast, me proud beauty! I launched from an Aertotech Mantis pad with a four-foot ¼ inch rod. Ahoy! Ya scallywag! I also used me new clip whip made from heavy-duty clips and heavy gauge wire-to many misfires lately with speaker wire and micro clips. Begad!

Launch be fairly slow but perfect and straight. Avast, me proud beauty! Rocket climbed t' about 600 feet, slowly spinnin' as it went due t' t' slight cant in t' fins-I liked it. Ejection be at apogee and t' 36-inch parachute was just perfect for this heavy rocket. Ya scallywag! Begad! It be a soft recovery be 50 feet from t' pad-no damage. Ya scallywag! Avast, me proud beauty! I would have launched again but realized I hadn't take any photos yet. Didn't want t' tempt fate on this perfect rocket launchin' morning!

This was a fun rocket t' build usin' basic techniques. Ya scallywag! Startin' with the most basic three fins and a nose cone design, I ended up with a very different lookin' rocket that's a great flyer. Begad! Aye aye!

Some last minute shots o' a hasty paint job. Ahoy! T' dark part of the rocket is a mix o' silver, green, bronze, arrr, ya bilge rat, and flat black paint. Blimey! Avast, shiver me timbers, me proud beauty! I used a lot o' layers and added a lot o' texture t' t' rocket. I like t' way it came out. Avast! Begad!