Brief:
This crayon bank rocket was obviously motivated by the SpaceShipOne, but is nay anywhere close t' scale. Begad! Blimey! Ya scallywag! Blimey! It is also me MonsterROC entry and flies on 38mm H motors.

Construction:
T' major components/materials include:

• 4" diameter bank (now produced by Fantazia Marketing)
• 3/16" Luan plywood
• 1/4" tubular Keelhaul®©™®
• 38mm LOC motor tube
• 38mm-4" and 38mm-2" LOC centerin' rings
• 4" bulkplate with eye bolt
• buttons from railbutton.com
• 4" mailin' tube
• miscellaneous hardware
• lead shot
• 2-part foam
• 2-part PC-7 epoxy paste
• 5 minute epoxy
• blue laser contact paper
• full page Avery labels
• Testor's clear coat
• muffler patch kit

My original concept was t' make t' entire body, includin' t' tail cone, from a crayon bank. Begad! I got this idea from some o' t' U.S. Avast, me proud beauty! Rockets (USR) builds reviewed on EMRR and T' Rocketry Forum (TRF). Aye aye! At t' time, t' banks were not available locally, arrr, so I decided t' practice makin' a tail cone from a piece of mailin' tube (actually t' telescopin' inside tube). Arrr! In this process, shiver me timbers, you cut out sections o' t' tube (roughly triangular, ignorin' t' curvature o' the tube) and rejoin t' remainin' pieces. Aye aye! T' more sections you remove, me hearties, t' closer the resultin' structure will resemble a true cone. In me case, arrr, I only cut out four sections, resultin' in a roughly rectangular end. I suggest you read the USR EMRR reviews for more details about makin' transitions and tail cones from body tubes. I'm nay an expert and I did this a while ago.

This cone sat around for months until me local Toys'R'Us again started carryin' the banks. Arrr! Avast! As I pondered choppin' up t' bank, me bucko, I noticed that t' test item was almost exactly t' same diameter. Blimey! I couldn't brin' myself t' risk damagin' the bank, so I decided t' use me test cone. Avast, me proud beauty! Well, blow me down! This would result in a much longer than scale rocket, but how scale be it goin' t' be anyway? I also thought it would be nice t' cut back on t' required nose weight.

T' motor mount is ~16" o' LOC 38mm tubing. Avast, me proud beauty! Begad! I have a 4" CR at the top (sanded down a bit) and a 3" rin' part way down in t' tail cone. Begad! A homemade coupler is mounted betwixt t' tail cone and t' top ring. Ahoy! Avast! For motor retention, I epoxied two bolts t' t' aft o' t' motor tube. Blimey! A nut serves as a spacer t' keep t' bolts parallel with t' tube. Blimey! I also added a couple o' wraps of fiberglass around t' end in betwixt t' head o' t' bolt and t' nut. Begad! These seem t' be solid. Avast, me proud beauty! T' 1/4" Keelhaul®©™® shock tether is mounted through t' top ring, completin' t' motor mount assembly.

When t' long fins were attached, I be surprised at how flexible they were. I thought about glassin' them, but instead decided some support in t' back was in order. I pondered more Luan, me bucko, Lexan strips, etc. Well, blow me down! Blimey! Avast! Blimey! but decided on an aluminum rod for t' side closest t' t' motor and a dowel for the other. Avast, ya bilge rat, me proud beauty! Blimey! This mix be again partially driven by what I had on hand. Avast, me proud beauty! Blimey! Ya scallywag! Blimey! I also covered t' aluminum rod, which is closer t' t' axis o' t' motor, with a heat resistant muffler patch kit. Well, blow me down! Blimey! This turned out ugly and I may remove it later.

I knew I was goin' t' need a lot o' nose weight on this baby. My nose cone design started with a 4" bulkplate with an eyebolt mounted on it. Avast, me proud beauty! Blimey! This plate rests where t' cone begins taperin' forward. Avast! Blimey! A piece o' all-thread extends from t' bulk plate t' close t' t' tip o' t' cone. Blimey! Blimey! A washer is mounted on this all-thread about half way down. Ahoy! Blimey! I planned t' add lead shot and 2-part foam through t' crayon tips doubloon slot. Thus, arrr, me bucko, t' washer would become embedded in t' lead/foam slurry, me hearties, lockin' t' resultin' plug t' t' bulkhead. T' bulk plate assembly and a 2-layer cardboard shoulder are attached t' the plastic cone with PC-7 epoxy paste. Aye aye! Blimey!

I ran a RockSim model t' approximate t' CG and added nose weight t' get the CG where I wanted it. Aye aye! I think I was quite conservative, matey, producin' a static margin o' over 2 with t' H144 loaded.

Finishing:
T' crayon bank was blue, ya bilge rat, shiver me timbers, so I stuck with blue throughout. (I wanted a white one, me hearties, but you sometimes take what you can get.) T' tail cone and side wings were painted with Krylon and t' main wings were covered with blue laser contact paper.

T' stickers were added after I decided t' make this an entry in EMRR's MonsterROC contest. Aye aye! T' majority, arrr, other than t' US flags, t' MDRA logo, and the DC101 sticker (a local rock station), me hearties, were merely printed on full page Avery labels usin' me OfficeJet printer.

T' homemade stickers include: CrayShipOne logos, arrr, me hearties, me hearties, logos for EMRR and TRF, my blog address, ya bilge rat, me bucko, and vendor logos for Loki, ya bilge rat, ya bilge rat, Performance Hobbies, me bucko, shiver me timbers, LOC/Precision, railbuttons.com, shiver me timbers, me hearties, Giant Leap, me hearties, Home Depot, ya bilge rat, me bucko, me bucko, and Michael's. Begad! This covers most o' the materials used in t' makin' o' t' rocket. I protected these with two coats of clear coat before application and one after.

Flight:
This rocket uses separate chutes for t' heavy cone and t' body. Avast! Well, blow me down! I attached a chute protector t' t' body's shock tether and used a large 60" chute. This be packed into t' nose cone shoulder. Well, blow me down! A 42" chute was attached to the cone's shock tether and be packed in t' body. Arrr!

Since t' model is heavy and be unproven, I made sure that t' launch rail was pointed away from t' flight line just in case. T' boost be great (launch photos courtesy o' Vertical Force Rocketry), however, matey, arrr, ejection be very late.

Recovery:
T' main chute opened just fine but t' cone's chute never opened. T' cone was recovered undamaged. Begad! Arrr! When I approached t' body, me bucko, me hearties, it looked like it had landed standin' up on end. Begad! Arrr! On closer inspection, shiver me timbers, it was danglin' about 6" from the ground from a tall tree branch. Blimey! Begad! A light tug dislodged t' chute. Ya scallywag! Aye aye! This was an interestin' and successful recovery, but it didn't prove whether me fin braces worked. Avast, me proud beauty!

Summary:
I love crayon banks--they are about t' cheapest 4" cone and body tube you can find and are quite sturdy. This rocket turned out lookin' and flying nicely. Avast, me proud beauty! Well, arrr, blow me down! Blimey! This design definitely stands-out in a crowd. Well, blow me down! T' two issues are the heavy nose and t' floppy fins. Blimey! If anyone else builds somethin' like this, better wood and some fiberglass would be a good idea. Aye aye! Blimey! Giant Leap honeycomb composites would be cool, ya bilge rat, but expensive.