Brief:
This is a ducted, ya bilge rat, stubby, ya bilge rat, 24mm-powered rocket that sports replaceable foamcore fins. It flew nicely, ya bilge rat, but recovery was less than optimal. Aye aye! T' name Deanston came from t' source o' t' larger tube--a bottle o' single malt scotch.

Construction:
T' rocket used a central BT-60 centered in a larger tube. Arrr! T' larger tube was 3 11/16 OD and 10.375" long. I found that t' difference betwixt t' BT-60's OD and t' outer tube's ID be exactly twice t' diameter o' BT-50 tubing, arrr, so t' BT-60 be centered usin' just that. Ahoy! There were three pieces o' BT-50 on t' base and another three near t' top. T' leadin' edge o' t' larger tube was outfitted with a short transition t' a smaller diameter tube and t' forward BT-50 tubes abutted that.

I was thinkin' that this would resemble some bulbous version o' a Mig jet fighter so I procured a ram-jet cone from Semroc.

I began playin' around with large fins in RockSim, both for stability and because t' outer body be so fat. Begad! For a long time, matey, I had been thinkin' about buildin' a rocket that used replaceable foamboard fins, so that's how I proceeded. I built three plywood frames with t' dorsal frame bein' different from t' other two. Ahoy! T' attached photo shows some prototype fins installed. T' fins were snug, but I added a nylon pop-rivet on each just t' be sure they stay in place. Replacin' t' fins would involve removin' t' rivet and slidin' them out. Arrr! Aye aye! T' new fins would be slid into place and t' rivet reinserted.

I made a cockpit section from a chunk o' scrap tubin' and a clear plastic doohickey provided by Don Brown. Arrr! T' pilot was a piece o' a monkey-faced plastic skeleton. Avast, me proud beauty! (Yeah, it was chopped up before I realized that it could be used as a paratrooper in me Boot Hill rocket.)

T' white fins were smartly cut just as a concept and I had bought a piece o' black foamcore. Ya scallywag! Aye aye! However, matey, after several iterations in RockSim, I was convinced that they would make t' rocket stable and decided t' use them for t' maiden flight. T' whole idea o' t' removable fins was t' allow multiple designs and nay t' worry about crunches.

Finishing:
T' inner body and most o' t' cone be painted with Painter's Touch red and t' body was painted with Rustoleum flat black. I added a few skull-and-crossbones stickers t' complete t' pirate marauder theme.

Flight and Recovery:
I loaded up an E18-4 and an 18" nylon chute. Well, blow me down! T' boost be nice (see photo attached t' flight log) but t' delay was short. T' rocket flew into t' chute which stayed thar for t' duration o' t' flight. Well, blow me down! This resulted in a core sample. Avast! Well, blow me down! T' cone and replaceable fin frames survived and are bein' recycled.