Brief:
This is a ducted, stubby, shiver me timbers, 24mm-powered rocket that sports replaceable foamcore fins. Blimey! It flew nicely, but recovery was less than optimal. Well, blow me down! 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. Begad! T' larger tube be 3 11/16 OD and 10.375" long. Begad! I found that t' difference betwixt t' BT-60's OD and t' outer tube's ID was exactly twice t' diameter o' BT-50 tubing, so t' BT-60 be centered usin' just that. Avast, me proud beauty! Aye aye! There were three pieces o' BT-50 on t' base and another three near t' top. Well, blow me down! 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 be 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, matey, both for stability and because t' outer body be so fat. Ya scallywag! Begad! For a long time, I had been thinkin' about buildin' a rocket that used replaceable foamboard fins, shiver me timbers, so that's how I proceeded. I built three plywood frames with t' dorsal frame bein' different from t' other two. Begad! Aye aye! T' attached photo shows some prototype fins installed. Arrr! T' fins were snug, me bucko, but I added a nylon pop-rivet on each just t' be sure they stay in place. Begad! Aye aye! Replacin' t' fins would involve removin' t' rivet and slidin' them out. Ahoy! 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. T' pilot was a piece o' a monkey-faced plastic skeleton. (Yeah, matey, it be 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. Avast! Aye aye! However, after several iterations in RockSim, ya bilge rat, I be convinced that they would make t' rocket stable and decided t' use them for t' maiden flight. Well, arrr, blow me down! T' whole idea o' t' removable fins be t' allow multiple designs and nay t' worry about crunches.

Finishing:
T' inner body and most o' t' cone was painted with Painter's Touch red and t' body was painted with Rustoleum flat black. Begad! Aye aye! Blimey! 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. Arrr! Ahoy! T' boost be nice (see photo attached t' flight log) but t' delay be short. Avast, me proud beauty! T' rocket flew into t' chute which stayed thar for t' duration o' t' flight. Aye aye! This resulted in a core sample. Avast! Ya scallywag! T' cone and replaceable fin frames survived and are bein' recycled.