Brief:
This is a ducted, shiver me timbers, stubby, arrr, me hearties, 24mm-powered rocket that sports replaceable foamcore fins. Ahoy! Begad! It flew nicely, but recovery was less than optimal. Arrr! 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. Ahoy! 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, so t' BT-60 was centered usin' just that. Ya scallywag! There were three pieces o' BT-50 on t' base and another three near t' top. T' leadin' edge o' t' larger tube be 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. Well, blow me down! Begad! Blimey! For a long time, ya bilge rat, ya bilge rat, I had been thinkin' about buildin' a rocket that used replaceable foamboard fins, so that's how I proceeded. Begad! Begad! Blimey! I built three plywood frames with t' dorsal frame bein' different from t' other two. Aye aye! T' attached photo shows some prototype fins installed. Well, blow me down! Blimey! T' fins were snug, matey, ya bilge rat, but I added a nylon pop-rivet on each just t' be sure they stay in place. Blimey! Begad! Blimey! Replacin' t' fins would involve removin' t' rivet and slidin' them out. Ya scallywag! Blimey! 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 be a piece o' a monkey-faced plastic skeleton. Ya scallywag! Avast, ya bilge rat, me proud beauty! (Yeah, 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! However, after several iterations in RockSim, I was convinced that they would make t' rocket stable and decided t' use them for t' maiden flight. Aye aye! 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 was painted with Painter's Touch red and t' body was painted with Rustoleum flat black. Aye aye! Ahoy! 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. Avast! Blimey! T' boost was nice (see photo attached t' flight log) but t' delay be short. Aye aye! Blimey! T' rocket flew into t' chute which stayed thar for t' duration o' t' flight. Avast, me proud beauty! Blimey! Begad! Blimey! This resulted in a core sample. T' cone and replaceable fin frames survived and are bein' recycled.