Brief:
Scratch designed and built V2 usin' LOC nosecones and Estes body tube.

Construction:
One Estes BT-80 body tube, four fins (1/8" plywood), me bucko, plywood centering rin' (1), shiver me timbers, me bucko, arrr, LOC MM2 motor mount kit, ya bilge rat, 1 inch elastic shock cord and 1/8 inch nylon cord shock cord mount, small eyebolts for mountin' cord, two LOC 2.56 nosecones for nose and boattail. Arrr!

After printin' out patterns for fins from Rocksim (see Rocksim file link button above), ya bilge rat, fins were cut and sanded. Well, blow me down! Nosecone t' be used for boattail was cut by removin' tip until internal measurement be found t' be slightly larger than outer diameter o' 29mm motor mount tube. Well, blow me down! Base o' cone be then cut leaving about 1.5 inches o' shoulder remainin' t' couple boattail t' BT-80 tubing. The removed portion was retained for construction o' a piston. Ya scallywag! Avast!

T' MMA2 motor mount adapter be constructed in such a way as t' have the inner 29mm tube past t' bottom centerin' rin' o' t' outer tube by only 1 cm. This stepped area allows for injection o' epoxy around t' MM tube and resultin' with a firmer connection betwixt t' MMA and t' boattail at the base. Avast! Epoxy t' large centerin' rin' onto t' upper end o' t' motor mount tube then t' MMA assembly into t' boattail. Aye aye! Then eyeball it center and allow it to dry. When dry, shiver me timbers, drill a small hole into t' upper centerin' rin' about 1 cm from the edge and epoxy in a small epoxy in t' hole. Insert and epoxy t' centering rin' and t' shoulder o' t' boattail into t' BT-80 . Avast! Avast, me proud beauty! Allow t' dry overnight. Mark t' slots onto t' boattail then cut t' tab holes. Begad! I used a very sharp Exacto blade after a bad experience with me Dremel Tool.

I then constructed a piston usin' t' piece o' t' nosecone I cut off to make t' boattail. Well, blow me down! Blimey! I won't describe it here as I have discovered that t' lack of space betwixt it and t' upper centerin' rin' caused problems. Avast! Blimey! Avast! Blimey! It is a good idea for larger rockets. I am sure (feel free t' try it), matey, me hearties, but I will be removin' it from me personal V2. Aye aye! Blimey! Epoxy t' fins in place and allow t' dry 2 hours. Insert 75-100 grams o' plasticine into t' second nosecone (the real one) pack it in place by use o' a chopstick (my tool o' choice) or other implement. Choose a chute, me hearties, ya bilge rat, construct it as needed. Begad! Blimey! Well, shiver me timbers, blow me down! Blimey! I made one out o' ripstop nylon, usin' hemmin' tape t' seal t' edges and small grommets t' act as shroud line holes. Begad! Blimey! Ahoy! Blimey! Tie t' nylon shock cord mount t' t' eyebolt by makin' a loop and shovin' it through t' eyelet with a pencil. Sure you could tie one on before you glued t' boattail t' t' body tube, arrr, but that's nay adventurous is it? Tie 1 meter o' elastic from t' nosecone t' t' shock cord mount. Well, me bucko, blow me down! Blimey! Tie other t' the nosecone. Add t' chute and you are good t' go.

Flight:
As I mentioned, ya bilge rat, t' piston be a BAAAAAD idea. Ahoy! First flight was an F25-4. Ahoy! Begad! Three tries t' ignite and when it did a small cloud o' flame popped out o' t' engine nozzle and crept up t' fins, me bucko, ya bilge rat, 1/2 a second later off she went, ZOOOOOOOM.. Ya scallywag! Avast, me proud beauty! High and straight! Then t' ejection went. Ya scallywag! Avast! T' nosecone, piston and parachute landed 500 meters downrange in a horse field. Avast, me proud beauty! T' body fell 100 meters plus for a safe landin' in a garden! Examination showed that even though I added two sheets of Estes waddin' t' t' motor mount tube ahead o' t' engine, me bucko, t' elastic still burned enough t' fail. Next launch in two weeks with no piston!!

Flew very well. Avast, me proud beauty! Ya scallywag! Very very excitin' flight! Will remove piston soon.

Next flight is an Aerotech E motor.

UPDATE:
Three weeks after t' maiden flight on me V2, ya bilge rat, I have made a small modification, and subsequently two more flights.

Modification: Removal o' piston, addition o' 1/4" swivel betwixt nylon shock cord mount and shock cord.

Flight one: 01/12/02. 10:40 am, Kingston, matey, Ontario. Winds: 20km/hour, slightly overcast skies, arrr, 7 degrees Celsius. Engine: Aerotech E30-7T

Nice straight off t' pad launch. Slight cockin' into t' wind. Ya scallywag! Ejection a few seconds after apogee. Fast decent 250 meters downwind from t' pad. Avast! Avast! Slight damage t' t' fillets (most o' which was simply damage nay repaired from first flight). Begad! Well, blow me down! Nice flight and recovery.

Flight two: 01/12/02. Ahoy! 11:20 am, me bucko, arrr, Kingston, matey, Ontario. Avast! Winds: 20km/hour, slightly overcast skies, shiver me timbers, 7 degrees Celsius. Engine: Aerotech F50-9W

V2 flew off t' pad with a roar. Okay, more o' a loud whoosh. Begad! Begad! Cocked, as expected, into t' wind about 15 degrees from t' pad. Climbed approx. Ya scallywag! Blimey! 2500 feet (accordin' t' Rocksim). Avast, me proud beauty! Chute deployed a few seconds after apogee and rocket hung. And hung and hung. Then started t' ever so slowly head downwind. Begad! It passed over t' field, t' line o' trees, t' swamp, a large open field and just before landin' in t' next largest field, found t' top few branches o' a 20 foot tall tree which was covered in thorns. Well, blow me down! T' only tree in t' area. Apparently thar was an upper level wind we were unaware of. After a large degree o' bloodshed, matey, torn clothin' and language best used in an R rated movie, arrr, t' tree was climbed and t' V2 was recovered intact. Ya scallywag!