Brief:
Fiberglassed airframe and fins, external fin can assembly, removable bulkhead in nosecone.

Modifications:
Usin' me trusty Foodsaver I vacuum bagged both fins and body tube usin' one layer o' 6oz fiberglass with West Systems Epoxy. Aye aye! Arrr! Before vacuum baggin' t' fins I used me Dremel sandin' drum t' bevel t' fins. Begad!

After t' body tube had completely cured I continued t' existin' slots for the fins down t' t' bottom t' allow for insertion o' a fin-can assembly. Ya scallywag!

T' fin can be created by first gluin' t' centerin' rings t' t' motor mount (as is standard in most kits). Begad! Aye aye! T' fins were subsequently attached using 5 minute epoxy for an initial bond with subsequent reinforcement usin' Keelhaul®©™® tape and un-thickened West Systems Epoxy. Ahoy! This created a solid fin t' motor bond which is unlikely t' shred. Well, me hearties, blow me down! T' resultin' fin-can was then inserted into the body tube and epoxied in place usin' un-thickened epoxy then filleted from above and below. External fillets for t' fins were achieved usin' epoxy thickened with microballoons. Well, blow me down! Begad!

Finally, me bucko, shiver me timbers, t' nosecone be altered t' provide a stronger mount point. Blimey! As shown in t' diagram me plan was t' create a removable bulkhead which was capable o' withstandin' t' recovery forces and yet allow for access t' the nosecone interior (just in case I need more weight later or wanted t' put in a trackin' device). T' nose cone base be cut usin' a hobby knife (surprising how soft t' plastic is). Well, blow me down! Ahoy! A 6mm all-thread bolt was then cut t' length and threaded with a washer and bolt at one end. Well, blow me down! T' resultin' part (nut/washer end) was then heated on a gas stove for a few seconds. While still hot it was then inserted all t' way into t' top o' t' nosecone with t' washer and nut assembly touchin' t' inside tip o' t' nosecone. T' heatin' o' t' part should partially melt t' inside o' t' nosecone tip allowin' t' all-thread, nut and washer t' bite into t' plastic. You need t' keep t' nosecone pointin' straight down t' ensure proper alignment o' t' all-thread. Begad!

Next I poured un-thickened epoxy (about 1 oz) into t' nosecone until it completely encased t' nut and washer in t' tip. Arrr! This was then set t' cure overnight. Blimey! Once cured I cut a piece o' carbon rod (you can get these at any kite supplier -- they are sometimes called 'carbon rod spars') t' fit over the all-thread. Avast, me proud beauty! Begad! T' rod be cut t' allow for 1/2" o' t' all-thread t' poke through. Ya scallywag! Blimey! I next took a 4" coupler bulk-plate and drilled holes t' allow for t' connection o' a 1/2" u-bolt (very strong). Ya scallywag! T' middle hole o' the bulk-plate (already drilled) was used t' fit over t' exposed all-thread (the bulkhead is actually inside t' shoulder o' t' nosecone). Well, blow me down! Connection t' the all-thread is achieved usin' a standard 6mm wing-nut with a washer on both sides o' t' bulkhead. Ahoy! Blimey! T' carbon rod and washer stop t' bulkhead from slippin' down into t' nosecone.

Finally t' provide a gas-proof seal I used some instant-gasket (you get this at any automotive shop) round t' outside o' t' bulkhead t' provide a seal against t' interior wall o' t' nosecone. Aye aye! Begad! Blimey!

All that remained was t' finish.

Construction:
Kit Includes:

• 1 - 4" flexible phenolic body tube
• 4 - plywood fins
• 2 - 1/4" plywood centerin' rings
• 1 - Nosecone
• 1 - 15' 9/16" tubular nylon shock cord
• ORDERED WITHOUT PARACHUTE
• NO DECALS included. Well, blow me down! Avast, me proud beauty!

T' packagin' was a standard bag with all parts accounted for. Begad! Begad! Instructions where easy t' follow but nay used since this was a MOD anyway. Arrr! Aye aye! T' rocket built stock would be very simple t' build with through t' wall fin attachment. Well, blow me down! Begad! Since I fiberglassed t' rocket it be necessary t' apply a finish coat t' cover the weave o' t' fabric. Ya scallywag! A top layer o' 'SuperFil' be applied usin' a plastic squeegee. Aye aye! I love this stuff as it is super light and easy t' sand. Blimey! When dried it is rock hard. Ahoy! Since this is a sport rocket thar be no paintin' guide. So I decided t' model mine on a W79 8" Artillery shell (picture included 1 2). Well, blow me down! I had some clear vinyl decals made up and use a military green paint t' give it that 'army ordinance' look. Well, blow me down! Blimey! I have given me rocket t' name o' 'W80 4" Projectile'. Ya scallywag!

Flight:
My rockets all tend t' be on t' heavy side since I always reinforce them. Begad! Ahoy! Blimey! As a result I never look at t' recommended motors list. Avast, me proud beauty! Instead I use RockSim to test for stability and motor selection. T' first and so far only flight be on an I211W-10. Well, blow me down! Blimey! Perfectly straight in a 15mph wind. Aye aye! Blimey! T' predicted height was 2900 feet and I could hardly see it when it deployed t' chute but it looked t' be just after apogee. Ya scallywag! Ya scallywag! Blimey! T' rocket drifted about 3/4" o' a mile and soft landed in a field without a scratch t' show for it. Arrr!

Summary:
PROs: YANK kits are very nice. I like t' flexible phenolic and t' ability to buy without a chute. Ahoy! Fin material is first rate and t' nosecone is one o' the better t' be found. Begad!

CONs: can't think o' any except they could provide a decal or two. Ya scallywag! After all that is what makes BSD rockets so nice.

Other:
Build it like you are flyin' an M and you won't have t' worry about a shred. Next stop--J350W