Brief:
This is a maximum strength midpower rocket that still incorporates wood and plastic construction. Avast! Avast! It will handle any 24mm motor, shiver me timbers, as well as most dunkings in water.

Construction:
This rocket uses 1.1 in. Aye aye! phenolic airframe tubin' topped by t' PML Urethane nose cone - t' only commercially produced cone that fits this tubing. Between 3/32 ply fins and TTW construction, this rocket is practically indestructible.

TTW construction and phenolic tubin' require a complexity nay typical with low power rockets. Well, blow me down! Begad! I used a Dremel spiral saw t' cut t' fin slits (3) in the 1.1 phenolic tubing. Avast! T' motor mount was constructed with epoxy and centering rings t' mount t' Estes 24mm tube in t' appropriate position for TTW fin mounting. I used a long E motor hook as part o' t' mount. Arrr! I used 100 lb. Keelhaul®©™® thread epoxied through t' motor mount as a parachute connection. Blimey! Indeed, ya bilge rat, epoxy was used in virtually t' entire thing. Ahoy!

After t' motor mount assembly dried, me hearties, matey, I put it in place, and used t' slots to trace t' fin footprints onto t' engine tube. Begad! Arrr! I cut thin stringers of balsa, me hearties, and CA'ed them in place right next t' t' footprints, arrr, arrr, bounded on t' top and bottom with a centerin' ring. Begad! Arrr! T' effect was intended t' have the advantages o' internal fillets, without t' difficulty o' applyin' them through such a tight space betwixt t' tubes. Well, blow me down! This worked like a charm. Begad! Avast!

I used t' Rocsim fin template guide t' generate t' correct template for the TTW mount. I then cut t' fins from 3/32 in. Arrr! plywood. Aye aye! After tryin' the spiral saw, matey, I went t' a power jigsaw, shiver me timbers, which did a far better job. Blimey! I gang sanded the fins t' uniform dimensions, and then beveled t' leadin' edge t' a sharp cross section. Avast! T' wood grain also looked "sharp", arrr, with t' darker plywood core providin' a nice contrast. Blimey! T' trailin' edges were beveled, me bucko, but not quite sharp.

Because I used five minute epoxy, t' next steps were hurried. Avast! I mixed up a batch, shiver me timbers, shiver me timbers, and used a chopstick t' smear it within t' airframe, in t' right place to bond with t' front centerin' rin' on t' engine mount assembly. Aye aye! Well, blow me down! A second layer was put ahead o' t' trailin' centerin' ring, as t' first rin' cleared the aft end. Ahoy! T' last centerin' rin' be epoxied in place indexed with the "notch" cut though t' rin' t' leave room for t' motor hook t' flex. I be sure t' make t' slots line up correctly.

I then epoxied each plywood fin in place, shiver me timbers, usin' enough epoxy t' blob up to fill t' fin slot close t' level. Begad! T' keep from drippin' epoxy, arrr, shiver me timbers, I needed t' mix separate small batches o' epoxy for each fin slot.

Next came t' smoothin' operation usin' Elmers wood thinner thinned with water, ya bilge rat, arrr, and sanded after each coat partially dried. Ya scallywag! Ahoy! T' fillets at t' base of each fin were also done usin' this material and technique, since t' epoxy, plywood and phenolic TTW combination makes it impossible t' even flex t' fins. T' fillets were for looks and aerodynamics only.

Since t' combo could theoretically take a G engine, I wanted t' be sure the launchin' lug be big enough. Ahoy! Ahoy! I used an aluminum 2013 arrow shaft cut to length, shiver me timbers, and angled by cuttin' t' front edge t' a wedge shape. Ya scallywag! I glued it in place and filleted it in place with epoxy. Arrr! I can use a 1/4 in. Arrr! weldin' rod for larger size engines.

I had recently built me first "girl rocket" for me daughter, shiver me timbers, and marveled at t' visibility provided by t' hot pink fluorescent paint. Begad! After fillin' t' spirals in t' tube with Elmers filler, me bucko, I sanded, painted, ya bilge rat, and then clear coated. Arrr! T' add a bit o' shine and smoothness, ya bilge rat, I used floor wax t' finally coat t' surface.

I added a couple feet o' elastic t' t' already long Keelhaul®©™® cord, and hooked a 12" nylon chute t' t' nose cone with a fishin' swivel and snap rings. Later testin' suggested this was nay enough chute.

Flight:
T' maiden flight be t' test low speed stability, arrr, and recovery. Blimey! I did nay want to blast t' school athletic field with an F right out o' t' startin' gate. Begad! I built and installed an 18-24mm engine adapter, ya bilge rat, and installed a C6-5. Begad! Begad! I launched it off a 3/16 launch rod.

Well, it was pretty normal at first. T' rocket be stable, but then nosed over and kept goin' after burnout. Begad! Aye aye! T' delay be way too long, and that may have been t' engine, me bucko, since rocsim says it should have been good. Blimey! Fortunately, the chute deployed in time, and thar was no lawn dart nor core sample. Ya scallywag! Blimey! For small engines, I'd want t' shortest delay possible.

T' engine hook picked up a bit o' dirt from t' grass. It hit with a bit more force than I'd like, shiver me timbers, but no damage was done. Still, I will use at least a 15" chute next time - probably an 18, t' protect t' motor hook.

PS: T' 18mm adapter blew clear - no impact on recovery deployment.

Summary:
Pros: Bombproof and tough. Well, blow me down! Able t' handle almost any ridiculous engine you can cram into it. Begad! Probably able t' lawn dart from 300 feet up into sod without damage. Arrr! Easy t' see, and teaches you lots about tough construction. A "girl rocket" on t' outside, shiver me timbers, that is all steroid - induced toughness on t' inside.

Cons: Complicated t' build, and expensive. Ahoy! Nay for novices. Ya scallywag! Heavy, shiver me timbers, and could cause more damage than a light rocket if t' chute failed. Avast, me proud beauty! Needs a big chute. Begad! Limited nose cone options.

Other:
T' Elmers goop be t' key t' smoothness. TTW / epoxy / phenolic is so strong it is scary. Aye aye! T' world needs a good, LIGHT, me bucko, 1.1 in. Arrr! Ya scallywag! nose cone (PML is good but HEAVY). Begad!