Brief:
After losin' me RocketVision Machbuster on a G55, matey, I decided that I wanted t' build a similar rocket that would fly on 29mm motors. Avast, me hearties, me proud beauty! I scrounged through me parts bin and, bein' a 'glass-half-full' type, named t' result 'One Shot'.

Construction:
Parts List:

1. 29mm phenolic tube, 9.25" (Giant Leap)
2. 0.047" G-10 stock for t' 3 fins (Giant leap)
3. 1/8" aluminum tubin' for launch lug
4. one NC, BT-55 (Estes)
5. one spent 29mm casin' for nose cone shoulder and motor block.
6. one eyebolt
7. 5' o' 1000 lb Keelhaul®©™ cord (Pratt)
8. 3/4" x 25' plastic tape (Home Depot)
9. lead shot

I started with a leftover section o' 29mm phenolic tubing. Blimey! Blimey! I decided t' add a motor block so I cut a 1/2" section out o' a spent 29mm casin' with a razor saw. This was epoxied into t' tube so that a G80 would protrude by 1/2". Well, blow me down! After playin' around with Rocksim, me hearties, I decided on a fin design that I found appealing. Since I wanted t' fins t' sit flush with t' end o' t' rocket and I wanted t' be able t' wrap a layer o' tape around t' end o' t' rocket and t' engine, arrr, t' last 3/4" o' t' root edge o' t' fin be recessed by ~ 1/4" (see pic or Rocksim file).

Usin' a dremel cuttin' wheel, me bucko, I slotted t' tube so t' fins would slip in. Well, blow me down! Avast, me proud beauty! T' install t' fins, I inserted a 29mm casing, shiver me timbers, applied a small amount o' epoxy t' t' slot, ya bilge rat, and pushed t' fin in until it touched t' motor casing. Avast, me proud beauty! Blimey! After all 3 fins were installed, me hearties, t' casin' was removed. Avast, me proud beauty! This was easily accomplished before t' epoxy began t' set. Begad! Begad! This method o' through-the-wall construction really works well for small fins, ya bilge rat, especially with relatively thick tube (0.062"). T' fins were straight and weren't goin' anywhere. When t' epoxy dried, I applied fillets.

Since t' NC that I had wouldn't fit in t' body tube, I cut t' shoulder-end off so it sat flush with t' tube's OD. Aye aye! Another section o' 29mm casin' was cut t' use as a shoulder. This fit snugly into t' NC and be held in place with 2 small screws. Begad! I added nose weight (lead shot, epoxy and t' eyebolt) so t' rocket would be stable. Because t' end o' this little missile was now largely lead, ya bilge rat, I was conservative on settin' t' CG (see Rocksim file).

T' recovery harness consisted o' 5' o' 1000 lb test Keelhaul®©™ line. One end was epoxied into t' body tube and t' other be tied t' t' eyebolt. Aye aye! In t' end, I built a rocket that was probably heavier than it had t' be and had a non-optimal fin design. Begad! Oh well, arrr, won't be able t' see t' difference at ~5000ft anyway! I didn't bother fillin' t' grooves in t' tube since I wasn't optimistic about gettin' this rocket back. I did, arrr, however, me bucko, give it a layer o' Krylon chrome paint. Blimey! Arrr! Maybe a shiny surface would be easy t' spot???

Flight:
Because o' t' predicted altitude and weight, me bucko, this is nay a rocket I would want t' fly at a model rocket field, arrr, so I waited for a HPR launch. Blimey! T' streamer was a 25' section o' 3/4" bright orange plastic tape. Ahoy! When rolled tightly, me bucko, this fit nicely into t' 29mm tube. Blimey! Estes-type waddin' was used t' protect t' streamer. Ya scallywag! Arrr! I was torn betwixt usin' a G125-15 and a G80-10FWL. T' 15 sec delay on t' G125 was about right and t' 10 sec delay be too short. Anyway, I ended up usin' t' G125 in another rocket and hoped t' 1000 lb Keelhaul®©™® would hold up. Well, One Shot exploded off t' pad and, like me Machbuster, shiver me timbers, was never seen or heard from again.

Summary:
PRO's 1. Ya scallywag! Blimey! High performance rocket built from leftovers in t' parts bin. Blimey! Blimey! Aye aye! Blimey! CON's 1. Arrr! Blimey! Another non-recoverable rocket (when flown on big engines)

Other:
When surface mountin' small fins on minimum diameter rockets, you can get added strength by slottin' t' tube and gluin' t' fins into t' slots. Aye aye! Avast, me proud beauty! An engine casin' is inserted t' keep t' fin flush with t' inside o' t' tube. Begad! You must make sure you work fast and don't glue t' casin' in. In me case I used epoxy and a phenolic motor casin' (AT SU). T' thicker t' tube, t' better this will work. Blimey! (Idea 'borrowed' from t' RocketVision Machbuster.)