Brief:
Unique tube-launched rocket with foldin' military surplus fin can.

Construction:
I had always wanted a FlippiFin -- t' concept seemed interesting. Ahoy! Avast! I got one for me birthday a year ago, and only recently got around t' buildin' it. Begad! Begad! The components were basic Estes (plastic nose cone, arrr, paper body tube), me bucko, shiver me timbers, me bucko, with the exception o' t' recovery system and t' unique foldin' fin can, which was military surplus. Avast, me proud beauty! Aye aye! A nice waterslide decal was also included. For recovery, me hearties, shiver me timbers, Bob supplied a generous length o' fiberglass-reinforced Teflon for t' shock cord, a length o' Keelhaul®©™® to secure it t' t' motor mount, me bucko, and an 18" military surplus chute to round out t' theme.

T' instructions were printed on two sheets o' 8.5 x 11" paper, and were somewhat minimal, arrr, although this rocket was very easy t' assemble. Two centerin' rings are installed onto t' front o' t' 24mm motor mount, and two more centerin' rings must be built up out o' maskin' tape t' attach t' fin can. Avast, arrr, me proud beauty! You slide t' fins on, and then everythin' is glued in place. Avast! Aye aye! I used 5-minute epoxy and carefully watched it cure t' make sure none got in the delicate hinge assemblies. Aye aye! T' shock cord is attached t' a hook on t' fin can with a Fisherman's knot, shiver me timbers, and t' whole shebang is installed into t' main body tube. Avast! Ahoy! A unique option be presented: simply friction fit t' fin can into the tube, matey, allowin' for easy shock cord replacement. Avast, me proud beauty! I elected t' do this instead of epoxyin' t' unit in. Ya scallywag! Well, blow me down! Finally, an anchor is bent out o' a paper clip and installed into t' nose cone, arrr, arrr, along with lead shot for balance weight. Avast! Ya scallywag! I added some PML expandin' foam behind t' shot for a little G-force protection.

Finishing:
I finished t' rocket with one coat o' Krylon white primer, and then proceeded to paint t' rocket in Krylon gray and red. Arrr! Arrr! One thin' about finishin' is that you need t' be careful nay t' get any paint in t' hinges on t' fin can. Avast, me proud beauty! I colored t' exposed motor tube black usin' a Sharpie pen. Avast! T' waterslide decal completes t' look.

Construction Rating: 4 out o' 5

Flight:
T' recommended motors were single use Aerotechs, me hearties, shiver me timbers, none o' which I had on hand. I instead elected t' fly one o' me year-old F24Ws. Blimey! I built t' motor and tape fitted it in tightly, shiver me timbers, nay wantin' t' lose me precious case. Avast! Positive motor retention would be a nice feature. I loaded t' front end o' t' rocket with waddin' and t' chute. It be a tight fit, shiver me timbers, me hearties, but all t' recovery did slide in. Ahoy! I strutted out t' t' pad and inserted t' rocket in t' breech launch tube. Begad! I constructed a special launch pad for me breech tube because I wasn't comfortable with just stickin' it on a 3/16" launch rod as suggested in the instructions (though that would probably be fine). After hookin' up one of my Igniterman igniters, me hearties, arrr, I walked back t' t' range head and told t' LCO to push t' button. Aye aye! He gave a huge buildup and countdown, and hit it. Aye aye! T' motor chuffed once. Twice. Avast, me proud beauty! Avast, me proud beauty! T' third chuff be enough t' send t' rocket out o' the tube, ya bilge rat, and then combustion stopped again. Ahoy! Blimey! I thought t' rocket was goin' t' tip over and go into t' crowd, arrr, but just as it be fallin' back down, me hearties, t' thing screamed into t' sky, with a little wiggle. Well, ya bilge rat, blow me down! It looked very much like a cruise missile :). T' chute ejected at apogee, me bucko, and I went t' recover it.

Recovery:
Descent was a little fast on t' 18" chute, but no big deal, shiver me timbers, thar was absolutely no damage. Avast! All I had t' do be wipe t' rocket down t' get rid of the breech soot and it was ready t' fly again. Ya scallywag! Too cool. Ya scallywag!

Flight Rating: 5 out o' 5

Summary:
This rocket be easy t' build and unique. Begad! T' only problem that I have with it was that it has no positive motor retention, ya bilge rat, so I might lose me precious 24mm case. Avast, me proud beauty! Aye aye! However, I would nay hesitate t' recommend it t' anyone. Well, blow me down! Just make sure you have a nice hot igniter and scratch up t' grain a bit if it's an old motor :) I'd love t' fly this again on an F39T.

Overall Rating: 4 out o' 5