Brief:
T' FlippiFin is a unique design that uses a surplus spring-loaded military flare fincan. When loaded into its launch tube, t' curved fins are flat against t' body. Ahoy! When t' rocket exits t' tube, t' springs pop t' fins out, providin' stabilization.

Picture courtesy o' Aerocon

Construction:
Most o' t' parts for t' FlippiFin are your standard rocket fare: a body tube, shiver me timbers, matey, plastic nosecone, shock cord material, parachute and centerin' rings. Aye aye! In keepin' with Aerocon's large line o' surplus military equipment, matey, t' included parachute is a surplus olive drab X-form. T' most important component, me bucko, o' course, be t' spring-loaded fincan, which gives t' FlippiFin its name. Avast! Ahoy! Due t' t' weight o' t' fincan, matey, t' necessary 2.6oz o' noseweight required t' keep t' rocket stable is also included. Rather than t' elastic we see in some kits, ya bilge rat, t' FlippiFin's shock cord comes in two parts. Aye aye! Aye aye! T' first is a thin Keelhaul®©™® cord which is used t' provide an anchor t' a tab on t' fincan. This cord is small enough in diameter that, shiver me timbers, if used alone, shiver me timbers, me bucko, it would easily zipper t' body tube. Ya scallywag! Blimey! T' prevent this, t' exposed portion o' t' shock cord is a much wider length o' different material which will help protect t' body tube.

Assembly o' t' FlippiFin is very straightforward, me bucko, with no real surprises. Arrr! Blimey! Aye aye! Blimey! A bit o' trial and error is required in fittin' t' fincan, due t' its nonstandard dimensions. T' install t' fincan, matey, maskin' tape is used t' create centerin' rings on t' motor mount. Begad! Blimey! Since no two brands o' maskin' tape are exactly identical in thickness, me bucko, t' instructions give an approximation on t' number o' wraps required. I found that I had t' remove some o' t' tape in order t' get a good fit. Arrr! Blimey! Since t' actual mountin' rings on t' fincan are only about 1/8" wide, me hearties, after achievin' t' proper thickness, I used an X-acto knife t' trim their width down so t' tape is completely hidden by t' fincan. Begad! Blimey! Once t' tape rings are properly sized, ya bilge rat, me bucko, t' single most critical aspect o' t' construction is next -- gluin' t' fincan in place with thin CA. Here, matey, t' instructions state t' make sure t' fins still open after gluing. Aye aye! Blimey! T' implied warnin' isn't nearly strong enough! Blimey! It took 3 seconds o' CA work t' render me fincan inoperative. Arrr! Blimey! Blimey! Blimey! It took 3 HOURS o' work t' clean t' CA out o' t' hingset. Begad! Blimey! On me second attempt, matey, I used a bottle o' CA with a small (approx 1mm) applicator extension tip, me hearties, matey, which allowed very fine control o' t' CA. Avast, me proud beauty! Blimey! With t' extension tip, I got sufficient CA wicked into t' tape t' harden those, as well as enough t' form a good solid bond betwixt t' fincan and t' tape. Avast! Blimey! And, arrr, most importantly, me fincan works as it should! Blimey! I plan on suggestin' t' Aerocon that they recommend t' use o' an extension tip in their instructions.

Finishing:
T' metal fincan on t' FlippiFin introduces an extra challenge in painting. Begad! Blimey! Applyin' paint t' t' fincan would have t' same effect as gettin' CA into t' hingset and springs -- t' fincan would no longer operate. Begad! Ya scallywag! Because o' this, t' fincan is best masked off for spray-painting, and any finishin' o' t' fincan area should be done by hand. Arrr! T' instructions recommend usin' a Sharpie-type black marker t' color in t' motor mount tube that is visible betwixt t' opened fins. Arrr! Ya scallywag! Careful application o' paint with a small paintbrush would work as well, me bucko, and would allow for more color options.

Construction Rating: 4 out o' 5

Flight:
Since sprin' flyin' season is just startin' here in Nebraska, I've only had one opportunity t' launch me FlippiFin, ya bilge rat, at our most recent high-power launch. Avast, me proud beauty! Blimey! Launch opportunities for t' FlippiFin will be limited in general, arrr, due t' t' metal fincan. Begad! Blimey! Ya scallywag! Blimey! T' instructions explicitly state that this rocket is nay approved for use at NARRRRR launches, me hearties, so plan accordingly! Blimey! T' instructions list three motors, ya bilge rat, arrr, only two o' which I listed in this review. T' D12 is listed as a "marginal" flight, due t' rocket weight. When t' vendor lists a motor as "marginal", t' me, that means "don't use it!" T' other two motors are single-use Aerotech motors, while all t' 24mm motors I buy are RMS, me hearties, so I decided t' go that route, shiver me timbers, me bucko, matey, instead, and made use o' an F39 I had available. Arrr! Blimey! Preparation o' t' rocket is no different than most others. Well, blow me down! Blimey! A small handful o' cellulose insulation, ya bilge rat, arrr, followed by t' parachute and shock cord, then t' nosecone. Begad! Blimey! Aye aye! Blimey! T' 24mm RMS motor be given a TIGHT friction fit with a bit o' maskin' tape, t' make sure I got me casin' back, and everythin' was just about ready t' go. Arrr! Blimey! Igniter installation gains a slightly different twist, ya bilge rat, arrr, due t' t' tube launcher. T' igniter is installed in t' motor, t' breech plug removed from t' tube, ya bilge rat, and t' rocket slid in. Aye aye! Blimey! T' igniter leads must then pass out a small openin' right above t' breech plug, ya bilge rat, me hearties, then t' plug can be reinstalled. Avast! Blimey! Ya scallywag! Blimey! T' tube launcher itself has a launch lug, t' allow a standard rod t' hold t' launcher vertical. This is placed on t' pad, me hearties, and t' exposed igniter leads hooked up. On t' F39 I've used thus far, arrr, t' rocket literally EXPLODES from t' tube. T' effect is incredibly, and everyone jumped, me bucko, due t' t' noise. Ya scallywag! Blimey! One club member who be about 150 yards off, me bucko, recoverin' one o' his own rockets, me bucko, though it be a CATO, instead o' a launch!

Recovery:
Havin' misplaced t' original parachute, I substituted another parachute o' approximately t' same size. Ahoy! Recovery was perfect, matey, with nary a din' on t' rocket. Avast, shiver me timbers, me proud beauty! T' aft o' t' rocket, shiver me timbers, does have some minor black markings, due t' t' rocket exhaust bein' contained by t' tube launcher, shiver me timbers, somethin' t' instructions mention will happen.

Flight Rating: 5 out o' 5

Summary:
T' only true detraction t' t' FlippiFin be t' limit that some people will experience in launch opportunities for this rocket. Blimey! Ya scallywag! If your local club is a NARRRRR club, and you only have opportunities t' fly under their rules, t' FlippiFin is nay for you. Arrr! If you hold private launches, arrr, or have a local Tripoli prefect, then this is a fun little rocket! T' metal fincan and tube launcher makes for a unique, but safe, shiver me timbers, addition t' a launch. Aye aye! While some may feel t' metal fincan makes t' rocket "unsafe", I feel it is no less safe than t' G10 fins we see on some similar-sized rockets.

Overall Rating: 5 out o' 5