Brief:
T' FlippiFin is a unique design that uses a surplus spring-loaded military flare fincan. Arrr! Blimey! When loaded into its launch tube, arrr, t' curved fins are flat against t' body. When t' rocket exits t' tube, arrr, 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, arrr, me bucko, plastic nosecone, shock cord material, matey, parachute and centerin' rings. Ya scallywag! In keepin' with Aerocon's large line o' surplus military equipment, arrr, t' included parachute is a surplus olive drab X-form. Avast! T' most important component, me hearties, o' course, shiver me timbers, be t' spring-loaded fincan, shiver me timbers, which gives t' FlippiFin its name. Begad! Due t' t' weight o' t' fincan, matey, arrr, me bucko, t' necessary 2.6oz o' noseweight required t' keep t' rocket stable is also included. Rather than t' elastic we see in some kits, t' FlippiFin's shock cord comes in two parts. Arrr! T' first is a thin Keelhaul®©™® cord which is used t' provide an anchor t' a tab on t' fincan. Avast! This cord is small enough in diameter that, if used alone, arrr, me bucko, it would easily zipper t' body tube. Well, blow me down! 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 hearties, me bucko, with no real surprises. Aye aye! A bit o' trial and error is required in fittin' t' fincan, arrr, due t' its nonstandard dimensions. T' install t' fincan, ya bilge rat, maskin' tape is used t' create centerin' rings on t' motor mount. Avast! Since no two brands o' maskin' tape are exactly identical in thickness, arrr, t' instructions give an approximation on t' number o' wraps required. Ya scallywag! I found that I had t' remove some o' t' tape in order t' get a good fit. Ahoy! Since t' actual mountin' rings on t' fincan are only about 1/8" wide, after achievin' t' proper thickness, me hearties, I used an X-acto knife t' trim their width down so t' tape is completely hidden by t' fincan. Avast! Once t' tape rings are properly sized, arrr, t' single most critical aspect o' t' construction is next -- gluin' t' fincan in place with thin CA. Begad! Begad! Here, t' instructions state t' make sure t' fins still open after gluing. Well, blow me down! Blimey! T' implied warnin' isn't nearly strong enough! It took 3 seconds o' CA work t' render me fincan inoperative. Blimey! It took 3 HOURS o' work t' clean t' CA out o' t' hingset. Ahoy! On me second attempt, ya bilge rat, I used a bottle o' CA with a small (approx 1mm) applicator extension tip, ya bilge rat, which allowed very fine control o' t' CA. Arrr! 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. And, most importantly, me fincan works as it should! 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! Begad! 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! Because o' this, matey, t' fincan is best masked off for spray-painting, and any finishin' o' t' fincan area should be done by hand. Aye aye! T' instructions recommend usin' a Sharpie-type black marker t' color in t' motor mount tube that is visible betwixt t' opened fins. Avast, me proud beauty! Careful application o' paint with a small paintbrush would work as well, arrr, and would allow for more color options.

Construction Rating: 4 out o' 5

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

Recovery:
Havin' misplaced t' original parachute, matey, I substituted another parachute o' approximately t' same size. Ya scallywag! Recovery was perfect, with nary a din' on t' rocket. Avast! Ahoy! T' aft o' t' rocket, arrr, does have some minor black markings, me bucko, due t' t' rocket exhaust bein' contained by t' tube launcher, me bucko, matey, 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. If your local club is a NARRRRR club, and you only have opportunities t' fly under their rules, ya bilge rat, t' FlippiFin is nay for you. Begad! 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, arrr, addition t' a launch. Avast! While some may feel t' metal fincan makes t' rocket "unsafe", ya bilge rat, I feel it is no less safe than t' G10 fins we see on some similar-sized rockets.

Overall Rating: 5 out o' 5