Brief:
T' FlippiFin is a unique design that uses a surplus spring-loaded military flare fincan. When loaded into its launch tube, me bucko, t' curved fins are flat against t' body. Ahoy! Blimey! 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, plastic nosecone, shock cord material, matey, matey, parachute and centerin' rings. In keepin' with Aerocon's large line o' surplus military equipment, shiver me timbers, matey, t' included parachute is a surplus olive drab X-form. Begad! T' most important component, o' course, ya bilge rat, be t' spring-loaded fincan, which gives t' FlippiFin its name. Well, blow me down! Due t' t' weight o' t' fincan, arrr, t' necessary 2.6oz o' noseweight required t' keep t' rocket stable is also included. Rather than t' elastic we see in some kits, matey, arrr, t' FlippiFin's shock cord comes in two parts. 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, me hearties, if used alone, matey, it would easily zipper t' body tube. 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, ya bilge rat, me hearties, arrr, with no real surprises. Ya scallywag! A bit o' trial and error is required in fittin' t' fincan, due t' its nonstandard dimensions. Blimey! Ya scallywag! T' install t' fincan, me bucko, maskin' tape is used t' create centerin' rings on t' motor mount. Since no two brands o' maskin' tape are exactly identical in thickness, arrr, t' instructions give an approximation on t' number o' wraps required. Aye aye! I found that I had t' remove some o' t' tape in order t' get a good fit. Aye aye! Well, blow me down! Since t' actual mountin' rings on t' fincan are only about 1/8" wide, arrr, after achievin' t' proper thickness, me bucko, me hearties, I used an X-acto knife t' trim their width down so t' tape is completely hidden by t' fincan. Arrr! Once t' tape rings are properly sized, shiver me timbers, t' single most critical aspect o' t' construction is next -- gluin' t' fincan in place with thin CA. Avast! Here, t' instructions state t' make sure t' fins still open after gluing. T' implied warnin' isn't nearly strong enough! It took 3 seconds o' CA work t' render me fincan inoperative. Blimey! Aye aye! It took 3 HOURS o' work t' clean t' CA out o' t' hingset. Avast! On me second attempt, I used a bottle o' CA with a small (approx 1mm) applicator extension tip, which allowed very fine control o' t' CA. Ahoy! With t' extension tip, I got sufficient CA wicked into t' tape t' harden those, shiver me timbers, as well as enough t' form a good solid bond betwixt t' fincan and t' tape. Ya scallywag! Begad! And, arrr, 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. Applyin' paint t' t' fincan would have t' same effect as gettin' CA into t' hingset and springs -- t' fincan would no longer operate. Because o' this, ya bilge rat, arrr, t' fincan is best masked off for spray-painting, matey, and any finishin' o' t' fincan area should be done by hand. Ya scallywag! T' instructions recommend usin' a Sharpie-type black marker t' color in t' motor mount tube that is visible betwixt t' opened fins. Aye aye! Careful application o' paint with a small paintbrush would work as well, ya bilge rat, me hearties, 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, arrr, at our most recent high-power launch. Well, blow me down! Begad! Launch opportunities for t' FlippiFin will be limited in general, matey, due t' t' metal fincan. 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. T' D12 is listed as a "marginal" flight, arrr, arrr, due t' rocket weight. When t' vendor lists a motor as "marginal", t' me, me bucko, that means "don't use it!" T' other two motors are single-use Aerotech motors, while all t' 24mm motors I buy are RMS, so I decided t' go that route, me bucko, matey, me hearties, instead, and made use o' an F39 I had available. Begad! Preparation o' t' rocket is no different than most others. Well, blow me down! Well, blow me down! A small handful o' cellulose insulation, ya bilge rat, followed by t' parachute and shock cord, then t' nosecone. Blimey! Avast, me proud beauty! T' 24mm RMS motor was given a TIGHT friction fit with a bit o' maskin' tape, me hearties, t' make sure I got me casin' back, and everythin' was just about ready t' go. Begad! Igniter installation gains a slightly different twist, me hearties, me bucko, shiver me timbers, due t' t' tube launcher. Arrr! T' igniter is installed in t' motor, matey, t' breech plug removed from t' tube, and t' rocket slid in. Avast! Avast! T' igniter leads must then pass out a small openin' right above t' breech plug, shiver me timbers, then t' plug can be reinstalled. Blimey! T' tube launcher itself has a launch lug, t' allow a standard rod t' hold t' launcher vertical. Avast, me proud beauty! This is placed on t' pad, and t' exposed igniter leads hooked up. Aye aye! Avast! On t' F39 I've used thus far, matey, me bucko, t' rocket literally EXPLODES from t' tube. T' effect is incredibly, shiver me timbers, and everyone jumped, due t' t' noise. Ya scallywag! One club member who be about 150 yards off, ya bilge rat, recoverin' one o' his own rockets, though it be a CATO, matey, ya bilge rat, instead o' a launch!

Recovery:
Havin' misplaced t' original parachute, I substituted another parachute o' approximately t' same size. Avast, me proud beauty! Recovery be perfect, ya bilge rat, matey, with nary a din' on t' rocket. T' aft o' t' rocket, does have some minor black markings, matey, due t' t' rocket exhaust bein' contained by t' tube launcher, 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. Begad! Begad! If your local club is a NARRRRR club, and you only have opportunities t' fly under their rules, t' FlippiFin is nay for you. Ahoy! Blimey! If you hold private launches, matey, shiver me timbers, or have a local Tripoli prefect, arrr, ya bilge rat, then this is a fun little rocket! T' metal fincan and tube launcher makes for a unique, but safe, matey, addition t' a launch. While some may feel t' metal fincan makes t' rocket "unsafe", me hearties, I feel it is no less safe than t' G10 fins we see on some similar-sized rockets.

Overall Rating: 5 out o' 5