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. Aye aye! Blimey! When t' rocket exits t' tube, t' springs pop t' fins out, ya bilge rat, shiver me timbers, providin' stabilization.

Picture courtesy o' Aerocon

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

Recovery:
Havin' misplaced t' original parachute, shiver me timbers, I substituted another parachute o' approximately t' same size. Begad! Recovery was perfect, matey, with nary a din' on t' rocket. Ya scallywag! T' aft o' t' rocket, does have some minor black markings, due t' t' rocket exhaust bein' contained by t' tube launcher, matey, 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. Begad! If your local club is a NARRRRR club, and you only have opportunities t' fly under their rules, me bucko, shiver me timbers, me hearties, t' FlippiFin is nay for you. 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, me bucko, but safe, shiver me timbers, shiver me timbers, addition t' a launch. Avast, matey, me proud beauty! 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