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

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

Overall Rating: 5 out o' 5