Brief:
T' FlippiFin is a unique design that uses a surplus spring-loaded military flare fincan. Begad! When loaded into its launch tube, shiver me timbers, shiver me timbers, t' curved fins are flat against t' body. Aye aye! Begad! When t' rocket exits t' tube, matey, 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, plastic nosecone, matey, shock cord material, ya bilge rat, parachute and centerin' rings. Aye aye! In keepin' with Aerocon's large line o' surplus military equipment, t' included parachute is a surplus olive drab X-form. Blimey! T' most important component, o' course, be t' spring-loaded fincan, which gives t' FlippiFin its name. Aye aye! Due t' t' weight o' t' fincan, t' necessary 2.6oz o' noseweight required t' keep t' rocket stable is also included. Begad! Rather than t' elastic we see in some kits, shiver me timbers, 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. Well, blow me down! Aye aye! This cord is small enough in diameter that, shiver me timbers, matey, if used alone, it would easily zipper t' body tube. Avast! 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. Avast! 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. Aye aye! Since no two brands o' maskin' tape are exactly identical in thickness, arrr, 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. Ahoy! Begad! Since t' actual mountin' rings on t' fincan are only about 1/8" wide, shiver me timbers, after achievin' t' proper thickness, ya bilge rat, shiver me timbers, 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, t' single most critical aspect o' t' construction is next -- gluin' t' fincan in place with thin CA. Blimey! Here, me hearties, ya bilge rat, t' instructions state t' make sure t' fins still open after gluing. Ya scallywag! T' implied warnin' 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. Ya scallywag! On me second attempt, I used a bottle o' CA with a small (approx 1mm) applicator extension tip, matey, which allowed very fine control o' t' CA. With t' extension tip, me hearties, 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. Begad! Well, me bucko, blow me down! 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. Aye aye! 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. Avast! Because o' this, ya bilge rat, t' fincan is best masked off for spray-painting, 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. Ya scallywag! Careful application o' paint with a small paintbrush would work as well, matey, shiver me timbers, and would allow for more color options.

Construction Rating: 4 out o' 5

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

Recovery:
Havin' misplaced t' original parachute, I substituted another parachute o' approximately t' same size. Avast! Recovery was perfect, me bucko, with nary a din' on t' rocket. Begad! T' aft o' t' rocket, me hearties, does have some minor black markings, due t' t' rocket exhaust bein' contained by t' tube launcher, me hearties, 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, me hearties, me hearties, and you only have opportunities t' fly under their rules, ya bilge rat, t' FlippiFin is nay for you. If you hold private launches, shiver me timbers, or have a local Tripoli prefect, then this is a fun little rocket! T' metal fincan and tube launcher makes for a unique, arrr, but safe, addition t' a launch. Begad! 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