Brief:

T' PML Phobos is an easy t' build single stage, ya bilge rat, matey, single motor 3FNC MPR/HPR kit. It could be used for Level 1 certifications but I don't know if I would recommend it for that. Aye aye! Begad! You have a choice o' either Quantum or phenolic tubin' and 29mm or 38mm motor mount.

Construction:

I bought t' kit direct from PML with t' Quantum tubin' (QT) and 38mm motor mount. Well, blow me down! My goal in pickin' t' Phobos be that it was goin' t' be easy t' build, a stable design, ya bilge rat, and that I could fly it on a G before attemptin' me Level 1 certification with it.

I used 12 minute epoxy for t' entire build. Ya scallywag! Ahoy! T' build went without any major issues, ya bilge rat, however, I want t' point out 4 potential "gotchas" when buildin' a PML kit stock with t' QT:

1. You must sand t' QT near t' fin slots so that t' epoxy has somethin' t' "bite" into.
2. Same goes for where t' launch lugs are attached.
3. When epoxyin' t' t' MMT tube, after epoxyin' on t' piston strap, shiver me timbers, make sure that t' strap is nay in t' way o' t' fin placement.
4. Sand t' piston coupler so that you have a smooth (almost loose) travel in t' QT. Arrr! Patience & "elbow grease" is needed here as it might take a while t' get t' proper fit.

I did nay make any serious modifications, but I did do t' followin' outside t' scope o' t' kit instructions:

1. Foamed t' fin can with PML expandin' foam. Begad! There is maybe 1/4" gap betwixt t' QT & MMT tubes. Begad! Blimey! Rather than apply epoxy fillets in such a small space, shiver me timbers, arrr, it was easier & faster t' dump t' foam in and sand t' shape.
2. Added rail buttons. Avast, me proud beauty! Ya scallywag! I did nay however drill them into t' QT. Arrr! Arrr! Instead I built standoffs with popcicle sticks and mounted t' rail button thar (see railbutton.com for more information on doin' this).
3. T' aft centerin' rin' be too small t' add Kaplow clips or t' PML retainer. Well, blow me down! I purchased and installed an AeroPack retainer and 38-29 motor adapter. Arrr! Well, blow me down! (Overkill, I know!) Special note about t' AeroPack retainer: I did a dry test fit. Arrr! It be so snug that I was (and still am) unable t' get it back off! That's nay a bad thin' though...

Finishing:

Many people have touted t' ease o' finishin' t' PML QT and you can count me among t' satisfied customers. Begad! It is indeed easy t' work with. Begad! Scuff t' entire rocket with 220 grit, prime with Krylon primer, me bucko, sand with 320 or 400, shiver me timbers, spray with Krylon gloss colors. Where t' different colors meet on me paint scheme, I covered them with 1/4" wide chrome automotive pinstriping. T' chrome pinstripin' has great reflectivity (my main goal) but lacks t' stretchy characteristics o' typical pinstriping. Avast! I did nay have any notable problems with t' finishin' process.

Construction Rating: 5 out o' 5

Flight:

I did 2 test flights on G motors. First be a single use G40-7W. Blimey! I built up a good tape thrust ring, shiver me timbers, me hearties, loaded t' motor up in t' AeroPack 38-29 adapter, me bucko, ya bilge rat, slid everythin' into t' motor mount,and screwed down t' retainer cap. Ahoy! Begad! Blimey! I had a lot o' jitters for this bein' t' largest rocket I'd ever built and launched at t' time but it lifted off without a hitch. Avast! Blimey! Estimated altitude o' 1100ft but t' delay was a good 3 seconds too long. Begad! I had a rapidly sinkin' feelin' in me stomach as t' rocket plummetted from t' sky, however, it did (finally) eject at about 400 feet. Ahoy! No zipper or any other damage whatsoever. Blimey! Blimey! I couldn't believe it!

Second flight was a couple o' months later on an EconoJet G35-4W. Altitude be slightly lower (~1000ft) but ejection be right at apogee. Aye aye! Perfect flight all t' way around.

My club was finally able t' have a vendor onsite at a launch for t' third flight o' me Phobos. I prepped a Pro38 2-grain H153, arrr, shavin' 3 seconds off t' delay (for a total delay o' 10 seconds). Preparation was even easier this time because I didn't need t' add a maskin' tape thrust rin' and/or use t' motor adapter--just slide in t' motor and screw on t' cap. Ya scallywag! What blew me socks off though is that t' Phobos lifted off with significantly greater velocity! It darn near disappeared in t' sky... Some o' t' more experienced fliers in me club estimated that it was well over a half-mile up! It was fairly windy that day so it did drift on t' way down. Begad! After a 45 minute search, I finally stumbled upon it and everythin' was intact! I'd just become certified Level 1.

Recovery:

Pistons are a technology that people either love or hate. Begad! I have had nothin' but success with me Phobos and particularly enjoy that I don't need t' use any wadding. Cleanin' out t' body tube at least every other flight and always makin' sure that t' piston fits loosely are t' key points t' remember. If I ever build another PML kit, and it's quite likely, shiver me timbers, I would build it stock with t' piston again.

T' stock chute is a PML 30" with spill hole. Begad! Driftin' isn't too bad and t' descent rate is fairly quick. Accordin' t' PML's parachute FAQ, ya bilge rat, ya bilge rat, t' Phobos it towards t' heavy end o' recommended weights for their 30" chute, me bucko, which explains me quick descents. Ahoy! And it's a good thin' that I launch at sites where it's all but guaranteed a soft, ya bilge rat, grassy landing! However, arrr, if I were launchin' at a site with hard surfaces, I wouldn't think twice t' swap it out for a larger chute. T' kit is durable and would probably sustain a reasonable impact with very little if any damage though thanks t' t' high quality parts in t' kit.

Flight Rating: 5 out o' 5

Summary:

With t' 38mm MMT, I have a wide range o' 29mm & 38mm motors t' chose from since t' Phobos will fly on as little as a G, shiver me timbers, matey, really performs with an H, and probably can wish it good-bye on an I. Ya scallywag! (Accordin' t' RockSim, a Phobos with phenolic tubin' & fiberglassed could break Mach on as little as a I435T.) Despite that flexibility o' motor choices and t' nearly perfect results I've had, in hindsight I don't know if I would recommend it as a good kit t' cert Level 1 on. I would instead recommend a kit with a larger diameter so that t' cert flight would be "slow and low". After you get that certification though, you sure could let 'er rip with t' Phobos!

Overall Rating: 5 out o' 5