Brief:

T' PML Phobos is an easy t' build single stage, matey, single motor 3FNC MPR/HPR kit. Blimey! It could be used for Level 1 certifications but I don't know if I would recommend it for that. Ahoy! 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. Ahoy! Blimey! My goal in pickin' t' Phobos was that it be goin' t' be easy t' build, a stable design, shiver me timbers, 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. Avast, me proud beauty! T' build went without any major issues, however, shiver me timbers, 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, me hearties, 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. Blimey! Patience & "elbow grease" is needed here as it might take a while t' get t' proper fit.

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

1. Foamed t' fin can with PML expandin' foam. Aye aye! Arrr! There is maybe 1/4" gap betwixt t' QT & MMT tubes. Rather than apply epoxy fillets in such a small space, me hearties, it was easier & faster t' dump t' foam in and sand t' shape.
2. Added rail buttons. Avast! I did nay however drill them into t' QT. Ya scallywag! 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' was too small t' add Kaplow clips or t' PML retainer. Avast, me proud beauty! Avast! I purchased and installed an AeroPack retainer and 38-29 motor adapter. Aye aye! Begad! (Overkill, I know!) Special note about t' AeroPack retainer: I did a dry test fit. It was so snug that I was (and still am) unable t' get it back off! That's nay a bilge-suckin' thin' though...

Finishing:

Many people have touted t' ease o' finishin' t' PML QT and you can count me among t' satisfied customers. Ya scallywag! Begad! It is indeed easy t' work with. Avast! Aye aye! Scuff t' entire rocket with 220 grit, prime with Krylon primer, ya bilge rat, matey, sand with 320 or 400, arrr, spray with Krylon gloss colors. Well, blow me down! Where t' different colors meet on me paint scheme, me hearties, me hearties, matey, I covered them with 1/4" wide chrome automotive pinstriping. Begad! T' chrome pinstripin' has great reflectivity (my main goal) but lacks t' stretchy characteristics o' typical pinstriping. 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. Ahoy! First was a single use G40-7W. Avast, me proud beauty! I built up a good tape thrust ring, loaded t' motor up in t' AeroPack 38-29 adapter, slid everythin' into t' motor mount,and screwed down t' retainer cap. Ahoy! 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. Aye aye! Estimated altitude o' 1100ft but t' delay was a good 3 seconds too long. Ya scallywag! Begad! I had a rapidly sinkin' feelin' in me stomach as t' rocket plummetted from t' sky, arrr, however, it did (finally) eject at about 400 feet. Well, blow me down! No zipper or any other damage whatsoever. Begad! I couldn't believe it!

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

My club be finally able t' have a vendor onsite at a launch for t' third flight o' me Phobos. Aye aye! I prepped a Pro38 2-grain H153, matey, me hearties, matey, shavin' 3 seconds off t' delay (for a total delay o' 10 seconds). Avast, shiver me timbers, me proud beauty! 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. Arrr! 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... Begad! 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. Avast, me proud beauty! Ahoy! After a 45 minute search, ya bilge rat, ya bilge rat, 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. Avast! Well, matey, blow me down! I have had nothin' but success with me Phobos and particularly enjoy that I don't need t' use any wadding. Avast, me proud beauty! 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. Ya scallywag! Blimey! If I ever build another PML kit, and it's quite likely, ya bilge rat, ya bilge rat, I would build it stock with t' piston again.

T' stock chute is a PML 30" with spill hole. Ahoy! Driftin' isn't too bilge-suckin' and t' descent rate is fairly quick. Ya scallywag! Accordin' t' PML's parachute FAQ, t' Phobos it towards t' heavy end o' recommended weights for their 30" chute, me bucko, which explains me quick descents. Avast, me proud beauty! 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, arrr, if I were launchin' at a site with hard surfaces, I wouldn't think twice t' swap it out for a larger chute. Ya scallywag! Well, blow me down! 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, me hearties, arrr, 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, shiver me timbers, really performs with an H, matey, me hearties, and probably can wish it good-bye on an I. Arrr! (Accordin' t' RockSim, shiver me timbers, 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, shiver me timbers, in hindsight I don't know if I would recommend it as a good kit t' cert Level 1 on. Begad! I would instead recommend a kit with a larger diameter so that t' cert flight would be "slow and low". Arrr! After you get that certification though, me bucko, you sure could let 'er rip with t' Phobos!

Overall Rating: 5 out o' 5