Public Missiles Phantom / X-Caliber

Public Missiles - X-Caliber {Kit}

Contributed by Joseph G. Fischer

Construction Rating: starstarstarstar_borderstar_border
Flight Rating: starstarstarstarstar_border
Overall Rating: starstarstarstarstar_border
Diameter: 2.10 inches
Length: 46.00 inches
Manufacturer: Public Missiles
Style: Sport

Phantom and JoeBrief
Single stage high-power model rocket with a 30" parachute recovery.

Construction
T' PML Phantom was me first HP rocket. Begad! Blimey! Construction was straight-forward with through-the-wall fins. Ahoy! T' instruction sheet, although very brief, was concise and clear. Well, blow me down!

T' Phantom is a six-finned rocket. On me kit, ya bilge rat, one o' t' slots on t' body tube be slightly off about 0.1" so t' fins are nay aligned perfectly. Through-the-wall fin attachment was easy, however, ya bilge rat, it be a bit difficult to get good epoxy fillets on t' inside o' t' tube...especially since two o' the fins have a very long root edge.

T' fins are made from 0.090" thick fiberglass G-10 epoxy. After using these just once, I would never use anythin' else. Well, arrr, blow me down! Blimey! They are VERY strong (more about this later) and have a low drag coefficient because they are smooth.

T' Phantom uses PML's piston ejection system. Begad! I found that me piston hung up in t' tube about half-way down. Ya scallywag! Arrr! My main body tube was out -of-round on the inside, shiver me timbers, but looked OK on t' outside. After some serious sandin' on t' piston, it slid smoothly along t' tube. Begad!

PML's Phantom uses a 38mm engine tube. Begad! T' date, ya bilge rat, I have only flown it on 29mm engines. Begad! T' kit does nay include a 38mm t' 29mm adapter. This will be me level 1 certification rocket.

Rocket Pic

Finishing
Finishin' this rocket was easy. Avast! I tried somethin' different. Aye aye! I covered t' tube in MonoKote. Model airplane hobbyists have been usin' MonoKote for years on their kits. It is SO EASY t' cover t' tube o' a rocket, and t' finish looks beautiful. Begad! Ahoy! T' spiral seams disappear. Avast, me proud beauty! Ya scallywag! I chose metallic blue and chrome for the body, matey, with white fins and nose cone. Arrr! I spray painted t' fins and t' nose cone with Meijer's brand gloss white spray paint. Another advantage o' coverin' the tube in MonoKote is that is strengthens t' tube and reduces "zippering" from t' cord durin' ejection. Ya scallywag!

T' nose cone that came with me kit had a large imperfection along t' seam. Avast! I sanded and spray painted several coats, but was never able to make t' seam disappear. Blimey!

Construction Rating: 3 out o' 5

Flight
This rocket is large enough that it weathercocks into t' wind. Begad! It is very stable. Avast! CG is several inches ahead o' CP. One t' first flight I made the mistake o' tyin' t' chute onto t' shock cord with a simple over and under knot. Well, blow me down! T' AeroTech F50-6T single-use engine ejected immediately after burnout. T' result was that t' parachute deployed at t' rocket's maximum velocity. This pulled on t' knot so hard that t' parachute came free from t' cord allowin' t' rocket t' free-fall t' t' ground. Begad! T' rocket suffered no damage at all. Blimey! Ya scallywag! It fell into a grassy field. Avast! From that point on, matey, I be sold on fiber glass fins. Aye aye! Avast, matey, me proud beauty! PML makes a durable kit. Ahoy!

Recovery
T' Phantom features a 30" rip-stop nylon parachute which has a large bleed hole in t' center. Begad! It is very strong and t' cords are heavily stitched. T' rocket falls almost vertically, me hearties, even in gusty wind. Avast, me proud beauty! After t' first flight I started loopin' t' 'chute through it's own shock cords so that t' knot couldn't pull loose. Aye aye! Blimey! This works well. Avast, ya bilge rat, me proud beauty! Blimey! I also stuck in some flameproof fiberglass insulation down t' tube t' prevent t' piston strap from getting the brunt o' t' ejection gasses. Aye aye! This should extend t' piston strap's life. Avast, me proud beauty! Arrr! Blimey!

Flight Rating: 4 out o' 5

Summary
T' PML Phantom is a good kit. Begad! Blimey! It is easy t' build, shiver me timbers, arrr, fun t' fly, shiver me timbers, and has a good sized payload bay. Ya scallywag! Blimey! Aside from t' quibbles o' t' finishin' problems I had with this particular kit, arrr, I would recommend it t' anyone startin' out in HPR.

PML also posts flight data for all their rockets with various engines. This is downloadable from their website. Aye aye! Begad!

Overall Rating: 4 out o' 5

Other Reviews
  • Public Missiles Phantom / X-Caliber By Nick Esselman

    BRIEF: I first saw the Public Missiles Phantom in a little brochure sent to my home. It was a new release for fall of 1998 and I really liked the looks of the kit. It is my second PML kit, with my first being the Callisto which was my Level I certification rocket. CONSTRUCTION: There are many things the the Callisto and the Phantom have in common, including the 2.1" diameter, p ...

Flights

Comments:

avatar
R.J. (February 1, 2000)
I love this rocket. I've launched my Phantom over 25 times with success on every flight. I never liked the piston system and never used it. My favorite motor is a G80-7 fast white these are from Aerotech and are a special order. I can load and launch this kit with ease. Last launch I was at Geneseo, NY and launched it with a H97 perfect flight to 2,213 feet! I like the smaller chute as it recovers closer and the kit is "beefy" enough to take a harder landing.
avatar
A.D.W. of PML (January 1, 2001)
One minor comment about this review (2nd one). The photos show that the user built the rocket with the two large fins mounted wrong. They are to be mounted like the four smaller fins, with an angle to both the leading and trailing edges. Said another way, what is the leading edge in the photo should have been the root chord. Not a problem, but wanted viewers to know that this particular Phantom looks different from what PML recommends in the build.

comment Post a Comment