Pemberton Technologies Bucky Jones Space Cadet

Pemberton Technologies - Bucky Jones Space Cadet {Kit}

Contributed by James Gartrell

Construction Rating: starstarstarstarstar
Flight Rating: starstarstarstarstar
Overall Rating: starstarstarstarstar
Manufacturer: Pemberton Technologies

Brief:
Layne Pemberton contacted me, after a recommendation from Don Magness of Squirrel Works Model Rockets, t' beta test his "Bucky" rocket. Avast, me proud beauty! Well, what could I say but, me bucko, "Heck yeah!" This be t' first release o' three very nice lookin' rockets upcomin' in t' growin' fleet o' rockets available from PemTech. Begad! Begad! If you're lookin' for somethin' a little different, me bucko, forget it. This kit, arrr, matey, like all o' t' kits from Pemberton Technologies, is a lot different! Layne has done a superb job o' capturin' t' magic o' Sci-Fi in this 3" diameter 29mm rocket, me hearties, and it is provided at a very reasonable price.

Finished Rocket

Construction:
T' kit includes:

  • 3" LOC kraft angle-cut tube
  • 8 18mm exhaust tubes
  • 3 1/8" ply TTW pre-cut fins
  • 2 1/8" basswood "probes"
  • 2 3" t' 1.1" ply centerin' rings
  • 7.5" 29mm motor mount tube
  • wire motor retainer
  • 11" LOC nose cone
  • 10 nose ballast weights (105 grams total)
  • 8' 9/16" nylon/Keelhaul®©™® shock cord
  • 1/4" kraft launch lug

As noted when you visit Layne's website, matey, you should be prepared to "build" your rocket. While that's true, me bucko, arrr, shiver me timbers, t' main fins and body tube are cut for you, so thar isn't anythin' I would consider extremely difficult - tedious, me bucko, me hearties, maybe, but nay really that difficult. Blimey! Blimey! Regardless o' t' "no frills" nature o' t' kit, I was impressed, overall, with parts quality. Most o' all, though, I be impressed with how all t' parts came together creatin' a beautiful rocket.

T' kit arrived with t' parts packed in t' shippin' box. Avast, me proud beauty! Again, me bucko, no frills here, shiver me timbers, however, arrr, t' included CD be a nice touch. Ahoy! Besides t' printed instructions, me hearties, t' CD has t' instructions in both pdf and Word files, the RockSim file with a link t' Apogee's site t' download t' trial version, me hearties, plus a lot more. T' CD is useful for a couple o' very practical reasons. Blimey! Arrr! First, if you get a little wild with t' CA and glue a couple pages together, me hearties, ya bilge rat, you can reprint t' particular page. Aye aye! Second, after buildin' me rocket I weighed it and measured out t' CG, then modified t' RockSim file t' include t' specifics of my build t' get a better idea o' how me rocket would perform. Ahoy! Now that's nice!

T' instructions are well laid out with numbered "destructions" (Layne's well-practiced humor is interlaced here and throughout the instructions) and fully illustrated, me hearties, so you get lots o' help when doin' things like "creating" a cockpit from a block o' balsa. Aye aye! T' instructions for shapin' t' cockpit are very detailed. Blimey! Followin' them, shiver me timbers, I be able t' get somethin' close t' what's pictured, but it still displayed me own individuality. Well, blow me down! Well, blow me down! Pretty cool, really. Avast, me proud beauty!

T' most difficult step for me was cuttin' out t' tiny forward "probes" from a small slab o' 1/8" basswood. Begad! Cuttin' t' curves on somethin' that small takes some patience. Avast! Blimey! I cut them a little larger than marked and then used 100-grit sandpaper t' brin' it in t' t' mark. Well, blow me down! T' exhaust tubes also had t' be cut from longer tubes. Ya scallywag! There wasn't any leftover tube, so mark t' exhaust tube cuts first before actually cuttin' them out. Begad! T' wire hanger used for motor retention blends well into t' exhaust tubes and is a nice solution for positive motor retention in this unique design. Ahoy! Avast!

A Dremel is a nice tool t' use for cuttin' t' fin slots in t' tube. If you don't have one, ya bilge rat, arrr, they're a worthwhile investment for this step plus a lot of other rocket-buildin' activities. Arrr! Blimey! Installation o' t' motor mount, fins and forward centerin' rin' is pretty standard, except rather than fillin' t' fin cavity with expandin' foam, me bucko, me hearties, as suggested, I borrowed a technique from Don Magness and cut six 1/4" dowels just shy o' t' length o' t' fin tabs and tacked them in with CA on either side o' each tab against t' tube wall and then filleted t' fins, me hearties, motor mount and forward centerin' ring.

After installin' t' aft centerin' rin' and exhaust tubes, me hearties, I made two other modifications t' t' kit. Aye aye! I installed an eyebolt in t' nose cone, ya bilge rat, and rather than usin' t' provided Keelhaul®©™® for t' shock cord attachment, I used a heavier grade for an extra safety measure. Arrr! T' shock cord be long and sturdy 9/16" tubular nylon/Keelhaul®©™®. Very nice! Blimey!

I cut t' kraft launch lug in half and used J-B Weld t' anchor them. Avast! Avast! The side-by-side arrangement o' t' lugs creates t' illusion o' a couple of cannons underneath t' cockpit, another very nice design feature. Well, blow me down! Begad!

A bright yellow 30" nylon parachute with nylon shrouds is provided to brin' Bucky safely back t' t' ground. Well, blow me down! T' lines were epoxied t' t' nylon and lightly tacked in, ya bilge rat, so I had a friend sew over them again for extra security. To protect t' fins on recovery, a length o' Keelhaul®©™® is also attached through a small hole in t' dorsal fin and attached t' a loop in t' shock cord t' brin' t' rocket down flat.

ReadyFinishing:
Finishin' t' rocket was a lot easier considerin' t' quality o' t' main tube. It is really nice. Well, blow me down! So nice, I didn't even attempt t' fill t' lines. Avast! Begad! You have to get really close t' see them. Aye aye! After filletin' t' fins with epoxy and sandin' everythin' with 220-grit, I completed final sandin' with 400-grit. Begad! Then sprayed on an undercoat o' Kilz t' seal off t' epoxy and sanded with 320-grit. Sprayed on a coat o' Krylon primer and then spot sanded, ya bilge rat, sprayed another coat of Krylon primer and then sanded with 400-grit. Arrr! Masked off t' fins and body and painted t' exhaust tubes and motor tube with DupliColor millennium silver. After t' back end dried, shiver me timbers, I covered it with tin foil and applied t' first coat of Rustoleum gold t' t' rest o' t' rocket. After that dried, I sanded with 600-grit and then applied t' final coat o' gold. Aye aye! There are no decals t' apply, so next I applied a couple o' coats o' Future floor wax t' protect t' finish and improve t' shine. Tada!

Construction Rating: 5 out o' 5

Flight:
After what seemed an eternity, ya bilge rat, finally, t' day for Bucky t' fly arrived. He would be flyin' from t' DARS Windom field, a huge plowed field that often sports flights t' 16,000 feet or more. Avast! Ya scallywag! Skies were partly cloudy but t' ceiling was well above Bucky's intended altitude. Begad! Unfortunately, t' wind was blowing between 15-20mph with occasional let-up t' maybe 7-12mph. Nay t' best conditions for a flight, matey, considerin' Bucky's large fins. Ya scallywag! Begad! However, t' ground was soft, which was great for landin' in high winds. Arrr! Avast! This also provided an advantage due t' t' horizontal recovery method Layne engineered for Bucky.

A buddy o' mine was plannin' t' come with me t' watch over t' assembly of my first reload motor, ya bilge rat, but he had t' work. Begad! So, me hearties, rather than use t' reload motors I had, arrr, I went down t' Bob Korman's area t' pick up a couple o' his single use Roadrunner motors. Well, blow me down! His F60 motor looked like a good choice, me bucko, but the only available delays were 4 and 7 seconds. Two o' t' recommended motors were the Aerotech F52-5 and G64-7. Begad! Hmm. Arrr! What t' use? Considerin' t' wind, ya bilge rat, I opted to use t' 4-second delay. Avast, me proud beauty! T' lip on t' back o' t' motor fit t' motor retainer perfectly, but for extra security I taped t' motor retainer t' the motor tube. Blimey! After preppin' (PemTech included plenty o' cellulose wadding), Bucky and I headed t' t' launch pad. Ya scallywag! Avast, me bucko, me proud beauty! Blimey!

Slidin' Bucky over t' ¼" launch rod, me bucko, I noticed I needed something to hold Bucky up further from t' bottom o' t' pad. Ahoy! Arrr! So, I found a corn stalk that be used t' prop t' rocket up about eight inches above t' pad. Arrr! Great! Igniter was hooked up (Roadrunner motors come with a very nice igniter), pad was tested and armed, matey, ya bilge rat, and Bucky was ready for flight. Aye aye!

Naturally, shiver me timbers, arrr, Bucky had gained everyone's attention so most everyone was waitin' for t' launch. Blimey! Bucky is holdin' firmly t' t' launch rod and ready to go. Avast, shiver me timbers, me proud beauty! He looks confident, arrr, me bucko, majestic and very cool. Launch was truly spectacular and really wowed t' crowd. Avast! Begad! Despite t' wind, arrr, Bucky jumped off t' pad with authority and climbed arrow-straight into t' air. Avast! With no twists or even the slightest turn, it was a beautiful flight. Aye aye! Avast, ya bilge rat, me proud beauty! I could hear t' oohs and aahs of the crowd as t' rocket began t' coast upwards.

Recovery

Recovery:
T' chute popped just before t' top, arrr, shiver me timbers, matey, but it had slowed down enough that the chute deployed without problem. Arrr! Ya scallywag! Gracefully, shiver me timbers, Bucky returned t' Earth in horizontal fashion. Begad! T' chute is perfect for this rocket. With t' parachute leadin' t' rocket, it landed on t' rounded edge o' t' fins and then dipped the front o' t' body tube into t' ground. I had strengthened t' front o' the tube with CA, shiver me timbers, so no problem with that, arrr, and with t' firm grip on t' dirt the parachute couldn't drag t' rocket (several others had problems with that durin' t' day because o' t' high winds). Recoverin' in perfect shape I had planned t' fly Bucky again t' next day, ya bilge rat, but it rained. Aye aye! Aye aye! Great flight, though, with a great rocket! Stay tuned for t' further adventures o' Bucky Jones - Space Cadet!

Flight Rating: 5 out o' 5

Summary:
This was me first time t' build a rocket t' fly on anythin' bigger than an Aerotech E-motor. Avast, me proud beauty! I found t' instructions very easy t' follow and logically arranged. Begad! Avast! Bucky is a nice rocket t' build if you want t' make t' transition from model rockets t' mid-power with some flair. Ahoy! It's a very cool rocket!

Pros:

Great design, matey, ya bilge rat, quality parts, me hearties, excellent instructions, and a nice long shock cord

Cons:

NC/Shock cord attachment - I like this t' be solid. Begad! T' recovery o' your rocket is dependent upon that holdin' together.

Overall Rating: 5 out o' 5

Flights

Comments:

avatar
J.L. (September 21, 2006)
This is the kind of design that makes rocketry fun! Kudos to Layne; very cool.

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