Pemberton Technologies Space Ark Jr

Pemberton Technologies - Space Ark Jr {Kit}

Contributed by Todd Mullin

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

Brief:
pem_space_ark_lackluster T' Space Ark Jr. Blimey! is a half-scale low power version o' Pemberton Technologies' (Pem-Tech) mid power Space Ark. Aye aye! It is a single stage, arrr, shiver me timbers, parachute recovery model o' t' rocket seen in the sci-fi classic "When Worlds Collide". Avast! I got me Space Ark Jr. as a matched signed/numbered edition (#8) at the time Pem-Tech released their new low power line o' products with their Bucky Jr. Ya scallywag! kit.

Construction:
T' components came packaged in a heavy, sealed poly bag. All o' t' components were accounted for and in good condition. Avast! Blimey! T' parts included are:

  • Balsa nose cone
  • Balsa tail cone
  • BT-60 airframe tubing
  • 24mm motor mount tubing
  • Keelhaul®©™® shock cord
  • Parachute
  • Nose ballast
  • 1/8" balsa fin stock sheet
  • 1/4" Launch lug
  • 1/8" Launch lug
  • Screw eyelet
  • Wrap around and tail fin alignment guide
  • Super groovy fin template sheet
  • 1/8" dowel
  • 6 page "Destruction" manual
  • Supplemental instruction sheet

This was me first kit from Pem-Tech. Begad! I had heard in t' past about their infamous "Destructions"... Layne Pemberton obviously has a well developed sense o' humor with a writin' style similar t' Douglas Adams. Begad! A very entertainin' read. Ya scallywag! T' manual includes an image o' t' completed model and only 1 illustration. Begad! Ya scallywag! T' lack of illustrations is nay a problem though, arrr, as t' build really doesn't require more than t' one.

T' build starts out by sandin' and fillin' t' body tube and nose and tail cones and alignment marks are added to the tube. Arrr! Next, t' nose ballast needs t' be added. Well, blow me down! Accordin' t' t' supplemental instruction sheet, a last minute snafu, shiver me timbers, t' initial batch o' kits did nay come with a pre-drilled ballast hole in t' nose cone. This was easy t' remedy with a large drill bit. After t' freshly drilled hole was drilled and filled with ballast and Gorilla Glue, ya bilge rat, I screwed the eyelet into t' aft o' t' cone and set it aside for t' glue t' cure.

T' fins are next. Well, blow me down! Ahoy! T' modeler must trace and cut t' fins by hand for this model. Aye aye! Like t' design, shiver me timbers, t' fin modelin' is retro as well. Ahoy! T' lack o' laser cuttin' shouldn't discourage even a moderately inexperienced rocketeer.

Next, alignment marks are put onto t' tail cone, me bucko, me hearties, which is temporarily mated t' t' body tube. Aye aye! These are used to cut t' "thru-the-tail-cone" fin slots in t' tail cone. For a beginner, shiver me timbers, this might be a challengin' step. T' slots need t' be cut cleanly, arrr, straight and correctly sized.

T' Keelhaul®©™® shock cord is glued t' t' motor mount and then it is inserted into t' tail cone after t' slots are cut, and then the tail cone is permanently glued t' t' body tube. Ahoy! T' fins are glued into t' slots on t' tail cone.

pem_space_ark_tailNext, t' gotcha o' t' kit. Ahoy! Blimey! T' wings are glued t' t' main body at a different angle than t' fins. This is well illustrated, but if you aren't payin' attention, it will ruin t' look o' t' kit. Also, me hearties, whereas t' manual tells you t' glue t' wings onto t' win' alignment line, it doesn't tell you how far forward to attach them. Blimey! Ya scallywag! I eyeballed them from t' photo o' t' completed kit and decided t' put t' trailin' edge o' t' wing just slightly forward o' t' seam betwixt t' tail cone and t' body tube.

At this point, I deviated from t' "Destructions". T' next step is t' glue t' crossbar on t' two lower fins. As this would make t' filletin' and sealin' o' t' fins much more difficult, me bucko, matey, shiver me timbers, I left t' crossbar and the fin tip dowels off until after I had put on a good, thick coat o' Elmer's Fill N' Finish and Kilz onto t' model.

After filletin' and fillin' t' balsa, shiver me timbers, I attached t' crossbar, 1/8" launch lugs and fin tip dowels.

One step that is notably missin' from t' instructions be t' attachment o' t' shock cord and parachute t' the nosecone. Probably obvious that this needs t' be done t' t' experienced modeler, but it's omission is noteworthy.

Finishing:
pem_space_ark_allsystemsgoT' finishin' on t' Space Ark Jr. Blimey! is about as straight forward as it gets. Begad! Begad! After careful sandin' and priming, a uniform silver paint scheme with no detailin' is recommended t' match the rocket from t' movie.

For those o' you that have nay tried t' get a "perfect" silver paint job, arrr, arrr, just a word o' caution. Avast, me proud beauty! Silver is probably t' most difficult paint color t' work with. Ahoy! It will show any imperfections in your model, arrr, so take your time and give this beauty t' good, smooth sandin' it deserves.

Construction Rating: 4 out o' 5

Flight:
I was a bit nervous about launchin' a rocket o' this size and weight on a D12 motor on San Diego's Fiesta Island... Way too much water all around. Avast! I ended up barterin' a C11 from someone at t' launch and felt much better about it.

T' Space Ark does nay have a thrust rin' so that it can fit a variety o' different motors, so t' rocketeer must add a wrap o' maskin' tape around t' business end o' t' motor t' keep it from slidin' up into t' model when under thrust.

T' rocket had a nice, matey, smooth boost with just a slight weathercock t' t' flight. Avast, me proud beauty! T' ejection be right at apogee. Blimey! T' C11 is PLENTY o' motor for this rocket! I'm glad I didn't go up t' t' D12...

Recovery:
T' shock cord on t' Space Ark is an extra long length o' Keelhaul®©™®. This might sound a little weird...but just a bit too long! Nay somethin' you normally hear as a comment with other manufacturers providin' extremely short shock cords with their kits!

T' Space Ark ejected perfectly at apogee and came down swingin' around itself on t' descent. Begad! Couldn't figure out why until t' model got t' t' ground. Aye aye! Arrr! T' shock cord had bound around t' shroud lines o' t' parachute allowin' it to only partially inflate.

Even with a partially opened 'chute, thar was nay damage on landing.

Flight Rating: 4 out o' 5

Summary:
pem_space_ark_wehaveignitionOverall, buildin' and flyin' Pemberton Technologies Space Ark Jr. has been a really enjoyable experience. Begad! T' oversimplified 1950's classic design has been translated into a rocket that gets attention at a launch.

T' materials supplied with t' kit are top notch. T' "destructions" are a highly entertainin' read and are still easy t' follow. Begad! Ya scallywag! Blimey! There are a few omissions o' steps, but in me experience, Pemberton Technologies is extremely responsive t' e-mails.

For me next launch o' t' Space Ark, I'm plannin' on adaptin' t' 24mm motor mount down t' a 18mm mount. Well, blow me down! With the C11 motors becomin' harder t' come by, I will probably permanently mount t' adapter t' be able t' fly on t' smaller motors.

Overall Rating: 4 out o' 5

Other:
Update: I made t' 18mm flight with good success. Ya scallywag! Blimey! Blimey! I have glued t' mount in permanently. Aye aye! Begad! Blimey! I have forwarded comments on to Pem Tech about t' destructions and they have told me that they will be revised on t' next production run.

Other Reviews
  • Pemberton Technologies Space Ark Jr By Geof Givens (August 22, 2008)

    Brief: The Space Ark Jr. is a downscale of Pemberton Technology's midpower rocket. Layne Pemberton offers a lot of really cool retro-futuristic designs. He's also a nice guy whose instruction booklets are well known for their humorous off-beat writing style. Construction: The package arrived with all necessary parts in good condition, except that the balsa nose cone had a ...

Flights

Comments:

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P.T. (September 8, 2008)
Geof has given a very fair and accurate review of our Space Ark Jr. kit. I personally apologize for the kit being sold with the old Destruction Manual, which was reported to have all the deficiencies listed and supposed to have been replaced. The updated manual has: grain directions and names on the fin templates, mounting position of the wings and improved descriptions of steps. The suggestion about moving the comment concerning 48in rods to the recommended motor section will be implemented as well as a reevaluation of minimum motors. We would be glad to replace all parts broken during an unstable flight, free of charge. Please contact us at: ooppss@pembertontechnologies.com
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G.H.G. (September 9, 2008)
After reading my review, Layne immediately wrote to me, thanking me for my honesty and offering a replacement kit "out the door today". In my opinion, this shows excellent customer service and it is not the first time I have had such good service from Pemberton Tech. I didn't need another kit, but my experience with the Space Ark won't deter me from buying another PT kit in the future. Layne also mentioned that the instructions were updated at some point.
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M.A. (September 12, 2008)
I really enjoyed building this rocket! The instructions were funny and well presented. I was worried about the thru the tailcone fin mounting, but found it much easier than I expected. The fins are VERY strong with this method. I had no trouble attaching the Kevlar® shock cord to the motor tube on mine. I did install a 24mm motor block in mine and I flew it on a C11, it flew very nice and high. A D12 would really send this rocket into orbit. PemTech has a winner here.

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