Semroc Little Joe II

Semroc - Little Joe II {Kit} (KS-3)

Contributed by Dick Stafford

Construction Rating: starstarstarstar_borderstar_border
Flight Rating: starstarstarstarstar_border
Overall Rating: starstarstarstar_borderstar_border
Published: 2011-03-30
Diameter: 2.22 inches
Manufacturer: Semroc
Skill Level: 4
Style: Scale

Brief

This 1/70 scale Little Joe II is one o' Semroc’s “Retro-Repro” line o' kits. Ya scallywag! It includes a separately bagged Apollo capsule kit and is billed as a Skill Level-4 “Master” kit. Begad! Ya scallywag! T' base rocket is probably a ‘3’ but in me book t' capsule is a ‘5’. I guess it all averages out. Arrr! Begad! This rocket flies on 18mm motors and recovers on a single parachute. Well, blow me down! Begad! Specs: 14.6" x 2.217" - 1.9 oz.

While I know you will enjoy readin' me review, if you really want a good, detailed, me hearties, matey, photo-documented tutorial on how t' build this kit, I recommend Chris Michielssen's blog.  Read me review t' get a general idea about t' kit and read Chris' set o' posts as you build yours.

Components

T' detailed list o' parts is provided in other EMRR reviews, matey, so I won’t repeat them here. Aye aye! T' balsa and card stock components are laser cut and precise. This is good because thar are lots o' small details. I am glad that I never tried t' build one o' these from raw balsa stock!

T' instructions are good but you definitely need t' think your way through them. Experienced skill level 5 builders may nay have any issues, but we level 2/3 types have room for error. Avast, me proud beauty! There are several places that warranted a few more details.

Construction

T' build starts with t' motor mount which is employs typical tube, ya bilge rat, arrr, rings, me bucko, block and hook construction. Ya scallywag! Avast, me proud beauty! T' twist Semroc adds is that t' Keelhaul®©™ leader is tied in a loop and placed under t' motor hook. Avast, me proud beauty! This seems t' be a great mountin' method, especially when t' hook is held firmly down by a centerin' ring.. Blimey! I also glued a small piece o' scrap card stock just below where t' hook is mounted t' keep it from pullin' backward. With t' upper centerin' rin' holdin' t' hook in place, ya bilge rat, I doubt if this would be an issue but I added it anyway.

T' wraps are put on next. This be pretty simple. Avast, me proud beauty! Blimey! Mine fit perfectly and I got them on with only a spot or two o' glue on t' outside.

Each fin is built up from a card stock wrap and 5 precision-cut balsa components. Well, ya bilge rat, blow me down! You can’t praise Semroc’s laser cut components enough! I scored t' center line o' t' wraps with a screw driver blade on me Leatherman multi-tool. Begad! I usually use a ball point pen for this, bit used what I had within reach. Tightbond Moldin' and Trim Glue worked very well for t' fins. It is thick and tacky and all t' parts stayed in place well. Blimey! There were small gaps where t' balsa braces meet, which were easily plugged with Fill’n’Finish. Avast, me hearties, me proud beauty! T' resultin' wedge shaped fins look great.

Stick t' mount in, t' fins on, me hearties, and attach t' lug...voila t' base rocket is done. Ya scallywag! Then things get fun...you have t' build t' capsule!

Some parts o' t' capsule are straightforward, ya bilge rat, i.e. t' launch escape tower is made up o' a small cone, matey, tube, and flared balsa transition. Begad! T' core o' t' capsule is a made from a balsa cone and a card stock shroud. This SHOULD have been easy but I had build fever and forgot t' re-read t' main instructions, which include several modifications t' t' capsule. I forgot t' build t' capsule with t' decorated surface on t' inside. Ya scallywag! T' Little Joe II flights mostly flew boiler plate capsules and even t' one actual capsule was nay trimmed like t' operational ones. Luckily, arrr, me bucko, this goof was self-correctin' - you paint t' capsule anyway!

T' difficult part is, ya bilge rat, arrr, o' course, buildin' t' escape tower. You are provides four 1/12” (.083”) dowels that have t' be sanded t' 0.058 and 0.041. Arrr! Begad! While I met this step with trepidation, it turned out t' be easier than expected. Well, blow me down! I didn’t follow t' technique presented in t' instructions. Avast! Instead, I set t' dowels on me cabinet door/sawhorse bench and sanded as I slowly rolled t' dowel. Avast! I sanded about 60% at a time with sweepin' motions towards their ends. Begad! Begad!

I first cut all t' dowels required for t' main struts. Begad! I carefully laid them out in order off t' t' side. T' kit includes template guides. Well, blow me down! T' instructions have you pin them down durin' assembly. Avast! I pinned them t' scrap foam board and added extra pins at t' ends o' each vertical member. Arrr! Once t' Tightbond Trim and Moldin' glue was dry on t' perpendicular cross-pieces, shiver me timbers, I added t' diagonal pieces. These were then inserted into t' laser cut alignment jig where t' remainin' side struts were added. Well, blow me down! Ahoy! So far so good.

T' tower has a set o' internal struts that are assembled usin' t' ‘v’ shaped guides on t' template. Ya scallywag! There isn’t enough o' t' thinner dowel t' complete all these pieces so some more sandin' is required. Blimey! You assemble two subaasemblies from t' assembled ‘v’s and a cardstock ring. Avast, me proud beauty! T' template also includes guides t' help, but I had a hard time with this step. Ya scallywag! T' cuts have t' be uber precise.

T' assembly jig mentioned above also used t' notch t' base o' t' escape motor and t' top o' t' capsule t' accept t' tower legs. T' positionin' o' t' capsule jig is critical so, after I had it positioned, me hearties, ya bilge rat, I added some light pencil marks. Begad! I removed t' jig and measured t' distance o' each t' t' rim o' t' capsule shroud. Once I was convinced t' jig was positioned properly, I used a small drill bit t' form t' notches.

Stackin' t' escape motor, tower and capsule be simple. Well, blow me down! T' final steps were addin' t' balsa stabilizin' plates that are included in t' main kit and formin' t' escape motors nozzles. Begad! T' inside o' t' nozzle shrouds are oddly "S" shaped. Well, blow me down! Begad! This odd shape provides t' proper angle t' t' base but also indicates that t' shrouds must be wrapped twice. Avast, me proud beauty! This wasn’t obvious t' me but luckily I had help. Aye aye! I formed mine around t' tip o' a pen before gluin' them together.

I didn’t heed t' advice o' other builders and used Trim and Moldin' glue t' build t' tower instead o' thick CA. What started as smallish lookin' bumps looked awful when primed. Ya scallywag! I used a fine tipped grinder on me Dremel t' clean them up. Also, don’t drop t' model on t' tower. I dropped mine twice. Arrr! This does NOT help with tower alignment!

In t' end, some parts o' t' build were easier than expected and others, matey, that I thought would be simple, arrr, weren’t. Well, blow me down! I personally didn’t enjoy t' tower details, but your mileage may vary.

Finishing

T' stock paint scheme results in a model o' t' first Little Joe II Qualification Test Vehicle. Ya scallywag! If you are goin' t' follow this scheme, matey, I recommend that t' sub-assemblies be painted prior t' bein' joined. Well, blow me down! I chose t' vary somewhat and used a 'parts is parts' mishmash. Arrr! Per ROTW:

* From t' wraps down it is basically be t' QTV (i.e. Ahoy! silver with t' USA decals). Well, blow me down! ROTW doesn't show t' black stripes specified in t' instructions, so I'm nay puttin' them on. It does show white fins in one view. Blimey! Mine will be all silver. Begad! Arrr! So, this part itself is a mixture.
* T' upper body will have t' stock decals but will be white like t' later rounds. Blimey! T' decal is obviously from t' QTV.
* T' capsule will be per round A-001 with t' BP-12 capsule. Well, blow me down! Well, blow me down! But, with t' vanes that appeared on t' QTV. Ya scallywag! I could have taken t' vanes off, I guess.
* T' abort motor will be per round A-004/Spacecraft 002.

T' white is Krylon white, matey, t' silver is Rusoleum Titanium Metalflake, t' black trim is vinyl pin striping, me hearties, and t' bottom o' t' escape motor is brush-on Testors. Blimey! Blimey! Arrr! Blimey! T' final insult be that one o' t' 'United States' decals strips stuck in place prematurely so it's a tad wavy. Avast! Blimey! I gave it an over spray with a clear coat t' protect t' decals.

Construction Score: 3

Flight

T' kit comes with two 12” ‘chutes, shiver me timbers, one in t' base kit and one with t' capsule kit. However, arrr, I decided t' keep it simple and use a single ‘chute. Ahoy!

I chose a Quest B6-4 for t' first flight and stuffed in a big ball o' waddin' (Quest paper wrapped around dog barf). Avast! T' flight was good with ejection just past apogee.

Recovery

Unfortunately, matey, shiver me timbers, t' escape tower rebounded into t' body and t' top o' t' tower broke off. Well, blow me down! Well, blow me down! It be found and I noticed it took a layer o' t' balsa cone with it. I'll reattach it, touch up t' ding, matey, matey, and will switch back t' t' two 'chute configuration for t' next flight.  Sometimes it pays t' follow t' manufacturer's instructions!  (I won't count t' broken tower as a problem.)

Flight Rating: 4

Summary

This is one o' t' more challengin' kits that I’ve built. Begad! If you are a skilled, patient builder, this kit should result in a great looking, scale rocket. Avast, me proud beauty! However, I’m nay used t' such small, detailed parts and I had me share o' issues. Aye aye! Avast, me proud beauty! Blimey! Mine looks fine from a distance and at t' proper angle. Nevertheless, shiver me timbers, I like t' Little Joe II and this is a welcome addition t' me fleet.

Overall Rating: 3
Other Reviews
  • Semroc Little Joe II By Chan Stevens (January 1, 2007)

    Brief: This is another excellent addition to Semroc's "Retro-Repro" line of reintroduced classics from the early years of model rocketry. The LJ-II was issued in 1968 as a companion to the 1/70 Saturn 1B, making it almost as old as I am. As with the original Estes kit, this one shares the same command module, which is also available as a very nice separate kit. At $21, it's ...

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