Neubauer Rockets Gemini Titan (1/100th)

Neubauer Rockets - Gemini Titan (1/100th) {Kit}

Contributed by David Fergus

Construction Rating: starstarstarstar_borderstar_border
Flight Rating: starstarstarstarstar_border
Overall Rating: starstarstarstar_borderstar_border
Diameter: 1.20 inches
Manufacturer: Neubauer Rockets
Skill Level: 2
Style: Scale

Rocket PicBrief Description:
1/100 scale, shiver me timbers, single stage, parachute recovery, model o' t' Gemini Titan. Ahoy! Blimey! Well, blow me down! Blimey! It has a clear fin assembly attachable for flight and a nozzle assembly attachable for display. Arrr! Blimey! This kit is a good addition t' t' fleet o' 1/100 scale NASA vehicles provided by various manufacturers. Begad! Blimey! It is a little pricy for the materials provided, arrr, but you are payin' for t' scale model as much as you are payin' for a rocket kit, ya bilge rat, and should expect t' pay a little more. Arrr! Blimey!

Construction:
T' packagin' is a zip-loc bag with black and white cardstock cover, and a one-sheet, two-sided instruction sheet with diagrams and brief instructions. All parts were included, and in good shape. I especially liked t' thick body tube, which is definitely sturdier than I am used t' with Estes kits. Ya scallywag! Aye aye! T' nose cone is made from a heavy resin, instead o' balsa or plastic. Well, blow me down! This eliminates the need t' put any weight in t' nose cone for stability later. Begad! It feels nice and solid! T' parachute material is "slicker" than t' Estes-type plastic, which initially appears t' be a plus, me hearties, but did create a problem which I will get into in a bit. T' instructions were too brief for an inexperienced person, arrr, shiver me timbers, and assume some knowledge o' construction techniques. Aye aye! T' first decision t' make before startin' is whether t' trust tapin' t' engine for engine retention. Arrr! I chose nay t' and added an engine hook t' t' motor mount in step 1. Ya scallywag! If you wish t' use a Keelhaul®©™® shock cord mounted t' t' engine mount, you might consider that before step 1 as well, and addin' it t' t' engine mount. In step 2, shiver me timbers, thar be a typo that has you puttin' t' motor mount into t' 2mm body tube. Begad! Blimey! They mean t' 29mm body tube. Ahoy! There are a number o' typographical errors throughout t' instructions, me hearties, but none are fatal t' understandin' the meaning. Begad! T' resin nose cone does nay come close t' fittin' in t' thicker body tube, arrr, me bucko, me bucko, and must be sanded t' fit. Aye aye! This is preferable t' bein' too loose. Arrr! Do this before step 4 when you paint t' nose cone, shiver me timbers, and install t' screw-eye. Postpone step 5 (attachin' t' shock cord t' t' nose cone) until after t' body wrap decal has been installed in step 8. Ya scallywag!

Now for t' parachute assembly: T' tape disks are inadequate in that they do nay stick t' t' parachute material. Avast! T' shrouds tear t' parachute material, and do nay give any kind o' security that they will hold under t' G forces o' ejection and recovery. Aye aye! I used an Estes plastic 12" chute for recovery, shiver me timbers, matey, arrr, and it worked fine. Blimey! Aye aye! I would still like t' use these better feeling parachutes provided in t' kit, arrr, but need t' find a better way o' attachin' the shrouds. In step 7, shiver me timbers, thar be no mention o' a swivel hook for attachin' the parachute shrouds t' t' nose cone screw-eye. I seem t' remember from me BAR days that Estes instruction used t' include them; I certainly wouldn't have thought o' it on me own when I was 12, so they must have. Ya scallywag! Usin' a swivel hook sure seems t' reduce shroud line twistin' as t' rocket comes down. Arrr! T' down side o' a swivel hook is if it fails (i.e. Blimey! breaks) under G force, me hearties, although it has nay happened t' me yet. Aye aye!

In step 8, t' body wrap decal is slightly bigger than t' external circumference o' t' body tube, shiver me timbers, so I would recommend accurately measurin' the circumference with a strin' t' reduce some o' t' overlap, shiver me timbers, prior t' cuttin' out the decal.

Step 9 and 10 builds t' detachable fin assembly. Well, blow me down! Blimey! Do nay use 5 minute epoxy that t' instructions call for. Ya scallywag! Engine heat durin' boost melted t' epoxy causin' failure o' t' fin assembly. This step was very time consumin' as the clear fin material needed t' be scored very carefully t' allow bendin' it properly. Avast, arrr, me proud beauty! Blimey! T' instructions do nay tell you how t' score t' plastic, or on which side t' do it for which bends. It would be a good idea t' poke holes in the fin material for epoxy rivets, arrr, just as in step 11 for t' launch lug. Aye aye! If you use an engine hook, you need t' cut out a little slot on t' inside o' the 18-24mm rin' so it can slide on over t' engine hook. Be careful o' where you put t' slot, as t' launch lug needs t' be clear o' t' fins when on t' pad and on a launch rod.

In step 11 for t' launch lug, t' instructions do nay specify that the holes are put in t' side o' t' launch lug that will attach t' t' body. Aye aye! Arrr! the reason is so that little epoxy rivets will form on t' inside o' t' launch lug formin' a more secure bond. Arrr! Blimey! T' launch lug is clear as t' nay detract from the appearance o' t' decal from a distance. It is a good idea. Avast, me proud beauty! Note that even though t' launch lug is sized for a 3/16" launch rod, once t' epoxy rivets are inside t' lug, ya bilge rat, matey, it will be too snug for a 3/16" rod. Avast, me proud beauty!

Finishing:
T' only note I would add t' finishing, is that it would have been nice t' have a few decals for t' capsule. Blimey! Havin' a detailed body wrap makes t' body appear very detailed, but then you have t' painted but otherwise naked o' detail nose cone. Arrr! It is shaped very well, matey, but t' windows are nay obvious from a distance and thar be nay even a flag or hatch outline. Aye aye! T' appearance o' t' top o' the rocket is incongruous with t' bottom. Well, blow me down!

Construction Rating: 3 out o' 5

Flight:
If you use an engine hook, you need t' install t' engine before t' fin assembly, as t' fin assembly locks down t' engine hook. Avast! Begad! I used a B6-4 for the maiden flight as recommended by t' cover card. Begad! T' rocket be launched in about a 15 kt. Avast, me proud beauty! Aye aye! variable breeze, and flew well without much wind cock. Avast, me proud beauty! Aye aye! The rocket flew t' about 250 feet (+- 50ft) on this engine. Ahoy! Ahoy! It would have been nice for t' manufacturer t' provide an estimate o' t' expected height on t' two recommended engines (B6-4 and C6-7). Begad! T' four second delay on t' B engine was about right for ejection near apogee. I have nay done a C engine yet as t' fin assembly failed on t' maiden flight. Ahoy! T' 5 minute epoxy recommended by the instructions couldn't stand t' heat transmitted from t' engine casin' clay into t' fin assembly cardboard ring. Ya scallywag! Avast, me proud beauty! Two o' t' three fins came off near the end o' t' flight and were lost durin' recovery. Well, blow me down! This also may have been due to scorin' t' fin material too deeply t' allow t' bending, arrr, but I also applied generous epoxy t' all t' scored joints, so it is unlikely. Avast, me proud beauty! Since t' pieces were lost, a complete failure mode effect analysis (FEMA) is impossible. Ya scallywag! The remainin' fin did show evidence o' melted epoxy at t' joints on t' cardboard ring.

Recovery:
T' 12" chute would be too small for a hard surface landing. Begad! Avast, me proud beauty! It came down a little fast for me taste. Ahoy! It is OK for a sod field, however. Begad! A bigger chute would fit in this body tube, me bucko, shiver me timbers, so a less breezy day would call for a bigger chute. Aye aye! No other damage was evident from t' flight or ejection force. I would consider a Keelhaul®©™® cord if you plan on flyin' this a lot. I don't think that is a good idea with t' flimsy fin assembly. Well, blow me down! Ya scallywag! Blimey! Other than t' fins, this is a very sturdy rocket. Aye aye! Blimey!

Flight Rating: 4 out o' 5

SUMMARY:
PRO's: sturdy body tube, arrr, sturdy and detailed nose cone, arrr, full body wrap decal, and inclusion o' engine bells for static display.
CON's: fin assembly construction and material as well as poor instructions on use o' 5 minute epoxy, parachute shroud attachment, me bucko, lack o' engine hook, and lack o' decals for t' capsule.

Some aspects o' this kit are very sturdy, me bucko, well thought out, and above standard, matey, while others are weaker. Avast! Because it is 1/100 scale, ya bilge rat, it is a good addition t' a fleet o' 1/100 scale models, and a good comparison of relative sizes when all o' t' fleet are together.

UPDATE 7/99 - As an addendum t' me review, I communicated t' problem with t' fin assembly t' t' vendor, Discount Rocketry, and they quickly provided replacement parts, as well as a personal note from Jim Neubauer that he had nay scored t' fin material t' enable bendin' into t' proper shape. Begad! He has flown t' rocket over 20 times with no indication o' t' problem I had. Ahoy! Begad! The jury is still out, so I would recommend nay scoring, me hearties, but use a hardier epoxy anyway. Avast, me proud beauty! Begad! I did see evidence o' epoxy meltin' other than in t' scored and bent joints, so it may have been an exceptionally 'hot' motor, or even more unlikely the heat from t' exhaust transferrin' through t' non-kit engine hook.

Overall Rating: 3 out o' 5


[NAR][Sport Rocketry]

T' followin' excerpt is from "Sport Rocketry". Avast, me proud beauty! T' intention is t' allow guests t' get a basic feelin' about a kit. Begad! We strongly suggest that you get a copy o' the referenced Sport Rocketry and read t' entire article. Inside you will find many helpful hints in construction as well as other useful information. Begad! For more information, matey, use t' two links above.


Neubauer Rockets - 1/100 Scale Gemini-Titan
(Sport Rocketry - Mar/Apr 1998 - page 30 - by Thomas Beach)

[Picture]"T' model features a Gemini capsule nose cone molded in solid plastic, and a sturdy thick-walled body tube."
"T' kit comes with a self-adhesive full body wrap decal . Aye aye! Well, shiver me timbers, blow me down! . ." 
"For display t' kit has removable nozzles molded from solid plastic."
"For flight clear plastic fins are added."
"T' assembly instructions for t' kit consist o' two pages o' simple drawings and text, which is about right for this easy-to-build rocket."
"T' instructions include an addendum on parachute construction (which is good, ya bilge rat, since t' similar parachute in their 1/100 scale Mercury Redstone gave me problems)."
"T' parachute material is a slick white plastic which opens reliably without 'chute powder'"
"T' only recommended engine for t' model be t' C6-7 . Ahoy! . Begad! . Blimey! I tested with a B6-4."
"T' flight was good (with ejection slightly before apogee) and the parachute deployed fine."
" . Begad! . Avast! . Begad! Blimey! is a wonderful kit for anyone who loves models o' manned space boosters."

T' entire article gives t' impression is that this is a nice kit for a beginner/intermediate modeler.

Flights

Comments:

avatar
R.G.B. (December 11, 2001)
I built this model more "stock" than the initial reviewer. I use 4 or 5 layers of tape to tape the engine in and to friction fit the fin unit. I think that the tape provides additional thermal insulation that prevents melting the fin unit. I would highly recommend NOT using a flat blast deflector for this model. This will increase the life span of the fin unit. Finally, this kit really needs a decal set for the Gemini capsule. That would be a welcome addition to a very good kit.

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