ARM: Review - Tamiya 1/35 scale M561 Gama Goat

Kit Review: Tamiya 1/35 scale Military Miniature Series Kit No. 35330; M561 US 6x6 Cargo Truck Gama Goat; 125 parts (111 in olive drab styrene, 8 viny
l, 6 clear styrene); retail price US$47.99
Advantages: first injected molded kit of this vehicle; nicely done wheels a nd external details; excellent job on the swivel/hinge assembly
Disadvantages: skimps on many details; no cab roof or body canvas; no cargo or shelter offered to match many Gama Goats in service
Rating: Recommended (Highly Recommended for some applications)
Recommendation: for ?Cold War? US armor modelers
    As noted when reviewing the new Squadron/Signal book on this vehicle, ther e are times when an idea seems great on paper, tests well, but the reality of its execution leaves much to be desired. Such was the tale of the Gama G oat, a high-mobility amphibious truck rated at 1 1/4 short tons capacity in cross country driving.
    The Gama Goat came out about the same time as the similar Swiss Metrac veh icle did, and both were designed to provide a high-mobility 6 x 6 vehicle. Each used the same basic design: a short 4 x 4 tractor unit with a permanen tly attached trailer with a driven axle. The body was designed to move in t wo directions only: up and down, to follow the terrain, and roll from side to side to accommodate bumps and obstructions. The body did not trail and w ould not turn to follow the tractor around corners (with the Gama Goat, if it did that it was grounds to immediately ?deadline? the vehicle as uns afe).
    Robert Gamaunt, an American engineer, had been toying with a similar desig n since 1947, and in 1959 Vought Aviation took up the project to create a h igh-mobility 6 x 6 truck. The resulting prototype was all aluminum, powered by a 6-cylinder Chevrolet Corvair air-cooled engine, and weighed 3,000 pou nds. But while this eventually proved a successful design, it also had one of the key Achilles? heels of the ?Goat - the front and rear axles both steered, and keeping them in synch proved to be a nightmare.
    The prototypes entered testing in 1961 and went more than 6,000 miles most ly trouble free. But after testing in Thailand in 1963 and demonstrating gr eat mobility in swamp and jungle terrain, the Army asked for some ?change s? to be made.
    The Corvair engine was ditched, and after testing two engines the ?winne r? was a GM 3-53 diesel; a three-cylinder 103 HP wonder which on paper wa s half of the 6-53 engine then going into the M113A1. But it was a noisy, n asty engine which was mounted at head level behind the crew, and as such th e crew always had to wear protective ear muffs when driving it. It remained amphibious, but now weighed around 7,000 pounds. Between 1968 and 1972 15, 274 Gama Goats, officially the M561 6 x 6 1 1/4 Ton Truck, were built but C ONDEC.
    The ?Goat replaced the M37 3/4 ton trucks and the unhappy Jeep M715 seri es 1 1/4 tons trucks in many units, especially airborne, airmobile and ?l eg? infantry ones. In mechanized units the M561 was used either as an amb ulance or a shelter carrier, usually with an S-250 class shelter and set of generators towed on a trailer.
    On a good day, the ?Goat could do about 45 mph on highways with a 1,800 pound shelter and 3,000 pound generator trailer towed behind it. It had ver y good off-road capability and could climb amazing obstacles, even with the trailer attached. But it was a maintenance nightmare.
    Its steering gear rarely stayed aligned, and its ?easily serviced? out board brakes (they are on the outside of the wheel and not inside like 99% of other vehicles) were nearly impossible to properly bleed and adjust. Sin ce it was so articulated, it had around 22 universal joints, the failure of any one of which could bring the vehicle to a halt. If the emergency switc h inside the body was inoperative, the vehicle was theoretically deadlined (but with a shelter on the back ? which went empty nearly all the time wh en the vehicle was moving - who was going to crawl over and press it?) Also any damage to the tailgate meant it would not float (a moot point with a s helter and generator trailer anyway).
    The ?Goat first began to be replaced by the M1008 CUCV family of Chevrol et 4 x 4 trucks as they were rated as 1 1/4 ton trucks, but suffered a loss of off-road mobility as a result. The ultimate replacement was the M996 Hi gh Mobility Military Vehicle series or Humvee.
    There have an HO scale plastic Gama Goat from ROCO and several vacuform or resin kits produced over the years of the ?Goat, and I scratchbuilt one in 1984 when I was a platoon sergeant signed for 12 of these beasts. Tamiya surprised everyone in 2013 by coming out with the first 1/35 scale injecte d molded kit of the M561.
    The kit provides for a stripped-down personnel carrier variant of the Gama Goat as used by the 82nd Airborne Division, the 3rd Marine Division, or on e from the Army Reserves in 1976. I say ?stripped down? as most other A rmy units used it as a shelter carrier or ambulance, the former with an S t ype shelter loaded and held down by turnbuckles and the latter with the can vas body cover and red crosses in place. Nearly all had their canvas roof i n place, and many in Europe sported ?hard top? cabs with cab heaters in stalled. Tamiya provides none of that with the kit.
    Assembly is pretty straightforward. The best feature of the kit is a slick assembly that permits the body to react as the real ones did, namely rolli ng and pitching but not turning. This is done with a poly cab trapped in th e connection assembly and permitting the body to be removed (rarely done ex cept at a depot in service) as needed for finishing.
    The interior is fairly complete in regard to controls and decals are nicel y provided for all of the warning and indicator placards (and there were a LOT in the Gama Goat!) The control pedals (three, as the ?Goat had a 4-sp eed manual transmission) are all missing. No heater is provided for the cab (not a big deal if the ?hard top? is not provided either). Seats are a good match for the originals and while the seat controls are not present t hey were hard to see and use in the original as well.
    The kit provides an alternative winch, but the cable drum comes with a mol ded cable and no hook or clevis assembly. Towing clevises (under the bumper ) are also missing. The hood is nicely done, but is the angular version; ha lf of mine at Hood were stamped ones, so am a bit sorry Tamiya did not offe r the choice.
    One major error in the body section is that Tamiya missed the ?emergency stop? alarm switch panel on the front of the body interior wall. This wa s to provide the passengers with a way to warn the crew if something was wr ong, as they cannot be heard over the engine. For vehicles used for swimmin g, it was an immediate ?deadline? item if inoperable. There are also a lot of ejection pin marks, but most of them are either on the bottom of par ts or difficult to see.
    But like many other Tamiya softskin vehicles, much of the driveline has be en simplified or ignored and all of the connection cables between the ?tr actor? and the body have been ignored. For $48 for a relatively small veh icle one would think Tamiya could throw in some vinyl tubing and teats to s lip them on for this obvious detail to connect the front and rear. Also mis sing is the bilge pump outlet on the right side of the ?tractor? (I had one of mine actually burst into flames when this pump shorted out and the power cable ? wrapped in cotton insulation and soaked with years of fuel as it was right under the fuel filter that was to be checked daily ? igni ted!)
    Decals are up to Tamiya?s usual nice level and finishing directions are clear.
    Overall, this is a bit of a disappointing kit unless you want an 82nd Airb orne one. As noted, Tamiya COULD have added a few more details for the cost of the kit and made it a really outstanding effort.
Cookie Sewell
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