The Tamiya Blackfoot was a 1/10-scale, electric radio controlled model monster truck produced by the Tamiya Corporation of Japan. It was released October 8, 1986 and produced through 1993.
Importance
Available only in kit form less the necessary radio equipment, battery pack and charger, the Blackfoot was one of the most notable contributions to the growing radio controlled model car hobby due to its relatively inexpensive purchase cost, ease of assembly, an excellent instruction manual - Tamiya's are regarded as among the finest in the hobby industry - and wide availability of both factory and aftermarket parts to improve performance and durability as well as to simplify and expedite inevitable repairs.
Basis and variations
The model's space frame chassis was molded from ABS engineering resin and was identical other than color to the Tamiya R/C dune buggy on which the Blackfoot was based, "The Frog." The Frog's main chassis parts are grey while the Blackfoot's are bright red, presumably since the chassis was far more visible on the Blackfoot. The highly-detailed styrene body was that of a Ford F-150 Stepside pickup, itself a carryover from an earlier Frog-based release of the F-150. Two other similar early releases were given the "monster treatment" as well. The "Monster Beetle" was topped with a replica of a Volkswagen "Baja Bug" while the "Mud Blaster" was a Subaru BRAT sport truck. Mechanically identical to the Blackfoot, the only other differences in these two models besides the bodies were plastic wheels vacuum-plated in a golden finish, the inclusion of rubber-spiked tires for slightly improved off-road traction and oil-filled, coilover shock absorbers. The retail price of the Monster Beetle and Mud Blaster was about twenty percent higher than that of the Blackfoot, mostly due to the improved shocks. The Blackfoot's inclusion of simple coilover "shocks" less the benefit of oil dampening kept the initial cost of the kit down. Since the oil-filled units were available separately in kit form, Blackfoot owners could easily upgrade once their budget allowed.
Problems and solutions
As rugged as the Blackfoot and its variants were, the design suffered from a number of problems with its drivetrain. Its hexagonal-shaped "dogbone" axles, while allowing for an independent rear suspension, were extremely prone to wear because of the oversized wheels and tires as was the nylon and pot metal -geared differential. Interestingly, the pot metal parts generally wore out before the nylon parts did. Miniature ball bearings were an extra cost option to replace the nylon bushings packed with the model for both the transmission and wheels, but were a necessity since rapid wear of the bushings meant a complete overhaul of the transmission and partial disassembly of the rear suspension unless the kit was assembled with bearings from the outset. The expensive, heavy plastic bodies (with a replacement cost roughly half the price of an entire kit) made the model prone to rollover, eventually resulting in a badly scratched, unattractive replica. The tires themselves, even the spiked ones, were basically unsuitable for the off-road situations that the kit was intended for. Several R/C companies rose to the challenge, especially four Southern California companies: MRP, Pro-Line, Thorp Corporation and Robinson Racing. MRP specialized in heavy-duty modified parts, Pro-Line was (and is) a highly-regarded manufacturer of R/C wheels, tires and bodies while Thorp and Robinson engineered expensive but rugged differentials and axles, allowing the use of much more powerful, R/C-specific motors than the Mabuchi RS-540 shipped with the kit; this motor was originally designed for use in heavy-duty computer printers. A North Royalton, Ohio-based company, Parma Corporation, made a series of replacement bodies vacuum-formed in lightweight, clear polycarbonate plastic including a direct replacement whose tooling was made from an original styrene body.
The Blackfoot today
Tamiya currently markets a completely updated model called the "Super Blackfoot." The original is out of production, but its parts and aftermarket accessories remain popular with collectors. As for the aftermarket manufacturers, Robinson, Parma and Pro-Line are still in business producing R/C parts; MRP is out of business and Thorp has changed their focus to the production of emergency medical equipment.
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