R/C Tank Combat

Tank #T018

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Type: KV-1 Armament: 76mm
Built: May 2003 Armor: 90mm
Builder: Paul Pittelli Rating: 40/4
Status: Operational Battles: 35
Owner: Paul Pittelli Points Earned: 69,297
Call Sign: Crazy Ivan Points Given: 73,000
  • Modular "drive-box" assembly using EV Warriors
  • Roller Chain Track System

    In 1939, the Red Army Command put in a request for a heavy break-through tank armed with a 76.2mm gun and armor protection capable of resisting anti-tank weapons up to the same caliber. The SMK heavy tank prototype was selected as the basis for the design, which was equipped with two turrets, one carrying the 76.2mm low-velocity gun and the other carrying a 45mm anti-tank gun. After a radical re-design in September 1939, resulting in only a single turret, the new design was designated as the KV-1 (from Klimenti Voroscilov, the Soviet Commisaire of Defence). The KV-1 was armed with the higher velocity 76.2mm L30.5 gun and more armor protection while maintaining its weight around the 43 tons.

    Upon consultation with Master Yoda (Frank), the design of the KV-1 is attempting to reap the benefits of several of the Tri-Pact tank designs. First is the motor box. The basic design of the box is a simple dovetailed drawer out of 1/2" oak plywood. A new enhancement to previous designs is the use of the powerwheel driver hub. After a little gentle persuasion, the pulley, driver hub and motor fit like a glove. A pair of standard 1/4" turn-buckles are used to tension the stationary drive axle. The motor box will be completed with the addition of the rear axle assembly (pulleys and base-mount bearings) mounted on the rear of the box.

    Click Photo For Enlargement (181 Kb)

    Click Photo For Enlargement (56 Kb)
    This is an exploded view of the basic drive components including (right to left):
  • a motor with it's splined output cog,
  • a plastic drive hub that fits onto the splined output cog,
  • a 3" diameter V-belt pulley bolted onto the drive hub, and
  • a 1/4" turn-buckle for tensioning the drive axle.

  • The drive hub makes it relatively easy to adapt the kiddie car motor to drive a V-belt pulley. As shown here, one side of the drive hub (the round black component on the bottom) has 10 molded splines that fit nicely into the 10 slots in the motor cog (the white component extending out from the motor). The other side of the drive hub has a different assembly that is intended to mate with a standard kiddie car wheel. After a little work with a hacksaw and some sand paper, that side was reduced to a flat surface, allowing the V-belt pulley to be bolted to the drive hub.

    Click Photo For Enlargement (110 Kb)

    Click Photo For Enlargement (170 Kb)
    With some careful measurements, some careful drilling and a little bit of luck, 5 bolts are installed to keep the V-belt pulley attached to the drive hub. This photo shows the inside of the drive hub.

    The kiddie car motors shown here are used in the Powerwheels Silverado vehicle, which can carry 150lbs at approximately 5mph. The motors can be purchased from Mending Shed using part number #00968-2910 for $40 (US) a pair.

    The drive hub modified for use in the KV-1 can be purchased from Mending Shed using part number #74460-2249 for $3.95 (US) each.

    (Editor's Note: An older style driver hub is also available for the same price which may not need any modifications at all, but nobody has purchased one yet so we don't know for sure.)

    The track system implemented on the KV-1 will be the Montgomery Track System (MTS). After seeing several of the track designs, the MTS was chosen simply because it's massive! Given the two six foot sections of track needed for the KV-1, an assembly line for tread production is underway. Over 100 treads have been cut to size and are being coated with epoxy for durability.

    After the first set of 100+ treads were cut, drilled, and epoxied, I find out that someone (we suspect a driver of a German tank) sabotaged the epoxy resin container by switching out the pump and replacing it with a pump from what should be used with the hardener. Simple chemistry took over and I had over 100+ pieces of goo that would harden in the year 2050! Therefore, I departed from the ways of Master Yoda (Frank) and made the next 100+ treads out of 1/8" masonite. After cutting, drilling, epoxying (this time with the right formula), and painting, the treads could not handle a simple stress test. Thus the final set of 100+ treads were cut, drilled, expoxied and painted out of 1/4" masonite (following, once again, the ways of Master Yoda). Since I was becoming an expert in tread manufacturing, I counter-sunk the top of the rivets so that the treads would have a smooth surface. Rivets used are 3/16" pop rivets with a grip range of .250-.375 inch.

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