Trailing-Arm Rear Suspension
;e rear end uses a trailing-arm-type suspension; one side of the arms
pivot in the transmission housing, while the other side rides inside a plastic
mount. Grease is required on the pivots in order for them to operate freely.
Molded levers reach past the pivots, and they are used to mount the
rear shocks to the suspension. ;e other end of the rear shocks
mount to the side of the chassis, which makes the shock
horizontally mounted. All four shocks on the
Blackfoot are oil filled and use a dual O-ring
seal to keep debris out and the oil in.
;e chassis for the Blackfoot has been
around for many years and has been
used on other iconic Tamiya vehicles,
like the Frog and the Brat. It consists of
a left and right ABS injection-molded
space frame, and they are
connected by way of plastic
cross-members and the
transmission housing. A small
metal skidplate up front adds
sti;ness and provides protection
to the bottom of the chassis. ;e
steering servo and electronic speed
control (if you have a small one) are
mounted in the front of the chassis
between the halves of the chassis.
A molded cover above them provides
protection from the elements and, at the
same time, adds sti;ness to the truck’s
front shock tower. A plastic door under
the chassis pivots to allow the battery to be
installed, while plastic tabs on each side of
the chassis keep it from sliding around.
Soaking up the bumps in the front is an independent suspension that features non-adjustable
upper and lower links that are captured by an
aluminum C-channel mount on the chassis. Radius
arms on each side span from the chassis to the
bottom of the hub carrier, and they are there to
keep the suspension arms from bending backward
when the front tires hit obstacles. ;in steering
links with ball cups are used to set toe, and they
are connected to a multipiece servo-saver.
Short, girderlike arms
hold the C-hubs, which
also serve as the shock
mounting location. Note
the wire radius arm.
Above: ;e Blackfoot uses a trailing-arm rear suspension to soak
up the bumps and oil-filled dampers keep things under control on
all four corners.
Below: ;e space-frame chassis features two side pieces,
which are connected by way of plastic cross-members and
the transmission housing. Skidplates under the servo and
transmission add protection.