RC Car Action - July 2013

Monocoque Suspension
All-new monocoque suspension arms are found
on all four corners and feature bolt-on covers that
increase strength and sti;ness while keeping dirt
out. Attached to each corner, the arms are held to the
ground by a set of aluminum-bodied, 16mm long-
travel shocks that are mated to 5mm aluminum
shock towers. A closer look at the inner arm mounts
reveals the level of tuning that HB o;ers both their
team drivers and their customers. ;e D812 includes
a full set of blocks that allow you to set both toe and
rake however you wish to dial it in. ;e overall sus-
pension system features aluminum hubs and steel
turnbuckles to keep it e;cient and lightweight.

18. 9 in. 480mm 12.9in.

(327mm)

Item no. : 109428
Scale: 1/8
Price: $520
Weight, as tested: 122 oz., 3,400g
VEHICLE SPECS

Chassis: 3mm aluminum plate

SUSPENSION
Type: Lower A-arm with adjustable upper camber link
Inboard camber link positions (F/R): 4/4
Outboard camber-link positions (F/R): 3/4
Shock positions, towers (F/R): 6/5
Shock positions, arms (F/R): 2/2

Shocks: ;readed 16mm aluminum body shocks with bladders

DRIVETRAIN
Type/ratio: Shaft drive with 4.4:1
Spur gear/pinion: 48T/16T
Slipper clutch: None
Di ;erential: Bevel gear, fluid filled
Driveshafts: Aluminum constant velocity style
Bearings: Metal-shielded

WHEELS & TIRES
Wheels: White dish style, 17mm hex
Tires: Not included
Inserts: Not included

ENGINE AND ACCESSORIES Engine: HB 21XZ-B Hara Edition Displacement: 3.49cc/.213ci Carburetor: Slide valve Pipe/header: O.S. T-2060SC Fuel Capacity: 125cc

36 RCCarAction.com

;e chassis on the D812 moves everything as close to the centerline as possible for optimum balance and handling. Out back you’ll notice the replaceable skidplate allows you to freshen up the chassis when things take a beating.

ALL-NEW MONOCOQUE SUSPENSION ARMS ARE FOUND ON ALL FOUR
CORNERS AND FEATURE BOLT-ON COVERS THAT INCREASE STRENGTH
AND STIFFNESS WHILE KEEPING DIRT OUT.

Low Rotating Mass Drivetrain Hot Bodies aimed to increase acceleration by lightening the entire drivetrain. Lightweight steel gears were used throughout the buggy and small diameter di; and pinion gears were selected (44/10) to keep the amount of mass down. Mated to the clutch bell, the center di; lines up the drivetrain straight down the middle of the chassis and transmits power to the front and rear through a pair of shafts. On both ends of the buggy, another fluid-filled, 4-gear di; spools the power out to the wheels and to the ground through a set of CV-style aluminum axles with captured boots that keep dirt out. ;e drive system as a whole is very free and spins easily, even by hand, due to its low rotating mass.