The Serpent 989E Viper is the latest Electric version of the 989. Electric racing has developed big time, the possible power is huge. Especially in the popular dragster class in the US the power going through the transmission is extreme. The 989E is designed to take care of that power and put it down as effective as possible. The 989E is based on the ultra-successful 989 gas racer and shares it’s suspension, shocks and quite a lot of other features like the chassis plate or the driveshafts
Power delivery starts with the batteries. We made room for serious power, 4S, 6S or more. There is plenty of space for them, still they are very low in the car.
Overview of the main specs
Symmetrical chassis plate optimised flex and
torsion, in 7075 T6 aluminium, anodised and
laser engraved. Chamfered edges for more
ground clearance when cornering and
•Low big bore shocks
Coated threaded shock bodies in high quality
aluminium. Supersmooth x-ring / machined
bushing package, to guide and seal the spring-
steel piston rods. Precision machined pistons
included in 3 types. Threaded pre-load
shocknuts in alu with O-ring inside. Light but
strong nylon spring-cups. Selected, matched
and paired shock absorber springs with colour
•Shocktower front & rear
The 3mm carbon fibre front and rear shocktower
with 2 positions for the front and 3 positions
for the rear for upper shock mounting.
Very strong composite steering blocks with 2
Ackermann positions, L and R use the same .
The steering blocks feature inserts, which
allow to change the kingpin inclination to a
leading or trailing position. The steering
blocks also allow use of the optional carbon
fibre aero disks to be mounted for less flex
and a more direct steering feel.
Durable medium type composite uprights, which
seat the wheel-axles bearings. The upright
offers the mounting position for the steel
camber-rod with L/R threading. Roll centre
changes can be made on top of the upright with
shims. The upright can be mounted with the
optional carbon fibre aero disks for more rear
grip and straight line stability.
•Wheel axles and driveshaft
The durable spring steel wheel axles combined
with spring steel driveshafts bring the power
to the wheels.
Precision moulded super-true pullies, which
feature holed sidewalls to let debris move out
easier. Light and durabele.
Low friction Kevlar reinforced belts with fine
pitch. Longlasting and smooth.
The 989 includes one sheet with Serpent
generic logos and one with 989 logos. Decals
are very thin material and come pre-cut.
Further down we changed to a super wide, 10mm rear belt. The power then goes through the solid rear axle which carries a n aluminium pulley as well
To avoid unwanted torsional flex, we created a “power box” around the motor, making this part of the chassis very stiff. To achieve this, the motor mounting plate is connected to the bearing-block of the spur gear shaft, to the chassis and to the mounting bracket of the topdeck
The topdeck is creating enough stiffness for the whole chassis and carries the receiver, steering-servo and belt tensioner
The elevated speedo mounting plate gives stiffness for the battery plates and creates also room for oversized speedos. Even 1-5 scale speedos fit, a very popular choice in the dragster racing scene
The batteries are mounted on a 2.5mm thick carbon plate. They can be mounted in 3 different positions, changing the CG to alter the cars behaviour