The Natrix 748 200mm car produced by Serpent in 1/10 scale Touring Car series AWD drivetrain assembly kit, is classified in R/C Models - On-Road - Touring Cars - Nitro Powered
Serpent Natrix 748 1/10 scale 4wd gaspowered 200mm car 4wd, belt-drive, gear-differentials
front and rear, Centax TM clutch, 2-speed gearbox, 75cc tank, chassis 7075-T6,
carbon radioplate and shocktowers, RCM-SS shocks, ball-raced anti-roll bars,
- Class: 200mm 1/10th Scale 200mm
- Chassis: 3mm aluminum, 7075 aerospace quality, CNC machined
- Suspension: Independent double wishbone suspension
- Radio plate: 2.5mm carbon fiber, CNC machined
- Shock absorbers: RCM SS shock absorbers
- Fuel tank: 75cc design
- Drive system: 4wd through kevlar reinforced timing belts
- Clutch system: Centax-True Motion clutch system
- Front axle: Gear Differential
- Rear axle: Gear Differential
- Gearbox: Lightweight SL6 2-speed with interchangeable fine pitch gears
- Weight: 1.595kg (depending on radio gear)
- Max. speed: 105km/h +
- Acceleration: 0-90km/h 3.0 seconds
- Instructions: Full color instruction manual, reference guide
- Not included: Engine and pipe, body, radio equipment, battery pack, tires
- The innovative steeringblock system, well proven on the WC winning Viper
977, is fully adjustable, allow for a leading, neutral or trailing position
and allow mounting of the optional carbon aero disks
- A new fueltank is designed, which sits even lower in the car as before,
and is long and narrow
- The lay-down servos are both seated in one composite holder, as close as
possible to the centerline of the car, creating a better overall balance and
enabling better rotation. The gas-throttle linkages are similar to the unit
used on the Viper 977
- A nice small and light receiver box is made, which seats very close to
the radio-tray and as much inboard as possible . On the radioplate a small
holder is fitted to accept the plugs of the battery, to act as on/off switch.
- The ballraced rear anti-roll bar is optimised position wise.
- The alumium rear brake and 2-speed shaft holders, which also hold the rear
anti-roll bar are lighter
- The new chassisplate allows the engine to be mounted more to the back as
before, resulting in a better overall balance. Therefor the rear and side
belt are new too.
- The rear uprights are modified to also accept the optional carbon aero disks
- The radioplate sits extremely low in the car, and it fitted in the rear
with a new type ballraced flexsystem, which an be used or locked in seconds.
- The lower radiotray made a new steering / servo saver assembly necessary,
again with adjustable ackermann inserts as before.
- On the front end the bumper is a larger low mounted unit with the carbon
- Overall the NATRIX car is lighter than 747 before, as also most aluminium
parts have been redesigned to loose weight.
Symmetrical chassisplate for even flex and torsion, in 7075 T6 aluminium, anodised
and laser engraved. Chamfered edges for more ground clearance when cornering and
countersunk holes. Central slots to mount weight, which can slide into the right
position and then secured.
The 2mm carbon fibre radioplate has multiple functions. It holds the fueltank
in place which is mounted on 3 alu posts in rubber. On the right hand side the
receiver mounts to a nicely shaped carbon fibre plate that connects to the radiotray,
sqeezed in right between belt and tank. The radioplate sits again lower on the
car , for lower center of gravity.
Central Flex system
The rear section of the radioplate incorporates a nice flex-control system.
It consists of 2 machined aluminium parts. The lower one connects to the radioplate
supports an the upper one with screws to the upper alu plate and radioplate.
You can either run the 748 rigid with flex . The optional ball-bearings and
screws are sold seperate. Testing has shown that flex in the center rear of
the car has the most effect and reacts most predictable as wel.
748 servo holder
A new composite servo holder is designed to have both servo closer to the center
line of the car and as low as possible. The 2 lay-down servo?s are seated very
close together and mount in a very efficent and easy way. The holder mounts
to the radio-tray.
The throttle / brake linkage is same style as used on the 977 1/8 car. A pivot-lever
system with an ingenius ball-cup system to the guide the wire and have almost
friction free action.
748 receiver box
The new composite receiver box is small but holds and protects the most common
modern receivers easily. The antenna mounts to the top. The box is securely
fastened to the radioplate with a nylon bracket . The box has been moved as
much to the inside as possible. On the radioplate a small holder is fitted to
accept the plugs of the battery, to act as on/off ?switch?.
Carbon fibre battery-holder positioned between the tank and pipe, for the best
weight balance. The battery is easy to strap down with tape to the bracket.
Spacers can be used to mount the battery higher or lower depending on the battery
you plan to use.
Lower and longer durable 75ccm nylon fueltank with transparent material to easy
see fuel-content. Large springloaded quick-fill cap with seal with large tank
opening for fast and easy refills. The bronze sintered filter will keep fuel
clean and make sure tank will empty till last drop if needed. Fueltank sits
very low in the car for low center of gravity. Fueltank is mounted with clips
on 3 alu posts with rubber buffers.
SuperShort RCM shocks
Coated threaded shockbodies in high quality aluminium. Supersmooth o-ring /
bushing package, to guide and seal the spring-steel piston rods. Precision moulded
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 shockabsorber
springs with color coding.
Front bumper and bodymount
Front bumper with aerodynamic effects and excellent protection. Some parts of
the lower bumper can be cut open to create more steering. Medium or small foam
bumper pad scan still be fitted as optional. The upper carbon fibre bodyplate
mounts to the front bumper with alu post and secures the front bdyposts
Superlow 3.0mm carbon fibre shocktowers with 3 positions for upper shockmounting.
In the centre you can mount the 3rd bodypost as needed.
A compact and superlight structure of topquality aluminium parts consist of
top-brackets, L and R equal bearing brackets, lower suspension bracket front.
The open style design allows for very fast parts exchange as needed, like belt,
diff or anti-roll bar.
Strong long double A-arm suspension with aluminium pivotballs, which pivot in
light nylon cups. Hard type composite arms. The arms pivot on the inside on
springsteel pins. The pivot-inserts are used to change rollcenter. Small grubscrews
mount in the upper bracket to control downstop. Easy to access and change ride
height, front width, toe-in, caster and camber.
Very strong composite steeringblocks with 2 ackermann positions, L and R use
the same . The steeringblocks feature inserts, which allow to change the kingpin
inclination to a leading or trailing position. The steeringblocks also allow
use of the optional carbon fibre aero disks to be mounted for less flex and
a more direct steering feel.
Wheelaxles / cvd
The spring-steel wheelaxles are seated in high speed bearings. The light and
durable spring-steel cvd?s bring all the power to the front wheels. Wheels are
mounted to orange anodised high grade aluminium hex-adaptors using flanged wheelnuts.
Anti-roll bar front
The ballraced wire type anti-rollbar in the front is really easy to access and
change for other type or thickness as needed. The anti-roll bar is linked to
the lower a-arms with a unique pivotball/cup system, which provides direct and
smooth operation and is easy to set and adjust.
Servo-saver / steering
The new lowered centraly mounted steel servo-saver post fits the spring-loaded
ballraced servo-saver system and steering. The inserts allow 2 ackermann settings.
Due to the open design the linkages with L/R threading can be reached easily.
The whole system allows for very precise steering and minimum bumpsteer.
Middle shaft holder
Machined 2 piece aluminium middle shaft holder, which securely holds the spring
steel middle shaft, and doubles up as holder of the pipe-mount.
Very rigid but open rear end design with a composition of machined alu brackets,
allowing for easy maintenance. The differential brackets, L and R equal, are
toothed and seat the excentric bearing holder, which allow for setting belttension.
Its very quick and easy to mount a differential and or replace a belt. The machined
aluminium lower suspension brackets have roll-center inserts with 3 positions
to choose from. The rear bracket is the narrow V1 version.
The 2-speed gearbox shaft holders, double up as anti-roll mounts, and brake
system basis. All topquality machined parts with anodising and laser-engraving.
the low mounted brake system with superlight disk allows for smooth and even
braking, and the open system avoids overheating. The ball-raced excenter and
lever gives a very smooth and direct brake-feeling.
Rear carbon shocktower and camber bracket
The low 3.0mm carbon shocktower has 3 upper mounting position for the shocks
and it mounts the body-posts. The camber bracket offers 8 positions to choose
from, 4 inner and 4 out holes. The shocktower is prepared to mount the extra
body-protectors, which are optional.
The Hard lower rear composite arms together with the updated uprights create
a wider set-up sweet-spot with more grip and more steering. The upper camber
rods connect to the carbon camber bracket with 8 mounting positions for roll-center
and the camber rod is easy to access and has L/R threading for fast changes.
The aluminium pivotball system allows for fast changes in width and toe-in.
On the lower inside the wishbone pivots on springsteel pins, which seat with
roll-center inserts in the anodised alu suspension brackets.
Lower rear wishbones
The hard composite lower wishbones feature a mounting position for the anti-roll
bar linkage which moves the link position more outside. Its also offers a mounting
position for an optional carbon shock-mount bracket, to move the lower shockmount
position further out, but for the default set-up its not needed. By placing
the lower shock further out, you will get even more steering .
Uprights / wheel-axles
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.
Rolll center chnages 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.
Wheelaxles and driveshaft
The durable spring steel wheelaxles combined with spring steel driveshafts bring
the power from the gear-diff to the wheels. Wheels are fitted on high grade
anodised alu wheelhex adaptors and secured with flanged wheelnuts.
Anti-roll bar rear
The ballraced wire type anti-rollbar in the rear is really easy to access from
the top and change for other type or thickness as needed. The anti-roll bar
is linked to the lower a-arms with a spring-steel rod.
Compact, durable and light gear differentials. Pecision moulded steel gears.
The very durable and light spring steel lightened diff-adaptors connect to the
driveshafts. Front and rear geardifferential are same, just different pullies.
Spring steel, light and very durable CVD?s used in the front. Precision mounted
hard steel pins
Spring steel, light and very durable dogbones used in the rear. Precision mounted
hard steel pins
Precision moulded super-true pullies, which feature holed sidewalls to let debris
move out easier. Light and durable.
Low friction Kevlar reinforced belts with fine pitch. Longlasting and smooth.
Ball raced belt-tensioner, machined from aluminium and can mount on top or below
The well proven SL6 gearbox is standard in the 748. Light and compact, with
very low rotating mass. Durable and longlasting gears. High quality bearings.
Very grippy springloaded 2-speed shoes, easy to set.
True Motion Centax clutch
Serpent invented the Centax clutch in the mid 90-ties, and all brands followed
it. Small improvements are found to make the original system even better. The
True Motion Centax has a flat flywheel, and the taper part on the pressure plate.
This allows the flyweights to work even better. The hard anodised aluminium
flywheel has 4 holes to have easy access to keep the flywheel in position when
setting the pre-tension. The flyweights are made of topquality teflon and feature
an additional hole to use grubscrews to make them heavier. The red friction
clutch shoe is very grippy, and works excellent with the steel clutch housing.
The hard anodised gears screw onto the threaded steel bell.
The light machined and anodised engine mounts perfectly seats the engine, well
alligned with the gearbox. Small adjustment can be made to move the engine closer
to the gearbox.