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Home RC Cars and Trucks Serpent Viper 977 Evo 35th Anniversary Edition
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Serpent Viper 977 Evo 35th Anniversary Edition

Serpent Viper 977 Evo 35th Anniversary EditionAfter first announcing the car a few weeks ago, Serpent officially unveils the Viper 977 Evo 35th Anniversary Edition! Features include all black anodized aluminum parts with machined edges, 35th Anniversary numbered logos laser engraved on the bottom of the chassis, new chassis stiffener, front and rear carbon fiber aero disks, brass chassis weight, aluminum servo saver set, carbon fiber transponder mount, aluminum wheel hexes and steel CVDs. The 35th Anniversary Viper 977 will also include a certificate of authenticity, laptop bag, baseball hat and USB memory stick. There will only be 350 of these cars produced with the very first model being placed on Ebay with all proceeds going to charity.

Chassis
5mm aluminum chassis in perfect symmetrical shape for even flex and weight distribution. Aerospace quality 7075 T6 aluminum with engraved logo. Improved stiffness around the engine for better engine performance. Countersunk holes, chamfered edges for more cornering, ground clearance. Space in center part of the chassis to allow mounting of brass sliding weights, which are used as set-up tool, to play with chassis balance. This has big influence on steering, grip and tire wear and is very easy and quick to change. All screws from the bottom are with 2.5mm allen size.

Bumper
The strong aerodynamic shaped composite bumper. The upward edges make it more stable, so these wont touch the surface under impact or with high temperatures. As extra feature offers removable inserts. Its very easy and quick to test with or without inserts in a matter of seconds

Steering
The steering block, which can be mounted left or right, offers a system to change the axle position more to front or back giving a “trailing” or “leading” steering, and the ability to change the kingpin-inclination and offset. The steering block features an aluminum plate to connect the steering-rods, 2 options for Ackermann. The spring-steel steering-rods are fastened to the aluminum steering plates, which mount to the new steering blocks. Optional carbon fiber disks can be mounted on the side of the uprights to stiffen the assembly and for aerodynamic reasons.

Front Suspension
The long durable front lower wishbones, are mounted super low in the car, and feature a semi covered “leg” for the inner suspension pin and the pivot link for the front anti-roll bar system, its also has an extension for the down-stop screw. The lower arms hold the lower aluminum shock mount plate, which allows a further out and higher mounting point for the front shocks. The strong upper arms in can be used left and right. The front lower arms connect to the aluminum front bracket on very low nylon holders. The kit includes 2 versions, wide and narrow. This whole system also enables you to replace a front driveshafts very quick and easy. The longer upper arms are mounted between the anodized aluminum top brackets, which also hold the suspension pin inserts to allow camber-change adjustments with 3 possible inserts. Below the aluminum top-brackets spacers can be used to change angle or height. Caster spacers are used as simple clips on the upper pivot pins. Same clips are also used on the lower pins to change wheelbase.

Front Sway Bar
The ball raced front anti-roll bar is a wire type, with very easy and fast open access on the front, captured in the aluminum front braces. The standard wire is 2.5mm and 2 other as options. The pivotballs link system directs the power to the bar in a smooth way and easy to adjust the tweak with the captured pivotball.

Front Axles
In the front the alu front axle with Japan-made one-way bearings features now an improved pulley assembly, free of play and super-true. Spring steel drive cups, strong, long and thin spring-steel driveshafts with CVD system, and ball raced springsteel wheel axles with aluminum quick-change levers. The open front end design allows for very fast and easy removal of the front axle or parts.

Servo Saver
The springloaded servo-saver allows easy and fast Ackermann settings. The servo-saver features a top mounted insert which can be used in 3 positions. Another 2 Ackermann positions on the steeringblocks.

Radio Plate
2.5mm carbon fibre radioplate with the the center flex-control system. The radio plate holds the fueltank, the receiver battery and the integrated electronics bracket/box, as well as the center flex system

Transponder Mount
The optional carbon transponder brace mounts to the integrated electronics brace. When using a small receiver, the box has space to hold the transponder too, but must be tested for function before the race. In our test it worked.

Fuel Tank
Low 125ccm fuel tank in a long and narrow design, with a premounted bronze filter. The narrow tank will ensure a better fuel-supply to the engine, as the fuel can move less from side to side. The labyrinth inside the fuel tank will also keep the fuel more stable and avoids foaming. The tank also has elevated sections in the front, which make sure the fuel stays close to the filter when the tank is almost empty. This creates like a warning signal a few seconds before the tank goes fully empty, so you can try to find a safer place to park. The fuel tank has a strong spring loaded cap and silicone rubber shaped seal, and has a connection for the pressure line. The inner bottom of the tank allows for mounting inserts to reduce volume if needed.

Pulleys
All the super round and true pullies have holes in the side flanges to allow dirt and dust to move out easier. The 977 has the latest pullies, with more teeth, so larger diameter which makes the belts run smoother, with less friction. The belts are low friction type as standard, rear one as 8mm, side in 6mm and front 6mm too. The adjustable ball raced belt-tensioner (carbon, aluminum) keeps the sidebelt running smooth.

Brakes
The brake is on the rear axle, next to the solid axle pulley. This reduces the inertia effect of the brake disc a lot because the rear axle spins much slower than the two speed shaft. Also the brake-stress on the rear belt is almost gone. It’s a very compact system and well protected against dirt, but still open enough to allow for sufficient cooling. The swimming ventilated brake-disk rotates on the rear axle and the spring loaded cam-operated brake pads will provide all the stopping power you may need. The race brake pad material is baked on strong steel plates and allows very precise braking with lots of brake-feel / feedback. Instead of a cable we opted for the well-proven wire-linkage of all Serpent cars. The ball raced brake activator is bolted in a light alu holder to the right rear bracket.

Rear Sway Bar
The ball raced rear anti-roll bar mount in steel adapters, which run in nylon spacers in the alu holders as integral part of the rear brackets, with 2.5mm as standard wire and 2 other as options. The anti-roll bar links to the rear lower arms with adjustable track rod guidance.

Rear Suspension
The long durable rear lower wishbones can be used left and right. The lower rear arm holds the low mounted link for the rear anti-roll bar and holds the aluminum mounting plate of the rear shocks, which allows a position which is very far to the rear and to the outside for best performance/ geometry. The lower arms also hold the easily accessible down-stop screws. Nylon clips are used on the lower rear pins to change wheelbase.

Rear Axles
The durable composite uprights hold the ball raced spring steel wheel axles, with aluminum quick-change levers. The 8.5mm pivot balls are used to adjust camber fast and easy with the smooth hex-shaped plugs. The arms of the floating body mount mount to the top of the uprights. On top of the up-right spacers can be added under the pivotball to change roll center and camber change. Optional carbon fibre disks can be mounted on the side of the uprights to stiffen the assembly and for aerodynamic reasons.

Gearbox
All the parts of the gearbox have been made smaller and as light as possible, still keeping durability on top of the list. The gears changed to a 0.9 pitch which is smoother than the original one. The Serpent gearbox system was our innovation in the late 80-ties and the system hardly changed, only optimized, and now as system in use with all other brands.

Clutch
The innovative Serpent True Motion Centax clutch is fitted. Serpent as inventor of the original centax clutch, has developed the clutch over the years and the current version excels in power throughput, reliability and ease of setting. The standard version comes with a steel clutch bell, red centax show and hard anodized clutch-gears.

Shocks
The shock absorbers are the latest Serpent RCM units with membranes. The threaded houses with setting-nuts ( o-ring inside) makes ride height changes easy and precise. he RCM shocks are very smooth, and easy to assemble and fill. The shock springs are selected, matched, flat grinded, color coded units, equal length front and rear.

Pictures

 
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