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Home RC Cars and Trucks Serpent Releases Full Cobra 811 2.0 Specs
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Serpent Releases Full Cobra 811 2.0 Specs

Serpent Cobra 811 2.0Just days after giving us a sneak peek of the new Cobra 811 2.0 1/8 scale buggy, Serpent has released the full specs on the car. As we mentioned earlier, the Serpent Cobra 811 2.0 has a completely revised rear end including a wider rear track thanks to longer suspension arms and drive shafts, longer suspension travel with the help of longer shock bodies and shafts, rear shocks relocated to the rear of the shock tower, new taller carbon fiber rear shock tower, and a ball bearing supported rear sway bar. Other updates include lexan mud guards mounted to the lower rear control arm, nylong mud scrappers mounted to the rear uprights, improved diff gears and larger bearings.

Chassis
Chassis in 3mm 7075 T6 aluminum , with machined pockets to create flex make lighter. Kick-up angle on front for stable landings. Countersunk holes. Slots to locate the front and rear suspension mounts precisely. Angled sides to increase stiffness. Laser engraved Cobra logo.

Bumper
Aligned with chassis kick-up for precise landings and to protect front suspension holde rand anti-roll bar.

Chassis stiffeners
Composite stiffener front and rear, to give extra stiffness, but still allow some flex as needed.

Central radio / servo mount
Composite radio box which offers good space for the steering and throttle -servo, the receiver and rx battery. The whole assembly including linkages can be taken off easily and fast in one go, when cleaning the car, or doing maintenance. One extra post is added close to the servo for stability.

Servo arms and linkages
The servo arms have a splined insert to have the right fit per brand. The linkages run very clean and tight and are easy to access to modify settings.

Suspension brackets
Beautifully machined 7065 T6 suspension brackets in anodized, laser angraved. Precision fit for the nylon roll center inserts and pivot balls / pins.

Steering block assembly
Composite steering blocks combined with 10 degree C-hubs for precise steering. Spring steel wheel-axles with large size bearings and larger inner with precision threaded aluminum wheel-hubs with offset . Flanged and serrated wheel nuts to guarantee that you will not loose a wheel nut in a race.

Front suspension
Durable oversized lower suspension arms in strong composite nylon. On the lower side the special shaped downstops screws are mounted. The lower shock-mounting pins are secured with a small grub screw from the bottom.

Front anti-roll bar
The ballraced front anti-roll bar system, consist of a spring steel bend wire, which is guided through the diff-cases and runs in ballraced steel adapters. The wire is linked to the lower suspension arm, with a captured adjustable threaded pivot ball, for very precise and low friction operation and easy tuning.

Shock tower and body mounts front
4.5mm thick carbon shock tower with 5 upper positioning holes for the shocks and and 6 holes for roll-center positions. 1 centrally located adjustable body mount , and 2 forward mounted adjustable body mounts, all with flip-tops.

Angled steering system / servo saver
The bell cranks are angled to reduce the angle of difference between the total caster and steering plane. Therefore you will have less bump steer and a truer steering Ackerman through the entire range of suspension

Ackerman plates
With the design of the steering bell cranks when changing the Ackerman you will not need to adjust your steering tie rods. You simply will only need to adjust your end points on your radio.

Rear suspension arms
Durable longer oversized lower suspension arms in strong composite nylon. On the lower side the special downstops screws are mounted. The lower shock-mounting pins are secured with a small grub screw from the bottom.

Mud-guards
Super light polycarbonate mud guards mount to the new lower suspension arms, and will keep dirt away from your anti-roll bars transmission and wheels.

Rear uprights assembly
Composite uprights with 3 upper roll-center positions. Strong steel track-rods with L/R threading and strong ball joints to pre-set camber. Spring steel wheel-axles with large size bearings and larger inner ones with precision threaded aluminum wheel-hubs with offset . Rubber dust covers in the rear to protect the cvd system and keep the lubrication inside. Flanged and serrated wheel nuts to guarantee that you will not loose a wheel nut in a race.

Mud scrapers
Composite mud scrapers which mount to the new uprights, and will keep the inside of your wheel cleaner in case of muddy conditons.

Rear anti-roll bar
The ballraced front anti-roll bar system, consist of a spring steel bend wire, which is guided through the diff-cases and runs in ballraced steel adapters. The wire is linked to the lower suspension arm, with a captured adjustable threaded pivot ball, for very precise and low friction operation.

Shock tower rear
4.5mm thick carbon shock tower, integrated into the rear section for extra stiffness, with 5 upper positioning holes for the shocks and 6 holes for roll-center positions.

Wing mount and body mounts rear
Composite rear wing, with strong nylon adjustable rear body mounts on wide body-support bridge located far enough to the rear, to support the bodies in best way.

Captured pivot pins and balls and bolted hinge pins
All spring-steel hinge pins are either captured or bolted in place and made in spring-steel quality. This insures your chances to finish an hour long main event, while battling for the lead. This relieves stress on the hinge pin when adjusting the kick up, or anti squat. Your pin is free to rotate to any angle without binding.

Shock absorbers big-bore 16mm
Hard Teflon coated threaded shock bodies with 4mm shock-rods. Hard anodized aluminum screw on shock-tops with Serpent laser engraving. Pre-load adjusters with o-rings inside. Shocks use large diameter membranes and large diameter o-rings and bushings to create a super smooth and leak-proof package. Large diameter pistons are held in place by a nut on the polished shock-rods tops. Open type spring retainer to let dirt out easy. The shock-shafts are protected by rubber boots.

RCM shock springs
Short type color coded shock springs are supplied for the 1st standard set-up Springs are ground flat top and bottom, and checked individually for tension and length.

Compact gear differentials
Very compact gear differentials with very smooth metal sintered gears, and steel shaft. Perfect sealing case with special gasket and o-rings. Very light and durable outdrive cups in spring-steel. Hardened spring-steel diff-coupler 10T with connector running in 2 oversized bearings . Drive ratio 4.3:1. This drive ratio will provide amazing acceleration combined with the low vehicle weight. It is a sure win, to help improve fuel mileage

Front and rear cvd sets
Both front and rear captured driveshafts are being used with CVD system. Durable yet light spring steel engraved driveshafts with hard steel pins.

Spring steel transmission parts
The front and rear thin but strong spring steel cardan shafts connect the differentials .

Throttle and brake lever ball cups
Helps provide consistent pulling on the brake lever or carburetor if you do not have the linkage perfectly aligned.

Piston Braking system
Provides more stopping power than you could have ever imagined before with a whole lot less servo power. Also is fully adjustable with 3 types of pistons, solid, O ring type, spring type. In turn you can adjust your bias or braking feel to your liking in more ways than ever before.

Fiber Glass disc brakes
Fiber Glass brake disks with oversized front disk.

Brake plate springs
Will keep the plates spread open to insure unwanted dragging of the brake discs.

Racing clutch 4 – shoe
Allows you to mix and match shoe materials evenly in pairs. Also provides more surface area contact to insure the engagement. 4 carbon shaped shoes are standard ( aluminum ones optional).

Coil exhaust wire and aluminum mount
Helps aid in the front to back movement of the pipe when chassis flex occurs. Helps prevent damage to your exhaust gaskets.

Engine mount
Machined 7075 T6 aluminum engine mount, with side cooling-fins.

Fuel tank 125cc
Splash basin on tank top, self centering Fuel tank seal, The fuel tank seal is angled to self guide its way into the bore of the tank. At the same time will provide a seal on the chamfered and flat edges of the seal, providing consistent engine performance from one pit stop to the next. Built in tank splash guard which helps prevent fuel from splashing onto your air filter in the event of an overly excited pit man.

Fueline and stoppers
Kit included top qualiity soft silicone fuel line to connect to tank, car and pipe, and also includes small composite stoppers to close yr fuel line when taking out tank, engine and or pipe.

Tank with swiveling nipple and floating clunk.
With the swiveling nipple you are able to adjust the angle at which you want you fuel line to travel. At the same time the floating clunk helps when you go upside down. The clunk by gravity will fall back into the fuel, utilizing the flexibility of the silicone fuel tubing.

Oversized Tank with adjustable volume.
With the insertion of a simple screw and volume reducer you can have ROAR, IFMAR and any other organizations legal tank volume.

Low profile air filter
Centralized air filter design to minimize cab width and height. Flexible rubber boot combined with strong nylon case to support the foam elements. Excellent dense foam airfilter elements to keep your engines clean inside.

Body
Serpent cab forward Avenger body, with film and masking tape is included in the kit.

Rear wing:
Low version strong rear white aero rear wing is included for great downforce and straight line stability.

Specs:

  • Wheelbase: 330mm
  • Width: 305mm
  • Weight: 3.300 grams ( race ready, depends on radio-gear and engine)
  • Clutch: 4-shoe centrifugal, carbon shoes
  • Shocks: 16mm big bore
  • Fuel Tank: 125ccm, with integrated bronze filter
  • Gear-Ratio: 4:3:1

 
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