Serpent Cobra 811 Version 2.0

Sep 25, 2012 No Comments by

Serpent Cobra 811 Buggy 2.0 1/8 4wd Cobra B 2.0 main new features – new wider rear end with new geometry for more rear traction and an easier handling car with wider sweet spot – rear shock absorbers moved to the back of the shock tower – longer rear shocks; with longer housing and shock rods for more travel – rear wing with integrated holders for the balanced rear anti-roll bar – longer rear lower arms, new higher carbon shock tower, longer rear shock, new upright – lexan mud-guards to mount on lower rear arms – nylon mud-scrapers mount on the rear uprights – improved differential gears – as already in the TE version : larger bearings in steering blocks and uprights 8X16X5 (2) and 15x21x4 (2), transmission using larger bearings 8x19x6 and 13x19x4 and new couplers for extra durability – includes Serpent Avenger cab forward body and mask The kit includes car, clear body with mask, 4 racing wheels, rear wing, decal and full color manual. The full package to compete in high end racing, finish finals and win !
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This new development for Cobra buggy is realized after another full year of racing across the globe, listening to feedback from many (team)-drivers and dedicated testing on many different surfaces. The feedback from the drivers on the Cobra Buggy in general is very good, the durability is rated as best in the market, the shocks are top-rated, and the diffs and drivetrain with new gears and larger bearings can now withstand any rigors and will last and last ! According to same drivers a more responsive rear end, combined with a bit more steering would bring the Cobra on the highest level.

Well, the changes as below accomplish just that, and for sure we will continue the superb quality on the kit overall and the new Avenger cab-forward body tops it off perfectly !

Box-art

Chassis plate

Chassis plate in 3mm 7075 T6 aluminum , with machined pockets to create flex make lighter. Kick-up angle on front for stabile 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 hole and 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 engraved. Precision fit for the nylon roll center inserts and pivot balls / pins.

Steering blocks assembly

Composite steering blocks combined with 10 dgr 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 lose a wheel nut in a race.

Front suspension

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

Front anti-roll bar

The balanced front anti-roll bar system, consist of a spring steel bend wire, which is guided through the diff-cases and runs in balanced steel adaptors. 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 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 down stops screws are mounted. The lower shock-mounting pins are secured with a small grubscrew from the bottom.

Mud-guards

Superlight 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 dustcovers in the rear to protect the cvd system and keep the lubrication inside. Flanged and serrated wheel nuts to guarantee that you will not lose 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 conditions.

Rear anti-roll bar

The balanced front anti-roll bar system, consist of a spring steel bend wire, which is guided through the diff-cases and runs in balanced steel adaptors. 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 grinded 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 carbon 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 un-wanted 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 ( alu ones optional).

Coil exhaust wire and alu 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.

Fuel line and stoppers

Kit included top-quality soft silicone fuel line to connect to tank, car and pipe, and also includes small composite stoppers to close your 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 air filter 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 down force and straight line stability.

Oils and grease

The shock-oil, diff oil and some grease is supplied to meet the standard set-up.

Manual and set-up

Full color manual with easy to follow assembly steps, exploded views for easy spares ordering, a blank and standard set-up sheet for a good start set-up.

Decals

Black and white promo body-decals ; Serpent generic and Cobra ones.

Packing

Parts are packed according to the steps explained in the manual.

Service and Support

The Serpent distributor, dealer or agent is your source for more info, but also the Serpent website and the member section and the YouTube channel provides lots of information.

Needed to complete the car:

  • radio and receiver
  • .21 gas-powered engine and pipe-set
  • fuel with 16% or 25% nitro and fuel bottle
  • wheels and tires
  • tools
  • paint
  • starter box, glow starter
  • charging equipment

#600008

Shipping middle of October 2012.

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If you like this article, check out this additional article on Serpent.

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Bringing you RC product news you can use on a daily basis as Car Action's Online News Editor. I have over 15 years of RC experience, plus a background in print and broadcast journalism, engineering, information technology, direct marketing, and even banking. Currently I enjoy racing 1/10 electric off-road, and have been bitten by the short course bug.
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