RCScrapyard ► Iconic Vintage Radio Controlled (RC) Model Car Archive ► Tamiya XB Sand Viper. ITEM: # 57755 DT-02
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Tamiya XB Sand Viper - # 57755 (Radio Controlled Model)

1/10 Scale Electric Buggy - DT-02 Chassis:

  Released by Tamiya on July 29, 2006, the 2WD XB Sand Viper (#57755) is No.55 in the RTR Pre-Assembled Expert Built Series, based on a budget DT-02 chassis. The original Tamiya Sand Viper kit (#58374) was also introduced in July 2006.

  A pre-painted lexan bodyshell, a 540 motor and radio system are included, but may require a battery, charger and speed controller to complete (specifications differ from country to country).

Tamiya XB Sand Viper - DT-02 # 57755

  The model is based on a molded plastic chassis, with a gear type differential, coil spring over oil filled dampers, dogbone drive-shafts and a full set of ball bearings.

  To get the best from the Tamiya XB Sand Viper, it needs to be fine tuned to handle jumps under control and has enough grip to hug the corners at high speed, without slipping off the track. Small adjustments can make a Big difference and our simple to understand, step by step procedure, will guide you to the best Set-up for your driving style.


      Rating: 44 Stars out of 5 Reviewed by: RCScrapyard     Manual.





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Tamiya XB Sand Viper - DT-02 Chassis
Tamiya DT-02 Chassis

Tamiya XB Sand Viper - DT-02 Chassis
Tamiya DT-02 Chassis

Tamiya XB Sand Viper - DT-02 Chassis
Tamiya DT-02 Chassis


Buying a Used Tamiya Sand Viper
Buggy (and What to look for)


   Buying a used Tamiya Sand Viper Electric Buggy, or any used RC Model, has a number of advantages. It is generally cheaper than new, ready built and may come with a variety of expensive hop-ups already installed. Cheap, pre-loved bargains are always becoming available. However, depending on the age of your purchase, it may need a little tender loving care before you can take it out on the back yard.

   The one thing you will always need is an instruction manual. If not supplied with your purchase, they can often be downloaded from the Tamiya website, or purchased separately on eBay. With an instruction manual, any problems with your model Buggy you may discover can easily be fixed.

Dampers
   When you receive your used Tamiya Buggy, make a general visual inspection of the chassis, front and rear wishbones, suspension shock towers etc, for any broken parts that may need to be replaced. Then, take a screwdriver and box spanner and check each self tapping screw and nut for security, taking care not to over tighten.

   Next, for those Tamiya models with oil filled shock absorbers, remove them from the chassis and dismantle the coil springs. The damper shafts should push in and pull out with a smooth action. If you feel a jolt as you change direction, this means the oil has leaked out and must be topped up. At the same time, change the O-Ring seals to prevent more leakage. Also check the damper shafts for damage. If they are scratched, change them as soon as possible.

   If the body shell of your Tamiya Sand Viper is broken, ripped or damaged in any way, this can be easily repaired with rubber solution glue. Also, for added protection and if available for your Sand Viper model, fit an under guard to stop dirt and gravel entering the chassis.

Titanium Turnbuckles
   Examine the drive shafts for wear and replace as required. If possible, change them for titanium. The steel shafts wear and bend too easily.

   If you intend to race your Sand Viper Buggy model at a competitive level, I would also recommend you obtain and fit titanium pivot shafts, turnbuckles, tie rods and steering rods.

   On Belt driven models, the Drive Belts need checking at regular intervals for wear, tension and damage. If deemed necessary, adjust the tensioning pulley until the belt can be depressed in the centre by no more than around 5mm. If the belt was slack, also examine the drive pulleys for wear. The teeth should provide a well seated fit for the belt teeth and not be rounded on the corners. If the belt teeth do not fit snugly, change the pulleys as soon as possible. For top level racing it may be prudent to replace all belts and pulleys after each race meeting.

   For Gear driven models, the gearbox of your used Buggy should be opened up to check for gear wear and lubrication. A thin coat of grease is often used on internal gears and although this is fine for basic running around on the back yard, if you intend to race your Buggy at a higher level, this should be removed and replaced with racing oil (ZX1 or Teflon Oil). Of course, this should be reapplied after each race meeting.

Spur Gears
   Gears are a weakness on all Buggy RC models. Head on collisions can easily damage the gear teeth on nylon and plastic spur gears. Heavy impacts can also loosen the nuts or self tapping screws that hold the Electric motor in Position, allowing the pinion gear to pull out of mesh slightly and rip the tops off the teeth on your spur gear. To minimise this possibility, fit bolts with locking nuts to the Electric motor mount and remember to check them for security after every two or three runs.

   Ball joints always cause problems. For top level Electric Buggy racing, the plastic ball connectors should be checked and if deemed necessary, changed after every meeting. A simple thing like a loose fitting connector popping off, could easily end your race, so better safe than sorry.

Servo Gears
   The Sand Viper steering servo is also prone to damage. In high speed crash situations, the fragile gear teeth of the servo can be broken off, rendering your expensive servo useless, so be sure to obtain a good quality "Servo Saver". Check out my Servo Information article.

   If body roll on your Tamiya Sand Viper is a problem, handling can be improved with the use of stabilizers, anti roll or sway bars, stiffer tuning springs and, or, thicker silicone oil in the dampers.

Ball Bearings
   If your used Tamiya Buggy comes with plastic and sintered brass bushings (ring type bearings), check the shafts that run in them for wear. Dust and grit can get into these bearings and abrade the shafts. Therefore, you should replace them all with shielded ball bearings. If the model has been run with ring type bearings, you may have to change all the axles and driveshafts. For more information, take a look at my article, How to get the best from your Bearings.

   Finally, good luck with your Sand Viper model and good racing.


For More on how to Setup your Buggy, check out my Hints and Tips page.














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Hints and Tips

Getting into RC

   When I first got into racing RC, all I had was a three year old clapped out Tamiya Boomerang, a silver can stock motor, three step mechanical speed controller, two 1400Mah stick batteries and basic Acoms stick transmitter.

   I was the newbie and most of the guys I was racing against had all the latest models, modified motors, matched batteries and top spec radio equipment, but I was still beating them easily. Why? The answer is simple: Practice. I had been driving that old car around my back yard and in the local park for almost three years. The others bought their cars only a few weeks or months earlier and had pestered their parents for the latest and most expensive car, motor etc, but did not have the experience to be able to control it. While I was steadily trundling around the track, they were crashing out on every other corner, popping ball joints, breaking wishbones and generally causing havoc.

   The moral of this story is all too obvious and anyone starting up in RC who wants to race please take note. You don't need the best equipment to win races. You can start with a cheap basic kit and with a lot of practice in some wide open spaces where you will not cause any damage, learn how to control your car. Remember don't try to run before you can walk. Stick with that silver can motor for a while and upgrade to something a little faster only when you have mastered the old one. You don't even have to buy new. If you go down to your local RC Club, there are always cars for sale. They may be battered and bruised, but if you get an old brushed silver can motor, a cheap 5A ESC, a couple of Nicad, or Nimh batteries, charger and simple radio gear, that is all you need to start practising and after a while, winning races.

For More Setup Information check out my Hints and Tips page.







Hints and Tips

Slipper Clutch and Hydra-Drive

   More often installed on off road RC Models, the Slipper Clutch has been around since the late 1990s. Basically the idea is to prevent wheel spin and increase traction under acceleration, to improve the cars stability from a standing start, when landing from jumps or on corner exits. It also protects the spur gear and drivetrain, to some degree, when using a high torque motor.

   The design is quite simple, employing two independent metal plates, one generally fixed to the spur gear and the other to the drive mechanism, clamping onto a fibre or rubber ring or pad. Adjustment is commonly achieved by slackening or tightening a spring loaded nut on the end of the spur gear mount.

   Setting up the slipper clutch can take some time and is a matter of individual preference, but normally the way to do this is from a standing start, jamming on the throttle and simply getting the feel of the car for that particular surface, being grass, gravel or dust. Personally I adjust it to give me around a metre and a half slip, before it achieves full drive. Wear on the slipper clutch is natural and often has to be readjusted after each race.

The Hydra-Drive


   The Hydra-Drive, or Fluid Coupling design was actually designed in the 1950s, but only came to RC a couple of years after the introduction of the slipper clutch. In principle, the Hydra-Drive is supposed to give similar results to the slipper clutch but need less continuous adjustment. In practice, for me anyway, it was not easy to live with.

   Hydra-Drives employ two independent impellers, immersed in silicone oil and enclosed in a sealed housing. Again, like the slipper clutch, one impeller is fixed to the spur gear, the other the drive. As power is applied, the spur gear will spin its impeller, until through the oil, drive is picked up by the drive impellor. The only real way to adjust the drive was to change the oil viscosity, or in some, the gap between the impellers could be adjusted by shims. All this took time and as far as I am aware, the Hydra-Drive is no longer used in RC.

For More Setup Information check out my Hints and Tips page.








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