RCScrapyard ► Iconic Vintage Radio Controlled (RC) Model Car Archive ► Schumacher Cat 2000 98 (Cat 98).
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1/10 Scale Electric Buggy:

Schumacher Cat 2000 98 (Cat 98) - U421D (Radio Controlled Model Review)


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History, Info (and How To Set-up Tips) for the Schumacher Cat 2000 98:


  Introduced in 1997, the 4WD Schumacher Cat 98, in my opinion, was the best in the Cat 2000 series.

  Basically, the car was a Cat 2000 EC with a new slim chassis, similar to that used on the SST 98 touring car, positioning a saddle pack battery on one side. Stick type batteries could be used with the addition of an adapter bolted to the chassis.

  The Cat 98 did have some success, finishing 2nd and 3rd overall in the 1997 World Championships.

Schumacher Cat 98 - 1:10 Electric RC Buggy
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  To race the Schumacher Cat 2000 98, it calls for fine tuning to attain better steering response and improve grip when cornering so you don't slide off the side of the track. Minute changes can make huge advancements. Our easy to understand list will show you how and lead you to the optimum Set-up to put you in front of the rest on the track.

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★ Schumacher Cat 98 ★
Schumacher Cat 98

★ Schumacher Cat 98 Chassis ★
Schumacher Cat 98 Chassis

★ Schumacher Cat 98 Chassis ★
Schumacher Cat 98 Chassis


Buying a Used Schumacher Cat 2000 Buggy (and What to look for)


   Buying a used Schumacher Cat 2000 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 Schumacher 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 Schumacher 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 Schumacher 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 Schumacher Cat 2000 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 Cat 2000 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 Cat 2000 Buggy model at a competitive level, I would also recommend you obtain and fit titanium pivot shafts, turnbuckles, tie rods and steering rods.

   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.

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 Cat 2000 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 Schumacher Cat 2000 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 Schumacher 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 Cat 2000 model and good racing.


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Manufacturers and Brands Catalogued and Listed by RC-Scrapyard.


   At present, the RC Model Manufacturers, Brands and Distributors covered by us are: ABC Hobby, Academy, Acme Racing, Agama Racing, Amewi, Ansmann Racing, ARRMA, Team Associated, Atomic RC, Axial, AYK, Bolink, BSD Racing, Capricorn, Carisma, Carson, Caster Racing, Cen, Corally, Custom Works, Durango, Duratrax, ECX - Electrix, Exceed RC, FG Modellsport, FS-Racing, FTX, Fujimi, Gmade, GS-Racing, Harm, HBX, Helion, Heng Long, Himoto Racing, Hirobo, Hitari, Hobao, Hong-Nor, Hot Bodies, HPI, HSP, Intech, Integy, Jamara, JQ Products, Kawada, Kyosho, Losi, LRP, Maisto, Mardave, Marui, Maverick, MCD Racing, Megatech, Mugen, New Bright, Nichimo, Nikko, Nkok, Ofna, Pro-Pulse, Protech, PTI, RC4WD, Redcat Racing, RJ-Speed, Robitronic, Schumacher, Seben, Serpent, Smartech, Sportwerks, Step-Up, Tamiya, Team-C Racing, Team Magic, Thunder Tiger, Tomy, Top Racing, Traxxas, Trinity, Tyco, Vaterra RC, Venom, VRX Racing, WLToys, X-Factory, Xmods, Xpress, Xray, XTM, Yankee RC, Yokomo, ZD Racing and Zipzaps.

   This is an ongoing project, with new and "lost in time" RC Model Brands being added as they are found and although most of those listed above have been covered in relative detail, some are still being researched and will be completed in the near future.


















Hints and Tips

Weight

   If you ever step up and enter a regional, national or international event in RC, you will find one specific rule concerning the weight of your car.

   At the time this article was written, the Minimum weight restrictions for 1:10 electric Touring Cars at different events, was between 1350g and 1500g. This includes your Motor, ESC, Receiver, Battery, Body Shell and the transponder.

   Out of the box you will find the majority of 1:10 Touring Cars, with everything onboard, are way over this Minimum weight and unless you are good enough to attract sponsors, getting your car down to anything approaching that minimum weight will be very expensive.

   There are things you can buy like micro ESC and Receivers. But Batteries and Motors are what they are and you have to work around them.

   To reduce the weight of your chassis, there are a number of things you can do. If the car you have is generally considered competitive enough, there are often carbon fibre main chassis, shock mounts and other alternative parts available, but they are expensive. And when the new version of your model comes out all the money you have spent is lost.

   The most cost effective weight reduction is the metal parts of your chassis. UJs, Drive and Pivot shafts and the like tend to vary from model to model, but turnbuckles can often be transferred and lengthened or shortened by using plastic ball connectors, so titanium is a consideration.

   Screw sets can also be transferred from car to car. Titanium screws and wheel nuts are always available, but there is a cheaper alternative Aluminium screws and nuts can reduce your cars weight cheaply, but be careful not to over-tighten them, aluminum is not as strong as titanium and can easily shear off if you are over zealous.

   Another weight reduction option is to drill holes along the base of the chassis. However, I do not recommend this. For one thing you are reducing the strength and making the chassis less rigid, but you are also raising the centre of gravity of your car, which can affect stability.

   If you do manage to get your car weight below the minimum allowed, this will give you an opportunity to add weight where you want it and lower the cars centre of gravity.

   One last tip: Knitting needles. When I first started in RC, money was tight and my dad came up with all kinds of ideas to reduce weight. He obtained a 3mm dye and found some of my mums old aluminum knitting needles that were just the right diameter. Having determined the length of the turnbuckles needed for my setup, he cut them to those lengths and threaded each end, so he could put plastic ball sockets on them. Adjusting them was a bit of a pain and they could be a bit fragile in crash situations, but they saved us lots of money over those early years.

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







Hints and Tips

Emergency Plastic Part Repairs

   It always happens when you least expect it. You are racing hard; and suddenly some idiot decides to side swipe you' and break your front wishbone. Even though you may carry spare parts for just about everything on your car, it always seems to be the same part that breaks and although you made a mental note the last time it happened to get a replacement you soon realise those mental notes were not worth the paper they are written on.

   So there you are, in the middle of nowhere with no spares. You ask around and no one has anything like your car, least of all parts for it and the closest model shop is 100 miles away. What are you supposed to do now?

   Some kind of repair is your only option.

   The one thing quite a few people think of first is superglue, but that kind of repair won't even get you around the first corner.

   What you need is something much stronger and the only way you can do that requires a good quality soldering iron, the plastic sprue (the bit left over when you remove all the parts for your car) or another broken part made from the same plastic.

   Using the largest tip you have, set the temperature so that it melts the plastic, but does not vaporise it. Place your broken part on a flat surface that will not be affected by the heat from the iron. I use the glass plate I have for setting the wheel camber of my model. Next, cut a piece of scrap plastic long enough for you to be able to hold on one end, as you work with it and place it over the break. At the point directly over the break, carefully melt the scrap plastic until it is around one millimetre above the break.

   Gently slide the iron sideways, depositing the scrap plastic about five millimetres either side and around the break. At each end of the fix, try to meld the scrap and broken part plastic. Picking up the broken part, continue the melding around each side of the break, then place it down the flat surface and repeat the process on the other side.

   When satisfied, switch off the iron and allow the plastic to cool. Using a modelling knife, carefully, cut away any excess plastic, but not too much.

   With a little practice a fix like this can be almost as strong as a new part and can save you a whole lot of anguish.

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










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