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1/8 Scale Electric Monster Truck:

Thunder-Tiger e-MTA - TTR 6403 (Radio Controlled Model)


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History, Info (and How To Set-up Tips) for the TT e-MTA:


  Introduced by Thunder Tiger circa 2009, the 4WD e-MTA Monster Truck - TTR 6403 F / A - was available ATR, or RTR with a brushless motor, ESC and radio system.

  The TT model was shaft driven, on a molded plastic chassis, with gear type differentials, coil spring over oil filled dampers, slipper clutch, universal joint drive-shafts and a full set of ball bearings.

Thunder-Tiger e-MTA
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  To race the TT e-MTA, you need to tweak and adjust all you can to give your car improved handling, stability and grip to ease around the curves and keep you on the track. One little setting change can transform your car into a world beater. Just follow our chart to attain the most favourable Set-up to suit your particular needs on any track.

  Learn what to look for when you search for the right Electric Motor for your e-MTA and achieve the best Gearing, for the best performance and put you on the winners rostrum.

  See how the highest level racers optimise and halve the friction of their Bearings with some easy to implement tips. Discover what you can do to avert Radio interference, and the optimum conditions to Charge your Batteries, to help keep them in good condition and give you excellent performance.









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★ Thunder Tiger e-MTA Chassis ★
Thunder Tiger e-MTA Chassis

★ Thunder Tiger e-MTA Chassis ★
Thunder Tiger e-MTA Chassis


Buying a Used Thunder-Tiger e-MTA
Monster Truck (and What to look for)


   Buying a used Thunder-Tiger e-MTA Electric Monster Truck, 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 Thunder-Tiger website, or purchased separately on eBay. With an instruction manual, any problems with your model Monster Truck you may discover can easily be fixed.

Dampers
   When you receive your used Thunder-Tiger Monster Truck, 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 Thunder-Tiger 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 Thunder-Tiger e-MTA 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 e-MTA 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 e-MTA Monster Truck model at a competitive level, I would also recommend you obtain and fit titanium pivot shafts, turnbuckles, tie rods and steering rods.

   The gearbox of your used Monster Truck 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 Monster Truck 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 Monster Truck 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 Monster Truck 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 e-MTA 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 Thunder-Tiger e-MTA 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 Thunder-Tiger Monster Truck 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 e-MTA model and good racing.


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


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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.





















★ TT e-MTA Chassis ★
Thunder-Tiger e-MTA Chassis


Hints and Tips

Soldering Battery Packs

   Nicad and Nimh batteries sometimes come as six separate matched 1.2 volt cells. These of course have to be soldered to each other in series to produce either a side by side stick pack, or a two times three cell saddle pack.

   Special copper, or silver plated straps must be used to make up these packs and each strap must be prepared before attempting to solder it to the battery cell, by placing a blob of solder at each end of all the straps needed.

   A jig to hold the cells vertical and side by side is advisable. Using electrical solder, with a flux core (flux aids the flow and adhesion of the solder) heat your soldering iron to as hot as it will go. Then with the stick of solder touching on the end of the cell, touch it with the iron. What you want it to spread evenly on the central part of the pole of the cell. Count to 3 seconds. If it doesn't melt the solder in that time, your iron is not hot enough. Battery cells are notoriously very fragile and susceptible to the very high temperatures soldering requires. Anything longer than four or five seconds direct contact with the iron can cause damage to the crystal structure in the cell, so be wary.

   When you have solder on each end of each cell, line them up in the jig, positive to negative and dab a spot of flux on the soldered cells, then position your straps, with the solder coated side faced down, touching the solder on the end of the cell. Now place your hot iron on the strap. Heat will transfer through the strap and melt the solder on the two faces. Again, count to 3 and you should feel the strap drop slightly as the solder fuses with the solder on the cell. Repeat this for each cell on both sides to produce your desired configuration. Finally solder your two wires, previously prepared with connectors, to the pack. Do not solder wires with bare ends to your pack. If these wires were to touch and short out, you could effectively kill your expensive battery pack I use Red for positive and Black for negative, but so long as you know which is which electrical equipment does not like the battery to be connected the wrong way.

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







Hints and Tips

Wings

   When you think of the Wing or the spoiler on any RC model car, you immediately think of down-force, but which wing is best for your model and what setting should it have?

   When you first build your car, most drivers will cut out the wing supplied in the kit, put it on the car and forget about it. It's only when the new kid at your local track, starts beating you that you begin thinking about changing a few things to make your car faster and one of the easiest changes you could make is to your wing.

   Choosing a wing for off-road can be confusing, so first of all you need to understand just what your wing can do for the way your car handles. Down-force equals traction and traction is what you need for controlled acceleration. The correct wing on your car can give you a good proportion of that down-force and if it has high side panels, it can also improve cornering and straight line stability.

   The first thing you need to consider when choosing your wing is the size. A small wing may not give as much down-force as a larger one, but it also weighs less and provides less speed restricting drag. So, if the track you will be racing on has good traction naturally and has nice long straights, a small wing may be an advantage. Large wings will obviously give you more down-force and on tracks with poor traction and short straights, will be the obvious choice. If rear end grip on cornering is also a problem, go for those high side panels as well.

   Tuning your wing angle can also improve the way it performs. A more acute angle will give you improved grip, but will also increase drag. If you go more flat with your wing, down-force is reduced, but drag is also reduced, so setting your wing angle is simply a matter of trial and error to suit your needs.

   The way the wing is mounted on your car must also be considered. If it uses a wire, it has a tendency to flex as it pushes down; this obviously flattens the angle as you speed along the straights, reducing drag, which could be good in some cases, but bad in others. If your wing is held by a rigid alloy or plastic support, the previous consideration is not a problem. Down-force is maintained as constant, but so is the drag.

   Changing and tuning things like your wing may seem futile if you are the big fish in a small pond and winning at your local track is not a problem. But if you ever go to the bigger ponds, its considering things like this that can keep you competitive.

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










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