RCScrapyard ► Iconic Vintage Radio Controlled (RC) Model Car Archive ► Tamiya BMW 318i STW. ITEM #58516 TT-01 Type-E. (TT01E)
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Tamiya BMW 318i STW - #58516 (Radio Controlled Model Review)

1/10 Scale Electric Touring Car - TT-01E Chassis:

  Released by Tamiya on February 8, 2012, this TT-01E Chassis based, self assembly electric RC model is of the BMW 318i STW that won the German Super Touren Wagen Cup (STW) in 1995.

  The lightweight Lexan Polycarbonate body shell in this kit realistically replicates the distinctive BMW lines of the car. Warsteiner decals are provided in the kit.

Tamiya BMW 318i STW - #58516 TT-01E  - 1:10 Electric RC Touring Car
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  The budget priced 4WD shaft-driven TT-01 Type-E (E for Enhanced) bathtub frame provides for a low centre of gravity and superb balance. Four wheel double wishbone suspension with coil spring over friction shock absorbers, combine with front and rear orbital gear differentials to give excellent handling.

  A fibreglass reinforced nylon upper deck and gear covers go to improve the chassis rigidity and 3-piece track rods provide smooth responsive steering.

  Plastic and sintered brass bush type bearings come as standard with this model, that after a short while, when dust and grit get into them, actually wear into the metal drive shafts that spin in them. If you are building this kit to race seriously, these should be discarded and replaced by a full set of steel shielded ball bearings.

  To get the best from the Tamiya TT-01E Chassis, it needs to be fine tuned to hug the corners at high speed, without slipping off the track and accelerate smoothly under control. 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 BMW 318i STW #58516 TT-01E - Chassis
Tamiya BMW 318i STW #58516 TT-01E Chassis
Tamiya TT-01E Chassis
Tamiya TT-01E Chassis Front

Buying a Used Tamiya BMW 318i STW
Touring Car (and What to look for)


   Buying a used Tamiya BMW 318i STW Electric Touring Car, 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 Touring Car you may discover, can easily be fixed.

Dampers
   When you receive your used Tamiya Touring Car, 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 BMW 318i STW 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 BMW 318i STW 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 BMW 318i STW Touring Car 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 Touring Car 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 Touring Car 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 Touring Car 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 Touring Car 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 BMW 318i STW 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 BMW 318i STW 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 Touring Car 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 BMW 318i STW model and good racing.


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★ Tamiya BMW 318i STW #58516 TT-01 Type-E ★
Tamiya BMW 318i STW - #58516 TT-01 Type-E  - 1:10 Electric RC Touring Car


Hints and Tips

Tires for RC Models

Sponge (Foam) Tires:

   Sponge Tires can be purchased either pre mounted, glued and trued on the rims, or separately. Fitting the Tires onto the rims can be messy, so here are a few tips to make it a bit easier.
   If you are fitting new Tires on old rims, make sure the old sponge Tire is completely removed. To do this, I recommend using a wood lathe and apiece of wood, at least 300mm long and more than the width of your wheels, with medium grit emery paper stuck to it ... sand paper will also work, but emery is harder wearing ... This will also be used for truing a wheel. (Described later)

How to Mount and Glue Sponge Tires onto Wheels/Rims.

1/   Mount the Tires on the rims. Make sure they are reasonably tight on the rims, too loose and you might have problems.

2/   I find this to be easier if either in the lathe, or on the car itself. (but be careful with that glue)
  Using your thumb and forefinger, lift up the Tire off the rim, then using a small spatula or a thin piece of rigid wood or plastic dipped in glue (I recommend Evo-Stik, Impact Adhesive) slip it in the gap, making sure both the Tire and the rim are smeared. Then lower the Tire back onto the rim and press it down. Turn the Tire approximately 60 degrees and repeat.

3/   Depending on the width of the Tire you may need to repeat the process on the inside also.


How to True Sponge Tires.

   Truing Sponge Tires is essential if you are serious about racing competitively. To do this you will need the piece of wood, as described earlier and a good pair of vernier or digital calipers.
   Sponge Tires will always wear unevenly, weather you race on Carpet or Tarmac. The outside wheels will always end a race smaller than the ones on the inside, so after each race I recommend swapping them over (unless you are fortunate to have a new set for each race) and dont forget to adjust the steering trim on your transmitter before the next race.

1/   Before starting, check each mounted Tire for diameter and order them smallest to largest. Start with the smallest and mount it in the lathe.

2/   Make sure you are wearing safety glasses before you start this procedure: Lay the sanding wood under the Tire so that it can be pivoted up from behind onto the Tire. Start the lathe spinning, so that as you stand infront of the Tire, it is rotating downwards. Slowly lift the sanding wood and try to hold it ridged as it comes up against the Tire. There will be a high point on the Tire that if you hold the bat rigid enough will eventually wear down until the Tire appears completely concentric. at this point stop the lathe and measure the diameter on the inside and outside of the width. If needs be, repeat the process until satisfied.
Repeat for each Tire, matching them in pairs for diameter.
If considered necessary also trim the sides.


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



Information and Advice

Electronic Speed Controllers

History:

   ESC were originally developed to be used in conjunction with brushed 27T stock and modified motors in the late 1970s, early 1980s. Compared to modern day Controllers, they were Bulky and heavy, constructed using basic resistors, rheostats, capacitors and transistors, crammed together on a simple circuit board, to provide stepped but smooth acceleration when compared to the old mechanical, servo operated sweeper Speed Controllers. An Electronic Switch to change the direction of current flow was used on some of these early ESC to give reverse operation. Although they were a vast improvement on the old mechanical speedos of the time, they were expensive, jerky to control and prone to burn out if not carefully looked after.

   As new technology became available, improvements were slowly made and with the introduction of the new FET (Field Effect Transistors) and some basic mass produced silicon chips, ESC were made smaller and their reliability gradually improved.

   By the mid 1990s, "regenerative breaking" was developed. This meant that energy that would have been lost slowing down the car by effectively turning the motor into a generator, was harvested and put back into the battery. This of course was long before F1 had KERS (Kinetic Energy Recovery System) and adjustable anti lock breaking was introduced.

   Brushless Motors came to RC in the late 1990s early 2000s, which required a new breed of ESC to be developed to fully utilise the new technology. Ni-Cad Rechargeable Batteries were superseded by Ni-Mh and more recently Li-Po Batteries which provided higher Current output for the ESC to regulate. The latest ESC now use sensors to manage the motor and can be adjusted remotely to suit varying conditions.


Brushed Motor ESC.

   The "Silver Can" Stock Motors that come in a wide number of RC model kits are often accompanied by a 5 Amps to 20 Amps ESC. However, if you want to upgrade to a more powerful Modified Brushed Motor, 20 Amps may not be enough, so you will have to buy a something well over 20 Amps depending on the number of turns of your motor. As a rough guide, a 9 Single has a much higher current requirement than 20 Single.

Brushless Motor ESC.

   ESC for Brushless Motors are in no way compatible with brushed motors. The DC (Direct Current) input from the battery, on brushless ESC is transformed into three phase AC (Alternating Current). Each "phase" connecting three wires on the Brushless motor. By changing the frequency of the output wave the motor will spin faster for acceleration or slower for breaking. Reverse is simply achieved by changing over any two of the three "phases".
   At the time this article was written, Brushless ESC range from 3 Amps to around 300 Amps.
   For beginners I recommended you buy an ESC and Motor Combo, that way you can be sure the ESC Current rating is correct for the Motor.


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









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