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Tamiya Newman Porsche 956 (RM Mk-7) - 58052 (Radio Controlled Model Review)

1/12 Scale Electric Racing Car - RM Mk.7 Chassis:

  Released by Tamiya on September 19, 1985, the wonderfully detailed Newman Porsche 956, based on the Racing Master Mk.7 chassis, was re-released in 2012 (#58521).

  The rigid double deck FRP (Fiberglass Reinforced Plate) chassis is held together by six plastic pillars. The rear motor pod is secured to the cut away section of the lower deck that allows the FRP to flex and linked to the top deck by an un-dampened single spring over a rod. The front suspension is achieved by two small conical springs on top of the steering pivots. Six ball bearings also came in the kit.

Tamiya Newman Porsche 956 (RM Mk-7) - #58052 - 1:12 Electric Model

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  It was not the easiest car to drive. The RS-540S motor, 7.2v stick battery and servo operated speedo provided plenty of power for quick squirt straights but braking for corners required a deft touch.

  Like many Tamiya models the detailed body shell and Newman livery were superb. For some reason this model seems scarce and good quality comes at a cost.


Rating: 3.53.5 Stars out of 5 RCScrapyard



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Tamiya Newman Porsche 956 #58052 - Chassis
Tamiya Newman Porsche 956  #58052 Chassis
Tamiya Newman Porsche 956 #58052
Tamiya Newman Porsche 956  #58052 Body Shell

Buying a Used Radio Controlled Model
(General Information and Advice)


   There are essentially three reasons you might want to buy a used RC model; you may be a collector, looking to restore and display it; restore and sell for a profit; or simply restore and race an iconic vintage car. Personally, I used to get a buzz out of restoring an old clapped-out model, installing modern day electrics and maybe a few hop-ups, then showing the gang at our local club, just how competitive those old models could still be.

   Cheap, pre-loved bargain models, parts and spares are always coming up for sale, but once you have made your purchase, the one thing you will always need, is an instruction manual. If not supplied with your purchase, they can often be downloaded from the manufacturers website, or purchased separately on eBay. With an instruction manual, any problems with your model you may discover, can easily be fixed.

Make a General Visual Inspection

Dampers
   When you receive your used model, inspect 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.

   If your model comes 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.

Check the Body-Shell

   A broken, ripped or damaged bodyshell, can be easily repaired with rubber solution glue (I use Shoe Goo). Also, for added protection and if available for your model, fit an under guard to stop dirt and gravel entering the chassis.

Drive Shafts and Turnbuckles

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

   If you intend to race your model at a competitive level, for strength and weight reduction, I would also recommend you obtain and fit titanium pivot shafts, turnbuckles, tie rods and steering rods.

Examine the Drive System

   On gear driven models, open the gearbox 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, for racing 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.

   Drive Belt driven models need them checking at regular intervals for wear, tension and damage. If considered necessary, adjust the tensioning pulley until the belt can be depressed in the centre by no more than approximately 5mm. Also examine the drive pulleys for wear. The pulley 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.

Pinions and Spur Gears

Spur Gears
   Gears are a weakness on all 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 Nitro Engine or 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 problem, if possible, fit bolts with locking nuts to the mount, and remember to check them for security after every two or three runs.

Don't Neglect the Ball-Joints

   Ball joints always cause problems. For top level racing, all 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.

Steering Servo and Servo-Saver

Servo Gears
   The 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.

Don't Forget those Bearings

Ball Bearings
   If your used model comes with plastic or 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 by the previous owner with bushings installed, you may have to change all the axles and drive-shafts. For more information, take a look at my article, How to get the best from your Bearings.

   Finally, good luck with your RC model and good racing.

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Hints, Tips and Information

For Those New to RC


   For those starting in Radio Controlled Racing, I have prepared a number of articles with some useful Hints, Tips and Advice, based on my many years of experience in the sport.

   The categories include Battery information, Motor advice, ESC history, Servo choice, Setting your gears, Ball joints, plus many more.

   Entering the world of RC Racing can be a scary, so there are also articles relating to my own personal experience on entering the sport, and how, with determination and practice, you can progress to the higher levels of competition.

   To see the full list of our Radio Controlled Model Hints, Tips and Information, check out the list on the RC Scrapyard Homepage. ▶ ▶







Hints, Tips and Information

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)

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