The 1/24th scale of the Tamtech family is perfect for indoor racing.
The specifications for a circuit for private use that allows for real competition with overtaking, cornering, braking to test cars and drivers are:
– a width of approximately 0,8…1,5 m,
– straights of around 8…20 m allowing these models to reach top speed,
– at least one chicane,
– at least one tight bend,
– at least one fast corner,
– right-hand and left-hand bends.
With these specifications it is possible to organise races for up to six model cars.
A circuit is characterised by its curves, which can be:
– slow (highlighted in red in the image); in order to tackle these curves it is necessary to brake to set the curve,
– medium (highlighted in orange in the picture); in order to negotiate these curves it is only necessary to take off the accelerator to slow down just enough to set the curve,
– fast (highlighted in green in the image); in order to negotiate the curve, you do not need to use the accelerator.
Curves are also characterised by constant (highlighted in purple on the right) or variable (highlighted in blue on the left) radii of curvature. Curves with varying radii of curvature are the most complex to deal with.
If you want to organise endurance races, you must provide a pit area where you can carry out maintenance on the vehicles, change batteries, change wheels… without getting in the way of those who are continuing to race. The pit area is highlighted in light blue in the image below.
To make competitions more interesting, it is better to create curcuits that allow different paths to be followed. In addition, races can always be run clockwise or anticlockwise to change the trajectories to be followed.
The space required for the above must be at least a square with a minimum side length of 3.6 m. Here are some examples of circuits that can be realised with their dimensions.
City circuit with fast bends, slow bends and pit area; total length 53 metres, lane width 1.5 metres, long side 18 metres and short side 9 metres.
Oval circuit with the possibility of having a second version with six very slow bends; total length of 23 metres, lane width of 0.85 metres, long side equal to 8 metres and short side equal to 3.6 metres
City circuit with slow bends, two chicanes and pit area; total length 32 metres, lane width 0.8 metres, long side 12 metres and short side 3.6 metres.
Square circuit for up to 4 model cars; total length 15 metres, lane width 0.8 metres, side 3.6 metres.
Very fast circuit, possible alternative solutions; total length 45 metres, lane width 1 metre, long side 10 metres and short side 5 metres.
Square layout; total length 30 metres, lane width 1 metre, side 5.5 metres.
Very technical circuit with possible alternative solutions; total length 35 metres, lane width 1 metre, long side 8 metres and short side 4.6 metres.
Technical circuit with possible conversion into an oval; total length 24 metres, lane width 1 metre, long side 8 metres and short side 4 metres..
Circuit construction can be done by delimiting the path using garden hose. The hose can be bent by shaping the curves, in the event of a collision it absorbs the impact without damaging the radio-controlled machines and can be fixed to the surface with simple adhesive tape.
With a 60 metre long hose it is possible to complete a circuit with a total length of 20…25 metres. It is possible to fix the rubber tube using nails or by securing it with tape as shown in the picture (the tube is highlighted in green, the tape is highlighted in light blue). Install a strip of tape every 30…40 cm.
When the circuit is permanent, instead of the rubber hose, a plastic profile with an H cross-section can be used. In DIY centres, 1-metre long plastic profiles with an H cross-section are available. By cutting out a wing (highlighted in red in the picture), you obtain a profile that serves the function of a guardrail: it is thicker at the bottom and is shaped to absorb shocks, deforming just enough so as not to damage the model, but then resumes its original shape. The profile thus modified can be bent to make curves; in the event that the curve has a very tight radius, use hair dryers to heat the profile to help fold the material. The profile can be fixed using strips of fabric glued to the plastic profile and fixed to the ground-base with nails or screws.
To join two H-section profiles, use wooden parallelepipeds that have the right dimensions to fit between the legs of the H. The wooden parallelepiped is highlighted in brown in the image and join the profile highlighted in grey with the one highlighted in blue. The sequence is highlighted in the image:
– the three separate pieces,
– the wooden piece is embedded in the first plastic profile in grey and then
– last step, the grey and blue pieces are joined together by the wooden piece.
To fix the system, the three parts can be glued together.
The road surface can be made of sheets of plywood, chipboard, plastic so that sections can be composed. The sheets can be covered with material to make it more or less smooth to reduce or increase the road holding of the models, making it more complicated or less difficult to control the cars in bends. Surfaces to avoid are turf, carpets and surfaces covered with fine sand that strain the electric motor and the electronic speed control unit.