Lunch Box / CW-01

This family takes its name from the first model that was released for sale; two models are equipped with the Lunch Box chassis:

– Lunch Box, model number 58063, released to sale in 1987 and available on the market until 1995
– Midnight Pumpkin, model number 58070, released to sale in 1987 and available on the market until 2004

Both models are equipped with Polystyrene body rich in detail. From 2005, the chassis changed its name to CW-01 with model number 58347 re-released as the Lunch Box.

There are several advertisements that Tamiya or the various importers around the world have published in trade magazines, in the image below is an example for the Lunch Box.

Parts list for Lunch Box model number 58063 3 for Midnight Pumpkin model number 58070:

The most obvious difference between the Lunch Box model and the Midnight Pumpkin model is the body.
The different body results in the only change between the two models in the chassis: the 4 different hooks that join the body to the chassis. In the picture the hooks of the Lunch box are highlighted in yellow and the hooks of the Midnight Pumpkin are highlighted in black.

The Lunch Box chassis is an evolution of the Pajero chassis that is sold under model number 58044. To improve the drivability of the Pajero chassis, the location of the battery has been modified by moving it to the lower part of the chassis to lower the centre of gravity.
The two chassis, Lunch Box and Pajero, share the front suspension system with its A-arms and the rigid axle rear suspension system on which the motor is installed with the differential case. These are the main characteristics of the Lunch Box chassis in reference to the Pajero chassis:

– the central chassis is made of plastic material (ABS) as a shell to protect the electronics from wheelsplash. It is derived directly from that of the Pajero,
– one shock absorber for each of the four wheels,
– the front suspension is independent and is the same as that installed on the Pajero and Grasshopper chassis,
– The Lunch Box chassis is not designed to perform stunts, so the batteries have been moved to the lower central part from the cantilevered rear where they are in the Pajero chassis. The pictures below show the Pajero chassis on the left, the centre and the Lunch Box chassis on the right. This change in battery position results in a different battery carrier system (highlighted in red) and a different front suspension mount (highlighted in blue).

– the rear axle is rigid and integrates the differential box; it is the same system installed on the Pajero and Grasshopper chassis; the ratios change to better handle the large diameter wheels.
The modification to house the battery in the lower part of the central shell also involves a difference in the two attachments to fix the rear axle to the chassis. The pictures below show the Pajero chassis on the left and the Lunch Box chassis on the right.
In the Lunch Box the point at which the rear axle hinges to the chassis has been modified (highlighted in blue for the Pajero and in red for the Lunch Box in the picture). Attaching the Lunch Box to the chassis allows a degree of freedom to be added to the movement of the motor – gearbox – rear axle system; a 95 mm long 4 mm diameter pin (highlighted in orange in the image) has been added that works inside the two plastic joints (highlighted in red in the image) modified to house the axle and counterbalance springs (highlighted in green in the image). In the Pajero the rear system can only rotate, in the Lunch Box it can rotate and move vertically cushioned by two metal springs as on Hornet model number 58045.
In the picture below, the free movements that the rear system can make are highlighted by the dotted arrows; the rear system of the Pajero can only rotate, the rear system of the Lunch Box can rotate and move downwards and upwards, absorbing bumps better.

– a fifth cantilevered rear wheel to handle any wheelies,
– the electric motor is the RS-540 model and
– the four large diameter wheels are isodiametric.

There are also other small parts in common between the Lunch box chassis and Pajero, in the pictures below the Pajero chassis is highlighted on the left and the Lunch box chassis on the right:

– brackets for the steering and mechanical speed control servos,

– the U-shaped support for the mechanical speed control system,

There are small differences between the Lunch Box and Pajero chassis, in the pictures below on the left the Pajero chassis and on the right the Lunch Box chassis:

– front T-attachment to lock the body onto the chassis for the Pajero model, which is completely missing in the Lunch Box chassis; highlighted in green in the picture.
– shape of the wing that in the Lunch Box does not extend to the front as on the Pajero; the wing of the Pajero is highlighted in red in the picture
– attachment to the shock absorber frame that is recessed in the Pajero and is raised in the Lunch Box to install shock absorbers with greater travel; highlighted in blue for the Pajero and in blue for the Lunch Box,
– there are other small modifications from the Pajero chassis to the Lunch Box chassis that were necessary in order to install the Lunch Box and Midnight Pumpkin body, which introduced four supports.

– Although the rear drive system and differential box is the same, the way the motor is installed and the gear ratio to handle the larger diameter wheels changes. In the pictures below on the left the Pajero chassis and in the middle photo and right the Lunch Box chassis with the spacer highlighted in red.

– The four shock absorbers and the arm installed on the differential case with the fifth wheel are different between the two chassis.

Re-release

The CW-01 chassis has been released for sale again since 2005 with different body:

– Midnight Pumpkin also in a special Metallic body version and a special Black version.

– Lunch Box also available in special versions Black with all-black body, Blue with all-blue body or Red with all-red body

– Unimog 406 in different colours: orange, blue green, yellow and red

– Montero which is the name of the Mitsubishi Pajero in America, is the same body as model 58044 modified for installation on the CW-01 chassis
– Pajero similar to the original model 58044 with Red colouring, in this case several improvements have been reintroduced compared to all previous models equipped with the Lunch Box / CW-01 chassis:
the four wheels are smaller in diameter
the tread pattern is different from that of all models released to date (2023) and are designed for rough and rocky terrain
the wheel rims are designed for this model
the shock absorbers are CVA II oil shocks as opposed to the simple spring shocks found on previous Luch Box / CW-01 chassis

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