This rugged, 4-wheel-drive chassis from Dagu Electronics is a smaller version of the Wild Thumper 6WD chassis. It is designed to excel at traversing rough terrain, making it a great platform for any robot that needs to perform tasks in a complex outdoor environment. It features four powerful DC motors with brass brushes and 34:1 or 75:1 steel gearboxes that drive large (120mm diameter) spiked tires, and a unique “super-twist” suspension system acts to keep each wheel in contact with the ground for maximum traction, even when driving over uneven or bumpy surfaces. The suspension can be adjusted to suit different loads and conditions. The chassis is made from a 2mm-thick corrosion-resistant anodized aluminum plate, all of the nuts, bolts, and screws are stainless steel, and the brass fittings and suspension springs are nickel-plated.

Specifications:

Size: 280 × 300 × 130 mm (11" × 12" × 5")
Weight: 1.9 kg (4.1 lb)
Ground clearance: 60 mm (2.5") when lightly loaded
Recommended motor voltage: 2 V to 7.5 V
Stall current at 7.2 V: 6.6 A per motor
No-load current at 7.2 V: 420 mA per motor
No-load output shaft speed at 7.2 V:

350 RPM for the version with 34:1 gearboxes
160 RPM for the version with 75:1 gearboxes

Stall torque at 7.2 V:

5 kg-cm (70 oz-in) per motor for the version with 34:1 gearboxes
11 kg-cm (160 oz-in) per motor for the version with 75:1 gearboxes

Documents:

Modifying the Wild Thumper to use motors with encoders

Note: This is not an easy modification, and the chassis can be damaged if it is not done properly, so we generally recommend against it, and we can only provide very limited support for those who want to attempt it. The manufacturer did not intend for the chassis to be modified in this way, and we do not know how well such a modification will work out.

Warranty: