Continuous track

**History of Continuous Tracks:**
– Sir George Cayley patented a continuous track in 1825.
– Józef Maria Hoene-Wroński designed caterpillar vehicles in the 1830s.
– Russian captain Dmitry Andreevich Zagryazhsky patented a mobile tracked carriage in 1837.
– Continuous tracks were demonstrated on the Heathcote Steam Plough in 1837.
– James Boydell patented the dreadnaught wheel in 1846.

**Innovations and Developments:**
– John Fowler filed British Patent No.1948 for an Endless Railway in 1858.
– Boydell patented the dreadnaught wheel in 1846.
– Russian Fyodor Blinov created a tracked wagon moved on endless rails in 1877.
– Frank Beamond designed caterpillar tracks and obtained patents in 1900 and 1907.
– Lombard Steam Log Hauler designed and patented in 1901.

**Commercial Success and Companies:**
– Alvin Orlando Lombard invented and implemented the first effective continuous track in 1901.
– Caterpillar Tractor Company founded in 1925 from a merger of Holt Manufacturing and C. L. Best Tractor Company.
– Holt introduced the Holt Model 40 Caterpillar in 1908.
– Various snow vehicles developed including ski slope grooming machines and snowmobiles.
– Linn delivered several units for military use between 1917 and 1946.

**Military Applications and Innovations:**
– Continuous track first applied to military vehicle on British tank Little Willie.
– Tanks inspired by Holt tractors in several countries.
– French and German tanks built on modified Holt running gear.
– German military vehicles in WWII had overlapping and interleaved road wheels for smoother ride and traction.
– Drive wheel in military vehicles is mounted well above the ground contact area.

**Advantages and Disadvantages of Continuous Tracks:**
– Tracks distribute vehicle weight over a larger area, reducing ground pressure.
– Tracked vehicles have better mobility over rough terrain than wheeled vehicles.
– Tracks provide superior traction for pushing or pulling large loads.
– All-steel tracks can cause damage to surfaces like lawns and gravel roads.
– Losing a single track segment immobilizes the entire vehicle.