Logging Halftrack

[GJG]

Originally Posted by lynx42

Yes and No. The vehicle is a LINN Linn tractors were used to haul freight beyond the ends of the rail lines on some Canadian power projects. A flexible traction system, independent of each other, with a central triangle-shaped rocker using two tear-dropped runner blocks suspended by axles, an independent roller chain was used to disperse the load through these rollers, it was patented in 1918. The feature being with constant ground following traction. When the concept of rural snow plowing became accepted around 1920, Linn was one of the pioneers, with a v-plow and adjusting leveling wing design that was unmatched until better pneumatic tires, four-wheel-drive trucks and better highways appeared in the mid-1930s.

A new concept of a single machine able to switch from truck to tractor with the push of a lever appeared in 1938, known as the C5 or later trademarked term "CATRUK", but management and war priorities limited its development and it was abandoned after World War II. This machine was built in a cab-over configuration, front wheel drive, and a hydraulically lowered dual-wheeled tag-axle that would push the tracks up off the ground. "HAFTRAK" is another Linn trademark.

John Belfield has restored a C5 which was used by the American forces in WWII. It is believed that some of these vehicles were used by the US Navy during WWII for the recovery of landing craft.

Attachment 95726

Regards Rick.

Linn was one of the first customers of Lombard who made a "camper" halftrack for Linn. Very satisfied, Linn worked for Lombard as salesman demonstrating Lombard log hauler. He started his own company after patenting his track. The US Army was trying to develop a halftrack after WWI and, in 1936, they choose the Ford-Marmon-Herrington T-9 with it's front driven axle. But the US Navy did ordered some C-5 which was also front wheel drive; the transfer case could disconnect the tracks with the idle rear wheels down for faster speed on good roads (35 mph instead of 6 mph).
http://flinflonheritageproject.com/w...67/1038957.pdf