28mm Coftyran Chyweethl Tractor and two crew.
The first Chyweethls were built in the late 1640s and a model of the Chyweethl has
been in service with the Coftyran Mechanical Corps ever since. The only thing the
modern design has in common with its older brethren is overall shape and the use
of the chained-pedrail system. There have been seven major revisions and countless
smaller revisions over the intervening 140 years.
As with most of Coftyr’s tractor designs the Chyweethl forgoes a turret and instead
uses the weight saved to mount a larger main gun. This requires the driver, commander
and gunner to train together constantly. The limited traverse of the main gun requires the
driver to assist in aiming by tweaking the throttles left and right to rotate the tractor.
The Chyweethl uses a chained-pedrail system for locomotion. The system benefits
from ease of maintenance in the field and excellent cross-country ability. However, the
system is extremely difficult to use on the newer paved roadways. Travel of just a few
miles on pavement will require replacement of most of the pedrails and causes serious
wear on the chained rail. This has made it difficult to strategically reposition Chyweethl
equipped units.
