ever just want to fix a damn road? This would be the machine to get the job done, the twin Detroit Deisel engined Euclid TC12

Found on http://bangshift.com/general-news/motorized-freak-of-the-week-the-euclid-tc-12-bulldozer/

The machine weights about 35 tons and is powered by not one, but two 6-71 Detroit Diesels. The secret to the tractor’s power is the fact that each motor drove one side of the tracks. In the video clip  you can hear this thing in all its cantankerous glory. Those two-strokes certainly sound good when they are working hard.

The first version of this beast was built in 1953 after GM had acquired Euclid. Engineers figured out a way to join two Euclid C-6 bulldozers side by side and make one humongous machine. Everything was doubled. There were two motors, two Allison transmissions with torque converters, two hoods, two radiators, but only one operator.

the Martin Crocodile, 1924 Ford conversion for the US Army

Google translate says
Here's what you can do from simple binders kolkhoz "tin Lizzie" by the specialists of "Martin Rocking Fifth Wheel Company". What prompted the company engaged in semi- tracked transporter do not understand, but in 1924 the army experienced here this is their tracked products. However, native engine from Ford-T was replaced with the engine of the "lorry" Reo Speed ​​Wagon, there is not only a third more power (27.5 hp) and torque even at the expense of volume in nearly 4 liters - more suitable for crawler transporter. Moreover, there are at least two versions of the conveyor, as different body type (flatbed, with awning and hard ambulance wagon) and some small parts Coil. However ... However, judging by the complete lack of results and the development of ideas - anything they did not work.

found on http://strangernn.livejournal.com/930088.html#cutid1