Talk:Ursus C-45

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File:Ursus Darłowo 2009.JPG to appear as POTD soon

Hello! This is a note to let the editors of this article know that File:Ursus Darłowo 2009.JPG will be appearing as picture of the day on July 28, 2011. You can view and edit the POTD blurb at Template:POTD/2011-07-28. If this article needs any attention or maintenance, it would be preferable if that could be done before its appearance on the Main Page so Wikipedia doesn't look bad. :) Thanks! howcheng {chat} 22:56, 26 July 2011 (UTC)[reply]

Picture of the day

The Ursus C-451 was a popular model of tractor, manufactured by the Ursus Factory, based on the German Lanz Bulldog D9506. Production of the original model, the C-45, began in 1946, and was replaced by the improved C-451 in 1954. Ursus discontinued the model in 1959, and the design was then sold to Zakłady Mechaniczne in Gorzów Wielkopolski.Photo: Łukasz Golowanow & Maciek Hypś

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is the figure for the cylindre size correct. 10300cc. it seems awefully big. should it be 1300cc? Daiyounger (talk) 19:19, 28 July 2011 (UTC)[reply]

Kids, you are not old enough to know these tractors and the Lanz bulldog. They were still around in the early 50s. So I may convince you that they really had 6 liter and 10 liter one-cylinder engines. The cylinder had to be pre-heated with a blow-torch! (Or by making a wood fire under it!).

Related engines of that kind at the time would in addition even need a plug of saltpeter-phosphorus mixture coated cardboard inserted into a screw-top opening of the cylinder. This would act like a huge match head, giving an explosive flame. Then a decompression valve had to be opened. Then the engine had to be cranked by (strong) hands. It had I guess a 100 pounds flywheel. It was impossible to crank against the compression with a cylinder like a big bucket. Then the decompression valve had to be closed, once the flywheel was up to speed. Then the following happened: (decompression valve open) oooof- phhhhh- ooooof - phhhh - ooooof -phhhhh (now close decompression valve!) oooooomphhh...kabooom!!! (pyrotechnic ignition) - phhhhhhhhh (big black cloud)- kabooom-phhhh-kaboom-phhhh... Engine running. With every kaboom a cloud of black smoke with smoke rings around it coming from the exhaust! 70.137.129.130 (talk) 08:02, 29 July 2011 (UTC)[reply]