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I didn't rather mean opencourseware, where there are only video lectures and pdfs with exercises. There's lack of interactive exercises, where you can test your knowledge and immediately get verification.

Hi! Programmers have possibly to learn and test theirs coding skills through websites like hackerrank, coderbyte and many others. Did you know any such site but for mechanical engineers? For example with strength of materials exercises, ranks, challenges.

Hi, I'm trying to understand modal analysis. In my example I have a fuel filter bracket (flat plate, four holes to bolt on the engine and four holes for fuel filter). I won't to know what are the natural frequencies. Should I attach the filter to the bracket to get the real values? But what...

My question is related to off-road machines. Why do transmission oil cooler, as a part of cooling package (engine water cooler, charge air cooler) is always located at the bottom of the cooling package? Is heat exchange at the bottom more efficient? In some article (unfortunately I can't find...

Yes, full size dozers (especially medium and heavy, up to 70 tons weigh). I'm not interested in tanks undercarriage.

Thanks, but I'm rather interested in books not short articles.

Hi, I'm looking for a books on the subject tracked undercarriage, especially bulldozer undercarriage design. I'm particularly interested in track frames, tensioning mechanisms, sprocket wheels, idler, rollers, tacked shoes, tracked chain etc. Thanks in advance.