The New And Improved Unofficial R65 Forum V2

Technical Discussion => Discussion about "Lesser" makes, er, Non-BMW ;-) => Topic started by: Air4Life on May 17, 2013, 10:26:15 AM

Title: Boxer Engines
Post by: Air4Life on May 17, 2013, 10:26:15 AM

Is there a specific reason why the Ural 650 and 750 cc is inverted as opposed to the Boxers we are familiar with?


Ural engine: (https://bmwr65.org/smf/proxy.php?request=http%3A%2F%2Fwww.uralmiami.com%2Fimages%2Fboxer_engine.jpg&hash=9baf6f21bc1bf5a8f4ae4bd459745719c0ab4e75)

Title: Re: Boxer Engines
Post by: marcmax on May 17, 2013, 12:58:19 PM

It is probably because the design is a copy of an early BMW boxer which had the pushrods on top.

Title: Re: Boxer Engines
Post by: Barry on May 17, 2013, 01:48:59 PM

+1

BMW moved the camshaft from above the crankshaft to below it  with the introduction of the /5's. Usual reason cited is to improve ground clearance.

Title: Re: Boxer Engines
Post by: Air4Life on May 17, 2013, 02:07:42 PM

Quote

the design is a copy

Quote

...to improve ground clearance.

Yes. Thanks.