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Message: <blockquote data-quote="sakuraguy" data-source="post: 1628166" data-attributes="member: 6441">Mazda Wankel Engine http://www.rotaryengineillustrated.com/images/RE4LIFE_top_ani.gif<a href="http://img427.imageshack.us/my.php?image=wankel1rq8.jpg" target="_blank">http://img427.imageshack.us/img427/7619/wankel1rq8.th.jpg</a>http://www.rotaryengineillustrated.com/images/RE4LIFE_top_ani.gif All Mazda Wankel "rotary" engines are essentially a single family - they all derive from the first Wankel experiments in the early 1960s. Over the years, displacement has been increased (somewhat), and turbocharging has been added to great effect. This is the engine family that made Mazda famous. In auto racing and for Japanese tax purposes, the displacement of Wankel engines is defined as the equivalent of 1.5 times the nominal displacement. So the 1.3 L 13B engines count as just under 2.0 L for these purposes. Wankel engines can be classified by their rotor size in terms of width (diameter) and depth (thickness). These metrics function similarly to the bore and stroke measurements of a piston engine. Nearly all Mazda production Wankel engines share a single rotor diameter: 105 mm (4.1 in) with a 15 mm (0.6 in) crankshaft offset. The only engine to diverge from this formula was the rare 13A, which used a 120 mm (4.7 in) diameter and 17.5 mm (0.7 in) offset. <a href="http://img427.imageshack.us/my.php?image=wankel1rq8.jpg" target="_blank">http://img427.imageshack.us/img427/7619/wankel1rq8.th.jpg</a></blockquote>

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PD Blast 14th July 2007

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