13B Dimensions
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13B Dimensions
I am making a CAD drawing of a 13B, can anyone provide me with the following dimensions:
1. eccentricity (e)
2. radius of circle A (p)
3. radius of circle B (q)
4. length of arm from G to P (R)
as seen in this drawing by Kenichi Yamamoto:
http://www.nellump.net/peri/whatIs.html
Thanks
Andy
1. eccentricity (e)
2. radius of circle A (p)
3. radius of circle B (q)
4. length of arm from G to P (R)
as seen in this drawing by Kenichi Yamamoto:
http://www.nellump.net/peri/whatIs.html
Thanks
Andy
#2
Recovering Miataholic
Does this help? (From Wikipedia):
Wankel engines can be classified by their geometric size in terms of radius (rotor center to tip distance, also the median stator radius) and depth (rotor thickness), and offset (crank throw, eccentricity, also 1/4 the difference between stator's major and minor axes). These metrics function similarly to the bore and stroke measurements of a piston engine. Displacement is 3√3radius·offset·depth, multiplied with the number of rotors (note that this only counts a single face of each rotor as the entire rotor's displacement). Nearly all Mazda production Wankel engines share a single rotor radius, 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) rotor radius and 17.5 mm (0.7 in) crankshaft offset.
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Hm yes it may help, thanks. I may be able to extrapolate the measurement I need.
They are talking about the distance from the center of the rotor to the apex, I think Yamamoto's arm "R" is from the middle of the face through the diameter of the main bearing.
They are talking about the distance from the center of the rotor to the apex, I think Yamamoto's arm "R" is from the middle of the face through the diameter of the main bearing.
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10-17-20 03:25 PM
13b, bmw, cad, dimension, dimensions, drawing, eccentricity, image, mazda, measurements, rotary, rotor, s14, size, supercharged