Rotor Housing Dimensions
 

does anyone know where I can get a picture like this, but w/ dimensions (or an autocad drawing of the housing would be more than welcome)...

http://www.rotaryengineillustrated.c...orts-6pi-L.gif

^kick^

From Rotary Engine by Kenichi Yamamoto:

"The parallel trochoid curve is expressed by

x = e cos alpha + R cos alpha / 3 + a cos (alpha / 3 + delta)
y = e sin alpha + R sin alpha / 3 + a sin (alpha / 3 + delta)

where for a 13B,

e(mm) = 15.0
R(mm) = 102
a(mm) = 3
delta_max(degrees) = 26.2"

Because of the complex shape of the rotor housing, it's impossible to give you simple dimensions. Call your AutoCAD guru and tell him you've got a set of parametric equations that you need to feed in, and he should be able to help ya. :)

Brandon
BR7 Racing

Okay, here's a quickie I whipped up in MATLAB. It's using the dimensions for the 13B REW (R of 104mm) and all the dimensions are in mm. No ports on it though, sorry.

http://ham.and.cheese.on.rye.sandwic...atlabrotor.jpg

FWIW, all 13B engines have the properties I specified. :)

Brandon
BR7 Racing

http://robrobinette.com/sae_article.htm

"...In the three engines, these are E = 15 mm (0.6 in.) and R = 104 mm (4.1 in.)..."

Interesting.

According to the Yamamoto book, the generating radius is 102mm. But, according to SAE 920309 (the 4-rotor paper) and 950454 (the RENESIS paper), R = 105mm. I'll need to look up the apex seal height specs for the respective motors... since E is the same, I suspect that's from where the difference comes.

Brandon
BR7 Racing

resurrecting this, i would like the information in those broken links too