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Old 05-10-2014 | 09:59 PM
  #220  
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wmazz
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I found something interesting by accident and thought I would share.

PORTING DESIGN CHECK ON TWO-STROKE ENGINES

This small web site has an excel spread sheet download that calculates
port openings in degrees, time areas based on both Blair and Jennings, and
expected power output in Bar.

One way to measure ports that hasn't been mentioned is to use a magnetic
stand and a dial indicator to measure distance from BDC to port close. Although
you need to know the Bore, Stroke, and Rod Length.



We should make something similar and circulate it on RCTech.


Bill M.
Attached Thumbnails Click image for larger version Name: Spread Sheet.gif Views: 971 Size: 98.9 KB ID: 1195472   Click image for larger version Name: Time Area Graph for RC Engines.jpg Views: 1038 Size: 185.0 KB ID: 1195473  
Last edited by wmazz; 05-10-2014 at 10:14 PM.
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