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Old 06-30-2019, 04:20 PM
  #308  
LtMash1A
 
Join Date: Feb 2015
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Originally Posted by ForcesR
This diagram was posted in RC Groups a while ago. The FG90 R3 engine is 250mm diameter, or 9.84 inches diameter, or 9 - 27/32" diameter.

UMS 75 CC. Diameter: 9 inches
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