...on the CERMARK website:
http://www.cermark.com/products/COMI...ne-Engine.html
Initial data (not official) with XOAR wood props
18 x 8 => 8,100 RPM
19 x 8 => 7,600 RPM
20 x 8 => 7,100 RPM
MLD-35S (side muffler system)
MLD-35R (rear or pitts muffler system)
I think Stiffy had his with 2 hours of fuel through it. He tached his at 7,300 RPM with 20 x 8 JXF wood prop. However, I am comfortable with the original and more conservative reading of 7,100 RPM.
Peace,
Steven Chao,
CERMARK