Tuning and a find !

http://www.aircraftinternational.com/catalog/motors/3w240i_b2_r/3w240ib2.htm This seems to propel many of the Cri Cris ! I had to lenghten the 3240 mm long version to 3340 mm to get the tail volumes right..looks better too. Frontal area is 0.92..old was ( high wing ) 0.96 m2..flat plate around 0,8-0,9 sq ft. This is very slick. --- Another cool engine; http://yuneeccouk.site.securepod.com/PowerMotor_Tech_spec.html