61 Propellers Brian Carpenter 10 years ago Advertisements Builders Guide 61 Propellers Propeller design for the Polini 250 Share this: Share on X (Opens in new window) X Share on Facebook (Opens in new window) Facebook Propeller design for the Polini 250DateMay 15, 2015Sterna PropellerDateJuly 19, 2016May 2015 Progress BlogDateMay 1, 2015
