http://www.classicairboats.com/Counter-Rotator.html =hard to belive...(not differential!)? BTW=in "auer" we have symmetrical gear (little forces on axle...) "6,000 rpm is common in automobile " =only crankshaft bearing 6000, athers 4000 ...
Airplane Wanted Easy Riser kit or wreckage or at least the airfoil
