Airfoil Drag Torque 
Vintage Aviation News
DECEMBER 5, 2024
In order to minimize the effects of torque on the aircraft, the Shiun was equipped with the MK4D variant of the Kasei engine, which was modified to accept contra-rotating two-bladed propellers. Additionally, the Shiun incorporated a laminar flow airfoil to reduce drag.
Plane and Pilot
OCTOBER 3, 2024
Another advantage of the counter-rotating props is the elimination of torque roll. This is the tendency to dig in the left tip float during takeoff while countering engine torque. The airfoil is a Harry Riblett shape, giving modernized flow separation on the leading edge for a soft stall yet with good lift and drag performance.
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