Twin Tri-Pacer custom side-by-side double engined Tri-Pacer. Largest image size available.
Also known as the Wagner Twin 2, Wagner Twin Tri-Pacer, and Wagner Pacer 125, this was a standard PA-22 fitted with two 125 hp Lycoming O-290-D engines mounted side-by-side. The conversion was produced in three weeks by Harold Wagner from Portland, Oregon. To clear the two overlapping propellers the left engine shaft was fitted with a 4.75 in (121 mm) extension. After 100 hours testing, the aircraft was converted back to its original configuration.
Casting a giant propellor GIF
Propeller feathering - GIF
Those props obviously have to be counter-rotating... I wonder what they used to keep them in sync. (chain, belt or direct gear drive?). It sure doesn't appear like there's much clearance between the tip of the propeller and the adjacent hub.
Edit: If I would have paid attention, I'd have noticed the pitch of the propellers were identical.
Last edited by IAMSatisfied; 09-03-2019 at 08:31 AM.
Last edited by volodar; 09-04-2019 at 08:54 AM.
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