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#1
September 2nd 10, 03:08 PM
posted to rec.aviation.military,rec.aviation.military.naval
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Push-Pull propeller combinations.
Several aircraft have been built with both a pull (or tractor)
propeller and a push (or rear) propeller aligned with each other. Supposedly the arrangment is inefficient, yet the some of the Dornier aircraft were record breakers. Given that some aircraft were ruined or delayed by the problem of combining gearboxes (He 177, Northrop XB-35 and if it ever came to it the B-29 with its backup V-3420) it looks like an attractive proposition. What's going on here? List of such aircraft: Cessna 337 Skymaster Rutan Model 76 Vogager Adam A500 Dornier Wal Dornier Do X Dornier Do 18 Seaplane, the German PPY Catalina. Dornier Do 26K Seaplane, possibly the longer ranged seaplane ever built. Dornier Do 335 Pfeil (arrow) perhaps one of the fastest piston engined aircraft ever built. Dornier Seawings Seastar, modern Seaplane of composites. Savoia-Marchetti S.55 LeO H-242 
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