Historical
An early example of a "push-pull" aircraft was the Caproni Ca.1 which had two wing-mounted tractor propellers and one centre-mounted pusher propeller.
Claudius Dornier was the first aviation designer to heartily embrace the concept for production aircraft, as many of his flying boats used variations of the tandem "push-pull" engine layout :
- Dornier Wal (1922)
- Dornier Do X (1929)
- Dornier Do 18 (1935)
- Dornier Do 26 (1938)
Read more about this topic: Push-pull Configuration
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