Pratt & Whitney Double Wasp R2800 Anomaly

Started by rettir, December 28, 2020, 07:53:24 PM

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rettir

December 28, 2020, 07:53:24 PM
The above engine propels the Martin 404 & the Convair 440. Yet the noise certification differs on the respective aircraft. Stage 2 on the Martin; Stage 1 on the Convair.

Why?
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