13872315

Wall Art and Photo Gifts from Mary Evans Picture Library

13872315

Mary Evans Picture Library makes available wonderful images created for people to enjoy over the centuries

Media ID 32320280

© Aviation Ancestry

VISUAL DESCRIPTION
In this classic advertorial piece, we see an appeal made directly to aircraft owners suggesting they can improve performance by installing Napier's latest Series XI Lion engine—a powerhouse delivering 530 horsepower at high revolutions per minute (r.p.m.). Citing rigorous testing including a grueling endurance trial set by the British Air Ministry, it underscores reliability without part changes even at full power for extended periods—qualities paramount for commercial and service aircraft alike. Two case studies are presented: one involving military feats with Supermarine-Napier flying boats; another highlighting longevity on commercial service before overhaul needs—an endorsement of durability meant to entice potential customers seeking top-tier aerospace engineering.

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