Overshadowed by later, bigger or sleeker types, such as the Ford Tri-Motor and Lockheed Electra, the pioneering mid-1920s work of Thomas Hamilton (assisted by James McDonnell) to develop an all-metal airliner proved that economics and customer comforts could be improved over wooden-framed aircraft. The H-45, powered by the Pratt & Whitney R-1340 Wasp, and higher-powered H-47, powered by Pratt’s R-1590 Hornet, found an enthusiastic home at Northwest, who dubbed the type “Silver Streak.” Two pilots and 6-8 passengers enjoyed a heated cabin and even an onboard toilet.
Starting in 1928, NWA flew two reliable H-45 and seven H-47 across its Midwest and Dakotas system, even fitting some with skis for winter conditions. The Metalplane was used to introduce service to Winnipeg, Manitoba in 1935. Northwest’s fleet was the largest in airline service and the last was finally retired in 1941.
If you use these photos, please credit the Northwest Airlines History Center – please also contact us to let us know how you’re using them and if we can be of further help!
