In support of an official event 

The Museum will be closed Sunday, May 25
In addition, the Fourth Hangar will be closed Saturday, May 24

Guided tours of the 4th building, normally scheduled at 3:00 p.m. daily, are canceled through May 28.

Effective immediately, the William E. Boeing Presidential Gallery will have limited guest access due to scheduled event preparations. The only accessible exhibits during this time include: Douglas VC-54 Sacred Cow, Flying the President Exhibit, USAF Established Artifact. We anticipate full gallery access will resume by June 5, 2025.

Lawrance L-4S

Lawrance L-4S 60-hp air-cooled engine of the early 1920s was flight-tested in "Pony Blimp" airships as well as the Sperry "Messenger" airplane. It is typical of early-type radial engines that were developed following the demise of the rotary engine used during World War I.

Click here to return to the Early Years Gallery.