@SFOMuseum Twitter Posts Tagged earlyamericanmotorcycles This is SFO Museum's archive of the @SFOMuseum Twitter account. There are 42 posts and this is page 2 of 4. See all the tags or all the Twitter posts that have been archived so far.

“Early American Motorcycles” is on view pre-security in the Int'l Terminal and online at https://t.co/gk4H1rFqZs. Don't miss the online-only catalog! #EarlyAmericanMotorcycles This tweet was posted on June 03, 2021.

Improvements to twin-cylinder engines, such as the overhead valve arrangement on the 1914 Jefferson racer shown here, allowed riders to exceed 100 miles-per-hour on the largest tracks. #EarlyAmericanMotorcycles This tweet was posted on June 03, 2021.

Although that race was promoted to test the top speed the automobile, Oscar Hedstrom set the fastest time on an Indian motorcycle—a record of one minute and three seconds at an average speed of 57.35 miles-per-hour over the mile-long course. #EarlyAmericanMotorcycles This tweet was posted on June 03, 2021.

To no surprise, racing began almost as soon as motorcycles were created, and the first organized race was held in 1901 at Agriculture Park in LA. In 1903, motorcycles participated in the Winter Speed Carnival on the hard-packed sand of Ormond Beach, FL. #EarlyAmericanMotorcycles This tweet was posted on June 03, 2021.

“Early American Motorcycles” is on view pre-security in the International Terminal Main Hall and online at https://t.co/gk4H1rFqZs #EarlyAmericanMotorcycles This tweet was posted on May 21, 2021.

With consistent improvements, the engines increased their power output and decreased in weight over the next few years. Curtiss raced extensively to promote the company and garnered numerous records and wins. #EarlyAmericanMotorcycles This tweet was posted on May 21, 2021.

After the Curtiss Double Cylinder engine was adapted for airships, he received an order in 1906 from the U.S. War Department, which stated the Curtiss engines developed “a greater amount of power to the pound than any other known source of energy.” #EarlyAmericanMotorcycles This tweet was posted on May 21, 2021.

In 1903, Curtiss introduced one of the first two-cylinder motorcycle engines, a powerful five-horsepower, V-Twin design that boasted a greater power-to-weight ratio than a comparable single-cylinder engine. #EarlyAmericanMotorcycles This tweet was posted on May 21, 2021.

Motorcycling and aviation legend Glenn Hammond Curtiss was born #OnThisDay in 1878. Before turning to aviation, he designed a series of innovative and influential single- and double-cylinder engines for his pioneering motorcycles. #EarlyAmericanMotorcycles This tweet was posted on May 21, 2021.

Production of Excelsior motorcycles continued until 1931, when Schwinn refocused on marketing bicycles to a Depression-era public. “Early American Motorcycles” is on view pre-security in the Int'l Terminal and online at https://t.co/gk4H1rFqZs #EarlyAmericanMotorcycles This tweet was posted on May 10, 2021.

Excelsior was one of the “Big Three” American motorcycle brands during the 1910s, along with Harley-Davidson and Indian. Like other motorcycle makers, Excelsior had deep roots in bicycling. Their first model used a Thor engine built under license. #EarlyAmericanMotorcycles This tweet was posted on May 10, 2021.

“Early American Motorcycles” is on view pre-security in the International Terminal Main Hall and online at https://t.co/gk4H1rFqZs #EarlyAmericanMotorcycles This tweet was posted on April 26, 2021.