One museum, two locations
Visit us in Washington, DC and Chantilly, VA to explore hundreds of the world’s most significant objects in aviation and space history. Free timed-entry passes are required for the Museum in DC.
Visit
National Air and Space Museum in DC
Udvar-Hazy Center in VA
Plan a field trip
Plan a group visit
At the museum and online
Discover our exhibitions and participate in programs both in person or virtually.
What's On
Events
Exhibitions
IMAX and Planetarium
Dive deep into air and space
Browse our collections, stories, research, and on demand content.
Explore
Stories
Topics
Collections
On demand
For researchers
For teachers and parents
Bring the Air and Space Museum to your learners, wherever you are.
Learn
Programs
Learning resources
Plan a field trip
Educator professional development
Education monthly theme
Be the spark
Your support will help fund exhibitions, educational programming, and preservation efforts.
Give
Become a member
Wall of Honor
Ways to give
Host an Event
Engine, Lycoming R-680-9, Radial 9
Lycoming began as a subsidiary of the Auburn Auto Company, and the R-680 was a development version of its first 138 kW (185 hp) aircraft engine. It was one of a number of engines designed to replace the ubiquitous Curtiss OX-5 following World War I. The R-680 was type certificated in early-1930, and originally rated at 157 kW (210 shp). Considered a very reliable engine, more than 26,000 were built before production ended following World War II.
The R-680 powered the Stearman PT-13 primary American military trainer during the 1930s and 1940s, for which more than 2,000 engines were built. This model R-680-9 was an Army Air Forces engine that powered the Stinson L-1 and L-12, Curtiss AT-9/A, Beech AT-10, Stearman PT-9B, and Stinson CQ-2 aircraft.
Display Status
This object is not on display at the National Air and Space Museum. It is either on loan or in storage.
Object Details
Date
Circa 1940
Country of Origin
United States of America
Type
PROPULSION-Reciprocating & Rotary
Manufacturer
Lycoming (Williamsport, Pennsylvania)
Physical Description
Type: Reciprocating, 9 cylinders, radial, air-cooled
Power rating: 220 kW (295 hp) at 2,300 rpm
Displacement: 11.1 L (680 cu in)
Bore and Stroke: 117 mm (4.6 in.) X 114 mm (4.5 in.)
Weight: 248 kg (547 lb)
Dimensions
Approximate: 99.1 × 109.2 × 109.2cm (39 × 43 × 43 in.)
Storage: 134.6 × 132.7 × 162.6cm (53 in. × 52 1/4 in. × 64 in.)
Overall: 547lb. (248.1kg)
Other: 43 1/4 x 37 1/2in. (109.9 x 95.3cm)
Materials
Magnesium Alloy
Steel
Aluminum
Stainless Steel
Copper Alloy
Rubber
Paint
Phenolic Resin
Natural Fabric
Paper
Inventory Number
A19860279000
Credit Line
Gift of San Jose State University
Data Source
National Air and Space Museum
Restrictions & Rights
Usage conditions apply
For more information, visit the Smithsonians Terms of Use.
Stay up to date on the latest stories and events with our newsletter
Privacy
Terms of Use