Yes, we are here!

In times like these our hobbies become lifesavers. At GAS ENGINE MAGAZINE and FARM COLLECTOR, we have been tracking down the most interesting and rare vintage farm machines and collections for more than 80 years combined! That includes researching and sourcing the best books on collectibles available anywhere. Our online store is open and we are here to answer any questions you might have. Our customer service staff is available Monday through Friday from 8a.m.-5p.m. CDT. We can be reached at 1-800-888-9098 or by email. Stay safe!

3/4-scale replica of 1867 1/2 HP Otto-Langen engine

Coolspring Spotlight

| June 2009

  • otto1
    Wayne Grenning's 3/4-scale replica of the 1867 1/2 HP Otto-Langen engine.
  • otto2

  • otto3

  • otto1
  • otto2
  • otto3

This is a 3/4-scale replica of the 1867 1/2 HP Otto-Langen engine, and is modeled after Nicolaus Otto & Eugene Langen’s exhibit at the 1867 Universal Exposition in Paris.

This engine design represents the first truly successful internal combustion engine that was produced in any significant number. Its unique characteristics include:  free piston (the main shaft is engaged to the piston by means of a rack and pinion arrangement), sprag clutch, flame ignition, atmospheric power stroke, dual slide valves and inverted configuration. It has a 4-inch bore and 27-inch stroke. The ionic column design depicted here was the initial engine appearance offered by the company. This design was used for a very short time and was later replaced by a less costly smooth-sided column.

Although more obscure than Otto’s famous 4-cycle engine design of 1876, this accomplishment marked a true turning point in the success of internal combustion engine design.

Wayne Grenning, Lockport, N.Y., built and owns this scale reproduction, which was finished in 2000. Over a decade of research and development went into its design and construction.  It has been on display at the Coolspring Power Museum since 2008.

Contact the Coolspring Power Museum at P.O. Box 19, Coolspring, PA 15730 • (814) 849-6883 • cool  


Gas Engine Magazine A_M 16Gas Engine Magazine is your best source for tractor and stationary gas engine information.  Subscribe and connect with more than 23,000 other gas engine collectors and build your knowledge, share your passion and search for parts, in the publication written by and for gas engine enthusiasts! Gas Engine Magazine brings you: restoration stories, company histories, and technical advice. Plus our Flywheel Forum column helps answer your engine inquiries!

Facebook YouTube


click me