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Welcome to

Coolspring Power Museum

Founded in 1985 - Celebrating Our 35th Year

Coolspring, Pennsylvania, USA

Our mission is to collect, preserve, and interpret historically significant and mechanically interesting early stationary internal combustion engines for the education and enjoyment of everyone.

Our Museum

Coolspring Power Museum presents an illuminating history of the evolution of internal combustion engine technology.  The museum's collection includes hundreds of stationary engines housed in more than 35 buildings and outdoor displays.

Stationary gas hit and miss engines, throttle governed engines, flame ignition engines, hot tube ignition engines, and hot air engines are all among the permanent exhibits at the Coolspring Power Museum in Coolspring, Pennsylvania.  Engines in the museum's collection range in size from fractional horsepower up to 600 horsepower.  Please see our Exhibits page which includes a number of Virtual Tours of the exhibits in the museum's collection.

Coolspring Power Museum is a 501(c)(3) nonprofit corporation founded in 1985.  Please see our Organization page for information regarding our officers, Board of Directors, and coordinators.

Our Vision

Our vision is to be the foremost collection of early internal combustion technology presented in an educational and visitor-oriented manner.  We strive to provide an organized and functional operation that will gain broad based support and generate substantial growth.

Visit Coolspring Power Museum - PLEASE SEE COVID-19

The museum is located in Coolspring, Pennsylvania, which is on Route 36 about halfway between Punxsutawney and Brookville.  Our Visitor Info page provides travel information for planning your visit to Coolspring Power Museum. There you will find local driving directions, access to maps of the area, airport information, and listings of restaurant and lodging options.

Touring the museum is both an "indoor" and an "outdoor" experience.  These resources provide information about the weather in our area:

    - DuBois/Punxsutawney weather forecast

    - Regional weather radar loop from State College

    - LightningMaps lightning activity (map is centered on the Coolspring area)

Be sure to visit our Coolspring page which presents a brief history of the village that is home to our museum.

Open Days and Special Events at Coolspring Power Museum

Museum Open Days and Special Events are scheduled to coincide with the third Saturday of the month from April through October.  Coolspring Power Museum is open for visitors during two days each month in April, May, July, August, and September.  The museum is open for visitors during three days each month in June and October.

Please see our Events page for the schedule of Open Days and Special Events and for admission details.  We offer special admission pricing for student groups, scout groups, and youth groups.  Please contact the museum for more information about group admission pricing.

Open Days give you the opportunity to experience the museum's many exhibits through informative tours led by our volunteers.  You may also create your own experience through a self-guided tour.

The museum hosts several Special Events during the year.

Exposition Car and Truck Show Fall Show

The Exposition & Flea Market celebrates engines and related artifacts brought to the museum by many exhibitors.  The Exposition occurs on June 17, 18, and 19, 2021.  It also includes a flea market with an eclectic assortment of items for sale.

The theme for the Exposition will be Miller 2021 featuring Miller engines and all engines built in Springfield, Ohio.  We will also be dedicating our 150 hp Miller engine.

The Antique Car, Truck & Tractor Show highlights classic cars, classic trucks, and antique tractors in an informal, casual day at the museum.  History Day showcases the exhibits of the museum with tours, demonstrations, and plenty of engine runs.  Both of these events occur on July 17, 2021.

The October Open & Swap Weekend brings together engine exhibitors and enthusiasts for three days of engine runs, technical discussions, and a bit of swapping and shopping.  The event occurs on October 15, 16, and 17, 2020.

We WILL NOT be holding the normal October Show this year.  Instead we will be holding October Open & Swap Weekend with field setup available.  We are making several procedural changes for this event to promote health safety during the pandemic.  Please read the guidelines we prepared for this year's event.

The Pennsylvania Department of Health has guidelines in place in Jefferson County, Pennsylvania, that limit the number of people that can be present on the museum grounds to 250.  Please stay informed as plans could change!  We reserve the right to cancel the event if an order is issued by the Pennsylvania Department of Health.  Please monitor the museum website for our current plans.

This Month at Coolspring Power Museum: October 2020

Coolspring Power Museum is open during three days this month for our October Open & Swap Weekend event.  Our Open Days are October 15, 16, and 17 (Thursday, Friday, and Saturday).  Please note that the museum will be closed on October 18 (Sunday).

Our hours on the Open Days are 7 a.m. to 8 p.m.

We WILL NOT be holding the normal October Show this year.  Instead we will be holding October Open & Swap Weekend with field setup available.  We are making several procedural changes for this event to promote health safety during the pandemic.  Please read the guidelines we prepared for this year's event.

We reserve the right to cancel the event if an order is issued by the Pennsylvania Department of Health. Please check the museum website or our Facebook page to be sure!

COVID-19: For everyone’s safety, all visitors and staff volunteers are currently required to practice social distancing and to wear face masks when on the Coolspring Power Museuem property.  For all clarifications and exceptions, please refer to the current official Pennsylvania Department of Health COVID-19 Guidelines.

The Officers of Coolspring Power Museum are monitoring the coronavirus situation.  As of now, our future Open Days and Special Events remain as previously scheduled.  As the situation continues to develop, and as our event dates draw nearer, we will review making changes to our schedule to best adhere to current local, state, and national guidelines.  We will keep the health of our visitors,  volunteers, and community our top priority.

Please monitor our website for notice of schedule changes.  If you have questions about our schedule of events, please utilize our Contact Information, below.

The Miller Improved Gas Engine Company, Volume 26 of our Bores & Strokes booklets, is available for over-the-counter purchase at the museum gift shop.  Author W. Norman Shade presents a history of the Miller Improved Gas Engine Company of Springfield, Ohio.  He then provides overviews of a number of Miller engines at Coolspring Power Museum. 

Electric Generation Engines, Volume 25 of Bores & Strokes, is now available for mail order.  Please see our Publications page for information regarding Bores & Strokes and other Coolspring Power Museum publications.

Ogden Publications also offers two volumes of Coolspring: Discovering America's Finest Antique Engine Museum as well as a DVD featuring many of the museum's engines.  These items are available directly from Ogden Publications.  Please see our Publications page for details.

E-Mail Updates From Coolspring Power Museum

Stay in touch with our many activities by joining our mailing list for E-mail updates from the museum.  You will receive information about our upcoming events and our current and future projects.  Please use our E-mail List Form to join.  Museum membership is NOT required to join the list.

In Progress at Coolspring Power Museum

  Susong Building  Susong Interior

Be sure to visit the Susong Building and the adjoining Preston Foster Hall for an excellent display of early engines.


Now Available from Coolspring Power Museum

Flame Ignition: A Historical Account of Flame Ignition in the Internal Combustion Engine by Wayne S. Grenning.  Flame IgnitionThis book is a scholarly work describing flame ignition as applied to reciprocating engines, from early experiments to later successes such as the Deutz and Crossley versions of the four stroke cycle perfected by Otto in 1876. Wayne discusses problems encountered by the early entrants into the gas engine industry, highlighting solutions discovered by the various players.  He also goes into more arcane subjects like the constant pressure cycle introduced by Brayton that survives today in the gas turbine engine, to a look at toy non-compression engines produced during the same early days as their full size brethren.  In eight chapters, Wayne shows details of engines built by Clerk, Sombart, Forest and others, gives technical details on the construction and operating features unique to flame ignition engines, and highlights the struggles other manufacturers endured to avoid infringing the Otto patents. The section on the four-stroke-cycle engines is by itself over 300 pages long, covering 30 different companies. It has 67 pages describing the activities of Crossley Brothers in Manchester, England and another 53 pages dedicated to Gasmotoren Fabrik Deutz from Cologne, Germany.

Regular hard bound edition, 875 pages, $79.95 + shipping and handling. Special leather bound edition, $149.95 + shipping and handling. Limited printing. The book is printed in color on semi-gloss paper for enhanced picture reproduction.  Book size is 8˝ x 11 inches with dust jacket.  Please see our Publications page for ordering information.

About the Author:  Wayne Grenning has been interested in engines for decades and has restored many early engines, flame ignition and otherwise, as well as creating operating scale and full size models of a variety of early flame ignition and non-compressing engines. A fixture at Coolspring during the shows, Wayne has gathered all of his knowledge together into this book as a technical and historical reference to this important chapter in internal combustion engine history.

The Coolspring Power Museum Collection

Internal combustion engines revolutionized the world around the turn of the 20th century in much the same way that steam engines did a century before.  One has only to imagine a coal-fired, steam-powered, airplane to realize how important internal combustion was to the industrialized world.  While the early stationary gas engines were more expensive than the equivalent steam engines, they did not require a boiler and were cheaper to operate.

The Coolspring Power Museum collection documents the early history of the internal combustion revolution.  Almost all of the critical components of today's engines have their origins in the period represented by the collection (as well as hundreds of innovations that are no longer used).  Some of the engines represent real engineering progress.  Others are more the product of inventive minds avoiding previous patents.  All tell a story.  There are few duplications in the collection and only a couple of manufacturers are represented by more than one or two examples.

The Coolspring Power Museum contains the largest collection of historically significant, early stationary gas engines in the country, if the not the world.  With the exception of a few items in the collection that were driven by the engines, such as compressors, pumps, and generators, and a few steam and hot air engines shown for comparison purposes, the collection contains only stationary internal combustion engines.

The collection consists mainly of stationary gas engines used in industrial applications.  There are only a few marine, automotive, and farm engines in the collection and the museum does not plan to expand its focus into those areas. Most of the museum's acquisitioning efforts (those that involve substantial expenditure of funds and volunteer time) have been focused on collecting important large stationary engines that most likely would be scrapped if the museum did not acquire them.

The museum's passive collecting efforts are directed at filling technological gaps in the collection by accepting donations from private collectors and occasionally other museums.  The museum also maintains a substantial library and archive related to the objects in the collection and to the internal combustion engine in general.  The Collection consists primarily of engines built in America because that is what was available to the museum.  However, the technology on which they are based comes from both sides of the Atlantic.

The American Society of Mechanical Engineers recognizes Coolspring Power Museum as a Mechanical Engineering Heritage Collection.  Please see our History page for more information.

Cam-Ron Video Productions prepared an installment of their Kaleidoscope The Series program showcasing Coolspring Power Museum.  This video gives a brief history of the museum, features a number of museum volunteers and visitors, and overviews a few of the museum's exhibits.

CPM Site

You may also view the video directly on YouTube.

Join the Coolspring Power Museum Friends Support Group

We encourage you to contribute to Coolspring Power Museum by becoming a member of our Friends Support Group.  As a Friend Member, you will receive a number of benefits from the museum.  We offer annual and lifetime Friend memberships.  Please see our Contribute page for more information.

Contribute to Coolspring Power Museum

Please support Coolspring Power Museum by providing a contribution to the museum.  Visit our Contribute page for more information.  The museum is a 501(c)(3) nonprofit organization and contributions are TAX DEDUCTIBLE to the extent allowed by law.

The Coolspring Power Museum volunteers are planning a new exhibit to feature our MAN air-blast injection diesel engine.  We need significant financial support to complete this project.

 MAN Nameplate  MAN Diesel Engine

Our goal is to bring this historic engine back to running condition for the education and enjoyment of our visitors.  Visit our MAN Project page for more information.  Please consider making a financial contribution to support the MAN project. 

Volunteer at Coolspring Power Museum

Coolspring Power Museum is an all-volunteer organization.  Our volunteers perform a wide variety of services at the museum and produce some truly amazing results.  Be a part of our volunteer staff!  We need your help during our June, July, and October Special Events and during our Open Days.  Please see our Volunteers page for more information about our volunteers program.  Also, see our Events page for the schedule of Open Days and Special Events at the museum.  Please contact us at 814-849-6883 or at cpm@coolspringpowermuseum.org to volunteer. 

Shop at Coolspring Power Museum

Be sure to stop at our Museum Gifts and Souvenirs Shop when you visit Coolspring Power Museum.  The gift shop offers a nice selection of Coolspring Power Museum apparel, print and video publications, and souvenirs.

We also offer a number of Coolspring Power Museum publications for sale by mail order.  In addition to the Flame Ignition book described above, we are offering The Snow Engine, a booklet that describes the history of Snow engines and gives a short history of Worthington engines.  We have reprints of The Ball Gas Engine catalog and we have copies of Cooper-Bessemer: 165 Years of Engine & Compressor Innovation, by W. Norman Shade.  In addition, we are offering back issues of our Bores & Strokes booklets.  Please see our Publications page for further information.

Proceeds from the gift shop and from our mail order sales provide valuable financial support for the museum's activities.

Contact Information

Coolspring Power Museum

179 Coolspring Road
Coolspring, PA  15730

Museum Contact E-mail: cpm@coolspringpowermuseum.org


Gift Shop:     giftshop@coolspringpowermuseum.org
Newsletter:   newsletter@coolspringpowermuseum.org
Webmaster:  webmaster@coolspringpowermuseum.org

Everyone is welcome to photograph, film, or
video record at Coolspring Power Museum for their
own non-commercial use.  Any photographing, filming, or
video recording for commercial use is prohibited without
permission of Coolspring Power Museum.


Copyright © 2020 by Coolspring Power Museum