CPM Logo

Welcome to

Coolspring Power Museum

Founded in 1985 - Celebrating Our 36th 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

    - National Weather Service radar

    - 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 16, 17, and 18, 2022.  It also includes a flea market with an eclectic assortment of items for sale.

The theme for the Exposition will be Stover and Related Equipment.  All Stover engines or equipment will be welcome to the Exposition.

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 16, 2022.

The Fall Exposition & Swap Meet 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 13, 14, and 15, 2022.

This Month at Coolspring Power Museum: December 2021

The museum is currently closed for the winter.  Our next Open Days will be April 16 and 17, 2022.  If you have questions about the museum or need information during our off-season, please utilize our Contact Information, below.

COVID-19: For everyone’s safety, all visitors and staff volunteers are currently requested to practice social distancing when on the Coolspring Power Museum property.  The use of face coverings is optional.  For all clarifications and exceptions, please refer to the current official Pennsylvania Department of Health Guidelines.

The Officers of Coolspring Power Museum are monitoring the COVID-19 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.

In the December edition of The Flywheel, Paul Harvey tells the story of a great building that was donated to the museum.

Roaring Run Station  Roaring Run November 2020

In the December Extra edition of The Flywheel, Paul completes his trilogy on the construction of the Air-Blast Injection Engine exhibit now known as "Diesel Centrale CPM."

  Diesel Centrale Logo

The Greatest Show on Earth: The History of Coolspring Power Museum 1958 to 2020, Volume 27 of our Bores & Strokes booklets, is available for over-the-counter purchase at the museum gift shop.  Author W. Norman Shade presents this detailed history, which includes contributions from many of the individuals who worked diligently to make Coolspring Power Museum the powerhouse organization it is today.  Illustrated with many photos, it includes a catalog of engines and equipment currently in the museum's collection.

When you visit Coolspring Power Museum consider making a short side trip to see the Greenberg Cadillac Museum, which houses a collection of more than 70 Cadillac automobiles.  Located in nearby Brookville, the Greenberg Cadillac Museum will be open during our Exposition & Flea Market days this month.

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

The new building for the MAN/Air-Blast Injection engine exhibit recently received its concrete floor.

ABI Floor

We're making progress on the MAN/Air-Blast Injection engine exhibit.  See our MAN Project page for the latest information on this exciting new exhibit.

The museum is offering for sale a professionally-produced photograph of our MAN engine at Coolspring Power Museum.  The photograph is available on our MAN Photos page.  Please join us in our enthusiasm for this project, support the project, and follow our progress!


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 and to follow our progress.  Please consider making a financial contribution to support the MAN project.

Support the MAN project by purchasing Coolspring Power Museum beverage mugs, hats, and shirts.  We have a number of items for sale online through our affiliation with Sew Vivid Designs.

CPM ABI Merchandise

Please visit the Sew Vivid Designs CPM Merchandise Page for information on products and to place orders.

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 © 2021 by Coolspring Power Museum