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Welcome to

Coolspring Power Museum

Founded in 1985 - Celebrating Our 33rd 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 that put an end to the steam powered era.  The museum's collection includes over 275 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

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 at the museum 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.

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. Here you will find local driving directions, access to maps of the area, airport information, and listings of restaurant and lodging options.

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

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.  Please see our Events page for the schedule of Open Days and Special Events at the museum.

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 13, 14, and 15, 2019.  It also includes a flea market with an eclectic assortment of items for sale.

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 20, 2019.

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 Fall Exposition occurs on October 17, 18, and 19, 2019.

This Month at Coolspring Power Museum: December 2018

Coolspring Power Museum is closed for the winter.  Our next Open Days are April 20 and 21, 2019.  Please see our Events page for the 2019 schedule of activities at the museum.

In the most recent edition of The Flywheel, our online publication, Paul Harvey explores the history of the two-stroke cycle engine.

 Bessemer Two-Port Engine  Fairbanks-Morse Fire Pump with Waterman Engine

As you make your holiday gift list, please consider shopping by mail at Coolspring Power Museum.  We offer a number of publications for sale including Wayne Grennings' excellent book, Flame Ignition: A Historical Account of Flame Ignition in the Internal Combustion Engine, back issues of Bores & Strokes, and booklets about the Snow and Cooper-Bessemer engines.  Please see our Publications page for more information.

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.

Also, consider the gift of a membership in Coolspring Power Museum.  We offer several types of memberships.  Please see our Contribute page for more information.

In Progress at Coolspring Power Museum

Ship's Horn

In addition to the huge collection of engines, the museum often has fascinating artifacts on display that are not engine-related.  This device is a Clark Cooper ship's horn.  Fitted with a 17-inch diaphragm, it originally announced the considerable presence of the supertanker S.S. Brooklyn which dates to the early 1970s.  It works really well when fed compressed air from the Exley Station exhibit.


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.

Contribute to Coolspring Power Museum

Please support Coolspring Power Museum by becoming a Friend Member or by providing a contribution to the museum.  We offer annual and lifetime Friend memberships.  Please see our Contribute page for more information.  The museum is a 501(c)(3) nonprofit corporation and contributions are TAX DEDUCTIBLE to the extent allowed by law.

Preston Foster Hall is almost finished and we welcome additional contributions to complete this facility.  This fine addition to the museum features climate control and increased security.  Please consider a donation to this worthy project!

Susong Addition 20141224  Foster Hall 20150418

We also offer the option to donate via PayPal.  Click the Donate button below to begin your transaction.  Thank you for your support!

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

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

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


Copyright 2018 by Coolspring Power Museum