| Atkins Rotary Specialties Inc.: Supplying Mazda (RX7) rotary engines for installation in homebuilt aircraft. |
| Bayern-Chemie GmbH and Protac S.A.: Developer and manufacturer of rocket and airbreathing propulsion systems, including hypervelocity and special use engines. Site also provides company history and profile, news, review of technologies, and related links. |
| Compact Radial Engines: Manufactures and distributes radial, boxer and inline aircraft engines for experimental, PPG and ultralight aircraft. |
| Crossflow Aero Corporation: Converting Subaru automotive engines for experimental aircraft. [requires Flash] |
| DeltaHawk, Inc.: Designing a new two-stroke diesel engine aimed at the general aviation market. |
| Eggenfellner Aircraft LLC.: Producing firewall forward engine packages based on a Subaru automotive engine conversion. |
| EPI, Inc.: Design and development of piston engine technology and systems, specializing in aircraft V8 engines and propeller reduction gearboxes. |
| Firewall Forward: Manufacturer of Honda Civic based aircraft engines as well as propellor speed reduction units and ignition systems. |
| Franklin Aircraft Engines, Inc.: Manufacturer of light aircraft piston engines. |
| Kreisler Manufacturing Corporation: Manufactures precision metal components and assemblies for use in military and commercial aircraft engines. (Nasdaq: KRSL). |
| Limbach Flugmotoren: German manufacturer of the Limbach aircraft engine. [Flash required] |
| Mallen Research Corporation: ultra-efficient aeroengines for unmanned aerial vehicles and other performance-critical sectors. |
| MTU Aero Engines: Manufacturer providing development, production and maintenance services for civil and military aero engines and industrial gas turbines. |
| Pratt and Whitney: Leader in the design, manufacture, and support of turbine engines. |
| Progressive Air Services, Aircraft Engines and Parts: Aircraft engines, parts and accessories to worldwide market. |
| Simonini Flying: Two stroke engines for paramtors. |
| SWB Turbines Inc.: Developer of small air-breathing engines. |
| Textron Lycoming: Major manufacturer of general aviation piston engines. |
| Two Stroke International: Manufacturer of a line of lightweight engines for ultralight aircraft. |
| Universal Turbine Parts: Pratt and Whitney Canada approved supplier of PT6, JT15D, and PW100 engines and components. |
| Vertical Technologies: Manufacturer of turbine engines for aeronautical use. From Italy. |
| VW Engines: Producing the RG2000 aircraft engine along with associated accessories. |
| Willis Lease Finance Corporation: Acquires and provides commercial aircraft spare engines in the aftermarket and purchases and resells used and refurbished commercial aircraft engines and airframe and engine components. (Nasdaq: WLFC). |
| Zanzottera Engines: Manufacturer of engines designed for ultralight and unmanned aircraft. |
| Zoche Aero-Diesels: Developing type certificated, direct drive, air cooled, radial, two-stroke Diesel engine. |
Classical
