W
- Walter
- Walter Engines - Czech Republic
- Motorlet — Czech Republic
- Wankel
- Warner Aircraft — U.S.
- WASAG
- Welch
- Wells & Adams
- Werner
- West Engineering
- Western
- Westinghouse Electric Corporation
- Westinghouse — U.S.
- Whitehead
- Wickner
- Wiley Post
- Wilksch
- Krautter
- Robinson
- Williams
- Williams International — U.S.
- Wisconsin
- Wolseley Motors Limited — U.K.
- Wright Aeronautical
- Wright Company
- Wright-Gypsy
- Wright-Hisso
- Wright-Morehouse
- Wright-Siemens
- Wright-Tuttle
Read more about this topic: List Of Aircraft Engine Manufacturers