Valve Adjustment Guides
Published 10 Sep 2017
 Pratt & Whitney Wasp Major Valve Adjustment Guide |
Radial engine cam rings typically have very large clearances between the rings and spigots upon which they rotate. This makes valve clearance adjustment tricky because the cam ring must be positioned in a predictable location during valve adjustment. Further complicating the valve adjustment process is the desire to complete the task with minimal engine rotation. Radial engine designers developed procedures that allowed accurate valve clearance adjustment to be accomplished while rotating the engine as little as possible. The data used for these procedures was usually presented as tables in maintenance publications, but were also published as quick-reference guides. Valve adjustment guides for Pratt & Whitney Twin Wasp, Double Wasp and Wasp Major engines are presented here, courtesy of Ted Koch. |
The remainder of this article is available only to AEHS Members. Please Login.
Send mail to
with questions or comments about this web site.
This website depends on cookies to make it function. If you continue to browse, scroll, click or otherwise interact, you are providing implicit acknowledgement of and agreement to this.
Copyright © 2002-2024 Aircraft Engine Historical Society