Ranger 6-400C2 inverted, inline 6-cylinder 441 cuin 7.23 liter (1941) Aircraft engine - plaque - San Diego Air &amp; Space Museum Gillespie Field annex
<a href="//commons.wikimedia.org/wiki/User:Jim1138" title="User:Jim1138">Jim1138</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>