An Allison V-1710-115 aircraft engine on static display at the Classic Jets Fighter Museum at Parafield Airport in Adelaide, South Australia. This is the type of engine used in the P-38, P-39, P-40, and P-51A aircraft.
<a href="//commons.wikimedia.org/wiki/User:Peripitus" title="User:Peripitus">Peripitus</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>