A worker atop the left engine of a <a href="https://en.wikipedia.org/wiki/Douglas_C-47_Skytrain" class="extiw" title="w:Douglas C-47 Skytrain">Douglas C-47 Skytrain</a> transport airplane at <a href="https://en.wikipedia.org/wiki/Douglas_Aircraft_Company" class="extiw" title="w:Douglas Aircraft Company">Douglas Aircraft Company</a>'s plant in <a href="https://en.wikipedia.org/wiki/Long_Beach,_California" class="extiw" title="w:Long Beach, California">Long Beach, California</a>. The engine, which is exposed without its usual <a href="https://en.wikipedia.org/wiki/cowling" class="extiw" title="w:cowling">cowling</a>, is a <a href="https://en.wikipedia.org/wiki/Pratt_%26_Whitney_R-1830_Twin_Wasp" class="extiw" title="w:Pratt &amp; Whitney R-1830 Twin Wasp">Pratt &amp; Whitney R-1830 Twin Wasp</a>, a 14-cylinder air-cooled <a href="https://en.wikipedia.org/wiki/radial_engine" class="extiw" title="w:radial engine">radial engine</a> of 1,200 horsepower (890 kW), and is fitted with a <a href="https://en.wikipedia.org/wiki/Hamilton_Standard" class="extiw" title="w:Hamilton Standard">Hamilton Standard Hydromatic</a> <a href="https://en.wikipedia.org/wiki/Feathering_(propeller)" class="extiw" title="w:Feathering (propeller)">full-feathering</a> <a href="https://en.wikipedia.org/wiki/constant-speed_propeller" class="extiw" title="w:constant-speed propeller">constant-speed propeller</a>.
<i>Original title:</i> Flexible performance of C-47 transport planes is due in part to their two 1,200 horsepower radial engines and to their three-blade variable-pitch propellers, Long Beach, Calif. Picture taken at the Douglas Aircraft Company.
<bdi><a href="https://en.wikipedia.org/wiki/en:Alfred_T._Palmer" class="extiw" title="w:en:Alfred T. Palmer"><span title="photographer">Alfred T. Palmer</span></a>
</bdi>
1942-10
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