In 1940 Paul H. Knepper from Tamaqua, PA, built the ‘Crusader’ as a prototype for a training plane that he had planned to commercially produce in Lehighton. The two-seater featured an innovative tricycle landing gear with a wheel under its nose that prevented the tail from dragging upon landing.
<p>Although advanced for its day the Crusader was never commercially produced as WWII forced a halt in the manufacture of commercial aircraft.
In 1990 friends of Paul Knepper restored the Crusader and donated it to the  <a href="https://en.wikipedia.org/wiki/State_Museum_of_Pennsylvania" class="extiw" title="en:State Museum of Pennsylvania">State Museum of Pennsylvania</a>.
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In the background one sees a <a href="https://en.wikipedia.org/wiki/Piper_J-3" class="extiw" title="en:Piper J-3">Piper V Cub J3C-65</a>
<a href="//commons.wikimedia.org/wiki/User:AdMeskens" class="mw-redirect" title="User:AdMeskens">Ad Meskens</a>, zie ook: <a href="//commons.wikimedia.org/wiki/User:AdMeskens/vliegtuigen" class="mw-redirect" title="User:AdMeskens/vliegtuigen">vliegtuigen</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>