3 view drawing of 1930s Italian experimental training biplane <a href="https://en.wikipedia.org/wiki/en:Biplano_Calzoni" class="extiw" title="w:en:Biplano Calzoni">Biplano Calzoni</a>
<a href="//commons.wikimedia.org/wiki/User:MLWatts" title="User:MLWatts">MLWatts</a>
2012-04-19
<span class="int-own-work" lang="en">Own work</span>