'Contra-Props', an article by <a href="https://en.wikipedia.org/wiki/Frederick_W._Lanchester" class="extiw" title="en:Frederick W. Lanchester">Frederick W. Lanchester</a>, from the 11 December 1941 issue of <i>Flight</i> magazine (first of two pages)
<bdi><a href="https://en.wikipedia.org/wiki/en:Frederick_W._Lanchester" class="extiw" title="w:en:Frederick W. Lanchester"><span title="British polymath">Frederick W. Lanchester</span></a>
</bdi>
1941-12-11
<a rel="nofollow" class="external free" href="https://www.flightglobal.com/pdfarchive/view/1941/1941%20-%202944.html">https://www.flightglobal.com/pdfarchive/view/1941/1941%20-%202944.html</a> et seq