Dyle et Bacalan DB-70 3-view drawing from NACA Aircraft Circular No.113
NACA Aircraft Circular
1930-03-01
<a rel="nofollow" class="external free" href="https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19930090390.pdf">https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19930090390.pdf</a>