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Tests on a model of the D.F.W. airplane T-29 of the "Deutsche Flugzeug derke" (German airplane works) (1924)
NASA Technical Reports Server (NTRS) · leaf 23
Figa.6 & 7. … Rolling moment coefficient. Fig.?.NASA Technical Reports Server (NTRS)
Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.
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