New Aircraft Drawings: Early RSRA concept diagrams

Now available are four Sikorsky diagrams of an early concept for the S-72 RSRA (Rotor Systems Research Aircraft). While pretty similar to the final product, the most obvious difference is that this concept had a fan-in-tail rather than a tail rotor.

All four drawings are black & white. Included are a 6360X2704 pixel general arrangement; a 4966X1587 pixel cutaway perspective; a 6011X2741 pixel inboard view; and a 4948X2832 pixel structural arrangement.The RSRS drawings can be downloaded for $5.50.