Drawings, no. But photos you'll find a few on the web if you search for "Kellett XR-10" instead of the later "XH-10" redesignation which was not used for very long. You can also find the earlier XR-8 Synchropter, which greatly influenced the design of the XR-10 (dubbed the Eggbeater).
Here are a few links for you:
http://www.aviastar.org/helicopters_eng/kellett_xr-8.php
http://www.aviastar.org/helicopters_eng/kellett_xr-10.php
http://en.wikipedia.org/wiki/Kellett_XR-10
http://www.flickr.com/photos/sdasmarchives/4563936997/
http://www.flickr.com/photos/sdasmarchives/4563937005/
Production:
XR-8-KE: Kellett KH-1 Synchropter, one Franklin O-405-9 engine, one built [USAAF s/n 43-44714]
XR-8A-KE: Kellett KH-1 Synchropter, one Franklin O-405-9 engine, one built [USAAF s/n 44-21908]
XR-10-KE (XH-10): Kellett KH-2X-C "Eggbeater", two Pratt & Whitney R-985 Wasp Junior engines, two built [45-22793,22795]
Second XR-10 may never have been completed.
Production version was to be built by Hughes as the R-10A-HU (H-10A) but this was cancelled.
