Hi Dave,
Maybe this help:
http://www.xs4all.nl/~robdebie/me163/units.htm
5 August 1944 Several Komets reported by USAAF bombers and fighters, and one bomber crew reported three P-51's being shot down. Reports are inconsistent however.
16 August 1944 Five aircraft operational, launched against 1000+ US bomber formation. One Komet shot down near Böhlen by B-17 tail gunner ; Wnr unknown, pilot Feldwebel Straznicky used his parachute. Leutnant Hartmut Ryll attacks two B-17's (both return home), but is shot down by P-51's. The Komet explodes, Ryll is killed, wreck impacts near Bad Lausick (Wnr 3100..). Two more Komets attack bombers.
Cheers,
Franklin