Merlin Engines not operating properly. At various heights, RPMs and Boost settings the engine will run rough and power drops right off.
I tried to test the Spitfire MkIa/100 octane for max speed at altitudes but at the first spot check for higher altitudes (10k and 20k) I was unable to achieve any kind of speed at 3000rpm/6.25lbs (or with BCO off at 10k) due to rough running. They were ok at 1k and 2k.
Please investigate/test and fix the Merlin Engined aircraft. Many more reports in the RC2 release thread, startng here but there are many more on the pages after that:
http://forum.1cpublishing.eu/showthr...t=34902&page=7
Blacksix the RC2 release candidate thread contains many bug reports not listed in this thread.