What would an ATP AMEL pilot with no ASEL privileges require to fly a single-engine experimental, solo and with passengers?
At one time, I don't think there were any requirements unless mentioned in the operating limitations. It would be a strange limitation, as who would think to include it? Around 2005, I think there was a policy change regarding ASEL pilots flying experimental AMEL's, requiring a "type rating" for that specific aircraft in lieu of AMEL certs.
Are experimentals still no class, no category aircraft with all limitations needing to be described in the operating limitations?