Tailplane lift
Talking recently with someone at work about tailplane lift. He reckoned that all aircraft (conventional) had tailplanes that exerted a downforce/negative lift. I had thought that some did, some didn't i.e. C of G could be either ahead of or aft of the mainplane.
He also thought that the tailplane would stall first to provide a nose drop at the stall. however I thought this was because of the C of lift moving back as the stall progresses, tailplane will be unstalled and fully useable during the stall.
I would welcome informed opinions.
(I know I could go and look it up, but the discussions are normally quite illuminating on PPRuNe, and I often learn more).