Right, anyone else agree that the 737 autopilot DOESN'T trim for alpha? (Anyway CoP change causes an alpha reduction resulting in a nose-down moment) If it doesn't it's one strange and clunky system. However if no-one else contributes we'll just have to take Northern's word for it. Any 737 drivers care to comment? TowerDog, stalling alpha (or if u want to call it AoA) is what the 'stalling speed' is measured on, whether it's a 73clunk or an A320... we all know that <img border="0" title="" alt="[Wink]" src="wink.gif" />