Originally Posted by Cruisingdad
Hey Paulo, where did you come up with your data on the C400? DId you calculate it?
You mean the relatively low AVS? It was posted by another poster and taken from a Calder book (that I have too).
I remember having looked at a Catalina 42 stability curve, many years ago, and be confused with the low AVS (105º, a lot worse then the one from the 40) and the relatively high B/D but I guess that has to do with the keel design without bulb and a relatively low draft.
Comparatively a First 40.7 has a much bigger AVS (126º) and for the technical characteristics a First 40 would have probably one close but probably bigger than that.
You can see some AVS here and also an interesting but simplified explanation on stability. Just download the items on the left about stability:
RYA Technical department issues new yacht stability listings | News | News & Events | RYA