Boat squatting after change to engine alignment

[tomsis]

I wonder if anyone has any thoughts about this. We've just put our Moody 31 back in the water. During the winter we replaced our old stern gland with a lip seal (wich seems to work great - no water comes in!) During this the yard says they realigned the prop-shaft by 4 degree as it was not running straight in the tube.

However we've now noticed that the stern of the boat seems to squat down more than it used to: previously the top of our sugar-scoop stern would sit about and inch or 2 above the water as we motored; now its about 1 inch below. When we sail without the engine we sit as before (2 inches above).

What do people think? Has the yard altered the angle of attack incorrectly, pushing the stern down? Or should it have been like it is now in the first place??

Thanks!

 

[geoffatstanpit]

I bet that the realignment (plus the lack of barnacles at this time of the year) has given you an extra half a knot which has brought the quarter wave closer to the transom.

 

[boatmike]

Very possibly. It certainly won't have anything to do with such a small angle change. What else have you changed? Taken any weight out forward?

 

[TiggerToo]

Tigger also squats more immediately after relaunch: Geoff, must be right. We have not done any mods!

 

[Iota]

Try asking here
http://www.moa.myzen.co.uk/discus/messages/5/5.html?1207051114

Not many questions go unanswered

Iota

 

[tomsis]

so, according to geoff, this isn't a bad thing??