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beau · 11-11-2007, 15:30

Thank you all for your help.
I am aware I might have needed different props because this not a planeing boat and the 30 hp Honda is designed for a small planeing boat.

I have spent many years and built a number of prototypes designing this hull which has a very sharp angle of entry and a flat bottom and wide stern. This was all based on a fast displacment/non planeing hull.

Before I purchased new props I thought it best to seek "the forum's " advise. Thank you all.

The other aspect I have noticed is that although I have no formation of a bow wave evident, even at 8 knots, I am 2 inches lower in the stern than I had hoped (extra large batteries etc etc) I could be dragging a larger stern wave than I had hoped.
So after I change the props I will move some weight forward etc and see how that works.

I appreciate the comments that 8 knots for a 40 ft boat is not bad but I really do expect that by NOT fitting into the displacement hull aspect of bow wave formation etc I can achieve a higher speed using 60 hp.
I will let you know how I go.

11-11-2007, 15:30	#7
beau Registered User Join Date: Dec 2006 Location: Brisbane Australia Posts: 369	Thank you all for your help. I am aware I might have needed different props because this not a planeing boat and the 30 hp Honda is designed for a small planeing boat. I have spent many years and built a number of prototypes designing this hull which has a very sharp angle of entry and a flat bottom and wide stern. This was all based on a fast displacment/non planeing hull. Before I purchased new props I thought it best to seek "the forum's " advise. Thank you all. The other aspect I have noticed is that although I have no formation of a bow wave evident, even at 8 knots, I am 2 inches lower in the stern than I had hoped (extra large batteries etc etc) I could be dragging a larger stern wave than I had hoped. So after I change the props I will move some weight forward etc and see how that works. I appreciate the comments that 8 knots for a 40 ft boat is not bad but I really do expect that by NOT fitting into the displacement hull aspect of bow wave formation etc I can achieve a higher speed using 60 hp. I will let you know how I go.