If your boat is marginal to get on the plane, a foil might help. But it wont produce a miracle. I find them helpful when using any boat on Windermere, they do allow you to plane at a slower speed.
My boat gets on the plane fairly easily but it means breaking the 6knot limit on the river. A big sign says "slow, minimun wash" but my boat creates less wash when going faster on the plane......
I hear you.
My SIB planes without any trouble but is hard to keep below 10mph when planing.
So you are either at 6 mph with a great big wash, or at 10mph with much less water disruption.
On the broads/canal etc this means we do 4mph in the 6mph areas.
I wonder if these hydrofoils would help here? I have seen them fitted on some small boats.
Getting a sib to plane at 6mph even with a foil is a tough ask. When my son was younger and probably less than 40kg he could do it by sitting forward and using a tiller extension. I doubt an an adult could.
