Foils

[aussiebasser]

My guess is that the leading edge of the old foil was thicker, and created more drag than the Permatrim.

[SteveCan]

It is my opinion that a foil fitted to the Cav Plate has negative effects upon the leg of the outboard to act in its design as a rudder.
It is also my opinion that to much lift can be created, causing the hull to broach in a following sea, forcing the nose of the hull to follow a wave along its length.

I Have to agree with Kev. I had a foil fitted to my 16ft fibre runabout before I really got to know the boat properly. I had bad problems with broaching and trimming didn't make much difference. As soon as the foil was removed it perfomed Heaps better. Interestingly - the speed on flat water at 4500 revs was up from 41k to 46k - about 10% difference.

I reached the conclusion that they didn't work well on my boat They must do well for other boats or they wouldn't be so popular #???

From what I have read, most of the boats that seem to benefit are flat water or inshore boats. Perhaps Foils are more suited to condtions in the creeks, lakes and rivers rather than outside?

Cheers
Steve.

[mackmauler]

I have a foil on my rig, not sure what type, it looks to be black plastic shark fins that bolt onto the cav plate stopped the cavitation I was getting and holds the boat on the plane at low speed, also helps with acceleration in the bar, my boats got tubes which makes it hard to compare to standard hulls, maybe the extra stability of the boat makes up for the few bad points foils can have ???

[jaybee]

I have to agree with kev as well on the foil acting as a rudder, i purchased a 16 fto boat with one fitted on a glassed out day (the test) three on board couldnt fault it, the first run a few weeks later off mooloolaba couldnt get over 10 knots in a following sea was damn dangerous with the foil lifting the stern and digging in from side to side was broaching fairly badly, took the foil off 25 knots in a following sea no probs, boat is a little bow high but is very comfortable in a bit of slop.
cheers
joe.