I’m looking to gain some insight on the effect of fin tips extending past the rail line. What are the effects of this? Is this preferred in certain cases? or rather to be avoided. And how far can a fin tip extend past the rail line before it creates an undesired effect?
Whenever the fin tips go past the rail line I find it to look a bit odd, plus it cuts up my feet, so I tend to avoid it. However in some cases it seems unavoidable when putting the fin @ 1-1.25 or from the rail. Especially with pin tails or other tail shapes that have quite a strong curve after the fins.
I’ve recently made a quad and I put the front fin dot @ 1.25 from the rail, 3/16 toe.
I didn’t set the boxes for a specific fin, but I just put in a split keel set that I have which has quite a large front fin with the trailing edge extending past the finbox. With this fin in the box it puts the trailing edge of the fin @ 1in from the rail, perhaps even a little less. And the fin tips extend past the rail line about 0.25in.
Normally I would have used this fin as a reference and place the boxes a bit more in from the rail, to have the trailing edge of the fin @ 1.25 in. However I’ve seen quite a few quads that use split keel fins and they seem to have their boxes @1.25in from the rail, which tells me that in these cases the fin tips must also extend past the rail line. And thats made me wonder if perhaps in certain cases it is desired to have this?
