Quad Fin Placement - Mini Simmons

I’m gonna shape a 5’ 10" Mini-Simmons Arc/Velo tail quad. I’ve already made the fins out of ply - they are similar to the speed dialer template, but the trailers have a little more rake. Anyone in Swayland have some good advice on placement and toe? Since it’s an arc tail, should I measure from the tip of the tail, or where the tail curve meets the rail? Any tips would be greatly appreciated.

-Lance

Anyone? I would like to make one myself.

im also thinking of making a hollow wooden mini simons with twin keels :slight_smile: but i guess keels are abit diffrent im still interested in this :slight_smile:

Me too.  I like the look of ACE’s mini’s and hope he’ll chime in. Mike

Ok, since I got so many replies (sarcasm), I decided to post up the numbers that I’m thinking of. The fins I foiled are like these  PT quad fins, as I’m a bigger guy. I was planning on placing the
trailing edge of the front fin at 11" up from the tail, and 1.25" from
the rail, with 1/4" toe. The trailers would be 1.75" back from the
trailing edge of the front fins, 1.75" from the rail, and 1/8" of toe.
Do these numbers seem right? Would there be any advantage in moving the
entire cluster back 1/4"? Should the trailer be closer/further? Pros/Cons? And don’t everybody chime in at once! :wink:

I’m not sure if I can help, but for what it’s worth to you:

I build small, fairly wide tailed kite surfboards and I’m having great results with Pro Box fin systems set at 11 1/8"  @ 1.25" in from the rail and the rear boxes set at  5 1/8"  from tail of board (or a 6" spread between boxes) and @1.5" off the rail  ( with the fins all the way back in the Pro Box inserts.).

    I’ve reduced my toe-in to 3/16" from 1/4" and like the subtly faster feel…   I can, and do, push each set up the 1/2" that the Pro Boxes allow… It’s fun to change the drive /looseness and see which suits the conditions of the day…

Sorry, I’ve never ridden a Mini Simmons, but these fin locations are working extremely well in my application on 5’-6" long boards with 14 3/8" to 14 3/4" tails… They would most likely work well in yours…

I started  k-surfboards with the rear fins at  2" in off the rail, but have pulled them out towards the rails on the wider tailed boards,  this seems better / faster…  How wide is the tail on your Mini S??     You might want to consider moving the back set out the extra 1/4"…

Lance,

The reason you didnt get much help from the guys is that it is all in the resources. I did a quick search and came up with this thread that gives all the details from two of the most knowledgeable swayers around. Check it out.

http://www2.swaylocks.com/forums/convertible-min-simmons-keels-to-quad

Hope it helps.

T

Hey Kiterider, the tail is super-wide, like 18". Looks like the numbers you put up are really close to what I’m thinking. StAugie, I saw that thread a while back, but didn’t see specifics regarding #'s for glass-ons, mainly the #'s are for spacing between boxes and whatnot, so it seemed kind of tough to translate when thinking of fin trailing edges. I think I’m gonna go with the #s I put up, and if it’s a dog, I’ll grind them off and install Lokbox or Proboxes. Thanks for the replies.

This is the answere to another thread same question.

 

OK sorry took so long been busy test running the board. I do not
measure my fins anymore, built a “findicator” that does it all for me.
Here is what works for this one, Lead fins 10 1/2" up 1 3/4" from rail
3/16" toe in. back fins 5 1/2" up 2 1/2" from rail 1/16 toe in. I
approach the Quads the same as I did Bonzers. The fins are a “unit” that
adjusts to the boards length width rocker etc. ACE

 

This is the placement for a 8’er. Move em back a couple inches for a smaller board. 1" per foot would be a pretty good guidline.

These numbers are what I’ve found to work and fit boards in the 5’8 to 6’ range:

front fins - 10 1/4" from tip of tail, 1 1/4" off rail and toed 1/4"

rear fins - 4 1/2" from tip of tail, 2" off rail and toed 1/8"

I normally run Futures Controller fins in these and have had great results and good feedback from customers.