Quad fins with stabilizer fin (some might say knubster)

[Muz74]

Hey munz74, would you say the little rear quad fins add any speed to the set up u posted that looks like a thruster on roids? It makes me want to try my Rusty thruster set with little twinzer front fins in the rear quad position.

Yeah Saxman1, this set up is giving me the best of both worlds, the speed of a quad with the pivot of a thruster. Good fun. Although, this didnt work so well in waves that were fat, neither did the quad (sf4) with knubster. Sucky waves were great though.

[Fritzkat]

Ok, testing a Stubby fin I made out of an old Futures TP-1 rear composite fin.

My guess is that everyone is saying to use it in average to good conditions in a Quad fin with smaller rear Quad trailers, Pointless to have in crappy Bouncy muchy foamy surf, as the fin will not catch in foam and will only drag between the transitions. So, my first test will be with (all Futures) AM-2 fronts 4.79" and combo with V2F4 3.75" rears. I figure on down the line hollow surf head high +
then the AM-2 fronts 4.79" with Quad 3.40" on playful glassy peaky waves that like cutbacks to Shoulderhigh
then the AM-2 fronts 4.79" with Rusty Rears 3.85 on playful glassy peaky waves that like high snaps and cutbacks to Headhigh

I dont think that I will try anything larger like the larger Stamps 4.0 rears as it would be too much hold and not loose enough, unless the waves are cranking. ANY THOUGHTS ON THIS FIN AND WHAT TO COMBO WITH???
Oh and I will be using with my Hellfire, Dominator and the Activator
...th Snubster
stubby fin.jpg

AM-2 fronts (4.79) with Rusty Rears (3.89) & V2F4 (3.75") rears & Quad 3.40"
snub comparisons.jpg

[Slowman]

Fritz, I found that certain shapes reacted badly in bouncy conditions - in particular the first one pictured on p.1 "the slug". I found with enough gradient and curve on leading or trailing edges it helped make the fin's effect more gradual as it "popped" out of the water as you bounced over lumps, so you didn't suddenly lose all the surface area instantly. Anyway I still use mine in crap or good waves and it still works better with than without. Yours looks curvy enough to work in chop too. Even a straighter edge with a good gradient would do the same.

I just took my dom out with a set of FCS SF4 quads with a "stab" and they all worked well together, probably as good as the R2s with a tad more looseness, though I used a larger stab to compensate for the loss of drive over the R2s.

[Fritzkat]

Just tested the Snubster I made on my 6-4 HellFire with AM-2 fronts 4.79" and combo with V2F4 3.75" rears. Head High day. ( had a kink in my neck so I was not as loose as I wanted to be,) However. there did not seem to be any noticeable drag and there was a bit more hold, board was reactive during a carve with little or no sliding sideways. Good hold. Neck started bothering me so I could not retest with out them in the box on those same waves.
2012-06-29_16-59-52_901.jpg

[Slowman]

I've been using a few different stabs...I think I have got it to the point where I can more or less use them to "tune" the board and quad set to the characteristics I want.
280620122223.jpg Hellfire with FCS R2 quads and small stabiliser
280620122224.jpg Hellfire with FCS H3 quads and small stabiliser (too stiff)
280620122226.jpg Spitfire with FCS R2 quads and medium stabiliser
280620122225.jpg Dominator with FCS SF4 quads and larger stabliser

[prjwebb]

Nice DIY work! I'm a fan of the Nub in my Spit. Looking forward to trying it in the Minnie when it comes.

[Fritzkat]

Slowman, those large base fins in the back, they look really stiff, have you tried a smaller sets in the back? Just curious.

[Slowman]

Fritz, it's just a bit of an optical illusion, they are quite small relatively speaking. Roughly the front ones have around 9700 to 9800 squ mm of area and the rears are around 7500-7700, compare that with the Q1000 (K2.1 quad rears) which are 8158 mm**2. The Simon Anderson quad rears are humungous by comparison.

[Chris]

you know...some folks have turned the deviant into a knub. Have to say, I am keen to try that!!

[prjwebb]

interesting.... where's that dremel tool....