Takuma Kujira/ Armstrong 1550v2

I presume the 1550 v2 is similar surface area as the Kujira? Both medium high aspect or the 1550 V2 higher/lower overall? similar mast height ?
if so try:

- flip the mast plate to board chips to put your board forward more.

-2 shim. (Will give more front foot pressure and reduce the collapse / stall).

- try a V tail

- even better pair it with a KD Maui tail

- then there is the chop idea all with the above

ps I use a chopped 1250, V tail with a -2 shim when proning. Not sure id use the 1550 unless really small.

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db541 said..
Looking for some advice- I took he Armstrong plunge wanted 2 setups. Love Kujira (prone) regularly getting connections and doing pretty well. Love the way the 1550 V2 / 1125 w V tailand the way they turn but struggling to get the same pump feels as takuma. Only had a handful of sessions but I'm collapsing the v2 constantly when pumping -way diff feel then takuma, I can push as hard as I want on the pump w takuma but the same technique isn't working w V2. Actually having more success w 1125. Anyone made the switch and can offer some thoughts?
Riding 4 6" prone w Armstrong full forward in the box w takuma about 3/4 forward. I'm sure I'll sort it out but I'll take any thoughts!
cheers from N Florida!

The 1125 pumps better than the 1550 V2. What shim are you using? If you are heavy (85kg +) then -2 might help. Do not use the stock -1 setup. At least go 0 and try the +1 if light and fit.
-2 shim hack is reverse a +1 shim and trim to fit.

Thanks guys-
1210 kujira w takuma base shim/ uni 18 tail chopped to 14 w a neg shim
florida surf ( small)

armstrong a+ so no neg 2 option ordered KE Maui shim kit based on reading here
72 mast

-1 shim (none) thats the set degree on A+

Tried w and w out foil hat base shim but last sesh no base shim

yes 1125 more technical but seem to get it going better than 1550 v2.

Kujira i I feel I can push as hard as I want w front foot once I'm pumping. 1550v2 I can collapse so easily. I feel Armstrong wants a more both leg feathered approach. It's what I would call a maintenance pump on Kujira.

This is only refers to pumping back outside on the waves it's great. I know the 1125 I will sort out. It's the 1550 I'm more concerned w.

Using V tail.

Anyone had same feels.

Hilly
"-2 shim hack is reverse a +1 shim and trim to fit."


What did you use to trim the shim?

Ah crap I forgot about the other option mentioned above. Yeh stay high on the mast - lighter pulses to bring it up then you can push harder and will get more forward speed.

Over exaggerate the up pump (sending your arms up quickly helps - and also throwing them back quite far (hence they have a bigger arc coming back up!!). The "up"
is way more important than the "down" pump



hey Wicka what shim did you have on then before you went to zero and chopped your V tail tips. ? More yaw now on the pump ??


ya reckon it's the chop or the shim that's making the bigger difference ?

Gents thanks for the help. I'll work on the -2 shim and the technique. Glad I'm not the only one.

Wicca are you thinking chopping the winglets helped the pump or just the locked feel?

Funny, on takuma that big heavy front foot pump would dig you out of the hole and got you up high on foil then you could do the little pumps and go for long runs. Sounds the opposite for Armstrong. Looking forward to working on it!

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eppo said..
Ah crap I forgot about the other option mentioned above. Yeh stay high on the mast - lighter pulses to bring it up then you can push harder and will get more forward speed.

Over exaggerate the up pump (sending your arms up quickly helps - and also throwing them back quite far (hence they have a bigger arc coming back up!!). The "up"
is way more important than the "down" pump



hey Wicka what shim did you have on then before you went to zero and chopped your V tail tips. ? More yaw now on the pump ??


ya reckon it's the chop or the shim that's making the bigger difference ?

I tried heaps of different shims before I chopped the winglets. I've only tried the 0 shim since chopping, Technically running 0 degs should have the least amount of drag. Unless there is a degree built into the stab. I might try some other shims soon but I'm happy with it for now.
I honestly think the chopped winglets made the most difference. Reduced the drag, it just feels faster and smooth, not as twitchy at higher speeds. There is less yaw stability but I like that as I was previously riding a unifoil flat race tail that has the least amount of drag for any stab I've tried so far, but that comes with the yaw movement, but you get use to it fairly fast.

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db541 said..
Gents thanks for the help. I'll work on the -2 shim and the technique. Glad I'm not the only one.

Wicca are you thinking chopping the winglets helped the pump or just the locked feel?

Funny, on takuma that big heavy front foot pump would dig you out of the hole and got you up high on foil then you could do the little pumps and go for long runs. Sounds the opposite for Armstrong. Looking forward to working on it!

yeah I think it helped heaps with both aspects!
ive ridden my mates takuma lol 1300 and that also had heaps of possitive foot pressure! It's definitely way different to the Armstrong! Stick at it, it will start coming together. It's slowly coming together for me. Haha

I'd give up some pump for the sweet feel of the Armstrong on turns. Always a compromise. Had a good sesh today in waist to chest onshore w the *1 shim (so zero ) and I threw the takuma base plate shim in on the Armstrong - better. Def a gentler feel on the pump but progress was made. Gonna try and wait for Kane shims or sacrifice one of the Armstrong shims and reverse it. I'll let you know how it goes after a few more sessions.
Coming from the uni race chopped maybe I'll be chopping the V. Anyone played w base plate shims on Armstrong?

Thanks gents- appreciated for reals!

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db541 said..
I'd give up some pump for the sweet feel of the Armstrong on turns. Always a compromise. Had a good sesh today in waist to chest onshore w the *1 shim (so zero ) and I threw the takuma base plate shim in on the Armstrong - better. Def a gentler feel on the pump but progress was made. Gonna try and wait for Kane shims or sacrifice one of the Armstrong shims and reverse it. I'll let you know how it goes after a few more sessions.
Coming from the uni race chopped maybe I'll be chopping the V. Anyone played w base plate shims on Armstrong?

Thanks gents- appreciated for reals!

Nice work! That was my rationale for chopping my wing tips and it worked really well! Let us know how you go if you chop.

That was the thought works a treat on Kujira

Do you adjust the mast position in board according to foil? I've found that each foil has it's optimum position where it seems to pump more willingly. I'm not a great pumper (not for lack of trying) so not sure what the pro's have observed?

So some positive feels. Finally got a clean buttery day! Takuma TK 45 very flat bottom - nobase shim. Helped a ton. If your board has tail rocker than maybe base plate shim. The plus 1 shim makes it zero so that helps too! Easy pumps to get it high then you can get the high tap pump going and the big pump when you need it! Had 2 triple dips and a few double dips and some nice carving connections on the V2 1550 w v tail. Still want to try -2 shim especially for small days. Also want to try 1125 w same set up.
Thanks for the help all!