Author Topic: 2016 Infinity Blackfish 14 x 27  (Read 69193 times)

burchas

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Re: 2016 Infinity Blackfish 14 x 27
« Reply #270 on: March 26, 2018, 08:41:00 PM »
Good Luck! I would be surprised if the white inserts will work after seeing the results with your original inserts.
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kayadogg

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Re: 2016 Infinity Blackfish 14 x 27
« Reply #271 on: March 26, 2018, 08:56:15 PM »
Good luck! The white inserts are definitely the ones you want to be running. Visually you will not be able to tell a difference in the angles but they are the most parallel inserts than any of the others.

Rideordie

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Re: 2016 Infinity Blackfish 14 x 27
« Reply #272 on: March 27, 2018, 10:30:24 AM »
Thanks guys.  I guess we will see.  I would bet that the white inserts are the correct ones.  I think that something has been holding this board back a bit and slowing projection over longer runs.  These are significant changes (inserts and ventral placement), so I expect different results.  Hopefully, better results.  I am going to head out later today and see what up.             
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Rideordie

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Re: 2016 Infinity Blackfish 14 x 27
« Reply #273 on: March 27, 2018, 03:47:17 PM »
Wasn't the best day to test, but went out anyway.  First mile into a 7mph headwind, turn the corner then downwind.  Average 4.9 mph going pretty hard.  Turned around back into the wind and side wind on the return average 4.4mph.  My impression:  Not great, maybe slower, but not faster.  Will switch back to the black inserts and see.  Front ventral was mid box.  Where do you run your ventral?       
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BrentP

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Re: 2016 Infinity Blackfish 14 x 27
« Reply #274 on: March 27, 2018, 06:25:27 PM »
For what it's worth, I worked for Infinity for a few years and they are still great friends.

Dave had me put the ventral all the way back in the box. The most critical part is making sure the twins are vertical... Usually the blue or white inserts. On a 2016 I'm not sure which insert it would be. You can check the angle with a square ruler.

I personally enjoy the 4 fins in flat water and choppy conditions / side wind.  I am not a fan in the surf (riding waves) or down winding. They fight and want to go straight which is a good feature but not in surf when you need to turn or when you need  the tail slip when going DW.  Lately what most of the crew is riding in DP is just a front ventral with small single fin.




Rideordie

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Re: 2016 Infinity Blackfish 14 x 27
« Reply #275 on: March 27, 2018, 09:07:25 PM »
Thanks Brent. I will give the square ruler a try. And try moving the ventral back.
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burchas

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Re: 2016 Infinity Blackfish 14 x 27
« Reply #276 on: March 28, 2018, 06:42:45 AM »
Wasn't the best day to test, but went out anyway.  First mile into a 7mph headwind, turn the corner then downwind.  Average 4.9 mph going pretty hard.  Turned around back into the wind and side wind on the return average 4.4mph.  My impression:  Not great, maybe slower, but not faster.  Will switch back to the black inserts and see.  Front ventral was mid box.  Where do you run your ventral?     

I had similar results when riding with wrong inserts. When you compare the 2 sets one after the other, you should get the feeling like you're towing seaweed if you know the feeling.

I've seen it few times already, the custom Blackfish twins are coming in all sorts of angles. For my Blackfish for instance even with the white inserts the twins are offset by 2 degrees.
Instead of fixing the boxes I asked Larry to make me custom twins with the offset built-in, problem solved.

I don't think it's the case with your board, Didn't you get a 6.4mph top speed?
 
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Rideordie

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Re: 2016 Infinity Blackfish 14 x 27
« Reply #277 on: March 28, 2018, 06:55:09 AM »
Burchas,
Yes, I think I did hit that on flat water in a very short sprint with no wind and black inserts.  Not sure what the white ones will do on flat, but I did feel a lot of resistance yesterday. Yes, like I was dragging something through the water.  Was struggling to hit over 5.0 mph even going downwind.  I will switch back to black and see what happens.  Going to be very windy this week, so I doubt I will be able to tell much unless I can find a wind protected cove. 
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burchas

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Re: 2016 Infinity Blackfish 14 x 27
« Reply #278 on: March 28, 2018, 07:10:20 AM »
4.9mph going hard downwind should tell you everything you need to know... Unless off-course you did that in 2ft deep water ;)
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Area 10

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Re: 2016 Infinity Blackfish 14 x 27
« Reply #279 on: March 28, 2018, 07:39:56 AM »
I may have missed this, but how fast do you go in flat water on it with only one smallish rear central fin and nothing else?

I have a 2+1 setup with no cant or toe on my 16ft custom DW board and it does help flat water speed (and also DW and surf). So I’m certainly open to multiple-fin setups. But fins can’t magic propulsion from thin air. I look at some of the Infinity/LA setups and what I see is a huge amount of fin area overall. What is the total fin area of all your fins summed?

Rideordie

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Re: 2016 Infinity Blackfish 14 x 27
« Reply #280 on: March 28, 2018, 08:49:02 AM »
Burchas,
The first 1/4 mile or so was up wind, as part of the 4.9 average.  But, I do see your point and agree. 

Area 10, the top sprint speed with single fin was about equal with the 4 fin set up.  6.3-6.4 mph, as I recall.  Not sure about total fin area.  Have not added it up yet, but will try to figure it out.       
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Area 10

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Re: 2016 Infinity Blackfish 14 x 27
« Reply #281 on: March 28, 2018, 09:47:24 AM »
Thanks. Top speed isn’t a very good measurement. Average speed over eg. an hour at mid-pace, or average speed over e.g. 200 yard sprint at maximum effort would be more reliable.

Eagle

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Re: 2016 Infinity Blackfish 14 x 27
« Reply #282 on: March 28, 2018, 11:08:07 AM »
Here was a quick test showing different boards using different fins.  Did a bunch these runs over a couple of weeks after I got my AS.  Gave me very good info and confirmed a lot of my suspicions about different board and fin combinations.

So would try a small ventral and small kick fin a few times to reduce drag.  Did that on an Eradicator 25 and it went pretty fast.  No timed runs tho.  But first would try different single fins to set a baseline for speed tests.  Then go to multi-fin option speed testing.  ;)
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Rideordie

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Re: 2016 Infinity Blackfish 14 x 27
« Reply #283 on: March 28, 2018, 12:55:08 PM »
Thanks Eagle.  I completed some pretty extensive testing of various fin combinations earlier in this thread.  Top and average sprint speed have been really good for me.  Even single mile runs were good.  The issue that I am having is average speed over longer (6 miles) runs.  I expect that some of this is the nature of the planing hull.  I was told that projection would improve if I moved the ventral back from 28.5 to 20 inches from the balance point.  Just had that done and went ahead and changed out the black inserts for white ones.  Did not seem to help.  Next step is to replace black inserts with white and try again with 4 fin combination and two fin combination to see if moving the ventral helped. Waiting for a flatter day to test.  Wind is about 17 today.           
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Luc Benac

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Re: 2016 Infinity Blackfish 14 x 27
« Reply #284 on: March 28, 2018, 01:27:33 PM »
The issue that I am having is average speed over longer (6 miles) runs.  I expect that some of this is the nature of the planing hull.       

That was always an issue for me with the two 2015 Blackfish I used to own. I just did not have the engine to keep them at top speed for 12 or 15 km and it seemed to me that the average speed drop was somewhat higher than on other boards I own. This might have been improved in the 2017 and/or 2018 models, I am not sure. This was independently of single or multiple fins.
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