View Full Version : My board: Isonic 105 dram

Erik Loots
7th November 2006, 05:18 PM
I was planning to surf this board for 1 season. But it will be also my lightweather board in 2007!

I just like it very much. In 2007 I will test it with other fins, that work even better for me.

Isonic 101 should be a bit faster... but that bit is to small for me. And I do not like wood boards. On the water they are ok. But transport/storage damages my boards...(My little bro plays soccer in the garage:@) Dont pay more for a board that is 1 month out in the season for repairs. And I want a board that can survive my surfstyle. My surfbuddies call me: the WILd
(after my to highspeed bodydrag/ crazy speedjumps/ etcetcetc)

My current Isonic 105 setup:

-Footstraps in inner postion (back strap forward/ front strap backward)
-Mastfootpostion with WIdesleefsails (a lot downforce)
2-3cm from the beginning of the masttrack
-Boom level depends on wind (chin or some lower)
-harness lines are 30 inch


Drake slalom pro 28 = bit small (67.1kmh)
Drake slalom pro 30 = best small fin (highwind) Fastest I tested (65.5kmh)
Drake slalom pro 32 = best fin medium wind (64.7kmh)
Drake slalom pro 34 = medium/low wind (59.0kmh)
Drake slalom pro 38 = lowwind (bit big) (55.3kmh)
Drake SRB6 40 = to big for my 80kg (50.1kmh)

For lowwind drake slalom pro 36 is the best ( I think)
I have bought an 30cm speedvin and going to test... Hoping on 70kmh+++++


NS Daytona 8.3 = bit big for my 80kg
Arrows Maxx speed 7.5 = Best size for constant wind like 16 knots (59.0kmh)
NS Daytona 7.3 = Nice sailssize (59.0kmh)
Arrows Maxx speed 6.9 = Best size from 16-20 knots (65.8kmh)
Arrows Maxx speed 6.3 = Best size from gusty wind >20knots (67.1kmh)
Gaastra Nitro5 6.3 = Fast mastposition 2-5cm forward (61.6kmh)

My conclusion from this year:

Isonic 105 (2006) is for the speed not very best. It is average an verrry good board. Planning tru is wonderfull.. Gybing is pretty good, not superb. For 100ltrs and 80kg it is really fast.

For choppy condition(which I find close to my home) It is very fast... On the flat it is bit difficult to keep up. But I can go faster.

For flat I am seeking a fin that makes the board ride extremely lose which causes little drag. It has to keep 35knots wind. The fins I have tested are just to safe, it costs a lot energy to run fast.

First test fin will be: Select lightning speed 30

why??? I did with Select lightning speed 32 under hypersonic my personal record... Was stupid to sell that fin:(

If I break the 70kmh with that fin I will let you know. If you know good fins, let me know!!!

There will be 2 new speedboards for 2007. Probaly no starboard. But the Isonic 105 stays for at least 1 season.


Erik Loots

8th November 2006, 02:49 AM
Hi Erik,

didn't know the iSonics provide for an inner position for the footstraps
Mine doesn't (2006 iSonic 115 wood).
Very impressive the speeds you achieved with your iSonc 105.
Sure your GPS meter doesn't need calibration??


Erik Loots
8th November 2006, 04:19 PM
Inner footstraps is bit confusing. My isonic has for each footstrap 3 different positions. Front middle back.

With inner footstrap position I ment:

Front straps: in the back position
Back straps: in the front position

All my gps speed were measured by an Garmin Foretrex 201. Gps-speedsurfing.com claims it is an good gps for speedsurfing. My record with 6.3 was measured by an garmin geko 201.

On the flat the isonic top speeds with my weight are like 70kmh
In the chop speeds are max 60kmh... but it is a hell of an ride B)

(Sadly I lost my gps last session :@)


Erik Loots
8th November 2006, 04:38 PM
For speed I dont use low nose riding style

but like kevin on the right:


This is me @ my local spot:


That kind of riding is bit difficult but FAST

9th November 2006, 08:58 PM
Hi Erik,

Commom conception is that footstraps placed further back are best for speed. I have mine both all forward just as a starting point on my iS105.
I suppose you played with them could you share your findings?

What kind of wind speed are you refering to to consider a 8.3 sail too big?

On your favourite stance I fully agree, hard to keep the board that way, very demanding indeed.
I'll take your word as I have no gps:(

Erik Loots
10th November 2006, 04:29 PM
I have tried a lot of combinations. I am 1.94m tall.

The main reason I use the current footstrap position is that it cost less power to go fast.

This results in more runs more time to get the best gust...

For my feeling the middle (or even back) hole in the back should be better for speed. But a close stance is just way more comfortable.

Erik Loots
10th November 2006, 04:31 PM
8.3 is possible. Till 12-13 knots it is the better sail.

But an powered 7.5 is just better... Since I have those sails I dont use 8.3 anymore.

10th November 2006, 07:56 PM
I used to use the 8.3 but then i found that the 7.0 worked better for me. do you recon that i should keep the 8.3 or sell it?

Erik Loots
14th November 2006, 04:24 PM
The last sessions I used even the 6.9 in low wind conditions. (12-14 knots with 18knots gusts)

In the low conditions it is a bit less comfortable.

In the gusts you get really an super acceleration compared to the bigger sailssizes.

Topspeeds just increases a lot when planning in gusts.

I think for crosswind cruising a bigger sailsize is nice for keeping pressure.

7.5 is best low wind sailsize. But my bro is thinking the same... he is 100 kg, I am 80kg... so that is why I use at the moment 6.9

I sold my 8.3, I just took the only in very low wind <14kn gusts... what resulted in very frustated sessions where I was just very slowly planning 50% of the time

Erik Loots
14th November 2006, 04:38 PM
Lost my gps so no results @ gps-speedsurfing.com