Naish Mach 2 review

Anyone had a chance to review this new foil. Understand it's a monoblock design but little is known about it's performance characteristics.

I'm interested in hearing more about the new Mach 2.
I'm using the 840 and 1040 at the moment and was just thinking about grabbing, or at least trying, the Mach 1 700.

Maybe I should wait a bit longer.
My old 914 is sitting in the shed as I didn't find it very user friendly due to the high stall speed. This new 711 looks like a hybrid between the 840 and the old 914.

Maybe I am not sensitive enough or don't push as hard as I should, but I don't think I feel too much flex with my 840 and 1040. Even though I don't know what I should be looking out for??
I'm 72-75kg riding a 72L Hover Ascend.

I am a fresh owner of Mach2 711 and I mostly ride Jet HA 840 so I can give you some comparative info. I have only ridden Mach for 1 hour on this Sunday. The first impressions are:
Much higher speed to get going (more pumping)
Much higher top end speed - good for catching bigger faster waves. Although I heard some whistling at high speed - some trailing edge tuning necessary.
Very good glide - comparable to HA 840
Turns like on rails.

I used Hover Ascend 72L for the test and 4.0 ADX in about 20 knots of wind. My weight is 60kg.

Hi winddoc,

I did track my ride with Samsung Watch 5 Pro which is known for lousy GPS. It measured top speed 32 kn which turned out to be watch halucinatination after detailed review of GPX data. Rough estimation is 2-3 knots faster than HA840. 711 also rides differently - effortlessly rips through water since is has thinner profile and less drag. But as i noted: some fine tuning needs to be done to unlock full speed potential as whistle=drag.
I also tried some jumps with 711, but pop is much worse compared to HA840. This also makes landing into flight difficult. I noticed that when the 711 comes out of the water it drops down without a warning. So I did some nasty hammers on top of the wave.
I wonder how fast is Mach2 560. Hopefully I get it for a test ride soon.

As a heavy weight myself (95kg), I can honestly say that yes you do require more hull speed to get up on foil than say the 840 or 914, but!!!! Once you get on foil, boy does the power come on, speed jumps immediately and you will go faster. Super slick and a seemingly endless top end determined by rider skill and precision.
These foils are in stock and ready! Highly recommend matching with the high modulus mast for the ultimate stiff connection and feel.

Ride safe,

JB

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kersh said..
has anyone ridden the 640?? Interested to know how it compares to the Mach 1 / 2 or the 840.

I've ridden the 640, 840 and Mach1-550.

The 640 roll turns way better than the 840. The 640 needs about 1.5 kts more water speed to lift off vs the 840, and will go 2 to 3 kts faster all the time, assuming all else is equal. Once up, if in under powered conditions, the 640 has a noticeable drag-hump to get over, which is very normal for smaller foils. The 640 has a happy foil speed range between 16 and 23kts, where you feel very low arm load to pull it along. A stiff mast is essential else none of this feel stiff will mean anything... It turns great and has superb pitch control with the 220 tail using a 1.25deg shim and 2/3rds of the tail winglets cut off. It's a very fun foil with a good combo of glide and turning ability. The root of the foil is fairly stiff and the tips can flex a bit which I think makes it feel controlled and also smooth. In foil cross section it is a thin foil with a relatively full entry. I think the full entry makes it pretty good in aerated water. All the naish v2 HA foils all have some sweep aft in plan view so they are pretty smooth in turbulent water, and the 640 is the best. The 640 hits a drag barrier at 24 kts. I assume some people could push it to 28.

The Mach1-550 is a nice foil. The M1-550 likes the smaller D180 tail. To take off, the M1-550 needs about 1.5 kts more water speed than the 640. When nicely powered up, reaching or downwind, the 550 is +2 kts faster than the 640. The 550 drag barrier comes in at 25 or maybe 26 kts. I never did over 27 on it. The 550 turns great, with the right tail shim angle. The weakness with the 550 is that it will usually hold a ventilation bubble if you breach a tip. You can sand more twist into the tips to make it better. You can flat breach the 550 and it'll reattach flow easily when it goes back into the water. But beware of defects in the factory clear-coat paint.

Thanks for the feedback Emmett

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Emmett said..

MilesH said..
Emmett - great review, thanks really useful

Is it a 1.25 degree positive or negative shim you are using on the 640?

You're welcome. The 640 is a great foil. Very versatile and predictable. It also tolerates significant rider error during take-offs.

1.25 deg angle change to generate more down force from the stab. Leading edge angled down more than with zero shim. Reduced diving effect in the front foil. Is that what you would say is a positive shim? The mast might need to go aft a little on the board, to control the extra lift.

The stab angle is a rider preference. Also heavier riders might need more angle on rear since the plane rides more nose up with more weight on it.

Thanks Emmett, I'd call that a positive shim