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Old 01 August 2013, 04:40   #11
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Country: UK - England
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Little boats always feel fast until a big one goes sailing past. ;-)
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Old 01 August 2013, 05:33   #12
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Still think 36mph is reasonable? The second video is the race class that mine is tuned. You can tell its a lot faster than 36mph and more like the one in the video



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Old 01 August 2013, 05:41   #13
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Originally Posted by lukewhiting View Post
Still think 36mph is reasonable? The second video is the race class that mine is tuned. You can tell its a lot faster than 36mph and more like the one in the video

]
. I'll race ya. :-D Had 47.2knts and climbing with three big blokes and a heap of camping gear coming back from the Scillies at the weekend.
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Old 01 August 2013, 08:28   #14
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Try speedbox, max speed, speedometer or GPS speed amd let them get going for a while, check them against another GPS or a car and you'll be certain that he phone is accurate.

It might have a surf prop on which will focus on acceleration and not top speed - is it running out of revs? You can get something called tiny tach (Tinytach website) or something similar which is useful for setting one of those things up.
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When a boat looks that good who needs tubes!!!
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Old 01 August 2013, 09:11   #15
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Originally Posted by Cookee View Post
Try speedbox, max speed, speedometer or GPS speed amd let them get going for a while, check them against another GPS or a car and you'll be certain that he phone is accurate.

It might have a surf prop on which will focus on acceleration and not top speed - is it running out of revs? You can get something called tiny tach (Tinytach website) or something similar which is useful for setting one of those things up.
Just tested it against the car and the phone was 16mph under when I drove at 30mph!! It's not a surf prop but I'm not sure what pitch it is because it came with the boat & all the serial numbers have worn down.

I used to have one of then but I managed to get water in it.

Ill just borrow a GPS & see what happens but either way I'm not too fussed just interested
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Old 01 August 2013, 16:24   #16
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It doesn't do knots of course, but MPH is OK for me.
...
Have you checked the settings? I use a Venturer and it has a marine setting, lat and long rather than grid and knots
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Old 01 August 2013, 17:09   #17
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True speed....borrow a proper old fashioned trailing Walker log & measure v. accurate time over set distance. Might be a bit tricky on a Zapcat, but I'd rate proven low tech over electronic gizmos. And if you can calculate the impact of the drag of the towed log even better.

Not a serious suggestion, but might be an interesting experiment.
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