The maths is indicating 97mph on 4s.

[kfxguy]

Travis, don't feed the trolls. He's a screenshot, ruler racer and holds all of his own world records.

Yea, his measuring from a video is just silliness!

[Speed2]

There is a way to tell from a video if a boat is really fast. You can watch a video once and note the time in the video when the boat looked like it was at it max speed, note the time on the video timer when the boat ran at maximum speed.

Watch the video again and you can pause the video in 1 second interval after you hear the motor wind out, note the how much area the boat covers within 1 second or 2 seconds if you like, the faster the boat the more area it will clear in 1 second or 2 seconds.

I will send 2 video and note how much area my boat covers within 1 second or 2 seconds. Compare what you have seen to other boats you have seen doing 90 mph on video.

https://youtu.be/Sv_2jvYTghY?si=3R8wGLMp8dYgzRt3

https://youtu.be/nUnfrzNCr9c?si=pOKffZ6aBS7BcmCL

[BUMBLESPECIMOODA]

I remember from years ago, news saying the police confiscated a guy's motorcycle, cuz they estimated the speeds from light poles on the highway. The bike physically could not go as fast as they calculated. Tossed out of court.

[Speed2]

I went on the beach to do another video Sunday gone. What I notice is the tide was moving fast in one direction in the area that I calculated the speed. I ran my boat over 1000 feet for a speed run. The first 500 plus the boat was significantly slower, then when it reach the area that I made reference too, the average speed over that section was significantly faster.

I attribute the increase in speed to fast moving tide, so it would seem the tide was pushing the boat faster.

[Peter A]

Just buy a gps. that is more believable. Speed runs are done to specific measurements and standards for records. A gps is reasonably accurate for maximum speed.
Why don't you set up some measured speed run poles, get some stopwatches, some other boaters and do it properly?

[Speed2]

I have done the measurements already, I have certain points that I does be looking for in my video to time the boat. I don't just be timing at just any random points, I have careful studied the area.

I have a gps, dynamite gps and I know it is wrong because, I measured a certain area without the gps, then I remeasured the same area with the gps and the gps measurement had the area to be much shorter than it was previously measured. And actually, I did more than 3 different measurements and found the gps to be consistently far off. As in the gps reading had the measurement to be significantly shorter than it really was.

And by the way, most times my calculated speed does be similar to gps readings on most occasions.

[Speed2]

I will give 3 examples where my calculations was inline with the gps.

The dynamite gps measure a certain section to be 286 feet.

I had a boat that was getting 47 mph based on my gps. The same boat that was doing 47mph based off the gps, took 4 seconds to cover the 286 feet section on video footage. When I do the maths 286/4= 71.5 per second, the divide 71.5/1.466= 48.77 mph.
That 4 seconds was not done with my stopwatch method for precision. That was done by pausing the video at one point, note the time on the video timer, then pause it at the next point and noted the time. The timer for the video does not give tenths of a second or hundreths of a second for precision timing. When I want maximum timing accuracy I use 3 phones, one to run the video, another for stopwatch, and the 3rd phone to video tape the stopwatch and the video from the one phone at the same time. Then I would pause the video that was created last. Drag the boat to the start point and note the time from the stopwatch, then drag it to the end of the speed trap and note the time from the stopwatch. This is my precision timing method.

Example 2, another boat gps 65 mph and it took 3 seconds between the speed trap that the gps measured as 286 feet.

286/3=95.33 feet per second. 95.33/1.466=65.029 mph.

In example 2 I am spot on with the gps.

Example 3 another boat gps at 96mph and took 2 seconds between the speed trap that the gps measured as 286 feet.

286/2=143 feet per second. 143/1.466=97.54 mph.

Again in example 3 I am very close with the gps again.

I could give more examples but choose only to give 3 to make my point.

My point is my timing method by video is not far fetch, the 3 examples I give should give credibility to my approach.

But here is the problem the gps them was wrong, because the speed trap is not 286 feet, but actually 324 feet. So the countless different gps used to record speed were all wrong because they fail to accurate measure the area that was covered.

For this reason I have no confidence in gps.

And I have provided a video of my boat that I explained covered the speed trap in 2 seconds.

[NativePaul]

If you have 3x phones with decent video surely one of them has GPS, that doesn't look like a small boat if you want to know how fast its going just put a phone in the boat.