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gator1

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    prophecy/stealth w/gatormod

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  1. @dlokshin‌ Thanks for the clarity. Does the satelite signal set the 5 hz update limit? If not can we buy ten recievers and clock them to update in series? Or just ignore. You've probably already answered more questions then you'll get profit.
  2. @dlokshin‌ Thanks for explaining this all to us. To be clear, I am a strong supporter and hope your company can make this work. At 50 mph, which most of us reach in the course, you are updating GPS once every 14.7 feet. A lot goes on in our sport in 14.7 feet, and we want(need?) to know most of it. !.5 feet means the difference between a middle of the pack pass and a record breaking pass. Do you really believe you can fill in the 14.7 foot blanks with sensors and an algorithm? On top of the fact that there is error in the gps fix you got 14.7 feet ago?
  3. @dcrhrisman: In the heli video Jim is generating 1.4 gs, and that is just at 28 off. Pretty sure that's a fact. Most I've felt in a car is 0-60 in 3.9, but I agree that felt like a LOT.
  4. The Tesla p85d goes 0-60 in 3.2 sec. That's 0.85 g. Way slower than us. From the test report: Motor Trend's "......high frequency GPS data loggers couldn't keep up.....".
  5. Asked and answered in the post title: "......female ballers.....".
  6. Nah. On careful, Double Bastard Ale fueled reflection, I'm done plugging away on this one. I've got the data I need. It'd be nice to get the same data set on Regina running 39, but that isn't gonna happen. It'd be even nicer to get GPS data real time, but going up to a satellite to ask it where it is in relation to something here on the ground 10 times a second is a long shot if you need to be +/- a foot or so. There's a reason nobody is doing auto drive in the course. Not trying to save anybody's achilles with this deal. No dog in this hunt. Between the heli video, this data, responses to my posts on conservation of angular velocity, the "straight back leg" debate, some "pm" ing with the tech heads on this site,and too many hours of video watching I've debunked (in my own pea sized brain) the harmful teachings that I thought I couldn't understand because I wasn't a gifted athlete. Turns out they were just utter bull shit. "light on the line" for god's sake! "trailing arm pressure", and "open to the boat"/closed to the boat, "COM this" and COM that and on and on. If you doubt the utter bull shit line, go back and read a magazine article on technique from 10 years ago. And I tried to make all that crap work. And the people who wrote it believed it just as earnestly as the people who write it today. And while its kind of fun to get horton so exasperated he gives me Pandas and starts talking about his 45 days on this earth and the laws of physics, its not that fun. Now, if I can get him to bet me a new BOS tshirt against the one everybody dog cussed, then I'd get motivated to prove I'm right. So, anyway, speaking of dogs and hunts its PHEASANT SEASON. Anybody that wants to make a tracker like I described above, I'd be happy to give you a download of my thoughts. But they're probably worth less than what I'd charge you, which is a beer. @Skoot1123‌ if you're down in springfield or out to spokane and want a pull, be sure to call.
  7. Thanks @Skoot1123‌ next step is a pot or a rotary encoder at the pylon with an arm like one of the camera mounts. Simple data logger stores time stamped angle. Mark with beep from ZO. Dump into lookup table does the trig.
  8. I'm out. If you ever get your GPS to work (I'm betting you won't while I'm young enough to care, but if you do) I'll look forward to the results.
  9. @Skoot1123‌ Thanks! Don't want to tell the galactic leader he's wrong if I've got a math error.
  10. @tbrenchley‌ Yes. Relative to the boat, you are moving backwards until you get to the centerline. Just like a pendulum is moving down until it gets to the bottom of its swing.
  11. Replace wake with centerline and you'd be right. Even at 43 mph right before he crosses the cneterline jim's speed parrellel to boat (Vx) is less than boat speed. This is what I love about data: forces us to think about what happens vs what it looks like. That or my math is wrong. @Skoot1123‌ you're one of the tribe.....is my trig right?
  12. @Skoot1123‌ Jim has gotten slowed down to boat speed at the ball. That's good, means he won't take much of a hit. A tenth of a second later, he kicks the tail, pivots the ski. Makes a wall of water. That wall is the evidence of him slowing down. As we've seen on other posts, maybe 2gs of deceleration. That's a lot of slow down. He won't speed up until the rope goes tight. But now the ski is pointing at the boat. No pull on the rope. So he is still slowing down. He's a good skier, so he rips his arms into his core as/after he pivots. Creates a little load on the rope, so he starts to accelerate a little bit. As he feeds his arms out, he gets up to about 30 mph. Finally, about 2/3 from ball to whitewater, his arms are finally straight and the rope is getting rapidly loaded, so rapid acceleration begins. @Horton, look at the video, with the perspective that you won't speed up after the ball until the rope goes tight. You'll see it doesn't get tight until 2/3 to the white water. When I look at that graph I can feel each part of the decal/coast/accel, and to me its right where the graph says it should be. Wouldn't it be cool to see what this chart looked like for Regina or JR at 39.5?
  13. While you guys are waiting for GPS to get a lot better, this is the kind of data we can get real time. In addition we can get position mapped onto the course and acceleration mapped onto the course.
  14. Video protractor shows me rope angle vs time. Trig and calculus in pics does the rest.
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