lundberg

@S1Pitts Handle paths are the same (driven by the swing speed profile. 

Here is the difference in speed at 38off for 34.2 and 36.

@Drago actually you do. As you gain on the boat from centerline to apex you go faster than the boat. As you go from apex to centerline you lose ground to the boat (it pulls ahead) and you go slower. The really interesting thing is how much slower you go when the line is short. For the line to stay tight you must slow way down. 

I was reading the "Does leaning harder make you go faster across course?" tread and there was a question "are you going slower than the boat on your way to the wakes" and it got me thinking.......so I tried to model it in Matlab.  I parameterized it as much as I could (boat speed, rope length, reach, swing velocity profile) with a few assumptions (no slack and not skiing any wider than you need to).   The swing velocity profile drives the path and dynamics.  Here is what I looks like.  A couple of things stood out to me.

1) The shorter the rope the faster....and slower you go

2) Your max speed over the water is much later than your peak swing speed

3) If you are pulling all the way to the buoy you are going really fast

4) Yes you go slower than the boat, sometimes way slower

 

What do you notice?

 

Example: Max swing speed at center line

 Example: Max swing speed before centerline

Example: Max Swing Speed after Centerline

 

@AdamCord I think this lines up with "GUT" (https://denaliskis.com/pages/gut-104) except that a minimum swing speed does not make a straight line handle path unless the rope is infinitely long.  

@savaiusiniI'm curious if all the ski sizes (for say the Works 01) are the same length with width or some sort of width profile changing, or if the lengths are different but just not aligned with our preconception of the length we normally ski? If the second is true are they longer or shorter than "normal"?

@savaiusiniWorks 01 and 02 come in

Small (equiv. to 65")Medium (equiv. to 66")Large (equiv. to 67")

Fill us in, what's the story?

5:30 this morning on Lake Washington!

 

 

first triangle to get the horizontal distance. cos(30 degrees) = 37.5/x x = 43.3 feet

second triangle to get downward angle. tan(a) = 43.3/4.92 a = 83.52 degrees (angle from vertical)

 

angle from horizontal = 90 - 83.5 = 6.5 degrees

+1 541. Works great on my 94 PS205.

@MarkTimm very generous offer! Maybe another time.

5:30 am, 54 degree water, 14 year old got a ski run in before school!

 

 

I use these inside my liners.

Shoe Insoles Arch Support Inserts Orthotic Insoles for Plantar Fasciitis, Flat Feet, High Arch, Pronation, Heel Spurs & Foot Pain https://www.amazon.com/dp/B07439XS32/ref=cm_sw_r_apan_i_0M6Q4PD5GXE5K8B4CCGH?_encoding=UTF8&psc=1

@Hucklefin

This might work

https://www.bassboatseats.com/products/12-hinge-mounted-boat-seats?currency=USD&variant=25288451977&utm_medium=cpc&utm_source=google&utm_campaign=Google%20Shopping

 

I have a 94 PS205 and built one using an "off the shelf" seat.

Easy to use, folds down with cup holders in the back and lets me fit more people up front.

The trick was finding one that was not too wide. I think I spent ~$100 and it has worked great for 10 years.

I don't remember where I saw this picture collage but is very cool (I apologize that I can't give the photographer credit). I'm pretty sure it is from the clip in question.

 

 

It is worth zooming in and appreciating the amazing athletic effort. That said, I remember the first time I looked close I thought the ski was not going to be outside the ball.

 

 

The little T shaped washer on the right should be placed (as pictured) with the small part facing the binding. The idea is that when you tighten the binding screw it will bottom out on the T shaped washer so that the binding plate can "slide" and allow the ski to flex more naturally. Many people do not use them and just screw the plate directly to the ski.

@Rednucleus ? there was plenty of neoprene. Mike has a drysuit, I've got a very nice 4/3mm sealed wetsuit, but my son wore my old shorty underneath my old full suit. Builds character!

Got my first ski of 22 in last weekend and my 15 year old son joined the January ski club.

46 degrees air and water.. Thanks @Mike Gile !

 

@RT1 I found an image from 2 years later and you can still see some separation between the two layers. Doesn't stop me from having fun but not as good as new. This is a good reminder to be thankful every time we get to do what we enjoy.

 

 

Several years ago I injured my calf playing basketball. I work at an ultrasound company and decided to track the healing. The first image is of my uninjured calf and the following ones show the injury at day 1, 11, 14, 35, 37 and 49. My calf does not bother me today but it does feel different than the good one.

 

 

 

Something like this?

 

I'm sure radar has already thought of this, but they should make a upper cuff for the "reflex" version with no stretch in the back and a buckle instead of bungees. No risk of partial release and the same tightness every time.

It was super fun. Fast paced (about 1.5 hours each day), amazing skiing, at a historic site! Easy to bring friends and family to and meet new and influential people from the waterski community!

 

How about-

 

SD

 

(Second Derivative = acceleration)