djciii wrote:
klehner wrote:
ToKnowMore wrote:
Great question. To be honest, I don't know. If I don't do flip turns, I have to accelerate and de-accelerate more.
Run that past us again? Last I checked, people who do flip turns have to decelerate ("de-accelerate" isn't a word) into the wall and accelerate off the wall, just like those who do open turns. I don't think that this is right...I am not any good at flip turns but my understanding is that the top swimmers are actually able to get, for the lack of a better term, a slingshot effect off the wall due to carrying the momentum with them into the wall. When I swim next to the good swimmers in my group they accelerate into the wall...not the opposite
Your are correct in what you believe is happening, just not describing it correctly. I'll take a shot:
If you do a "touch and go" instead of a flip you are stopping all of your forward motion, then restarting it from zero in the other direction.
It is the same for a flip but in a flip, if done correctly, your forward motion is used to reverse your body. As you push your arms down and tuck your head the drag on your upper body will slow it, while your legs and butt continue forward and over your head. That is what causes the "flip"part of the turn. If you are really good at a flip turn and are sprinting you will actually be on your back, legs toward the wall, and still be moving slightly toward the wall. In HS I clearly remember my legs continuing to compress against the wall after I was on my back and before I snapped the my legs straight. Now not so much. Snapping your legs straight stops the motion and starts you going the other direction. All the energy conversions still happen, just at different times and at different speeds. You don't slow less, you slow quicker and more efficiently and change your body position at the same time, which is the 'slingshot effect" that you are trying to describe. A flip guy is "on the wall" a lot less time than the touch and go guy.
When I was much younger I would flip and stay on my back for a lot longer than I do now. These days, if I don't start rolling the moment my feet touch, or even slightly before, my sinuses start filling with water and I drip all day (or night).
"...the street finds its own uses for things"