Interesting, i think i’ve tried a similar throw, assuming i understand it correctly, but i found that there is too much spin generated and the tube curves leading to decreased accuracy. Right now i use my dominant right hand on the outside of the tube on the back side and my left hand on the left outer part of the tube. I then use my shoulders and a flick of my wrist to generate rotation. The left hand is able to guide it after release to an extent and it minimizes curve and generally glides straight, thus improving accuracy. But then again i guess it really just depends on the human player and what they feel most comfortable with.
At Wisconsin I made one on the rack, one on our robot (not fun…) and popped one after hit it the top of the wall (embarressing, but it was just a practice match).
Now, I just throw them short of the rack near our robot to pick up. We decided that our robot has a much better percentage at making it than I do.
I’m the driver/human player for team 846. In the 2nd round of our day, I threw a ringer onto the top level of the rack. I recall the announcer said something along the lines of me being the second one to do so that day.
Throwing ringers wasn’t a good idea for us. We have BAD aim when it comes to that
thats how u throw a tube
http://public.fotki.com/CrazyKate/first/build_season_021807/dsc06540.html
http://public.fotki.com/CrazyKate/first/build_season_021807/dsc06517.html
http://public.fotki.com/CrazyKate/first/build_season_021807/dsc06544.html
Here’s a few pictures of our human player(166) practicing.
nice pictures of my butt tiff 
At Buckeye, there have been at least 2 successful throws… pretty nifty. 
Throughout VCU and and the first day of Peachtree, I think our human player scored four ringers. Then we had our arm working well and realized that we were faster picking up tubes when our human player fed it to our robot over the wall. So then, we had to stop throwing them over.
But our human player ended up getting really good at throwing them. He’s gotten a lot on during our practice field sessions. In fact, on the practice field one time, he scored a ringer, and then on the next one, he put another ringer over it, effectively de-scoring it. But at least it was only a practice match.
My team’s human player stuck two on the rack today at Buckeye… I also saw one other.
At SVR, it seemed to happen a few times. I even saw a team or two practicing on the practice rack in the pits.
A lot of ringers went on top of the rack (or into the rack) and off the field, though (but the refs put them back).
Our Human player Jordan McRay was able to get 3 ringers on. 1 in practice and 2 during qualifying matches.
Our Human player has scored 4 on the rack
There were many thrown onto the rack in Waterloo. In particular, I think it was the human player from 1503 (? correct me if I’m wrong) who got two on the rack on Friday and at least another two or three today.
Yes, the 1503 human player is scarily good at throwing ringers onto the rack, to the point where it’s a significant competitive advantage. There was at least one match where the ringer he scored actually won the match for them. And yes, there were at least a couple other human players who managed to get one or two on - by late Saturday, you could hear the disbelief in Paul Copioli’s voice as he announced “…and ANOTHER ringer scored by the human player?”.
Team 1444, has had quite a few successful tosses to the rack.
The entire match, including our human player’s amazing throw, can be found on The Blue Alliance 
It’s near the end of the match, you see a blue blur fly up from the right corner of the screen, then just plop down right onto the leg.
Team 610’s human player scored 6 tubes on Saturday… COUNT IT! 6!
In one of our quarter finals match the tube our human player scored put us over the top. Scoring by the human player can be very useful, especially if you get into a defensive brawl where a couple tubes make a difference.
Most of the time i am not called on to attempt to score, we try to do that with the robot because it cuts down on the number of tubes cluttering the field. If needed I think I am about a 18% sucess rate on the top and middle.
Technique: Throw like a frisbee as level as possible, generally when i score it hits the green light or the top spider and flops down on the one below.
The human player for 548 throws it vertical at the side of the rack and seems to do good that way too
Our human player got one on Saturday at Buckeye. It was neat because there were no robots on our alliance for that match that could score a ringer, and yet there one was at the end of the match. I’d say he’s pretty good, he scored in spite of a broken finger on one hand.
JH