WolstonFlyer Posted September 28, 2013 Share Posted September 28, 2013 Nothing to do with threads getting loose but...... In 1962, Ascher Shapiro, an expert in fluid mechanics at the Massachusetts Institute of Technology who died in 2004, ran an experiment showing that the Coriolis force does affect water drainage, but the rotational effect is so small that it's overshadowed by other factors, such as the direction that water enters a basin or the shape of the basin (which is a function of how the toilet-maker designs the bowl and flush mechanism). Shapiro began his experiment by filling a large, shallow dish with water (two metres across and 150mm deep), making sure that the water entered the dish with a clockwise swirl, the opposite direction you'd expect it to turn in the Northern Hemisphere. He covered the dish with a plastic sheet, which removed any air drag, and let the water stand for 24 hours to negate its initial spin. When Shapiro first unplugged a drain at the bottom of the dish, he didn't notice any rotation to the water as it drained. However, after some time the water eventually began to swirl counterclockwise, though at a slow rate. A few years later, another research team at the University of Sydney showed the opposite to be true in the Southern Hemisphere. .... the people doing the demo with a small bowl / bucket of water at the equator are fakes, even when it was filmed by Michael Palin for the BBC Quote Link to comment Share on other sites More sharing options...
John Privett Posted September 28, 2013 Share Posted September 28, 2013 Posted by WolstonFlyer on 28/09/2013 09:15:08: Have a look on YouTube at videos of people pouring water down a plug hole at the equator, there are lots of examples to look at. The water does seem to change direction or is it a trick?????. ***Link*** Trick. Notice how he puts his hand in the water - supposedly to steady it. Then as he takes his hand out he rotates it slightly starting the water moving in the direction he wants it to go. Except for the final time on the equator when he lifts it out cleanly. Quote Link to comment Share on other sites More sharing options...
Ponty Bri Posted September 28, 2013 Share Posted September 28, 2013 What a great forum this is , so entertaining, nothing to do with flying mind you. Up to now I believed it was all to do with the hemisphere. Brian Quote Link to comment Share on other sites More sharing options...
kc Posted September 28, 2013 Share Posted September 28, 2013 Very interesting discussion, but to return to the original problem -wing bolts unscrewing themselves if anyone remembers-you could always make the wing bolts captive in the wing by wrapping a tiny rubber band around the bolt. Assuming there is a bit of a gap between the wing and the captive nuts it wont need to be removed. Otherwise just link the bolts together with a rubber band after flight. Quote Link to comment Share on other sites More sharing options...
Paul Marsh Posted September 28, 2013 Author Share Posted September 28, 2013 Posted by Ponty Bri on 28/09/2013 14:27:57: What a great forum this is , so entertaining, nothing to do with flying mind you. Up to now I believed it was all to do with the hemisphere. Brian That's why I brought it up. Suppose the original topic is model related, but the water issue is also connected to the original topic, be it fluid dynamics rather than oscillation frequency. We can get to the Chaos Theory, but gravity is playing an active part in both fields - therefore doesn't fall under Chaos Theory, just bad luck when your wings fall off in the air (trust me - I know!). Again gravity plays a part when the model crashes down, but which way does the fuselage spin? Quote Link to comment Share on other sites More sharing options...
fly boy3 Posted September 28, 2013 Share Posted September 28, 2013 Jokes aside, you can buy LH rulers where the measurements are read from right to left. This helps left handed people draw a straight measured line in the natural way (r to l) for left handed people. Cheers Edited By fly boy3 on 28/09/2013 17:12:08 Quote Link to comment Share on other sites More sharing options...
WolstonFlyer Posted September 28, 2013 Share Posted September 28, 2013 Really fb3? I have never thought about getting a left handed ruler. I have got to get one, that would make life so much easier... I am off to do a web search! Cheers mate Quote Link to comment Share on other sites More sharing options...
fly boy3 Posted September 28, 2013 Share Posted September 28, 2013 **LINK** Here you go WF .Apologies for being off topic.Cheers Quote Link to comment Share on other sites More sharing options...
kevin b Posted September 28, 2013 Share Posted September 28, 2013 Thanks for that FB3. I've now sorted out another Xmas present. Only 11.5 weeks to go. Bah Humbug kevinb. Quote Link to comment Share on other sites More sharing options...
WolstonFlyer Posted September 28, 2013 Share Posted September 28, 2013 Thanks fb3, I have just ordered some left handed goodies for my home office Quote Link to comment Share on other sites More sharing options...
PatMc Posted September 28, 2013 Share Posted September 28, 2013 Barack Obama & David Cameron are both left handed rulers. Quote Link to comment Share on other sites More sharing options...
Codename-John Posted September 28, 2013 Share Posted September 28, 2013 What happens if you have a mixer tap, and the spout is in the centre of the sink ? Quote Link to comment Share on other sites More sharing options...
Tim A Posted September 28, 2013 Share Posted September 28, 2013 "Barack Obama & David Cameron are both left handed rulers" That's strange I thought one was a President the other a Prime Minister? Pat. And if thats the case is a democratic ruler metric or imperial? Quote Link to comment Share on other sites More sharing options...
Phil Claridge Posted September 29, 2013 Share Posted September 29, 2013 the japonese use imperial Quote Link to comment Share on other sites More sharing options...
Rick Tee Posted September 30, 2013 Share Posted September 30, 2013 Posted by PatMc on 28/09/2013 20:15:54: Barack Obama & David Cameron are both left handed rulers. Are you sure? I thought they were left handed tools. Quote Link to comment Share on other sites More sharing options...
bouncebounce crunch Posted September 30, 2013 Share Posted September 30, 2013 I remember the first time my dad handed me a spanner and said "Left for Loose, Right for Tight", that being said we have a lot of left handed women in my town. Quote Link to comment Share on other sites More sharing options...
chris basson Posted September 30, 2013 Share Posted September 30, 2013 Just getting back to the OP for a mo, if you put the plane in the car the other way round would that solve the problem? ;o) CB Quote Link to comment Share on other sites More sharing options...
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