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08-20-2013, 09:54 PM
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#1 |
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Senior Member
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You think your BRZ/FRS is fast? Check this out-truly amazing
A few years ago, my life was all about Dynamic Soaring.
My friends and I fly unpowered model sailplanes, and we hold the world record for ALL model aircraft! We are 200mph faster than the fastest model JETS!!! Presently the record stands at 499mph! This is real, sustained speeds. Here's some slow vids, where you can still see the planes. The fastest videos over 450mph you simply cannot see the planes. I'll explain just exactly how this is all possible in a bit, until then, enjoy these vids. Crank up the sound! [ame="http://www.youtube.com/watch?v=WaQB16ZaNI4"]New Dynamic Soaring World Record -- 392mph - YouTube[/ame] [ame="http://www.youtube.com/watch?v=Vi0hrjqU15I"]100" Kinetic Sailplane 357mph Dynamic Soaring World Record - YouTube[/ame] Here's a fast vid but you can barely see the plane, but the sounds are great. [ame="http://www.youtube.com/watch?v=rfoxjNg-eg0"]Spencer's World Record 468mph Kinetic100DP flight video!!! - YouTube[/ame] |
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08-21-2013, 03:57 AM
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#2 |
Join Date: Jul 2012
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I see you're up to 498...
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08-21-2013, 06:59 AM
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#3 |
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I'm dizzy now...
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* ‘23 Corolla GR—AutoX/DE toy
* '13 Toyobaru P&L Turbo WRB BRZ SCCA XS-A build starting. SOLD * '22 Z51 Vette--sold. * '09 Nissan GT-R--gone, but not forgotten... 10.63 @ 131+ on streeties. * '90 ZR-1 11.0 @ 130.2 & 11.2 @ 132.4 sprayed 120 shot. |
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08-21-2013, 07:22 AM
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#4 |
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Member
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That is awesome....how are they able to go that fast?
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08-21-2013, 08:49 AM
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#5 |
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Member of the year - 2016
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According to everyone else on this forum the twins are slow.
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08-21-2013, 09:28 AM
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#6 |
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i'm sorry, what?
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my bicycle is faster than my FRS...
neat videos... so how do you control these exactly.. and why do they only fly around in a circle?
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don't you think if I was wrong, I'd know it?
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08-21-2013, 03:59 PM
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#7 |
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Senior Member
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Standing on a ridge, wind hitting one side of the ridge creates lift, like seagulls zooming along cliffs at the ocean.
Behind the ridge is the "backside", where the air is still (no lift). There's a separation layer between the air zooming over the ridge and the dead air behind the ridge. Usually, if you fly back behind the ridge you crash or have to land out because there's no lift. We found by accident if you zoom down through the separation layer behind the hill with enough speed to get back around to the frontside, that you GAIN energy. We maintain these circuits and gain energy with each lap. It has to do with airspeed jumps over the wings. If you're going 100mph downwind in 50mph winds, airspeed over the wings is 50mph. Once you cross the boundary layer into the still air behind the ridge, you're going 100mph and the airspeed over the wings is 100mph (50mph jump in airspeed over the wings=energy gained) crank it back around up through the separation layer INTO the 50mph headwind, and the airspeed jumps to 150mph, another jump in airspeed over the wings. The planes cross the layer 2 times every lap gaining energy every time the plane crosses the layer. If you take the round circuits, and break the circles up into "S's", you have what albatross do to cross vast ocean expanses without flapping their wings. They fly along weather fronts, crossing the boundary layers, zooming in and out, gaining energy and then "coasting" with the energy gained. Better descriptions and info can be had at RCspeeds.com |
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