The density of air is given nominally as 1.225Kg/m3 at sea level at 15degC. Pressures in every day use are specified relative to atmospheric pressure which is typically given as 14.7psi. So your 7psi is actually really closer to 21 psi absolute. This is means that a container inflated to '7psi' actu...

Athletes are paid to use the equipment they are sponsered by. Once again true but not the whole picture... Are you saying that Marc has sufficiently more skill than Youri, Alex, Christophe, Liam and others to overcome the supposed deficiencies in his kites and still place well? At the top level of ...

Marc Jacobs could fly a plastic bag attached to a couple of broom handles and still do well. As could all of the top competitors. For wake style I honestly don't think you need a really high perfoming kite to do well. its far more about the rider than the equipment in that discipline. Now course ra...

RU doing anything new or different than has been done before? I seem to remember that Elliot Leboe produced a Cabrinha DVD; Metropolis, in something like 2004 You mean some manufacturer did what they all should be doing continuously, once nearly 10 years ago? Proper testing of gear is often referre...

I am certainly not threatened by it. And you shouldn't be. If the service you offer justifies the mark-up you put on the products you sell then your business should do just fine. However, this also applies to the people upstream in the supply chain - if the other people profiting off the product yo...

ryanroberts1983, those look like some fine specs. I have not flown a copter with anything more than 4 props so I can't say for sure, but my thinking was that for high wind, to present as little frontal area as possible to reduce the energy requirements due to drag. Also, four large props are conside...

I warned you, Jivomo; here are the first couple (+) of questions Hi Alex, 'Jivomo' doesn't quite have the right ring to it.... I am happy to answer your questions: - I built this unit from scratch using 25mm carbon fibre tube and 2mm carbon fibre plate sourced from a supplier on Ebay. It is my own ...

I custom built a quad specifically for the purpose of filming kitesurfing. When it comes to stability in high winds, size is your friend. My quad is 1.1m (43") between rotor centres and has an all up weight of 5.65Kg (~12.5lb) including 2 x 8000mAh 4S batteries + camera (panasonic HDC-TM700) and gim...

Looks nice. How long has this new model been available? Is there any non Switch affiliated feedback? If it is as good as it looks, this would really suit my budget right now...

No matter what you feel in your lines or how you fly your kite, the amount of energy available in a given volume of moving air for you to dissipate in moving yourself across the water has a cubed relation with wind velocity. I don't think so. The kinetic energy of a "given volume of air" is 1/2(mv^...