By your own numbers the 3 engine full thrust of
120 KG exceeds the weight so he'll still hover.
Anyway why does the engine thrust decrease as he descends more rapidly???
Nobody has said anything about practicality. It
is just a fun project by a bloke who seems to be
doing nicely out of his day business which is the water pump type flyboard.
He also gets some nice publicity. I think I'd
vaguely heard of the water type device but I now
know a lot more about it. As do a lot of other people I suspect.
Mike
At 09:46 AM 5/16/2016, you wrote:
On Mon, May 16, 2016 at 8:58 AM, Mike Borgelt
<<mailto:[email protected]>[email protected]>
wrote:
More here:
<http://www.guinnessworldrecords.com/news/2016/4/confirmed-franky-zapata-sets-new-farthest-hoverboard-flight-record-in-france-427011>http://www.guinnessworldrecords.com/news/2016/4/confirmed-franky-zapata-sets-new-farthest-hoverboard-flight-record-in-france-427011
If he was at close to full thrust he wouldn't
have engine out capability, which is one of the
major problems of all vertical lift aircraft.
Do the numbers. With the platform tilted at 15
degrees off vertical he still gets a vertical
thrust component of 96.6% of hover.
He also gets 26.6% horizontal component.
Presumably if he loses an engine he goes vertical and slows down.
I don't see anything impossible here.
Mike
 "Presumably if he loses an engine he goes vertical and slows down."
More like "Presumably if he loses an engine he
goes vertical and goes down...... hopefully at a speed that is not fatal.
Of course as the vertical speed downwards
increases, the engine thrust decreases significantly..... not a good picture.
It looks like a manufactured blurb to attract
investors.... (who don't understand much physics).
It resembles the blurb for the compressed air
car that made ridiculous performance claims. Promotional rubbish.
This might have some glimmer of truth, but
unless jet technology improves by about 500% it
is not going to deliver any practicality, no matter how glossy the brochure is.
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