ALTURA DRONE - STORM FLIGHT - 5.12.2013 from Aerialtronics on Vimeo.
Pretty impressive flight by Aerialtronics Altura multirotor in some heavy winds. Intuitively, the design does not look optimised for flying in heavy wind, as its frontal area looks rather large.
Comments
do you know the term measurement?
you mentioned a wind speed starting at 60 km/h in your blog post.
to be fair the windspeed in your blog post would be in the middle of 60 and 90 km/h.
lots of digits and no evidence.
here +47° 7' 58.33", +7° 3' 27.18" the measured top windspeed was 150 km/h.
What is this comment directed at exactly? Lots of windspeed talk here.
robert, did you measure the windspeed?
the gusts where at 140 km/h - not just what you described starting at 60 km/h.
interesting is to see the speed plot :)
I'm not changing the game, I'm suggesting that does not look like 40 mph winds. The trees are not even moving. You're the one changing the game, presenting a flight of a helicopter in 20-40(maybe) mph winds as evidence that flying a multirotor in 56 mph winds is easy.
The metric stuff is barely worth responding to. I've never been in a situation where cutting a sheet of paper in half to the nearest 0.1 mm using a ruler was even vaguely important. Your whole idea here is flawed because you assume that an American sheet of paper is EXACTLY 8 1/2 by 11, so could easily be cut in half, precisely with a standard ruler. I just pulled a sheet out of my printer, and it is in fact 10 63/64ths, so cannot be cut precisely in half at 5 1/2" anyway. The narrow way is actually 8 15/16ths, so it's even worse. In any case, this could be done more accurately in metric anyway, as a standard office ruler has 1mm gradations, and only 1/16th" which are larger.
What a silly argument this is.
You're right that the metric system was invented a little while ago, and isn't perfect. So let's stick to a system whereby everything is based on the length of the thumb of some king who died long ago, cause that makes much more sense.
20-25mph is a far cry from 56. The trees aren't even moving. But I'm still impressed anyway. 450 's are fidgety little things at the best of times.
I'm in the unusual position of being heavily exposed to both systems, since I live in Canada where we still have one foot in the imperial system. My bathroom scale measures in pounds, I still buy hamburger by the pound. And car manufacturers still report mileage in MPG. Only they use imperial gallons, not American gallons, so this is extra stupid because nobody knows what an imperial gallon is anymore. We buy gas by the litre, and the odometers run in km. So nobody knows how to fact-check the OEM claims. I'm sure this fact is part of the reason why OEM's continue to use it.
So I do use both. The fact that metric is far superior is very clear.
What's 10cm divided by 3? 3.33cm. What is 1" divided by 3? 1/3rd inch, or 21.3/64ths. Try finding that on a ruler. So I really fail to see your point there.
Oliver, I will anxiously await your video of your hex flying in 56 mph winds. As I said, it's pretty dang hard. And I would love to see the video of a 450 Trex flying in 40mph winds in manual, that should be readily available?
As far as units are concerned...The only reason that the rest of the world flies in knots and feet, is because the US aviation industry forced it on everybody else. It's the same reason why English is the default language for airline travel.
However, you shouldn't confuse this domination of aviation industry nomenclature, with that of aviation engineering. You should note that engineering is done in metric. Even the car makers have changed over. The reason being, despite the fact the imperial system may seem kind of touchy-feely, it's completely illogical and difficult to use.
Just this morning, my son asked me "how many feet are there in a mile?" I had to think about that... well, I know that 1/4 miles is 1320, just because people always talk about "running the 1320", something I wouldn't have known had I not been a car guy in the US. So then, 1320*4 is 5280. So 5280 feet in a mile. What? How difficult was that?
How many meters are in a kilometer? 1000. How many millimeters are in a kilometers? 1,000,000. How big is one litre? Well, it's 0.1m cubed, or, 1 decimetre cubed. That's easy. How much does 1 litre of water weigh? 1 kg. Very easy stuff.
The idea that the metric system is hard to use because the sizes aren't right... that's silly.
There's 1.6 km in a mile. What's so special about a mile that a unit 40% smaller is a problem? 1 metre is very close to a yard. A common smallest unit of measure is 1/32nd inch. That's actually very close to 1mm. But there's 1,000,000 mm in km, so that's easy. How many 1/32nd are there in a mile? 2,027,520
Yeah, that just makes SO much sense.
BTW, if your scale reads 160lbs when you stand on it, what is your mass?
I do apologize Oliver, I didn't expect you to see my comment from your world record high horse!
Just to be clear, the comment wasn't for you, it was for people with a sense of humor.
(And generally to support what I think is impressive flight controller performance, and balls from the pilot and support crew)
Oliver, 56mph is indeed pretty dang high winds. Try it for yourself and post the video.
I had a look at the website and this may not be using Arducopter. In that case, Hats off!
I am glad people are catching on how loiter or gps hold should be tested and demonstrated, high swerling and/or gusting winds.
Nice Video!!
It is nice to see loiter being tested in the way it was designed to be tested :) (I assume this is Arducopter)
As for the wind speed, 25 m/s is both impressive for loiter and, and in units recognised world wide (unlike mph). The 3dr Quad will do 17m/s at maximum speed, 54 kph, 33.5 mph for those living in the dark ages :). So I would say that most quads around wouldn't be able to do this.
For those that haven't discovered an online unit converter. 25m/s is, in order of usefulness, 90 km/h, 48.5 knots, 0.0734 mach, 8.33910238e-8 speed of light, 55.9 mph.
And Robert, yes your flight was in higher winds, in a messed up toilet bowl. However, you didn't do the basic calibrations for Loiter and you kept getting scared and flicking back to stabilise. :) This bloke is demonstrating confidence and trust in his loiter.
Now for those of you that don't have a smile on your face reading this. I AM JOKING AROUND. Ok, humor may not be my strongest suit but you have to forgive a bloke for trying!
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