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kach22i 09-20-2017 02:04 PM

Random Aerodynamic Oddity of the Day Thread
Random Aerodynamic Oddity of the Day Thread

A thread to place some of the weird things you come across.


1936 H G Wells based movie “Things to Come”
I'm thinking such a helmet could be useful in a trike design or someplace where a really small canopy is too expensive or heavy to implement.

It was just too darn silly not to share. :)

Things to Come (1936)

Easier to pressurize a suit than an entire cockpit I guess.

Remove the wings and you might get a road vehicle out of it.

People will be sure to get out of your way.

kach22i 09-20-2017 02:05 PM

Silent Helicopter Blades

Cutting down on the 'blade-vortex interaction' that causes the loudness of helicopters today, Blue Edge works with another technology called Blue Pulse to combat that phenomenon.

According to Gizmodo, by adding 3 flaps to the edge of the Blue Edge blade, they "move up and down at 15 to 40 times per second, using piezoelectric motors that also help to reduce the blade-vortex interaction."
Video in link above.

MetroMPG 09-20-2017 04:42 PM

Great thread idea. Subscribed and on the lookout.

kach22i 02-15-2018 12:27 PM

A wind tunnel and laser guidance helped the Olympic luge team learn about uniform tech,50

The key piece of equipment at the San Diego Wind Tunnel is a 20-foot fan, powered by a 2,250 horsepower motor, that accelerates air up to 270 miles per hour. .....................

“We taught them some things about the fabrics that they were using,” he adds. To keep the person wearing the different suits in the same position and minimize variables, they used a laser guidance system, projecting the laser’s light onto a specific spot on the helmet.

freebeard 02-15-2018 04:49 PM

Can we include hydrodynamics? One of my current fascinations (as of 20180212) is the M-hulled M-80 pentamaran: Solution... Permalink #17
(I guess it is compressing air in it's passive ram-jets) ...and it's surface-piercing (anti-cavitation?) propellers:

Frank Lee 02-15-2018 06:50 PM

What could be more random or odd than the Ram Implosion Wing?

gumby79 02-16-2018 01:50 PM

Would it be better to spin the water opposite the prop kind of like running a stator Upstream of a fan to coach the incoming flow to be moving at a right angle to the direction it will be coming out of the fan improving it's forward bite on the air

freebeard 02-16-2018 02:25 PM

Frank Lee never forgets.

gumby79 — A Gurney flap or something? It would probably add more drag than thrust. I suspect the problem with anti-cavitating props is air bubbles eating the metal. Those flutes may be for vortex generation or something.

freebeard 02-22-2018 04:14 PM

Days on end without oddity? Bo-ring.

kach22i 04-20-2018 10:06 AM

I found something odd, and if all "fluid dynamics" are fair game then explain the advantage of the gap/slot before the movable portion of the rudder.

MORE random pics...... - Page 4443 - Pelican Parts Technical BBS

I have an idea or two but want to see if it matches anyone else's ideas.

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