Random Aerodynamic Oddity of the Day Thread

[freebeard]

RETRO CAR again:

Kaiser Stromlinie: A Forgotten Visionary's Gift to the World of Cars

Last year of production was 1939, so it predates both the Messerschmitt KR-200 and the
Arimoto FUV.

edit:
And here's the Golden Submarine:

Golden Submarine: The 1917 Race Car That Changed Racing Forever

Note that the audio concludes with a mention of a modern replica, but doesn't point out that the first 18 seconds is that replica (the one with chrome not painted wheels).

[cRiPpLe_rOoStEr]

Originally Posted by j-c-c

Seriously, the pedestrian EV problem is easily rectified by a directional front mounted buzzer/squealer/etc that is activated only while touching the brakes that does NOT sound like an obnoxious horn, but more like normal mechanical operation of an oncoming vehicle, so as not to inspire "pedestrian rage".

Some BYD electrics and hybrids have some sort of whistle while maneuvering at low speeds.

About "pedestrian rage", I often see cyclists displaying such behavior.

[Piotrsko]

I dunno , lately all hybrids and electrics have this annoying whine at low speed which I presume indicates electric operation. Perhaps my old age hearing is too good, but I know that I have a loss above 1500 hz.

[cRiPpLe_rOoStEr]

I hear a sound which is not so loud at all quite often when there is a hybrid, usually a BYD, maneuvering around. Porsche's imitation of the sound of an ICE on the Taycan, despite being more pleasurable to listen to, is quite pathetic for being artificial...

[freebeard]

justacarguy.blogspot.com: Small new devices reduce aerodynamic drag on C-17 transport jets. Microvanes, 3D-printed out of composite materials into thin blades about 16 inches long, reduce drag, and thereby fuel consumption, by 1 percent compared to unmodified C-17s.

[Piotrsko]

Hmmm that says there is a bunch of stagnation going on aft the wing or the inboard engines are interfering with this fuselage. Wonder if all 4 of the turbines all spin the same way

[kach22i]

From the same source Freebeard provided, 30% fuel savings projected soon.

Air Force Tests Subscale Model of Blended-Wing Body Jet, on Track for First Flight in 2027
https://www.airandspaceforces.com/ai...ded-wing-body/

The BWB concept could reduce fuel burn by 30 percent versus existing cargo aircraft, which is why the project is being led by the Air Force assistant secretary for energy, installations, and the environment.

[freebeard]

From the same source Freebeard provided...

My favorite source lately is RETRO CAR. There've been some interesting ones lately that I did't post about

1969 Toyota EX-III: A Pioneering Japanese Concept Car

1966 Alden staRRcar: The Forgotten Pioneer of Self-Driving Transportation

As it happens, both from 1966.

[kach22i]

https://forums.pelicanparts.com/off-...ures-2784.html

[freebeard]

Pelican Parts? There goes the rest of the afternoon.

How do you account for the differences in that pic? Maybe Area [is greater than] skin friction?

edit: What did you think about this?

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