Interesting Aerodynamic Cars (Mike Vetter's ETV, also Avion)

[kach22i]

Teardrop Cars
CLASSIC CARS
Aerodynamically, the shape of a drop of water faces the least air resistance, so in the years running up to the Second World War, numerous ŠKODA vehicles strove to replicate this “teardrop” look.
https://www.skoda-storyboard.com/en/...teardrop-cars/

The 532 and 536 bus prototypes also featured aerodynamic rear sections. The triple-axle 532 with independent suspension on all wheels was particularly impressive. Its rear-mounted engine was separated from the 35-seater passenger compartment by a soundproofed partition and could be reached via a hatch. The wheels on both rear axles were skirted for improved aerodynamics. The upcoming war, however, halted the development of these prototypes.

AUTOCULT - SKODA - 532 AUTOBAHNBUS CZECH REPUBLIC AUTOBUS 1938
https://www.carmodel.com/autocult/at...us-1938/128098

[kach22i]

April 10, 2019
Tesla Semi-like aerodynamic trucks will be mandated in Europe to make roads safer
https://www.teslarati.com/tesla-semi...europe-safety/

[Cd]

YKYAEM when you see that last picture posted of the Tesla semi and cringe.

( Just look at the area just behind the cab leading to the trailer.The semi may be streamlined, but it's not going to help much if you have the air smashing into the brick behind it ! )

[kach22i]

Interesting architecture and museum with a 360 virtual tour.

https://www.louwmanmuseum.nl/


Page 19 has an egg shaped reverse trike.

https://www.louwmanmuseum.nl/bezoek-ons-thuis/

Scene 26 of 53 is the yellow car far above.
https://www.louwmanmuseum.nl/bezoek-ons-thuis/

RedDevil first posted a link to this museum, I just put it on my bucket list to visit one day.

[JulianEdgar]

Originally Posted by kach22i

Interesting architecture and museum with a 360 virtual tour.

https://www.louwmanmuseum.nl/


Page 19 has an egg shaped reverse trike.

https://www.louwmanmuseum.nl/bezoek-ons-thuis/

Scene 26 of 53 is the yellow car far above.
https://www.louwmanmuseum.nl/bezoek-ons-thuis/

RedDevil first posted a link to this museum, I just put it on my bucket list to visit one day.

It's very good, albeit a bit overcrowded.

[freebeard]

I liked the lattice vault roof. It reminds me of Félix Candela.


https://simplypetrol.com/15-best-car...orth-visiting/



I have a 1/25 scale Beetle with the two-tone paint from the Bugatti Royale (and no camera ), it's the same except the hood frunk is two-toned.

[kach22i]

Originally Posted by freebeard

I liked the lattice vault roof. It reminds me of Félix Candela.

https://simplypetrol.com/15-best-car...orth-visiting/

Candela seems to be akin to Frei Otto but with concrete.

In all of the college credits I took in architecture school, only one class an elective dealt with 20th Century architecture. There was this massive hole between the historic and the current that was neglected, one had to seek this information out on their own.

If an architect's work wasn't on the "approved list" of must know, then somehow it just didn't matter it sort of seemed like. Very few winners, usually European or North American. I felt it was a cultural bias, a sort of discrimination.

Great list of automobile museums, I have to make it out to a couple of them one day.

[freebeard]

There's also Robert Maillart.

Robert Maillart
Robert Maillart was a Swiss civil engineer who revolutionized the use of structural reinforced concrete with such designs as the three-hinged arch and the deck-stiffened arch for bridges, and the beamless floor slab and mushroom ceiling for industrial buildings.Wikipedia

[kach22i]

Equal to +9,500 MPG?

Video: 2016
Under the Hood of the Fastest Bike in the World

https://www.youtube.com/watch?v=BC5K...ature=emb_logo

2014
Eta's aerodynamic design
Eta's aerodynamic design — Aerovelo




From a forum post:

http://www.recumbents.com/forums/top...13&whichpage=8

At a wind speed of about 80 mph it only generates 6.25 Newtons of drag, which comes out to a Cd of .023. The bike has a frontal area of .34435 m^2.

I believe the Cda you have for Eta, maybe wrong. I first get this idea because one the Team Policumbent website they state "Considering a speed of 145 kph, air density of 1.18 kg/m3 and a frontal area of 0.284 m2, we get a Cd of 0.0218".

All of a sudden my numbers don't seem as unreasonable.

I also did some calulations for the Cda of based off a statistic that I found in an article which stated that Eta would only need 198 watts to go 90 kph. This would require (using a Crr of .005 and a bike weight of 6o lb and a air density of 1.22kg/m^3) a Cda value of about .007 @ 90 kph which is far lower than the cda of my design. of course this value would decrease a higher speeds.

Of course simulations do not provide a 100% accurate portrayal of the real world but can certainly help for analyzing trends from iteration to iteration.

So to sum up, I believe the Cda value of Eta is a lot lower that what you have listed. This not only would make sense based off my findings, but the results of Team Policumbents Taurus speed bike which give a Cda of .0061912, and as we know, they don't hold the world record at this time, so it may be a safe assumption to say that Eta is more aerodynamic.

2015
the fastest human on earth
https://tingilinde.typepad.com/oment...-on-earth.html

A person on a bike isn't the most aerodynamic object. The equation I derived is sensitive to the area of the air column you travel through. This turns out to the the cross section frontal area of the moving object times a coefficient of drag - a term that depends strongly on the shape of the object. A Tour de France racer in a racing tuck has a coefficient of drag, a Cd, of about 0.7 and presents a cross section of about 0.5 square meters to the wind. Someone riding a casual commuter bike has a larger Cd and cross sectional area. They effectively travel through a larger tube of air, but at a much lower speed.

Velomobiles are streamlined bicycles. They're rarely seen in the US - perhaps a few thousand have been made and mostly in Germany and the Netherlands. Commercial models have frontal areas similar to that of a cyclist, but the Cd is usually in the 0.1 to 0.15 range - tiny by the standard of even the most aerodynamic cars.2 Even though they're larger and heavier than a regular bicycle, it is relatively easy for a normal rider to cruise along at 25 mph.

The Aerovelo Eta Todd Reichert piloted is the part of a serious engineering project involving some University of Toronto people. The Eta's frontal area is 0.35 m2 and its Cd is an astounding 0.038. A bit of calculating shows the Eta should be nearly three times as fast as a Tour de France road bike at speed with the same power input.3

To put this in context, this bike is about as fast as the fastest hovercraft on record.

I don't know why so much dispute about it's Cd, and why it isn't clearly listed on their website.

EDIT

This one looks road ready, and it leans.

The Fastest Bike in the World

https://www.youtube.com/watch?v=nhv0jrsAW5w

Velox4 streamliner
https://www.recumbent.news/2015/01/0...-in-the-world/

https://www.reddit.com/r/BicycleEngi..._these_things/

https://www.youtube.com/watch?v=kT6cL3a20gE

http://wimschermer.blogspot.com/2014...on-2014-2.html

[kach22i]

Freebeard may like this one.

Facet V1 Velomobile
https://www.instructables.com/Facet-V1-Velomobile/

The Facet V1 is made almost entirely out of Coroplast, the same corrugated plastic that many election signs are made from. The plastic shell is wrapped around a Catrike Expedition recumbent trike.

https://www.pinterest.com/pin/549157748289835610/