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

[freebeard]

The value or importance of internal aerodynamics and or air-flow.................could be the start of a new thread?

A good start would be to have the mods carve everything from Permalink 1576 off into a new thread. They can do that.

[kach22i]

Car-Revs-Daily.com 1938 Tatra T97 Aerodynamic Sedan at Pebble Beach 2014 Concours 45
Car-Revs-Daily.com 1938 Tatra T97 Aerodynamic Sedan at Pebble Beach 2014 Concours 45 » Car-Revs-Daily.com


Car-Revs-Daily.com 1938 Tatra T97 Aerodynamic Sedan at Pebble Beach 2014 Concours 32 » Car-Revs-Daily.com


http://www.curbsideclassic.com/curbs...y-say-bathtub/

[kach22i]

1930 BENTLEY 'BLUE TRAIN' RECREATION
The Whole Car - 1930 Bentley 'Blue Train' Recreation






Wishful thinking on my part?

It might have a slightly lower Cd than comparable cars of it's day.

What do you think?

Low roof makes for a lower CdA, right?

[sgtlethargic]

<<<
Wishful thinking on my part?

It might have a slightly lower Cd than comparable cars of it's day.

What do you think?

Low roof makes for a lower CdA, right?
>>>

I'll take a stab at it. Looking at the side view. The main attraction is the rear of the roof-line. The nearly vertical windshield will detach the flow and it won't reattach, so the roof-line won't make a difference. The visor assures it.

[Frank Lee]

IMHO In this case the visor may help flow on the roof. Whether it does or not, the quasi-fastback is going to help some. The relatively low roof will reduce A in CdA. But as a whole it is an aero abomination.

[aerohead]

*Forward plunging roofline is helpful.
*Along with sunshade,it helps keep the rooftop in a beneficial pressure gradient.
*Being 'chopped' reduces frontal area,as mentioned already.Good.
*The radiator cap,it's excrescence,spare tires,4-mirrors,upright windscreen and A-pillars are going to compromise the side flow along the greenhouse.
*If the flow is intact longer along the top due to the taper it won't see the full benefit because the side turbulence and it's low pressure which may cause downward bleeding and vorticity.
*It IS and abomination.Highly mutilated!

[kach22i]

Originally Posted by Frank Lee

IMHO In this case the visor may help flow on the roof.

Most visors are vented at the intersection, this one is not. it must really cup the air, perhaps this forms a pressure bubble for adjacent air to go around?



Aerohead

It IS and abomination.Highly mutilated!

Yes, but everything is relative.

In 1930, other cars looked like this:

Crossley Cars in the 1930s


Not like this:
Crossley Cars in the 1930s

A strange diversion - the Streamline

A real oddball was the Crossley Rear Engined Streamline based on Burney patents of which 25 were made in 1934. One of Burney's ideas was that heavy items should be carried at each end of the car. The engine at the rear accounted for one end and, unlike the original Burney, the radiator and battery compensated at the front. The car used the Silver's 2 litre engine with Wilson preselector gearbox. It also retained Burney's idea of storing the spare wheel inside one of the rear doors which cannot have helped the structure. To assist the streamlining the rear track was 13 inches less than the front. The Motor testers got a maximum of 78mph and could have gone faster except for repair work at the Brooklands track. On the styling they commented "Whether or not the resulting appearance is pleasing to the eye is a matter of individual taste".

At least two examples survive, one, the prototype in private hands and the other in the National Motor Museum at Beaulieu. It was a strange looking car and so unconventional that it must have been hard to sell. The 1934 price of £750 was reputed to be loss making so the 1935 price of £395 seems to be rather desperate.

More here:
Crossley Streamline Data

Drive shaft
Rear engined. Drive via Cardan Shafts.

What's a Cardan shaft?

Is that like a CV joint?

http://www.crossley-motors.org.uk/hi...treamline.html

In the 1930s Crossley joined in the enthusiasm for streamlining, designing a car using Sir Dennistoun Burney's patents and with the engine from the Silver rear mounted. Although more conventional looking and shorter than Burney's own cars, it was still too "different" to sell and was expensive. Two complete cars, one with registration BGU 217 in the collection of the British National Motor Museum at Beaulieu, and some remains of a third survive.

[kach22i]

Streamline Cars Ltd – The Burney Car | The Old Motor




Burney Streamline (1930) - Blog


Burney Streamline (1930) - Blog




Burney Streamline (1930) - Blog

[kach22i]

Claveau model, rear-engine prototype with a monobox body, uniting... News Photo | Getty Images

Claveau model, rear-engine prototype with a monobox body, uniting construction with aerodynamic shape, 1927.

[Frank Lee]

Put those ginormous headlights into the nosework and increase the A-pillar radius and you'd have something!