Bus roof raise aero

[kach22i]

Originally Posted by cRiPpLe_rOoStEr

I guess you would want to take a look at the current generation of Marcopolo urban transit buses in order to get some inspiration for aero mods.

Hotsite - Comienzo - MP 60 BRS - Marcopolo Ônibus

I was hoping for more from them, no box cavity, still has wheel flares, and those front corners could stand to be more rounded in my opinion.

Is that a city bus or a highway cursing bus design?

We should perhaps be looking a long distance highway cruisers, yes?

I did find the below doing a search on the topic, looks like they did more to the fronts than the rears, which is not very encouraging.

Aerodynamic Exterior Body Design of Bus
https://www.ijser.org/paper/Aerodyna...gn-of-Bus.html

6 CONCLUSION

Four different prototypes have been fabricated for performing experimental and numerical analysis using wind tunnel and CFD software. The Bus No.1 is the existing model, Bus No.2 is the existing model with the rear end modified, Bus No.3 is the existing bus with the front end modified and Bus No.4 is the model with modification at front and rear end..........

EDIT:

This is cool.

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

[freebeard]

These are all nice, but is it known how much length can be added to a 40ft bus? Maybe five feet?

The hardest limitation is the right front corner. Maybe the door could be modified to something like the GMC Motorama trucks.


https://i.pinimg.com/originals/aa/29...2d8fd75252.jpg[/URL][/URL]

[kach22i]

https://ecomodder.com/forum/showthre...ure-33061.html

Many of the European Cabin Over Engine racing trucks have these corner features.

Apparently, they are eliminating the vertical foils at corners and or scoops normally found on European racing trucks (see below).

https://www.eurotransport.de/artikel...-11170089.html




May 8, 2013
Scania - Streamline Aerodynamics

https://www.youtube.com/watch?v=uXF3meOHr08

Leading Edge Radius
https://www.sciencedirect.com/topics...ng-edge-radius


https://www.jstor.org/stable/44718757?seq=1

[Piotrsko]

Legally I think it's 65ft for any vehicle. 40ft is the arbitrary length for non articulated to make typical street corner right turns in a city without running onto the opposing traffic lane, left turns in Britain.

[freebeard]

No doubt it varies by jurisdiction, my recollection is 45ft for a single vehicle and 65ft for any combination, up to three trailers.

[cRiPpLe_rOoStEr]

Originally Posted by kach22i

Is that a city bus or a highway cursing bus design?

We should perhaps be looking a long distance highway cruisers, yes?

That's a city bus, yet it seems to have been inspired by the Marcopolo highway cruisers.

[kach22i]

Some retro inspiration.

Random TRANSPORTATION pictures - Page 2412 - Pelican Parts Forums

[aerohead]

Originally Posted by kach22i

https://ecomodder.com/forum/showthre...ure-33061.html


Apparently, they are eliminating the vertical foils at corners and or scoops normally found on European racing trucks (see below).

https://www.eurotransport.de/artikel...-11170089.html




May 8, 2013
Scania - Streamline Aerodynamics

Leading Edge Radius
https://www.sciencedirect.com/topics...ng-edge-radius


https://www.jstor.org/stable/44718757?seq=1

Hucho commented that, during development of the VW Vanagon, in 1969, when tested at full-scale, flow could remain attached with smaller radii than in scale-model testing. 4.5% of the square-root of frontal area was sufficient.

[kach22i]

Originally Posted by aerohead

.......... 5% of the square-root of frontal area was sufficient.

Thank you.

It can be more complex than that with side view mirrors, visors, radiator grilles and so forth mucking things up, at least that's my walk away from the video.

And what ever you do, don't crack open a window.

[Piotrsko]

Worse yet opening a window and popping open the door. Can you say tornado?