Quote:
Originally Posted by freebeard
Edit: Not air cooled.
|
That is a reliable source of automotive information, however the original German website may have been mixing and matching different eras and photos with different models to tell a (
complex) story.
The "H" model has an interesting history to say the least.
Using Google translate on paragraph after paragraph was getting tiresome, so I simply translated the word "air-cooled" and found this passage.
Die Mercedes-Benz Heckmotor-Fahrzeuge der 1930er Jahre - Initiative Kulturgut Mobilität
Quote:
|
Are also formed between the end of 1931 and 1934, numerous designs of small four-seat rear-engine car with air-cooled boxer engines and liquid-cooled three- and four-cylinder engines, which are placed partly in cross motors on the rear axle. Parallel to this in the same size category as well as vehicles with a front engine and front wheel drive, in this combination downright groundbreaking. Kissel encourages the front engine design, where appropriate, to have a replacement for the rear-engine car.
|
The vertical four liquid cooled in the red car may have an air-cooled engine style shroud ducting air to an enclosed radiator. Hence the misleading or confusing photos requiring some sort of deciphering.
Air-Cooled = luftgekühlt
Below are the two images I consider requiring some sort of explanation:
Die Mercedes-Benz Heckmotor-Fahrzeuge der 1930er Jahre - Initiative Kulturgut Mobilität
Again, I suspected these are positive or perhaps negative air pressure ducted air enclosures pushing or sucking air through the rear mounted radiator.
I consider this to be a very efficient and aerodynamic advancement.
It is not often we look under the hoods of cars in the aerodynamic forum, this case study affords us this chance.
NOTE-1: The two photos above I think show some experimentation in packaging of the air-duct and radiator location.
The wishbone frame top one looks to be a bottom discharge.
The close-up second photo a rear discharge or the far side we cannot see discharge.
I suspect the boatail roadster used the bottom discharge.
I suspect the sedan/coupe used the side/rear discharge layout.
I also could be wrong, it's just the way I would have done it considering the body shapes involved.
Note-2: These are clearly two different engines and transmissions, and probably two different model variants from which they come from.