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Old 09-26-2013, 09:35 AM   #141 (permalink)
kach22i
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Quote:
Originally Posted by freebeard View Post
Does the Persu design have a flat-12 engine or two inline-6s? It seems over-powered either way.
Persu used an at the time available inline 4-cylinder.

The first patent drawing posted I suspect may be showing a line of batteries (Lohner Porsche-similar?), after all his first car was all electric. The cooling fan may have been to cover his butt patent wise for a gas powered version. However, didn't the batteries of the day require some cooling and venting to prevent them from exploding?

From the link in Spanish already posted.

Persu: ĦExigid coches de menor consumo!
Quote:
Go benefits!
For traction, Persu used a four-cylinder inline AGA Berlin house, with a volume of 1.410cc, developed 22 hp at 2,200 rpm. Bosch boot replaced by another brand Eisemann Mki12 type, and instead of maintaining the trademark Solex carburetor, used one from Haendler & Co., Berlin. Lacking a coherent explanation of why changes in parts checked, you can reach the conclusion that it was because these companies helped in the final vehicle refinement. He kept the gearbox AGA three gears, and braking system, whose pills only acted on the rear wheels.
AGA automobile while 6/20 CV, with its angular body, was no more than 60 km / h, the Persu, equipped with the same engine, could reach 100. With the rear wheels on an axle narrower speeds stroked up to 60 km / h on curves -a success for those years, which was clearly demonstrated an improved aerodynamic body substantially benefits or, in the words of engineer, allowed to use a much less powerful engine to achieve the same performance as a conventional car, with a corresponding reduction in the cost and consumption, which greatly lowered the final price of the vehicle.
Aurel Persu said that experiments had shown that the wheels are sticking out of the body produces a large drag and instability. He also said that with the great oil crisis looming in the coming years would be good to note that, at high speeds, over three quarters of the engine power is needlessly consume only to face air. All this wasted time and fuel was completely useless.
Persu: ĦExigid coches de menor consumo!

Quote:
Central Motor 22 hp. Maximum speed and cornering 100 and 60 km / h, respectively. Clever, no doubt.
EDIT-1
I went back to the US Patent to find out more, looks like he did have in mind a "motor" with a "radiator". Why or how the air flow would be able to pass though the engine as the arrows in the plan view show is a mystery to me.

Streamline power vehicle
US 1648505 A
https://www.google.com/patents/US164...ed=0CDcQ6AEwAA
Quote:
The rearwardly disposed motor m (not a W) drives the Wheels 6 by means of a universal transmission without differential.

The radiator is indicated by is and the fuel tank by r. The inflow and outflow of air are indicated by arrows.


Click link above to view a much larger image.

Speaking out loud, Persu had quite the background in aeronautics, perhaps he knew of a aircraft based liquid cooled flat 12 which required air flow over it's cylinders at the time he did the patent drawing. In that case he was dreaming of building a monster racer - like so many other young men (then and now). In 1922 he would have been 32, young at heart perhaps?

http://www.escuderia.com/persu-aerodinamico-1922/
Quote:
He entered the Technische Hochschule -the-art school in Berlin-Charlottenburg, where he learned mechanical engineering, graduating with honors in 1913. His specialties were the aerodynamics and aircraft mechanics.

Quote:
Aurel Persu, in Bucharest, 1960

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Last edited by kach22i; 09-26-2013 at 11:27 AM..
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