909 Bergspyder

[roon]

2.0L flat 8
849 lbs / 385 kg

[henry]

Thanks. One of my favourite cars.

If if remember correctly it had a spherical fuel tank pressurised with nitrogen to dispense with nasty heavy power consuming fuel pump.

[roon]

Fascinating, clever. I did not know that. Fueled like a rocket.

The rear fins are connected to the rear suspension arms. Looks as though droop would cause their aoa to increase.

At 3.4m in length, this car could fit within the W10's 3.7m wheelbase.

[Morteza]

If if remember correctly it had a spherical fuel tank pressurised with nitrogen to dispense with nasty heavy power consuming fuel pump.

You are correct
From Ultimatecarpage.com

A unique feature of the 909 was the fuel tank. At 16 litre, it could hold just enough fuel for one run up and back down the mountain. All 1.7 kg (3.8 lbs) of the fuel pump were saved by using a nitrogen pressurised sphere. The 'Kugeltank' consisted of a titanium exterior shell with a rubber bladder inside, which contained the fuel. Before the start nitrogen was fed into the space between the shell and the bladder to get the pressure needed to send the fuel to the engine.

[Cold Fussion]

Beryllium brake discs is bonkers.

[humble sabot]

I wonder to what extent they were beryllium. There are a few alloys high in Be, copper ones and Al ones.
The sheer cost of doing monolithic pure Be discs, even now (especially now?) is literally astronomical; space program stuff. The Mirrors on the JWST are Be.

[Morteza]

I wonder to what extent they were beryllium. There are a few alloys high in Be, copper ones and Al ones.
The sheer cost of doing monolithic pure Be discs, even now (especially now?) is literally astronomical; space program stuff. The Mirrors on the JWST are Be.

In the Ultimatecarpage.com article it is mentioned that the cost for the beryllium brakes was $1000 per disc. They were also chrome plated to contain the poisonous dust

[Tommy Cookers]

I wonder to what extent they were beryllium. There are a few alloys high in Be, copper ones and Al ones.
The sheer cost of doing monolithic pure Be discs, even now (especially now?) is literally astronomical; space program stuff. The Mirrors on the JWST are Be.

the attraction as a brake disc material ?
the unique combination of very high thermal conductivity with freakishly high specific heat capacity (and very low density)
though there's a health hazard

the freakishly high mass-specific stiffness is the driver in space systems

our cars etc are populated with moving electrical contacts made from 1.5% Beryllium/98.5% Copper alloy
a few have valve seats made from 2.5% Be/97.5% Cu alloy

iirc really Be doesn't alloy - it forms MMCs

[humble sabot]

Fair point about the MMC nature of BeCu. But I was aking "to what extent" not "to what end". I guess the implication with the chrome plating was that it was pure monolithic Be?