I think you'll like this, lots of pictures
10-16-2003, 06:56 AM
#23
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Have you seen that ...
the new Ford GT40 uses an Alcon 4-pot monobloc caliper? I assume this is the TA-4, and with a 14" front rotor. The original specs listed the Alcon TA-6 ... hmmmm, sounds familar :-)
<img src="http://www.fordvehicles.com/fordgt/images/wallpaper/wallpaper_4_800.jpg">
<img src="http://www.fordvehicles.com/fordgt/images/wallpaper/wallpaper_4_800.jpg">
10-16-2003, 07:21 AM
#25
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Hmmm, that caliper looks like a 6-pot monobloc with
a hole drilled in it for some reason.
Looking at the <A HREF="http://www.apracing.com/car/caliper/index.htm">APracing.com</a> -- the Winston Cup AP SC660, the Champ car AP CP6050, LMP Carbon_CP6040, Australian V8 Touring CP4370 are all monoblocs. Only the IRL CP3996 is a 2-piece, and I assume this is restricted by rules. F1 is so secretive, that it's not listed, but I'll look for a current photo.
<img src="http://pictureposter.audiworld.com/38899/f1caliper.jpg">
Looking at the <A HREF="http://www.apracing.com/car/caliper/index.htm">APracing.com</a> -- the Winston Cup AP SC660, the Champ car AP CP6050, LMP Carbon_CP6040, Australian V8 Touring CP4370 are all monoblocs. Only the IRL CP3996 is a 2-piece, and I assume this is restricted by rules. F1 is so secretive, that it's not listed, but I'll look for a current photo.
<img src="http://pictureposter.audiworld.com/38899/f1caliper.jpg">
10-16-2003, 07:33 AM
#26
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I plan to build one, ...
an ERA replica of the Mark II, rather than the Mark I that the new Ford is based on. ERA's GT40 is close to the original's 2250 lb weight, the new Ford GT weighs 3300 lb ... aaarrgh. Part of the Ford GT's problem is the motor, a supercharged 4.6L truck motor that weighs 700 lb all by itself.
<img src="http://www.gtd40club.co.uk/images/FOS2003/DSCN1598.JPG">
<img src="http://www.gtd40club.co.uk/images/FOS2003/DSCN1598.JPG">
10-16-2003, 07:37 AM
#27
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Re: ok I'll bite .. what's a modulus ;)
Its the measure of a material's ELASTIC stress versus strain. Elastic meaning all stress levels below yeilding.
Or in other words for a given pressure (Psi or Pa) how much it will strain (stretch or compress in length) per unit length.
Its dimensionless. inch/inch
here is some data for various alloys.
3003 and 6061 is 10100 ksi
5456 is 10400 ksi
typ. alum is 10000 ksi
steel(most alloys) is 29000 ksi, a ksi is 1000 psi
So, springs made of aluminum would need roughly 3 times the area of its steel counterpart to have the same stiffness. Alloy as you can see makes little difference in the initial stiffness. It does play a big part in determining whether a spring can absorb large amounts of stress and stay elastic. Low strength alum in a spring would bend and just stay bent. but the rates would be about the same, since the modulus is about the same.
Or in other words for a given pressure (Psi or Pa) how much it will strain (stretch or compress in length) per unit length.
Its dimensionless. inch/inch
here is some data for various alloys.
3003 and 6061 is 10100 ksi
5456 is 10400 ksi
typ. alum is 10000 ksi
steel(most alloys) is 29000 ksi, a ksi is 1000 psi
So, springs made of aluminum would need roughly 3 times the area of its steel counterpart to have the same stiffness. Alloy as you can see makes little difference in the initial stiffness. It does play a big part in determining whether a spring can absorb large amounts of stress and stay elastic. Low strength alum in a spring would bend and just stay bent. but the rates would be about the same, since the modulus is about the same.
10-16-2003, 07:44 AM
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What initiated the ban in F1 was ...
McLaren's use of aluminum/beryllium calipers. Not only did they cost something like $40k each, but beryllium dust is extremely toxic and hazardous to the poor guy who had to machine the caliper. Where allowed by the rules, though, metal matrix composite (MMC) calipers are still common. My Alcon TA-6 is an aluminum/titanium/ceramic composite, and both AP and Brembo have similar calipers.
BTW: Not wanting to stifle innovation, McLaren then began using a motor with an aluminum/beryllium block. No surprise, that was banned for the following year.
BTW: Not wanting to stifle innovation, McLaren then began using a motor with an aluminum/beryllium block. No surprise, that was banned for the following year.