It doesn't say who it was assigned to. Was that the C&A patent?SchmidtMotorWorks wrote: ↑Tue Feb 13, 2018 10:23 pm Read this
https://www.google.com/patents/US6502480
Aluminum Rod material?
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Re: Aluminum Rod material?
Re: Aluminum Rod material?
Code: Select all
Inventor
Bruce K. Walker
Raymal Childs
Original Assignee
Bruce K. Walker
Raymal Childs
Priority date
1998-11-16
Heat is energy, energy is horsepower...but you gotta control the heat.
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Re: Aluminum Rod material?
Rocky Childs did a lot of testing on this subject and passed to to us years and years ago. Bear in mind I'm relying on my memory here. We wasn't paying me enough to write it down.
7075-t6 has 75,000 tensile @ ambient temp, and 27,000 @ 320 degrees oil temp. A SB Chev, at the time, would hit 280/300 and the drop was down to about 68,000.
Once you go past 300 tensile strength drops precipitously.
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Re: Aluminum Rod material?
In-Tech wrote: ↑Sat Feb 17, 2018 1:31 amCode: Select all
Inventor Bruce K. Walker Raymal Childs Original Assignee Bruce K. Walker Raymal Childs Priority date 1998-11-16
That's what I thought. The patent on that material was held by the forging company, and he suggested it's use to Bruce. He told Goodwin the same thing.
and then trouble ensued.......or so I was told.
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Re: Aluminum Rod material?
Mark O'Neal wrote: ↑Sat Feb 17, 2018 1:44 amIn-Tech wrote: ↑Sat Feb 17, 2018 1:31 amCode: Select all
Inventor Bruce K. Walker Raymal Childs Original Assignee Bruce K. Walker Raymal Childs Priority date 1998-11-16
That's what I thought. The patent on that material was held by the forging company, and he suggested it's use to Bruce. He told Goodwin the same thing.
and then trouble ensued.......or so I was told.
Unless I have it mixed up with another one, this is what AJPE was using on nitro rods when his were the only game in town that worked.
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Re: Aluminum Rod material?
IIRC it was available from a Russian supplier at one time and not all that expensive.Momus wrote: ↑Wed Feb 14, 2018 1:35 amInteresting. No vendors available for that material according to Mat Web. May be another experimental material that is good in compression but severely anistropic and or only produced in 10000 Kg mill quantities at many times the price of 7075.SchmidtMotorWorks wrote: ↑Tue Feb 13, 2018 10:23 pm Read this
https://www.google.com/patents/US6502480
The patent also expired 3 years ago due to non payment.
There is a lot of material and metal treatment science going on there that never makes it around the world much.
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Re: Aluminum Rod material?
Rocky Childs held the rights to the Childs and Albert aluminum rods, even after the business was sold to Bruce Walker and the forgings came from Alcoa. As I recall, the C & A aluminum rod business was sold to Connie Kalitta shortly before Rocky's death.
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Re: Aluminum Rod material?
300F degrees? you're taking road racing or oval track?Mark O'Neal wrote: ↑Sat Feb 17, 2018 1:36 am
7075-t6 has 75,000 tensile @ ambient temp, and 27,000 @ 320 degrees oil temp. A SB Chev, at the time, would hit 280/300 and the drop was down to about 68,000.
Once you go past 300 tensile strength drops precipitously.
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Re: Aluminum Rod material?
Aren't they kinder to the bottom end when high cylinder pressures are expected?
I was a little surprised when I found out that WRC engines used (used to use) aluminum rods, but this was in a highly turbocharged 400- 500ft-lb torque 2 liter endurance engine application. RPM limited by the intake restrictor so effectively no power over 5000-6000rpm, they weren't using them for RPM capability!
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Re: Aluminum Rod material?
No...lol. I'm talking about 300 degrees. It really doesn't matter much how you get there. But what I typed was not what I meant. Little Chevy's about 200. Giant journals. like the Windsor for the 280/300.Truckedup wrote: ↑Sun Feb 18, 2018 7:56 am300F degrees? you're taking road racing or oval track?Mark O'Neal wrote: ↑Sat Feb 17, 2018 1:36 am
7075-t6 has 75,000 tensile @ ambient temp, and 27,000 @ 320 degrees oil temp. A SB Chev, at the time, would hit 280/300 and the drop was down to about 68,000.
Once you go past 300 tensile strength drops precipitously.
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Re: Aluminum Rod material?
Metallurgy advances like paint drying, it happens but you don't notice it if you aren't involved in it. All of the alloys mentioned in this thread are old and well known, some are not available anymore due to a limited market for them.
Ranging wildly astray from the OP query is more current info about top shelf aluminum structural materials. It comes from research done in industry and academia worldwide for obvious reasons: it's not for go fast cars.
Current UTS levels are in the 95 ksi range, special processes produce above 110 ksi.
Now the engineers here can start the specific strength, etc. comparisons.
Ranging wildly astray from the OP query is more current info about top shelf aluminum structural materials. It comes from research done in industry and academia worldwide for obvious reasons: it's not for go fast cars.
Current UTS levels are in the 95 ksi range, special processes produce above 110 ksi.
Now the engineers here can start the specific strength, etc. comparisons.