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Here you can see we ran a rib all the way down to the other side of the cross brace so the seat belt pulls on both sides of the cross brace in the unfortunate event it is ever called upon to be used.
http://www.clubcobra.com/photopost/d...01_Medium_.jpg |
In this shot you can see we billeted the seat belt mounting point directly into the cross brace.
http://www.clubcobra.com/photopost/d...02_Medium_.jpg |
I will post more pics as I find them. The latest thinking is we will test drive sometime late next week. I certainly hope so.
David :):):) |
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David :):):) |
I thought just maybe you were fitting it up to this chassis so it would be ready for the "next one".....
Bob |
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David :LOL::LOL::LOL: |
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David :):):) |
Great Job David. True toolmaker wookmanship. Are you going to leave the cutter marks or polish them out. I think it looks good leaving the cutter marks.
Carmine. |
carmine,
Thanks for the kind words! On the control arms we will probably polish them to a mirror finish. But, I agree, I think the tool paths look pretty cool too. David :):):) |
Believe it or not, on Wednesday, we took the entire chassis apart to clean in inside and out. We had to get the tapping oil out of the holes so the Loctite would stick.
http://www.clubcobra.com/photopost/d...42_Medium_.JPG |
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One of the main rails coming in from the pressure washer.
http://www.clubcobra.com/photopost/d...41_Medium_.JPG |
This is a really cool part. This is one of the push rod rockers. If you look very closely, we use bearings for the rocker to pivot on. WE DO NOT PIVOT ON BOLTS!!!
http://www.clubcobra.com/photopost/d...47_Medium_.JPG |
See the little bushings on the inside of the cut out of the rocker. Those bushings ride on the bearing race on the outside and on the chassis on the inside. The bolt then goes through the assembly and bolts the bearing race solidly to the chassis. That way when the rocker pivots, it pivots on the bearing and NOT on the bolt. Pivoting on a bolt is very, very bad as the bolt will eventually wear out and then you will get to go for a fun ride as your suspension falls off. :eek:
http://www.clubcobra.com/photopost/d...49_Medium_.JPG |
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Here are the differential side axles. Notice they are set up for CV joints. They are made out of 17-4 as well.
The original 427 Cobra had plunging 1/2 shafts which bound up seriously if you accelerated out of a corner while the suspension was still loaded. CV's were invented to solve that problem. http://www.clubcobra.com/photopost/d...52_Medium_.JPG |
Today Sandwich fitted the 1/2 shaft axles to the car. This is how you do it. You take a Porsche axle, cut it, put a sleeve over it and then fit it to the CV joints. You then hold the suspension at ride height and adjust the length of the axle so that the CV joints are 1/2 way through their plunge ON BOTH CV JOINTS!!! Tack weld. Rotate the hub to make sure nothing is binding AT FULL DROOP AND AT FULL BUMP. Measure the axle. Then MAKE IT! YEA!!! (But, just to be sure, you need to make it out of aluminum first :LOL: )
http://www.clubcobra.com/photopost/d...53_Medium_.JPG |
Then on to the good stuff...17-4 PH.
First, you spline the ends of the shaft. We are really lucky because we have a 3 axis lathe that can do splines. Then, you can see Sandwich made a special "driver" to drive the splined end of the axle. We turn the axle between centers then. You have to make the splines first to that you can take ANY non-concentricity out of the axle when you make it. By turning between centers, the shaft is made really concentric. This is our war horse Haas CNC lathe. It has seen some very hard use over the years and it still holds 0.0002 inches. I am pretty impressed with it. So much so, I bought 4 of them! And several mills too. http://www.clubcobra.com/photopost/d...55_Medium_.JPG |
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