Quote:
Originally Posted by SkullWorks
where is the FEA on the QA1 rod ends? that is the failure point you should be most concerned with especially if the threads were cut and not roll formed.
anytime you have an anodized surface you really need not worry about galvanic action the base material (Al Mg or Ti) has already been covered in corrosion...er rather an oxide layer.
Is there a reason you aren't having the rods anodized? I know (proprietary grade Al) looks great in type III class 1 undyed anodize this would add to the long term corrosion resistance. I know they said it's better than 6061 for corrosion resistance...but they say 6061 is hard to machine too...
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I got the engineering data from QA1 and I have experience with other rod ends (Aurora) for the same application and the QA1 is rated for a higher load capacity and lighter. Therefore I didn't think it was necessary to do the FEA. The aluminum parts will be clear anodized, I didn't do it for the prototype since it's a fixed cost to dip everything in the bath at once. No need to do it for one part that's just made for testing.
Quote:
Originally Posted by Calum
I see your point. You need to keep the hole in the knuckle in compression axially, without putting too much radial force on it. A slight irregularity in the facing of either a nut or spacer could cause uneven loading. A thou difference in height, in either direction, could change the engagement force on the shank from loose to welded on... poop
For anyone wondering, many ships, even navy ships, use nothing more then a close tolerance taper to hold their propellers on.
Edit. To reduce the tolerance issues, could you keep the top half of the original design but with an internal thread and a bolt vise a nut from the bottom? I'm guessing there wouldn't be enough material but I had to ask.
Anyway, I think I'm done. Thanks for listing to my ramblings.
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I don't think I understand... sorry. You guys are sure keeping me busy, I wanted to do some more FEA analysis on our rear lower control arm and start on our trailing arm. ;P