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  #11  
Old 03-19-2010, 11:57 PM
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Actually Marco you had it right, just had the equation flipped. I got it now..

tan60 = 2.25/x

1.732 = 2.25/x

1.732x = 2.25

x = 2.25/1.732

x = 1.299

Man it's all coming back now, I'm never going to fall asleep tonight.. how'd that quadratic formula go again?
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Old 03-20-2010, 12:02 AM
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Quote:
Originally Posted by nakman View Post
Actually Marco you had it right, just had the equation flipped. I got it now..

tan60 = 2.25/x

1.732 = 2.25/x

1.732x = 2.25

x = 2.25/1.732

x = 1.299

Man it's all coming back now, I'm never going to fall asleep tonight.. how'd that quadratic formula go again?
I thought you were drawing it a little different and I am too slow to realize they are both the same anyways...

Then after I posted I saw how you had it sketched.... I thought you were starting with a horizontal line...

too many s
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  #13  
Old 03-20-2010, 08:26 AM
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You aren't making plastic wheel spacers, are you?
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Old 03-20-2010, 09:17 AM
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Originally Posted by 60wag View Post
You aren't making plastic wheel spacers, are you?
as a means to an end, yes. as the final product, probably not.

I am annoyed with wheel shaking on these Chinese spacers I've got. The holes are too big, and there are slots that make the thing not balanced. It's tough to get it in just the right sweet spot, I had them installed well but when I took them off to put the tires on the 80 all of that is shot. I'm hopeful a more balanced wheel spacer will make this better.

But I thought a lot about what kind of compression nylon 12 will see when a lug is torqued to 85 pounds.. once it's smashed in there how much further could it go when a wheel sees side load?
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Old 03-20-2010, 09:47 AM
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The easiest PC mnemonics to remember these are:

Slice Of Ham (s=o/h)
Top Of Apple (t=o/a)
Coat And Hat (c=a/h)

The one you will *never* forget, that my 8th grade algebra teacher taught me, involves what Sally can tell about Oscar, but folks would have a stroke if I posted it here.

Mark
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Old 03-20-2010, 09:54 AM
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I'd be surprized if a slightly off center aluminum wheel spacer would create enough of an imbalance that it'd cause vibration. I think it's more likely that the wheel spacer is allowing the wheel to mount up off center, or out of square. Is the wheel located by the studs, or by the hub in the center? I wouldn't run a plastic experiment at high speed as I bet the lug nuts won't stay tight.

How about adding some rings (sleeves) to the existing spacers to tighten up the bolt holes?
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Old 03-20-2010, 10:08 AM
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The wheel is centered by the studs, by the shanks on the lug nuts, and they're not long enough to penetrate the spacers so I think they're "falling down" behind the wheel. Yeah some little sleeves is another approach, that doesn't resolve the weight imbalance issue but that is likely negligible.

I ran each spacer across some emery paper to remove any high spots.. don't know if that did anything. They seem flat, but I haven't measured.
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Old 03-20-2010, 10:24 AM
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Quote:
Originally Posted by fubuki View Post


Just so all of you know Trig is the reason I am a sales guy......I am very happy there are about 100 engineer's in the group to help Nakman out.
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Old 03-21-2010, 09:47 AM
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(I'm going way back here)

Quadratic function: f(x)=ax^2+bx+c. To find the roots, do the following:
(-b +/- sqroot(b^2-4ac))/2a (?)

BTW, the plane takes off. I proved it with physics.
http://forum.ih8mud.com/chit-chat-se...ne-read-5.html
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Old 03-21-2010, 09:14 PM
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