that's not much of a rant.

I believe they are linear based on the fact all the numbers I've seen have only a single value. And cutting springs is almost always a bad thing to do, there are a few exceptions but I doubt his car is one of them.

Any cut spring will be stiffer than what it was before it was cut, progressive, linear, doesn't matter. Fact is, when you remove a coil you remove length from the spring, which makes it stiffer.

Not suprised.
-Michael-

you sure about that?

Well, as long as you remove it from the correct end if they aren't symmetrical.

Yes, think of a spring uncoiled, a solid rod, If you grab it on the ends and try to bend it it's easy. If you then chop off two inches on either side and then grab it on the ends and try to bend it it's much harder.

Not sure what you mean by "how did this guy become moderator". Yah, he's a moderator on a heavily moderated forum but it's not like he passed some kind of certification or job interview to get that title.

Getting information off internet forums requires skill in extracting the real content from the bullshit and missinformation. That's expected regardless of who posted it (moderator or otherwise).

I like Gord, he's Canadian.

Much...welcome :)

one of my post got edited in a "what don't you like about your na, and be honest" thread, I wrote "not enough room to have sex unless your flexible ;)"

and that got deleted with "lets no go there"

ah well...didn't really bother me, but since somebody was ranting hehe.

I've never had a problem w/ Gord?

I think you're wrong. The spring constant (stiffness) is still the same as before, you just have less distance to travel before hitting the bump stop. Think of it this way... I have a spring that takes 300 lbs to compress 1 inch. Now then, I cut 2 inches off the end without changing anything else about the spring. Now I have a spring which still takes 300 lbs to compress 1 inch, it's just shorter. The only way to change the spring rate is by changing the metallurgy, the coil diameter, etc.... not the length.

Sorry guys, but the spring constanst of a helicoil DOES in fact relate to the number of coils. More specifically, to the number of active coils. If you need something to play with to convince yourselves:

http://www.engineersedge.com/spring_comp_calc_k.htm

But you can check any mechanics book past a kindergarten level.

Nope. Making a spring shorter increases the stiffness.

Imagine you unwound a coilspring and stuck one end in a vise. You apply a given force (say, 200lbs.) to the end of it (let's say it's 4 feet long unwound) and it deflects one inch. You have a 200 lb. spring.

Now, chop a foot off of it. Now it takes more than 200 lbs. to deflect that same spring one inch. You've made the spring stiffer.

Positive.

That's actually a really good explanation. Took me nearly 2 paragraphs to explain what you did in 2 sentences. :sadwavey:

Are you guys really having a "cut springs" arguement? For Pete's sake, we're better than that over here. Now knock it off and stick to Gord bashing.

And the problem is what? Learning is good!

It did start to take on the air of .net. Please accept our most sincere apologies.

When did posting correct information go out of style?

It's not the discussion itself...it's the method of bickering.

Ah that's what happens when people can't even entertain the idea that they might be wrong.