FBM Balance

Cobalt

Cobalt

Platinum Member
Joined
Dec 23, 1998
Messages
17,279
Not sure if any of you have compared, but I noticed the other day while playing around with both the CG and the LE FBM's, that the balance point of the CG FBM is about 3/4 of an inch in front of the ricaso, while the balance point of the LE is about 5/8 of an inch behind the CG's balance point. I had suspected this based on the feel of both knives.

I verified the feel with my wife. I had her hold both knives and tell me which one is heavier. She of curse said the CG. It took me several minutes to explain to her that the reason why it "FELT" heavier is because the center of mass is further forward causing a larger moment on her wrist making the knife feel heavier when it in fact is not.

Then I looked at the knives closely and noticed where they differ aside from the grooves that add weight to the CG's blade. Pretty cool.:thumbup:
 
Thats some nice tech know-how there Cobalt, and I'm sure you explained that 'FEELING' to her in a very good way as well :), I know of people I wouldn't dream of mentioning that too, they would just NOT understand :p
 
Cobalt is trying to Boost the last LE change sale~

:D :thumbup:

Everyone still remember FBM will be gone in this week any time now. :cool:
 
LE VS CG....... lets see it cobalt. since #14 is a user, maybe if you could do a 2x4 test for us. I say 2x4 since it should be much more consistent than a log you find in terms of how many chops it takes......please;)
 
If I had to guess, I would say that the CG will be a better chopper for it's weight, ecause of it's CM being further out into the blade, but who knows for sure.

And yes, I was nice and diplomatic when I explained it to my wife. Something like "how many times do I have to repeat myself..." or something along those lines.

#14 is not a user. There was one person that actually wanted #14 for special reasons so I had them order me another one from the shop and I will send them #14.
 
Cobalt said:
Then I looked at the knives closely and noticed where they differ aside from the grooves that add weight to the CG's blade. Pretty cool.:thumbup:
Click to expand...

How do you figure that the grooves add weight to the CG?

And thanks for #14! :thumbup: :cool:
 
resinguy said:
How do you figure that the grooves add weight to the CG?
Click to expand...

This is why puncuation matters. Here's his sentence as it was, and then as it should be with proper puncuation:

Then I looked at the knives closely and noticed where they differ aside from the grooves that add weight to the CG's blade.

Then I looked at the knives closely and noticed where they differ, aside from the grooves, that add weight to the CG's blade.

Of course, the clearest would've been:

Then I looked at the knives closely and I noticed the differences that added weight to the CG's blade.
 
David E said:
This is why puncuation matters. Here's his sentence as it was, and then as it should be with proper puncuation:

Then I looked at the knives closely and noticed where they differ aside from the grooves that add weight to the CG's blade.

Then I looked at the knives closely and noticed where they differ, aside from the grooves, that add weight to the CG's blade.

Of course, the clearest would've been:

Then I looked at the knives closely and I noticed the differences that added weight to the CG's blade.
Click to expand...


I have no idea what you are trying to say.
 
The grooves aren't ground into the bevel on the FBM, the corrugations are "left sticking out" of the bevel during manufacture, so they add weight to the blade.
 
CG is a saber grind, and LE is full flat, so is the LE lighter? What are the weights of each?
 
The LE is definately heavier, but much of that weight is in handle, which isn't drilled or nuttin to lighten weight.
 
David E said:
This is why puncuation matters. Here's his sentence as it was, and then as it should be with proper puncuation:

Then I looked at the knives closely and noticed where they differ aside from the grooves that add weight to the CG's blade.

Then I looked at the knives closely and noticed where they differ, aside from the grooves, that add weight to the CG's blade.

Of course, the clearest would've been:

Then I looked at the knives closely and I noticed the differences that added weight to the CG's blade.
Click to expand...

David has my cryptic sentence figured out. "ASIDE" from the grooves. The LE has an extra hump on the spine in the back that makes the back of the blade wider and adds weight. This changes the balance completely and it looks better also.. It is much heavier than the CG but it does not appear so.
 
Here's a Busse doing some balancing.

Hunting057.jpg


Hunting056.jpg


Helle
 
Cool Balancing Acts, simple, direct, possibly even a little Dramatic.

Graphic demonstration of differing Balance.

How much different do the throw?

Thrown from the handle I would expect faster rotation form the CG.

Thrown from the blade I would also expect the CG to be easier.

Blade heavy knives seem to throw easier.

The Angled handle knives that I have thrown, are blade heavy (Mostly the E models) and rotate faster when thrown by the handle.
 
Broos said:
CG is a saber grind, and LE is full flat, so is the LE lighter? What are the weights of each?
Click to expand...


My LE weighs in at 847 grams / 1 lb 13.8 oz

CG weigh in at 751 grams / 1 lb 10.5 oz.

That's alot of INFI

measured on my little postal scale, POS operator
 
its worth noting that the handle tang makes a really big difference in the overal ballance of these two models. consider that with the blades, your getting a triangular cut out of extra blade steel that extrends from the edge to the spine.

whereas with the handle slabs, you get a solid flat extra 1/8" (or whatever the extra is). this flat layer can have an offbalancing effect to the extra metal thats added to the blade, even though its larger in surface area.

as an example - take two peices of flat bar stock, one thats 1lb, and the other thats 14oz. now hammer the 14oz peice of bar stock into a wedge. the 14oz piece looks like its way bigger, but the flat bar stock is still heavier, and takes up less visible space.


also the tube fasteners are longer on the LE grade :D:rolleyes: :D

I have found that the basic 9 consistently feels like a better more directly designed chopper because of its partial full tang handle. having the weight taken off the handle area makes a huuuuuuuuge difference in how blade heavy it is.


I owned a heavy heart, and a hogfsh - and the heavy heart felt like a better "chopper" even though the hogfsh felt heavier. the difference being that the hogfsh (if you know what your looking for) feels like it would sink in deeper because of the overall weight, as long as you hit it in its sweet spot, allowing for the entire weight of the blade to hit the center of percussion without losing momentum to a turning of the blade (handle or tip direction). the heavy heart wouldnt have been able to put as much backing weight behind a good chop as the hogfsh, even though it felt like it could.
 
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