I wonder if the fact that the blade is sorta sliding across the wood creates a slicing action of sorts..even if its not the same as the skewed "shearing" action. Now I really need to go mess with my ramped board some more.
(says the guy who just yesterday went on and on about how he doesn't think it does that much ...maybe I've just started taking it for granted)
Woodworking is terrific for keeping in shape, but it's also a deadly serious killing system...
Nah, I still think Joey has a point. The ramp certainly negates the nice skew that Rob spent millions perfecting. To recreate the skew on a normal bench plane you would need to either raise the back of the plane or raise the front of the board. On Derek's ramped shooting board, the back is raised which does nothing for a sheer cut (so I agree with this part).
However with the forward skewed Veritas plane combined with a rear raised shooting board, you may as well just use a No.51.
Anyway that's how I see it but it is Hump Day so anything is possible.
"If you have all your fingers, you can convert to Metric"
Yeah, I don't agree with blind faith either.
I'm not sure this is correct though Chris. I'm not disagreeing that it might have *some* cancelling effect, but skewing the work and skewing the blade in relation to the forward motion of the plane are 2 different things, right? Regardless of how you skew the work, the blade is still skewed in relation to the motion of the plane...its still lowering the effective angle and its still taking a shearing cut. As far as I can tell skewing the work would only effect the cut at entry. Though, I've been known to be wrong before. I guess my only point is that the skewing of the work and the skewing of the blade in relation two the direction of motion are doing to different things....this may be a totally moot point in practice though.
Last edited by Chris Griggs; 08-28-2013 at 11:18 AM.
Woodworking is terrific for keeping in shape, but it's also a deadly serious killing system...
OK, my theory:
The ramp adds extra travel to the shooting process. lets say that you are shooting a 4" board and the ramp surface drops 1" over the 4". you have effectively pushed the plane 4" along the edge and 1" across the edge. If the amount of work (energy to make the cut (Force x Distance)) is conserved then it would feel easier. You have extended the distance by 25% so the force would drop 25%.
My numbers are an extreme exaggeration and my theory is probably wrong anyway but maybe someone else can correct me.
Gary
Woodworking is terrific for keeping in shape, but it's also a deadly serious killing system...
You'd actually be shrinking the distance.
Think of a ramped board like the hypotenuse of a right triangle. The hypotenuse is always longer than the base. In essence, let's say you have a 4 inch board on a ramped board 1 inch up. Lying flat, your plane has to travel 4 inches to cut a 4 inch board. Lifted up on that 1 inch fall, though, you only have to move the plane 3.87 inches.
A^2 + B^2 = C^2
In this case, we know A and C. . .1 and 4. So 1 + X = 16. X = 15, and we know X is a squared number. Sqrt 15 = 3.8729833462074168851792653997824.
At least, that's my understanding.
The Barefoot Woodworker.
Fueled by leather, chrome, and thunder.
I am confused, does the ramp increase the skew or does it decrease the skew of the blade?
Guess a cup of coffee and a bit of thinking about this is in order.
jtk
"A pessimist sees the difficulty in every opportunity; an optimist sees the opportunity in every difficulty."
- Sir Winston Churchill (1874-1965)
Has Rob or anyone at LV indicated that they're going to offer a corresponding shoot board?
Where did I put that tape measure...
Hi Gary -
No - we won't make a shooting board, there are boards already out there that this plane will fit. We will be releasing a track for planes to run in, and are working on a precision fence/head system that will allow people to make what they want.
Cheers -
Rob