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The draw knife

The folks at the Combe Lumber Camp use these to strip bark from felled trees before aging them. A carpenter like me who works on milled timbers uses it a lot less, but it's still a key part of my toolbox, as it's used to shave corners and edges off of timbers to shape them. Safety is important with these since you're pulling the blade toward yourself.

Materials: printer paper, mechanical pencil, Permacolor plastic eraser, Staedtler pens

Referencehttps://i2.wp.com/makezine.com/wp-content/uploads/2016/06/drawKnife_1.jpg?resize=1200%2C670&strip=all&ssl=1

Construction: Here are the earlier steps, showing how this is assembled in perspective from (a surprisingly large number of) primitive forms.

Step 1: constructional forms in pencil

Step 2: pick out the silhouette outline (harder than it seems, so many lines):

Step 3: remove the pencil lines, revealing all the mistakes (notably the angle of the right handle):

Step 4: add contours, shading, line weight, and textures; this is where I messed up the blade edge

Source: 
my own work