Bow Drill Ember in Reverse

Just having some fun, but this turned out to be a good illustration of the venturi notch, as it was definitely putting out (or in this case, pulling in) a lot of smoke. The set was red alder on red alder.

More info on the set and photos here…https://bushcraftusa.com/forum/threads/friction-fire-tuesday.44962/page-141#post-3606927

More info on the venturi hearth here… https://bushcraftusa.com/forum/threads/supercharging-your-ember.210268/