Thread: small blade
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Old 09-27-2017, 08:27 PM   #4
Join Date: Sep 2017
Posts: 3

Thanks , bone marrow is about 40% water so the Resistance is Velocity sq. And at increased velocity above 150 ft/sec a 1/4 inch and 3/8 inch steel ball cause increasingly explosive damage . Maximum baseball pitching is around 100 mph , 150 ft/sec as is ice-hockey puck . Baseball bat and an ice-puck cause comminuted depressed fractures in skull . The blade of a heavier sword at 2ft would be at twice max arm speed and slices bone like butter or cream .

A mulga blade would have about 18Newtons and a large Indonesian kris sword about 24Newtons.

" For their test subject, the MythBusters crafted a dummy sporting a humanlike head stuffed with brainlike ballistics gel and pig skull.The weapon of choice was a standard household fan with 52-inch (132-centimeter) wooden blades that turned at a top speed of 26 miles per hour (42 kilometers per hour).

Neither jumping directly into the fan nor leaping toward the blades at an angle did much damage to the dummy. At worst, someone might suffer a concussion or a bloody nose, but the blades are too dull and slow to decapitate.

The industrial fan complete with powerful motor and metal blades that whip around at 54 miles per hour (87 kilometers per hour) did more damage. The blades acted like rotating machetes, slicing straight through the neck, jugular and vertebrae. However, since the dummy managed to escape with his head still attached, the original myth remained busted."

Thickness of blade seems to be significant. Swords are 1/12-1/8 inch and mulga blades are bi-convex , 1/4 - 1/2 inch thick at 1/2 inch back from edge. The cutting-tip angle is 60-90degrees , the Toorale skull was struck at about 45degrees and the rear jaw is sliced meaning the blade was turned to dig in . So a wood blade would be very blunt compared with sword.

Were there any cases of wood props causing grooves in skull ?
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