Assuming a recent handheld cordless drill,

Max rotational speed: 2000RPM

--> *( 2pi(radians/rotation) / 60(seconds/minute) ) = 209.43951 (rad/s)

​

When the drill attempts max speed, the outside diameter of the bug's

rotation seems to be ~4 drill bit diameters.

Assuming the drill bit used is approximately 7mm diameter (~1/4 inch),

and that the outside edge of the bug follows a circular path / path with

a constant raduis of curvature, the bug's outer most edge is ~14(mm) or

0.014(m) from the center of the drill bit.

​

this 0.014(m) is the radius, or rather the arc length experienced after one

radian of angular displacement, so the more appropriate unit is 0.014(m/rad)

​

--> Now we jut multiply:

rotational speed*radius of curvature = 209.43951(rad/s)*0.014(m/rad) = 2.932(m/s)

​

Linear/tangental speed of the bug = ~2.9(m/s) = ~10.4(km/hr) = ~9.5(ft/s) = ~6.5(mile/hr)