Assertion: boomerang | /r/HasAspect | turbulators—bumps
Facets:
value: on the top surface
type: LOCATION
Source sentences:
text: Some boomerangs have turbulators—bumps or pits on the top surface that act to increase the lift as boundary layer transition activators (to keep attached turbulent flow instead of laminar separation).
text: Some boomerangs have turbulators — bumps or pits on the top surface that act to increase the lift as boundary layer transition activators (to keep attached turbulent flow instead of laminar separation).