(1) This method is based on the fact that as a feather grows, alternating light and dark bands appear across its vane .

(2) Unlike the compass, the vane was clearly a scientific instrument, though the sort that comes in the Home Weather Kit you might give your dad shortly after his retirement.

(3) The vane on one side of the feather's spine was wider than the one on the other.

(4) This rigid plastic curled vane can be taped or glued to the arrow shaft using a normal fletching jig.

(5) Their angle of attack should be very small just to ensure that the air flow comes to the same side on each vane .

(6) Feathers and vanes work about equally well with less-powerful target crossbows.

(7) Other feather types similar in some respects to down and vaned feathers while unique in others include filoplumes, bristles, and semiplumes.

(8) The first uses multiple airfoil-shaped vanes arrayed around the inner circumference of the exhaust side of the turbo housing.

(9) Advanced technology means the giant vanes of the turbines swivel to search for wind but cut out in stormy conditions.

(10) Does this not suggest that early feathers must have had pennaceous vanes at least distally, if the downy bases, or down feathers, were to be effective for insulation?

(11) The wind or air rising through the turbine turns the vanes in the turbine and gets the air moving near the top of the house, drawing moisture out.

(12) All turbine products are similar in that they derive their energy from the action of blades or vanes that spin in response to a force applied upon them.

(13) Early views of Sydney were dominated by the sails of the ships which had propelled the newcomers across the oceans and by the vanes of the windmills which provided the settlement with its first forms of industrial power.

(14) A knowledgeable friend told me, that is also very interesting to pay attention to the position of the windmill vanes when they are at rest.

(15) Furthermore, in the vaned diffuser, the secondary flow directed from the suction surface to the pressure surface of the vanes is prevented.

(16) The obtained results demonstrate that the centrifugal pump with the optimized vaned diffuser has compact size compared with the original one while the performance requirements have been met.

(17) In the vaned impeller, the fluid undergoes an abrupt acceleration and change of direction as it enters the rotor.

(18) For fletching there are two options: either plastic vanes or real feathers.

(19) He also tested and fitted lightning conductors, vanes and weather cocks on the tallest of buildings.

(20) Centrifugal compressors use a vaned rotating disk or impeller in a shaped housing to force the gas to the rim of the impeller, increasing the velocity of the gas.