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Rotating Beacon
Checkout Ebay Auctions For The Cheapest Prices
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 GRIMES ROTATING BEACON MISSING LENS TESTED  US $99.95
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 Grimes Aircraft Rotating Light Beacon Lens 31-3379-1 US $25.00
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 Cessna Rotating Beacon US $200.00
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 PIPER / WHELEN ROTATING AIRCRAFT BEACON US $69.00
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 NEW WHELEN WRM-10 ROTATING BEACON LENS US $31.95
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 Beech Baron C55 Rotating Beacon Light P/N 95-364027-17 US $250.00
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Emergency Vehicle Lights
All the Law enforcement Departments, Ambulances and Fire Stations make use of Emergency Vehicle Lights to deal with heavy traffic. These Emergency Vehicle Lights are actually the warning gadgets that are used by the driver to alert people or to make them watchful so that they give you a way. When the driver uses the Emergency Vehicle Lights along with a siren the motorists understand that there is an emergency and they need to move out of the way so that the emergency vehicle can move about.
Emergency Vehicle Lights are even to alert people that a law enforcement officer or any other emergency vehicle is arriving. During the daylight, people can easily recognize such vehicles, but at night the only way to distinguish these vehicles is Emergency Vehicle Lights. The various departments make use of light bars and beacons as Emergency Vehicle Lights. In case of an emergency, the Emergency Vehicle Lights are used along with a siren to make people attentive.
Emergency Vehicle Lights are of different types, but three main varieties that are being employed are LED lights, strobe lights and rotating lights. Mostly the rotating Emergency Vehicle Lights use halogen or incandescent bulbs with a plastic dome over it. Strobe lights use xenon flash lamps and LED lights have light emitting diodes in them. Out of these three variations, LED lights are being used widely as they last for longer time duration. Usually the colors that are being brought into play in case of these Emergency Vehicle Lights are red, blue, green, transparent, white, purple and amber. Every country has its own laws and regulations according to which every emergency and utility vehicle uses the light.
Assortments of Emergency Vehicle Lights
· Emergency Vehicle Lights: These lights are made of polycarbonate lenses with UV and have a lead acid battery.
· Beacons: These beacons are used in the emergency vehicles with halogen main light, screw magnetic installation and have 35 volt power.
· Strobe Beacons: These are small alarm lights with xenon lights that are obtainable in four different colors namely amber, blue, white and red.
· Emergency Vehicle LED Lights: The blue colored lights have LED bulbs and are made up of thermoplastic material. The life of these lights is approximately 50,000 hours along with a twelve volt input voltage.
· Mini Light Bars: These light bars have clear lens, flash pattern clasp switch and 5mm LEDs’.
· Normal Light Bars: These light bars have halogen bulbs, in built speaker and 120 watt power.
· Strobe Light Bars: These strobe lights have four halogen lamps, aluminum bottom and 180 watt power.
· Daytime Light for Emergency Vehicles: These lights provide high brightness, easy installation and are waterproof.
All these exclusive assortments are easily obtainable at reasonable prices in the outlets and online vendors. Online purchasing of these Emergency Vehicle Lights give you an opportunity to select the design and flash pattern according to the requirement, effortlessly. So, opt for reasonably priced Emergency Vehicle Lights from online retailers.
About the Author
Chris Dallman is a managing member of Aspire Sales LLC. The business of Aspire sales LLC has many websites.
Math Lighthouse question?
The beacon on a lighouse 40 m from a straight shoreline rotates twice per minute.
a) How fast is the beam moving along the shoreline at the moment when the light beam and the shoreline are right angles? (Hint: You need to express d_theta / d_t in radians per minute.)
b) In part a, how fast is the beam moving along the shoreline when the beam hits the shoreline 40 m from the point on the shoreline is the closest lighthouse?
Well i know that i can't figure out part b without part A but both questions stump me, I have no idea how to figure out part A and part B has very strange wording.
Thanks a lot all you smart people you! ^^
Let:
A be the lighthouse,
B be the closest point on the shore,
C be the point where the beam hits the shore,
x be the length of BC,
a be the measure of angle CAB.
Then:
(a)
da / dt = 4pi rad/min.
x / 40 = tan(a)
dx / dt = 40 sec^2(a) (da / dt)
= 160pi sec^2(a)
When a = 0, dx/dt = 160 pi
= 502.7 m/min.
(b)
When x = 40m:
dx / dt = 160pi sec^2(40)
= 856.6 m/min.
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