It’s a bird! It’s a plane! No… It’s a blimp!
- Blimps are aircraft with no inside framework used for support.
- Blimps lift due to high pressure and helium pumped in the balloon.
- The only solid parts of a blimp are the gondola, where the passengers are, and tail fins used for stability.
- Blimps require propeller motors for steering mobility.
- Some blimps were used for patrolling purposes for the United States Navy in the World War I period.
- Blimps are commonly used for advertising purposes, and some blimps have 1000s of LED lights on them to shine messages.
- Blimps are often deflated in transportation processes.
- The term ‘blimp’ only refers to aircraft that free fly in the air.
- The term ‘blimp’ is a mix of the original British word for blimp, limp, and the most common type of blimp class, B, thus creating ‘blimp’.
- In 1925, Goodyear Tire and Rubber created the blimps we now know today.
Blimp 28 February 2013 , Wikipedia, <http://en.wikipedia.org/wiki/Blimp>
Freudenrich, C N.d., Blimp, How Stuff Works, <http://science.howstuffworks.com/transport/flight/modern/blimp.htm>
Lets shorten Assault Amphibious Vehicle to AAV.
- AAVs are used for land and sea military operations, generally around the beach.
- The marines call AAVs “amtracks”, which is short for amphibious tractor.
- An AAV was originally known as a “Landing Vehicle, Tracked, Personnel-7” or LVTP-7.
- AAVs are generally equipped with a grenade launcher, a heavy machine gun, crew radios, and an intercom system.
- AAVs have the capacity to hold 21 equipped troops, and four crewman – the driver, commander, gunner, and a rear crewman.
- AAVs were originally LVTD-7s which were first made in 1972 and converted to AAV-7A1s in the 1980s.
- An AAV-7A1 weighs 29.1 tons (26.4 tonnes), and is 7.94 meters (26 feet) in length, 3.27 meters (10.7 feet) in width and 3.26 meters (10.7 feet) in length.
- The AAV-7A1 can travel over speeds of 24.32 km per hour (15 mph) off road, 72 km/h (45 mph) on road and 13.2 km/h (8.2 mph) in water.
- The replacement cost of an AAV is over two million dollars.
- The Expeditionary Fighting Vehicle (EFV) was due to replace AAVs in 2015, but the plans have been cancelled.
Assault Amphibious Vehicle 7 February 2013, Wikipedia, <http://en.wikipedia.org/wiki/Assault_Amphibious_Vehicle>
LVTP7 Landing Vehicle, Tracked AAVP7A1 Assault Amphibian Vehicle Personnel April 14, 2000 , FAS, <http://www.fas.org/man/dod-101/sys/land/aavp7a1.htm>
It’s a bird! It’s a plane! No… It’s a helicopter!
- Helicopters are aircraft that can fly horizontally, vertically and can hover.
- Helicopters are a type of rotorcraft, which enables them to land almost anywhere, because the rotor blades allows the copter to fly vertically.
- Helicopters are also known as choppers, whirlybirds and helos.
- Helicopters have their origins in children’s flying toys, made from bamboo as early as 400 BC.
- Many vertical flying ideas have been experimented with over the centuries and the term ‘helicopter’ was coined for a machine, that did not lift off the ground, in 1861.
- The first ‘flight’ of a helicopter occurred in 1907, and the first full scale production helicopter was designed by Igo Sikorsky in 1942.
- Helicopters are used for, but not limited to, transportation, military, health and safety, construction and tourism.
- Helicopters move slower than most aircraft since the rotor blades’ speed depends on the speed of the copter.
- If helicopters are unsafely operated, helicopters could go out of control or crash and end in serious consequences.
- Up until 2012, the deadliest helicopter crash was a shoot down of a Mil Mi 26 over Chechnya, which killed 127 people.
Helicopter 5 February 2013 , Wikipedia, <http://en.wikipedia.org/wiki/Helicopter>
A cement mixer… on wheels!
- Cement trucks are also known as concrete trucks. They have a drum on the top of the truck which holds concrete.
- Cement trucks mix concrete in the drum with sharp blades to prevent the concrete from turning hard.
- Cement trucks typically pour concrete down long chutes to the site where it is needed.
- The drum on cement trucks turn in one direction to mix the concrete, and the opposite direction to pour concrete out of the drum.
- Long pipes and concrete pumps are used if the cement truck’s chute can’t reach the area that needs to be concreted.
- The first patent application for a cement truck was filed by Stephan Stepanian in 1916.
- Cement trucks generally weigh between 9,070 – 13, 600 kg (20,000 – 30,000 pounds).
- Cement trucks carry approximately 18,100 kg (40,200 pounds) of concrete.
- Most of the time, concrete needs to be delivered from a cement truck 90 minutes after been loaded in the truck.
- Cement trucks typically have a steel barrel, but some new trucks use fibreglass.
Concrete Mixer 4 January 2013, Wikipedia, <http://en.wikipedia.org/wiki/Concrete_mixer>
Graham, 2006, On the Building Site , QED Publishing, United Kingdom