MAIN LANDING GEAR (MLG)

Posté le 21 décembre 2008 de Toni G.

Aircraft main landing gear

Figure 1-11 Main landing gear. conventional type.

The tricycle gear is more stable during ground operations and makes landing easier, especially in crosswinds. It also maintains the fuselage in a level position that increases the pilot’s visibility. Nearly all Navy aircraft are equipped with tricycle landing gear.

A main landing gear assembly is shown in figure 1-11. The major components of the assembly are the shock strut, tire, tube, wheel, brake assembly, retracting and extending mechanism, and side struts and supports. The shock strut absorbs the shock that otherwise would be sustained by the airframe structure during takeoff, taxiing, and landing. The air-oil shock strut is used on all Navy aircraft. This type of strut is composed essentially of two telescoping cylinders filled with hydraulic fluid and compressed air or nitrogen.

Source: http://www.tpub.com

NASA QAT – Quiet A/C Technology

Posté le 7 décembre 2008 de Toni G.

NASA courtesy – Click on the link below to watch the video (+ script in the footer caption):

NASA quiet aircraft technology

DEW and FROST

Posté le 4 décembre 2008 de Toni G.

U.S. Air Force photo by Master Sgt. Keith Brown

ELMENDORF AIR FORCE BASE, Alaska – Members of the 703rd Aircraft Maintenance Squadron de-ice a C-17 Globemaster III from the 517th Airlift Squadron before a training mission. Heavy snow and weeks of sub-zero temperatures require extra effort from maintenance crews to keep the aircraft clear of ice and snow. The training mission included dropping Army Airborne Soldiers from Fort Richardson, Alaska, and conducting air drops of training bundles that simulate the Soldier’s equipment. (from AIR FORCE LINK)

DEW

Dew does not actually fall; rather the moisture condenses from air that is in direct contact with the cool surface. During clear, still nights, vegetation often cools by radiation to a temperature at or below the dew point of the adjacent air. Moisture then collects on the leaves just as it does on a pitcher of ice water in a warm room. Heavy dew is often observed on grass and plants when there is none on the pavements or on large, solid objects. These objects absorb so much heat during the day or give up heat so slowly, they may not cool below the dew point of the surrounding air during the night. Another type of dew is white dew. White dew is a deposit of white, frozen dew drops. It first forms as liquid dew, then freezes.

FROST

Frost, or hoarfrost, is formed by the process of sublimation. It is a deposit of ice having a crystalline appearance and generally assumes the form of scales, needles, feathers, or fans. Hoarfrost is the solid equivalent of dew and should not be confused with white dew, which is dew frozen after it forms.

Source: www.tpub.com

HOW AIRPLANES FLY ?

Posté le 2 décembre 2008 de Toni G.

What makes an airplane get off the ground and stay in the air? Easy to understand, the film combines animation and live sequences to explain everything about basic aerodynamics. Forces of lift, weight, thrust and drag are shown in relation to flight.

Boeing Posts Lower Third-Quarter Results on Reduced Commercial Deliveries

Posté le 27 octobre 2008 de Toni G.

Third-quarter revenues declined to $15.3 billion from $16.5 billion as labor strike and supplier production problems pushed airplane deliveries out of the quarter.
EPS declined to $0.96 per share, reduced by an estimated $0.60 on the lower deliveries and by $0.08 due to tax adjustments.
Backlog grew to a record $349 billion as near-term demand remains strong.
Updated financial guidance to be provided after strike concludes.

BOEING courtesy (www.boeing.com)