by guest » Wed Jun 18, 2008 2:44 pm
Heres more:
Proposed Huge Boeing Pelican Aircraft
Its payload would be more than an order of magnitude greater than that of a C-5 Galaxy.
This article has comparisons to other existing aircraft as well:
The Boeing Co.'s proposed Pelican transport aircraft would dwarf the largest plane now flying, the Russian-built Antonov An225.
The An225 has a 290-foot wingspan, which would be more than 200 feet shorter than the Pelican's preliminary wingspan design of 500 feet. It is 275 feet long, compared to the Pelican's projected length of more than 300 feet. And its cargo-hauling capacity, 275.5 tons, would be only a fraction of the Pelican's as-designed 1,400-ton payload.
The Daily Telegraph has an artist's rendering here.
The Pelican will be designed to fly 50 feet above the ocean, using the buoyant aerodynamic effect of flying close to the water to provide its maximum economic range.
The BBC says Boeing hasn't yet committed to building it.
Here's the best article on the prospects for the Pelican.
Update: Some additional clarification from the Pelican Program Manager.
Other than cruising at low altitude above water, the Pelican has little in common with historical Russian wing-in-ground-effect (WIG) aircraft. The Russian WIGs were designed primarily for short range, sea-based military missions. With beefy structure and ample propulsion systems for water operations, they were no more efficient than modern subsonic transports, despite their lower speed.
The advent of computer-based flight controls permits the Pelican to be land-based, so that it can be much lighter and aerodynamically cleaner than earlier WIGs. It appears, remarkably, that land-based WIGs differ little from aircraft optimized for conventional cruising altitudes. This permits a dual-mode aircraft to provide substantial operational benefits in the long-range transport of cargo.
Advanced flight control systems also provide ample maneuverability while automatically maintaining safe clearance from the water.
� Blaine K. Rawdon, Pelican Program Manager, San Pedro, Calif.
Pelican would fly on a cushion of air.
Riding on top of a cushion of air, the Pelican would experience 70 percent less drag than a normal plane, allowing it to travel further while using the same amount of fuel. The wing-in-ground effect occurs at an altitude equivalent to 10 percent to 25 percent of the wing�s width at the point where it joins the fuselage. The phenomenon increases the ratio of lift to drag for a wing.
"It�s an effect that provides extraordinary range and efficiency," says John Skorupa, senior manager of strategic development for Boeing Advanced Airlift and Tankers. "With a payload of 1.5 million pounds, the Pelican could fly 10,000 nautical miles over water and 6,500 nautical miles over land.
Heres more:
Proposed Huge Boeing Pelican Aircraft
Its payload would be more than an order of magnitude greater than that of a C-5 Galaxy.
This article has comparisons to other existing aircraft as well:
The Boeing Co.'s proposed Pelican transport aircraft would dwarf the largest plane now flying, the Russian-built Antonov An225.
The An225 has a 290-foot wingspan, which would be more than 200 feet shorter than the Pelican's preliminary wingspan design of 500 feet. It is 275 feet long, compared to the Pelican's projected length of more than 300 feet. And its cargo-hauling capacity, 275.5 tons, would be only a fraction of the Pelican's as-designed 1,400-ton payload.
The Daily Telegraph has an artist's rendering here.
The Pelican will be designed to fly 50 feet above the ocean, using the buoyant aerodynamic effect of flying close to the water to provide its maximum economic range.
The BBC says Boeing hasn't yet committed to building it.
Here's the best article on the prospects for the Pelican.
Update: Some additional clarification from the Pelican Program Manager.
Other than cruising at low altitude above water, the Pelican has little in common with historical Russian wing-in-ground-effect (WIG) aircraft. The Russian WIGs were designed primarily for short range, sea-based military missions. With beefy structure and ample propulsion systems for water operations, they were no more efficient than modern subsonic transports, despite their lower speed.
The advent of computer-based flight controls permits the Pelican to be land-based, so that it can be much lighter and aerodynamically cleaner than earlier WIGs. It appears, remarkably, that land-based WIGs differ little from aircraft optimized for conventional cruising altitudes. This permits a dual-mode aircraft to provide substantial operational benefits in the long-range transport of cargo.
Advanced flight control systems also provide ample maneuverability while automatically maintaining safe clearance from the water.
� Blaine K. Rawdon, Pelican Program Manager, San Pedro, Calif.
Pelican would fly on a cushion of air.
Riding on top of a cushion of air, the Pelican would experience 70 percent less drag than a normal plane, allowing it to travel further while using the same amount of fuel. The wing-in-ground effect occurs at an altitude equivalent to 10 percent to 25 percent of the wing�s width at the point where it joins the fuselage. The phenomenon increases the ratio of lift to drag for a wing.
"It�s an effect that provides extraordinary range and efficiency," says John Skorupa, senior manager of strategic development for Boeing Advanced Airlift and Tankers. "With a payload of 1.5 million pounds, the Pelican could fly 10,000 nautical miles over water and 6,500 nautical miles over land.