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The DELTA Pro 3 and DELTA Pro Ultra offer higher capacities, [16] [18] with app-based monitoring and control for home backup power, [18] and are expandable for increased energy needs. [18] [16] The DELTA Pro 3 is the first of EcoFlow's units to include the company's X-Core 3.0, an integrated architecture system. [18]
Engine Origin Designer Vehicle Status Use Propellant Power cycle Specific impulse (s) [a] Thrust (N) [a] Chamber pressure (bar) Mass (kg) Thrust: weight ratio [b] Oxidiser: fuel ratio
Delta III's payload fairing was a new composite design, matching the upper stage hydrogen tank's 4 m (13 ft) diameter and allowing larger payloads than the Delta II's 9.5 or 10-foot-diameter fairing. Delta III's 4-meter fairing was derived from Delta II's 10 ft composite fairing. [2]
The second stage of Delta II was the Delta-K, powered by a restartable (up to six restarts) Aerojet AJ10-118K engine burning hypergolic Aerozine-50 and N 2 O 4. These propellants are highly toxic and corrosive, and once loaded the launch had to occur within approximately 37 days or the stage would have to be refurbished or replaced. [ 29 ]
The Delta 1000 series was nicknamed the Straight-Eight and combined an Extended Long Tank first stage with an 8 ft-diameter (2.4 m) payload fairing, up to nine Castor 2 SRBs, and the new McDonnell Douglas Delta P second stage using the TRW TR-201 engine. Payload capacity increased to 1,835 kg (4,045 lb) to LEO or 635 kg (1,400 lb) to GTO.
Delta II A Delta II launch vehicle launches from Cape Canaveral carrying the Dawn spacecraft. Function Launch vehicle Manufacturer United Launch Alliance Country of origin United States Cost per launch US$51 million in 1987 (7920-10 model) US$137 million in 2018 before retirement Size Height 38.9 m (128 ft) Diameter 2.44 m (8 ft 0 in) Mass 152,000–286,000 kg (335,000–631,000 lb) Stages 2 ...
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