montmein69 Mar 24 Avr 2018, 20:09
Un article intéressant de SpaceFlightnow.
https://spaceflightnow.com/2018/04/20/orbital-atk-names-new-launcher-selects-upper-stage-engine/
Question performances .... elles sont plus qu'honorables (pour les deux versions dites "intermediate" pour la moins puissante et "heavy" pour leur haut de gamme) et les allergiques à la poudre vont devoir en rabattre un peu.
According to an Orbital ATK fact sheet, the intermediate version of OmegA will lift between 10,800 pounds (4,900 kilograms) and around 22,300 pounds (10,100 kilograms) into a geostationary transfer orbit, an elliptical loop around Earth commonly by communications satellites transiting to geostationary orbit more than 22,000 miles (nearly 36,000 kilometers) over the equator.
That performance range is comparable to the lift capacity of ULA’s Atlas 5 rocket family.
The heavy OmegA configuration can loft between roughly 11,600 pounds (5,250 kilograms) and 17,200 pounds (7,800 kilograms) of payload directly into geostationary orbit — eliminating the need for a spacecraft to use its own fuel for major orbital maneuvers.
Bien entendu, Orbital-ATK compte prendre sa part du gâteau des vols pour le compte de l'USAF.
“Orbital ATK is very excited to partner with the U.S. Air Force to develop OmegA, our new EELV-class launch vehicle,” said Scott Lehr, president of Orbital ATK’s flight systems group, in a statement. “Our OmegA rocket provides the best combination of performance, affordability and reliability to support the full range of our customers’ mission requirements.”
montmein69
