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Flight Tests Begin For Genx-2b Engine Variant

机译：Genx-2b引擎变体开始飞行测试

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Now that flight-testing of its GEnx-1B is complete, GE Aviation has moved onward to evaluate another variant, the GEnx-2B, on its flying testbed starting in mid-February. The -IB powers Boeing's 787 Dreamliner, while the -2B runs on the B747-8. The GEnx-2B's flight test program is scheduled to run through October and log about 30 flights and 200 hours flying time. Installation and testing of the two GEnx variants differ, according to John Hardell, FTB/repair station manager at GE's flying testbed base in Southern California Logistics Airport (SCLA). The -IB has two Hamilton Sundstrand variable-frequency, 250-kW starter generators to start the engine and power the hydraulic, electrical and air-condition/ pressurization systems, while the -2B variant conventionally performs such functions by pulling bleed air.rn"Everything worked as planned," Hardell says, regarding the GEnx-IB test program. "We have all the data needed for the engines certification," which is expected this summer. The GEnx-2B will follow a test routine comparable to the -IBs. In addition to flights out of SCLA, near Edwards AFB, there will be high-altitude flying at Colorado Springs, Colo., flights under icing conditions in Seattle, Wash., and sea-level/hot-temperature flying in Yuma, Ariz. Prior to firstrnflight, a new engine pylon had to be installed on the inward, number-two position of the portside wing on GE's flying testbed, a heavily modified, 40-year-old B747-100 once owned by Pan Am World Airways. The wing has been beefed up to safely bear engines with up to 122,000 pounds of thrust. (Standard engines on the 747-100 produce a mere 47,000 pounds of thrust.) The flying testbed also has a small-engine position between the 747's fuselage and the number-two pylon.
机译：现在，GEnx-1B的飞行测试已经完成，GE Aviation已开始从2月中旬开始在其飞行测试台上评估另一种型号GEnx-2B。 -IB为波音787梦想飞机提供动力，而-2B在B747-8上运行。 GEnx-2B的飞行测试计划定于10月运行，并记录约30个飞行和200小时的飞行时间。 GE在南加州物流机场（SCLA）的飞行测试基地的FTB /维修站经理John Hardell表示，这两种GEnx变体的安装和测试有所不同。 -IB具有两个汉密尔顿·松斯特兰德（Hamilton Sundstrand）可变频率，250 kW起动机发电机，用于起动发动机并为液压，电气和空调/增压系统提供动力，而-2B变型通常通过抽吸放气来实现这种功能。一切都按计划进行。”关于GEnx-IB测试计划，哈德尔说。 “我们拥有发动机认证所需的所有数据”，预计今年夏天。 GEnx-2B将遵循与-IB相当的测试程序。除了从爱德华兹空军基地附近的SCLA起飞的航班外，还将在科罗拉多州的科罗拉多斯普林斯进行高空飞行，在结冰条件下在华盛顿州的西雅图飞行，并在亚利桑那州的尤马进行海平面/高温飞行。在首次飞行之前，必须在通用电气的飞行试验台上的舷侧机翼的向内第二位置安装新的发动机吊架，这是一架经过重大改装的40岁的B747-100，曾经由泛美航空拥有。机翼已经加强，可以安全承受122,000磅的推力。 （747-100上的标准发动机仅产生47,000磅的推力。）飞行测试台在747机身和2号塔架之间还具有较小的发动机位置。

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