Flight tests of the U.S. Navy's new electromagnetic aircraft launch system (EMALS) resumed in late May after a five-month hiatus, and two more aircraft types have now passed their initial launch tests.
The program's maiden launches were accomplished in mid-December when an F/A-18E Super Hornet strike fighter from Air Test and Evaluation Squadron 23 (VX-23) made four takeoffs from the Navy's catapult test center at Lakehurst, N.J. But the tests revealed the need to fine-tune the software that controls the system's motors and better control the miniscule timing gaps between when the motors are energized and turned off.
"The linear motors fire sequentially as you go down the catapult track," said Capt. James Donnelly, the Navy's program manager for EMALS. "Only three are energized at a time. They turn on, turn off. As each one energizes, a force is exerted on the aircraft, and the timing needed to be fine-tuned."
Flight tests with the F/A-18E resumed May 25, and "the launches validated the software changes," Donnelly said.
The Super Hornet made 14 launches using the revamped software, followed by 12 launches on June 1 and 2 with a T-45C Goshawk training jet from VX-23.
A C-2A Carrier Onboard Delivery aircraft from VX-20 made a further series of 12 launches on June 8 and 9.
The Super Hornet will return in July to Lakehurst for another series of launches using a variety of stores, or weapons, mounted under the wings and on the aircraft. Later in the summer, an E-2D Advanced Hawkeye airborne command-and-control aircraft will begin launch tests, Donnelly said.
The multiple launches are used to test a variety of weights on the aircraft, he said, and to validate the EMALS system and improve reliability. The aircraft are also tested at various launch speeds.
Reliability of the EMALS system is "improving," Donnelly said.
"We have more and more launches without any [warning] lights that come on, anything we annotate in launch logs," he said during a June 23 interview.
"A lot of corrections" were made during the early stages of the program's flight testing, Donnelly said.
"We're doing much less of that. We had very few issues in the May and June launches."
The EMALS, under development by prime contractor General Atomics and the Navy, is intended for installation on board the new Gerald R. Ford CVN 78-class aircraft carriers, where they will replace traditional steam catapults. The launch tests are done at Lakehurst using a mixed Navy-General Atomics team.
Despite the five-month pause in the test schedule, production and delivery of EMALS components is proceeding for the Gerald R. Ford, under construction at Huntington Ingalls Industries' Newport News, Va., shipyard.
"No impact to the ship [construction] schedule," Donnelly said. "We're meeting our required in-yard dates. We started deliveries in May, and we're delivering a lot of equipment this month, including most of the motor generators - the components that many folks were most concerned about schedule-wise."
Asked about the program's budget performance, Donnelly noted that production elements are being procured under a fixed-price contract - "no ups and extras there," he said - but he declined to provide test budget figures.
"We're constantly looking at the testing budget, so that's under discussion," he said.
"The bottom line is, we'll continue testing," he said. "Our focus is to ensure the catapult is as reliable as possible as when we deliver and the ship gets underway with sailors aboard."
Sailors at Lakehurst Naval Air Station, New Jersey, watch as a T-45C Goshawk of VX-23 rolls down the rail during testing of the EMALS Electromagnetic Aircraft Launch System in early June. The aircraft made a dozen launches over two days.
"The linear motors fire sequentially as you go down the catapult track," said Capt. James Donnelly, the Navy's program manager for EMALS. "Only three are energized at a time. They turn on, turn off. As each one energizes, a force is exerted on the aircraft, and the timing needed to be fine-tuned."
Flight tests with the F/A-18E resumed May 25, and "the launches validated the software changes," Donnelly said.
The Super Hornet made 14 launches using the revamped software, followed by 12 launches on June 1 and 2 with a T-45C Goshawk training jet from VX-23.
A C-2A Carrier Onboard Delivery aircraft from VX-20 made a further series of 12 launches on June 8 and 9.
The Super Hornet will return in July to Lakehurst for another series of launches using a variety of stores, or weapons, mounted under the wings and on the aircraft. Later in the summer, an E-2D Advanced Hawkeye airborne command-and-control aircraft will begin launch tests, Donnelly said.
The multiple launches are used to test a variety of weights on the aircraft, he said, and to validate the EMALS system and improve reliability. The aircraft are also tested at various launch speeds.
Reliability of the EMALS system is "improving," Donnelly said.
"We have more and more launches without any [warning] lights that come on, anything we annotate in launch logs," he said during a June 23 interview.
"A lot of corrections" were made during the early stages of the program's flight testing, Donnelly said.
"We're doing much less of that. We had very few issues in the May and June launches."
The EMALS, under development by prime contractor General Atomics and the Navy, is intended for installation on board the new Gerald R. Ford CVN 78-class aircraft carriers, where they will replace traditional steam catapults. The launch tests are done at Lakehurst using a mixed Navy-General Atomics team.
Despite the five-month pause in the test schedule, production and delivery of EMALS components is proceeding for the Gerald R. Ford, under construction at Huntington Ingalls Industries' Newport News, Va., shipyard.
"No impact to the ship [construction] schedule," Donnelly said. "We're meeting our required in-yard dates. We started deliveries in May, and we're delivering a lot of equipment this month, including most of the motor generators - the components that many folks were most concerned about schedule-wise."
Asked about the program's budget performance, Donnelly noted that production elements are being procured under a fixed-price contract - "no ups and extras there," he said - but he declined to provide test budget figures.
"We're constantly looking at the testing budget, so that's under discussion," he said.
"The bottom line is, we'll continue testing," he said. "Our focus is to ensure the catapult is as reliable as possible as when we deliver and the ship gets underway with sailors aboard."
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