Spaceflight Now Home

The Mission

Rocket: Ariane 5 ECA
Payload: Yahsat 1A & Intelsat New Dawn
Date: April 22, 2011
Time: 2137 GMT (5:37 p.m. EDT)
Site: ELA-3, Kourou, French Guiana

Anomaly identified

Launch abort story

Preview story

Our Ariane archive

Ariane abort produces fire and smoke, but no blastoff

Posted: March 30, 2011

Bookmark and Share

With its hydrogen-fueled Vulcain main engine already spewing flame, an Ariane 5 rocket was dramatically grounded Wednesday by a last-second abort moments before two mighty solid rocket boosters were to have ignited to send the 1.7-million-pound launcher toward space.

Watch the tense aborted countdown of Tuesday's Ariane 5 rocket launch. Credit: Arianespace
The 16-story rocket was due to lift off at 2145 GMT (5:45 p.m. EDT), but a final computer check of the Ariane 5's health uncovered a problem that triggered the cutoff of the countdown, according to Jean-Yves Le Gall, Arianespace's chairman and CEO.

Like the space shuttle, the Ariane 5 rocket's core cryogenic main engine ignites seconds before twin solid-fueled boosters, giving computers a chance to gauge the vehicle's health before firing the strap-on motors, which can't be turned off.

Speaking to VIPs gathered inside the Jupiter control room at the Guiana Space Center, Le Gall said engineers and technicians were evaluating the problem a few minutes after the abort was ordered.

"The synchronized sequence went to the end and the cryogenic engine started as planned, but as you know, for seven seconds, the launcher carries out tests and if the tests are not conclusive, the solid boosters do not go ahead," Le Gall said through a translator. "These tests were not conclusive and, therefore, we have an aborted launch. The cryogenic engine has switched off."

The launch team began safing the rocket after the hair-raising abort, and Arianespace said in a statement both of the launcher's communications satellite payloads were secure.

The rocket's nose cone contains the Yahsat 1A spacecraft for Al Yah Satellite Communications Co. of Abu Dhabi and the Intelsat New Dawn payload, a wireless broadband Internet and broadcasting platform financed by South African investment firms.

The Vulcain 2 engine shut down a few seconds after the abort. Credit: Arianespace
It was a rare hiccup for the Ariane 5 rocket, the global leader in launching commercial communications satellites for television broadcasting, Internet services and other applications.

Le Gall said the launch would be delayed at least several days to allow engineers to study and correct whatever problem caused Wednesday's scrub.

"We now have to test and see what actually took place, and why this launch abort took place, and lift off as soon as possible," Le Gall said. "We have to bring the launcher back to the BAF (final assembly building), and therefore this will be delayed, obviously."

The Ariane 5 rocket's ELA-3 launch pad is located 2.8 kilometers, or about 1.7 miles, from the final assembly building. The workhorse launcher rolls between facilities atop a mobile table on rail tracks.

"I'm very sorry about this, but as you know, we do not take any risks and therefore it is very important for us to check this," Le Gall said. "I will give you some further information on why and what the causes for this were (later)."

It was the first Ariane rocket abort after engine ignition since the first flight of the Ariane 1 booster in December 1979, according to Mario de Lepine, a company spokesperson.

Final Shuttle Mission Patch

Free shipping to U.S. addresses!

The crew emblem for the final space shuttle mission is now available in our store. Get this piece of history!

STS-134 Patch

Free shipping to U.S. addresses!

The final planned flight of space shuttle Endeavour is symbolized in the official embroidered crew patch for STS-134. Available in our store!

Ares 1-X Patch
The official embroidered patch for the Ares 1-X rocket test flight, is available for purchase.

Apollo Collage
This beautiful one piece set features the Apollo program emblem surrounded by the individual mission logos.

Project Orion
The Orion crew exploration vehicle is NASA's first new human spacecraft developed since the space shuttle a quarter-century earlier. The capsule is one of the key elements of returning astronauts to the Moon.

Fallen Heroes Patch Collection
The official patches from Apollo 1, the shuttle Challenger and Columbia crews are available in the store.



© 2014 Spaceflight Now Inc.