The impulse manifold was a vital part of a starship's impulse drive system.

During its third week of observing Humanity in 1957, a Vulcan survey ship experienced a malfunction in its impulse manifold, necessitating an emergency landing on Earth. (ENT: "Carbon Creek")

The impulse manifolds on Enterprise NX-01 required checking every two hours to ensure they would not clog. Should they get clogged, it would cause the impulse engines to overload. (ENT: "Doctor's Orders")

On February 12, 2152, Trip Tucker claimed the impulse manifolds aboard the Enterprise required purging as an excuse for why he couldn't go with Captain Archer to visit the Torothan planet. In actuality, Tucker did not wish to go because he did not want to spend time in a desert. Archer ultimately convinced them to go, but Archer himself would use the required manifold purging as an excuse to return to Enterprise after learning Zobral and his men were considered terrorists. (ENT: "Desert Crossing")

Later that year, Trip Tucker detached a section of hull plating from Enterprise that a Romulan mine had clamped on to. Tucker noted that detaching this section of the hull would expose a good portion of the impulse manifold. (ENT: "Minefield")

In August of 2152, Tucker was about to purge the impulse manifolds when Archer asked him to fix the captain's chair. (ENT: "Singularity")

Xindi-Insectoid vessels have narrow impulse manifolds with minimal deflector shielding. In 2154, Enterprise was able to destroy a Xindi-Insectoid scout ship with one photonic torpedo strike to its impulse manifold. (ENT: "Hatchery")

Later that year, Enterprise was able to pass through a subspace corridor after reconfiguring their impulse manifolds to prevent the corridor from destabilizing, as it had done for the crew of an Enterprise from an alternate timeline. (ENT: "")

In 2375, Seven of Nine attempted to shut down USS Voyager's impulse engines by tapping into the impulse manifold from main engineering to prevent the ship from entering a wormhole. (VOY: "Bliss")

That same year, readying the USS Defiant for departure, Nog noted that the impulse manifold was purged and clear. (DS9: "The Changing Face of Evil")

Also in 2375, when the USS Enterprise-E was traveling through the Briar Patch, William T. Riker ordered full impulse. Geordi La Forge replied that the manifold couldn't handle full impulse in the Patch. (Star Trek: Insurrection)

In an ultimately unused line of dialogue from the first draft script of "Shadows of P'Jem" (written while the episode had the working title "Untitled Andorians Return"), Captain Archer agreed to allow Trip Tucker to participate in an away mission to Coridan on the condition that he ensured "those impulse manifolds" were aligned by the time Enterprise entered orbit of the planet. Eager to go on the away mission, Tucker replied, "Consider it done."
In the novelization of "What You Leave Behind", Breen warships are determined to have weak spots at their impulse manifolds.

See also Edit

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