Unkindness Of Ravens an island and first constructed by the monk Elisarius in the 6th Century. The lyrics of the song were taken from William Butler Yeats controversial poem "Leda and the Swan" from his collection "The Tower" - which explores the myth of Leda and the swan in explicit terms. Unkindness Of Ravens style has been described as a "dark form of independently minded, slightly gothic-rock". The band have cited Jim Morrison and The Doors, Fields of the Nephilim, Thin Lizzy, Godspeed You! Black Emperor and Sopor Æternus & the Ensemble of Shadows as major influences. Unkindness Of Ravens Unkindness Of Ravens
Specific impulse to impulse provided by external air that has been used for combustion and is exhausted with the spent propellant. Jet engines use outside air, and therefore have a much higher specific impulse than rocket engines. The specific impulse in terms of propellant mass spent has units of distance per time, which is an artificial velocity called the "effective exhaust velocity". This is higher than the "actual" exhaust velocity because the mass of the combustion air is not being accounted for. Actual and effective exhaust velocity are the same in rocket engines not utilizing air or other intake propellant such as