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FireDirector http://thirteenyearsoffire.com/ThirteenYearsOfFireWiki/index.php?title=Acceleration_curve&diff=6403&oldid=prev 2018-12-26T22:48:26Z

<p></p> <p><b>New page</b></p><div>The acceleration curve is a linear graph measuring how quickly a space craft accelerates, which in turn is used to rate maximum [[sublight speeds]].<br /> <br /> The practically ubiquitous [[Ion vacuum drive]] has a maximum exhaust velocity of around seventy-percent of the speed of light (PSL). Thus, every ship using this engine has a theoretical maximum speed of 70PSL. However, the length of time it takes a ship, as well as the distance traveled, to reach that velocity, may make it impractical to cruise at that speed. <br /> <br /> Many factors effect the acceleration curve: the engine itself(and it&#039;s specific impulse and exhaust velocity), the weight of the ship, it&#039;s role, and safety margins. Keeping in mind that a spacecraft has exert signficant force both when accelerating, decelerating, and turning, all of which factors in to the curve. <br /> <br /> According to the engine&#039;s specific impulse, it may or may not have enough delta-V to reach 70PSL within an allotted time-frame. The acceleration curve is used to calculate the various speed ratings. The exact velocity differs greatly from ship-to-ship, and changes as well according to role. A carrier is, for example, expected to have a very different acceleration curve than a fighter.<br /> <br /> ==Ratings==<br /> The Acceleration Curve sets the ship&#039;s maximum recommend speed rating. There are two types of ratings: a hard maximum and an experience maximum. A ship rated at &quot;40PSL&quot; should never attempt to travel faster than forty percent of the speed of light. A ship with a rating of &quot;40PSL+&quot; is rated to travel at faster speeds according to the pilot or captain&#039;s discretion. Typically, only millitary spacecraft are given a &quot;+&quot; rating, though some civilian vessels(such as rescue ships) will occasionally receive it.<br /> <br /> ==Calculating an Acceleration Curve==<br /> [[Category:Course Books]]</div>

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