38
edits
Improving Glider Realism: Difference between revisions
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→Variometer: error in TE adjustment formula
m (→Ridgelift) |
(→Variometer: error in TE adjustment formula) |
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** if in time period 't' the glider goes from height 'h1'..'h2' and speed 'v1'..'v2': | ** if in time period 't' the glider goes from height 'h1'..'h2' and speed 'v1'..'v2': | ||
** uncompensated vario reading = (h2-h1)/t | ** uncompensated vario reading = (h2-h1)/t | ||
** TE adjustment = height the glider would have gained if it hadn't accelerated | ** TE adjustment = height the glider would have gained if it hadn't accelerated / time | ||
** = (change in kinetic energy / (mass x G)) | ** = (change in kinetic energy / (mass x G))/t | ||
** = (0.5 * mass * v2^2 - 0.5 * mass * v1^2) / (mass x G) | ** = ((0.5 * mass * v2^2 - 0.5 * mass * v1^2) / (mass x G)) / t | ||
** = (v2^2 - v1^2) / | ** = (v2^2 - v1^2) / 2Gt where G = 9.81 meters per second per second | ||
** TE reading = uncompensated reading + TE adjustment | ** TE reading = uncompensated reading + TE adjustment | ||
** '''TE reading = (h2-h1)/t + (v2^2 - v1^2) / 19.62''' | ** '''TE reading = (h2-h1)/t + (v2^2 - v1^2) / (19.62*t)''' | ||
** (all units meters, seconds, meters per second) | ** (all units meters, seconds, meters per second) | ||