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 Rate Of Acceleration To Vr Speed?
 Wardialer From United States of America, joined Sep 2001, 1192 posts, RR: 0Posted Fri Nov 16 2001 05:07:32 UTC (13 years 4 months 2 weeks 5 days 8 hours ago) and read 2627 times:

 What is the rate of acceleration to rotation speed of an B747-400 or an A319.Rate of acceleration being in = Knots per second (Ground Speed) on a standard dayOAT =15CBARO (QNH)= 1013MBWind= 0
 Skystar From Australia, joined Jan 2000, 1363 posts, RR: 2 Reply 1, posted Fri Nov 16 2001 12:56:26 UTC (13 years 4 months 2 weeks 5 days ago) and read 2606 times:

 These are some rough whole numbers (just using some scenarios in my head). A319 - 4 to 7kt/sec B744 - 3 to 5kt/sec Basically, if you want to work it out, just divide Vr by the takeoff time. Eg, rough figure for 744 at MTOW, 170/50=3.4kt/sec A340 (269ton at ISA+12): 160/55=2.91kt/sec There are so many factors which can affect this, because of weight and thrust derates involved. Some may be able to help you with the physics of it, but they tend to ignore other drag factors (generally consider only thrust & weight). Cheers, Justin
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