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top speed

Last post 10-12-2016, 8:16 AM by Tadik. 22 replies.
Page 2 of 2 (23 items)   < Previous 1 2
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  •  04-16-2003, 5:08 AM 2265 in reply to 1585

    Re: Re:top speed

    where did you get: Vsound in air = 331.4 + 0.6 Tc m/s?

    The way i've learned the sound of minor pressure disturbances (so.. e.g. sound) is by this formula:

    a = sqroot(yRT), where R = 287.05, T = temperature, and y (lamda) = 1.4

    then you calculate the mach number by dividing the actual airspeed by this 'speed of sound':

    M = V/a

    So as you say, 'Vsound in air' is only a function of temperature, but i'm not sure whether 331.4 + 0.6Tc is correct.. it might be approximately correct but i'd advise to use the top formula.

    Martijn Otten



    website: http://www.aerospacepictures.com

  •  05-10-2003, 11:54 AM 2275 in reply to 2265

    Re: Re:top speed

    correction.. y = gamma :-)

    Martijn
  •  03-12-2006, 3:57 AM 3264 in reply to 1578

    Re: top speed

    who cares the F1-11 can do mach3
  •  03-27-2007, 1:52 AM 4145 in reply to 1581

    Re: Re:top speed

    The f-14D tomcat top speed about mach 2.4
  •  03-29-2007, 10:11 AM 4154 in reply to 2265

    Re: Re:top speed

    You are correct that it is an approximation, but a fairly close one.

    Your formula is more correct. Notice however that you have to enter Absoulute Temperature, so 273.15 + Degree C.

  •  02-20-2012, 10:28 PM 11209 in reply to 1702

    Re: Re:tiger

    anonymous2:
    *** Posted by run *** [ who are you?] I am Run Why ?


    i don't understand the question.
  •  09-10-2015, 8:45 AM 14025 in reply to 11209

    Re: Re:tiger

    Nice post and nice informations.
  •  10-12-2016, 8:16 AM 14928 in reply to 2265

    Re: Re:top speed

    Super! i was looking for this info. Thx
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