Aces High Bulletin Board

General Forums => Aircraft and Vehicles => Topic started by: meddog on February 25, 2003, 07:36:05 AM

Title: Mach 1 conversion for hazed
Post by: meddog on February 25, 2003, 07:36:05 AM

Hazed here are the mach 1 conversions from sea level to 30k.  Mach numbers are represented in a precentage of 1.0 mach. ex: if mach 1 at sea level is 761.5 mph. and you want to know what .78 mach would be(which means 78% of mach 1) just multiply 761.5 x .78 =593.97 mph. Airspeeds are true airspeeds and not indicated.  Just FYI the formula is as follows:

Mach = TAS/CS
CS= 38.967854*sqrt(T+273.15)
T= temp in degrees celsius
TAS= true airspeed in knots
knots-to-MPH=kts*1.15
Standard Temperature is 15 deg c at sealevel reduced 2 deg c per 1000 feet.

ALT     TEMP     MACH 1  
SL        15         761.5
01        13         758.8
02        11         756.2    
03        09         753.5
04        07         750.9    
05        05         749.2    
06        03         745.5
07        01         742.8
08       -01         740.1    
09       -03         737.3    
10       -05         734.6    
11       -07         731.8    
12       -09         729.1    
13       -11         726.3    
14       -13         723.6    
15       -15         720.8
16       -17         718.0
17       -19         715.2
18       -21         712.4
19       -23         709.5
20       -25         706.7
21       -27         703.8
22       -29         701.0
23       -31         698.1
24       -33         695.2
25       -35         692.3
26       -37         689.4
27       -39         686.5
28       -41         683.5
29       -43         680.6
30       -45         677.6
:D

Title: hmm...
Post by: Golfer on February 25, 2003, 11:42:53 AM

Meddog...i don't see that calculation on my whiz wheel...you learn all kinds of nifty neato things being CFI don't you :D