TM 1-1510-218-10 3-60 2.   The  range  (RANGE),  which  is  the distance    in    nautical    miles    that could    be    flown    based    on    the endurance   calculated   above   and the present groundspeed. 3.   The   fuel   efficiency,   which   is   the groundspeed divided by the present fuel flow. 4.   The   desired   fuel   reserve   (RES).   Same  as  displayed  on  the  OTH  5 page.      Changing   the   reserve   on one of the two pages also changes it on the other page. (c)  OTH   7   Page.       The   OTH   7   page displays rate of fuel flow as depicted in Figure 3-77. OTH 7 FUEL FLOW      LBS/HR ENG 1   301 ENG 2   295 TOTAL   596 Figure 3-77.  OTH 7 Page (d)  OTH   8   Page.       The   OTH    8   page displays the amount of fuel used as depicted in Figure 3-78. OTH 8 FUEL USED         LBS ENG 1   308 ENG 2   301 TOTAL   609 Figure 3-78.  OTH 8 Page (6)   The  Air  Data  Pages.    When  interfaced with the AETM, the KLN 90B will display real time air data  parameters  such  as  True  Airspeed  (TAS),  Static Air  Temperature  (SAT),  Total  Air  Temperature  (TAT), Mach  number,  density  altitude,  and  pressure  altitude.   The KLN 90B will also calculate and display real time wing data (magnitude and direction).  The  OTH 9 and OTH 10 pages are used to display air data information.   Figure 3-79 depicts the OTH 9 page display. NOTE These  air  data  pages  receive  inputs  from air  data  sensors  and  display  real  time  air data information.  They are independent of the  calculator  pages  that  rely  on  manual pilot inputs to calculate air data information. OTH 9 AIR DATA TAS   265KT MACH    .41 HDWND  30KT WIND  078^ot        32KT Figure 3-79.  OTH 9 Page (a)  The  TAS  of  the  aircraft  through  the surrounding air mass. (b)  MACH  - the ratio of the true airspeed to the speed of sound at a particular flight condition. (c)  The Tailwind (TLWND) component of the wind, if applicable. (d)  The Headwind (HDWND) component of the wind, if applicable. (e)  The Wind (WIND) direction relative to true North and the wind speed. (f)   OTH  10  Page.    The  OTH  10  page displays the following information. 1.   SAT - the actual temperature of the surrounding air. 2.   TAT  - the air temperature including heat   rise   due   to   compressibility.   This  is  the  temperature  measured directly by the OAT probe.