Douglas A-4M - MAXIMUM RANGE CRUISE

Section XI
Part 4
~ Ie)
! ID)
Drag index 100
Mach number . . . . . . . . . • . . . . .. 0.655
!
I
(E) EPn. . .... , . , .
. . 2. 35
SA MPLE LO NG RANG E CRU I SE -
MACH N
UMBER A ND EPR
I Lo ng R ang e C,u;, e- Na u tkal M; le, p" Pound
of Fuel
(For fi b'Ure 11 -26)
(F ) Aver age g ross weight
18,000 lb
(G) Pr ess ure altitude .. ......... " 25,000 ft
(Ii) Temp er a ture deviation frum TeAO
standard (Ambient t empera-
ture ". -2 4. SOC) . . . . . . .. dO °C
( J) Drag index
100
(K) Pre ss ure altitude ..... _ , . , . . , . 25,000 ft
(L) Ambient temperature. . . . . . . . .. -2 4. SoC
~ (M) Nautical miles per pound of fuel ... 0.150
11-46
SAMPLE LONG RANGE CRUISE-
NAUTICAL MILES PER POUND OF FUEL
MAXIMUM RANGE CRUISE
Maximum Range Cruise c hart s . shown in figures
11 -27, 11-2 8, and 11 -29, pres ent the nec essar y
m i ssion planning data to set up maximum ran ge
cruise sc hed u les f or a constant c ru ise altitude. To I
usc the maximum ran ge cha r ts, the ave r age gross
weig ht, cr ui se alti tude, drag iudex, ambient air
temperature. relative wind. and gl'ound distance to
be covered must be known. It is then possible to
determine true Ma ch number. true airsp eed. time
enr o ute, nautical miles per pound of fuel. fuel (J ow,
an d total fuel required. Optim um c rui se alti tu de
(altitude for best ran ge) lines a re superimposed on
the pressure aliitude plot.
SAMPLE PROBLEM
Maximum Ra n ge Cruise- Time and Sp ee d
( For figul'c 11-27)
IA) Averagc g ross weight (O r
c ruise le g . .. ........ .
18,0001b
I