Douglas A-4M - Page 39

68 pages

Save Page as PDF

To Next Page

To Next Page

To Previous Page

To Previous Page

Loading...

NAVAlB

OJ-40

AVM

-l

Section

XI

Part

4

Maximum

Range

Cruise- Fuel

I

1:

:1

(For

f

igur

e

11.29)

~autieal

miles

per

pound

of

fuel

..

...

.

Maximum

ran

ge

true

airspeed

i (WI

Fuel

flow

~

(X)

Time

. .

(Y)

Total

fuel

required

0.152

NMI/

lb

380

KTAS

2500

Ib/hr

28.0

min

1170

Ib

S

AMPLE

MAXIMUM

RANGE

CRUI

SE

- FUEl

I

i

f"A

l·1

56

NAUTICAL

MILES

PER

PO

UN

D

OF

FUEL

Nautical

Miles

per

Pound

of

Fuel

cha

l"ls

(figure

11-30.

sheets

1

through

6)

present

cruise

data

i

throughout

the

gross

weight.

airspeed,

and

drag

index

range

of

the

aircraft

. Thesi.'

data

are

pre-

sented

for

use

when

cruise

data

are

required

for

A

speed

condilions

other

than

maximum

rang~

or

long

W

range

cruise

. To

usc

the

Nauticall\Iiles

PCI'

Pound

of

Fue

l

charts,

the

average

gross

weight,

pressure

altitude,

cruise

Ma

ch

number,

drag

index,

and

ambient

air

lemperalu

re

must

be

known.

It

is

then

possible

to

detcl'Il

line

true

airspeed,

nautical

miles

per

pound

of

fuel,

fuel

flow.

and

engine

pressure

r

atio.

It

is

recommended

ihat

engine

pressure

ratio

be

used

as

the

prima

l'}"

measurement

of

engine

thrusi

output

rather

than

fuel flow

when

setting

up

cruise

schedules

.

SAMPLE

PROBLEM

Naut

ica

l M il

es

per Pound of Fuel

(F

or

figure

11

·30,

sheet

1)

(A)

Average

gross

weight.

(B)

Cruise

pressure

altitude

(C) Drag:

index

= 0

(baseline)

(0)

Cruise

Ma

ch

number

(E)

Thrust

required

/&

amb

-

clean

aircraft

. . . .

SA

MP

LE

NAUTICA

L

MILES

PER

POUND

OF

FUEl

MAXI'.WM RANG!

MilCH

NUMBER

,1,1

DRAC

I~D

n

,

14.000

Lb

30.000

ft

0.75

ti225

!

I

I'A

l·159

W

11·51

I