Douglas A-4M - PART 5 ENDURANCE; MAXIMUM ENDURANCE

68 pages

Save Page as PDF

To Next Page

To Next Page

To Previous Page

To Previous Page

Loading...

NAV

AIR

01

-40AVM-l

Section

XI

Pa

rt 5

PART

5

ENDURANCE

FOULED

DECK

ENDURANCE

Occasions

aris

e

durin

g

carr

ier

operaiions

when

the

deck

becomes

fouled

and

aircralt

cannot

be

taken

aboard

until

the

deck

is

clea

re

d.

In

these

i

nstanc

es

,

it

is

desirable

for

the

pilots

and

the

air

officer

to

be

awa

re

of

the

endurance

c

apab

ilities

of

the

unre-

covered

aircraft

so

t

hat

an

immediate

de

ciSion

can

be

made

concerning

the

proper

cours

e of

action.

Should

the

est

i

mated

·'clear

deck·'

time

be

beyond the

endurance

time

of

the

aircralt,

then

it

must

either

depart

immediately

for

the

beach

,

or

land

aboard

the

ready

de

ck

of

another

car

rie

r.

if

available

.

However,

if

it

is

either

desirable

or

man

d

atory

that

th

e

aircraft

orbit

until

the

deck

is

clear,

it

is

necessa

r y

that

the

pilot

fully

understand

the

proper

procedure

to

obtain

the

maximum

endur

anc

e with

the

available

fuei.

The

Fouled

Deck

Endur

anc

e

chart

(figu

re

11-32)

tabulates

the

endurance

times

for

va

r

ious

q\lan

tit

ies

of fuel on boa

rd

at

both t

he

initial

altitude

and

the

opt

i

mum,

best

endurance

altitu

de .

The

airc

r

aft

configuration

consists

of

four

empty

wi

ng

pylons

plus

guns

with

a

total

dr

ag

index

of 33.

The

endurance

values

are

given in

minut

e

s;

for

the

op

timum

altitudes

include

the

time

required

for

a

military

thrust

climb

to

that

altitu

de

and a

maximum

range

desce

nt

to

sea

level

with 250

po

u

nds

of

fuel

remainin

g

for

app

ro

ach

and

landing

.

Th

e en

dura

nce

times

for

the

initial

altitude

lnclude only

the

desce

nt

time

since

no

climb

is

req\Jired.

Climb

s

peeds

and

a

irspeeds

fo

r

maximum

endurance

are

included

in

the

chart

together

with letdown

inst

ruc

tions

.

The

ti

me

at

which

letdown

should

be

initiated

is

g

iven

in t

er

ms

of fuel on

boa

rd

and r

epres

e

nts

the

!

fuel

required

to

conduct

a

maximum

r~Ul

ge

descent

from

altitu

de

to

sea le

veL

A 250-!Xlund fuel alJow-

.

ance

is

inclu

ded

for

approach

an

d

landing

.

Bingo

Enduranc

e

an

d

Bing

o

Endurance-Gear

Down

cha

rts

a

re

p

re

sented

in

fi

gu

re

s

11-33

and

11-34

respectivel

y.

These

char

ts

a

re

pr ovided

for

an

ai

r c

raft

configuration

consisting

of

four

wing

pylons,

guns,

and two

300-gallon

exter

nal

fuel

tanks

with

a

total

dr

ag

in

dex

of 61 w

ith

g

ear

up and 391

with

gear

down.

The

procedures

for

the

use

of

the

charts

are

identical

to

those

for

the

Fouled

Deck

Endurance

cha

rt:

however

. an BOO-pound

fue

l

allowance

is

included

fo r

approach

and

landin

g.

MAXIMUM ENDURANCE

The

!o.

l

aximum

Endurance

charts

provi

de

a

means

of

determinin

g

the

M

ach

numb

er

lU1

d

calibrated

air-

speed

for

maximum

endurance

with

the

associa

ted

fuel

flow

an

d fuel

required

f

or

a

specified

loiter

time.

Thes

e

data

ar

e

provided

for

a

constant

altitude

loiter

condit

ion.

Optimum

loiter

altitude

lines,

altitude

for

best

end

uranc

e

are

supe

r im!Xlsed on

the

pressure

altitude

plots

,

To

use

these

cha

rts.

the

avera

ge !

g

ross

wei

ght,

hank

angle

, p

re

ssure

altitude

,

drag

,

index

,

ambient

air

temperature.

and

loiter

time

must

be

knClWn.

The

charts

then

provide

Mach

num-

ber,

ca

libra

ted

ai

r

spee

d,

fuel

flow. and fuel

required

for

ma

ximum

endurance.

SAMPLE

PROBLEM

Ma

xi

mum

Endurance Sp

ee

d

(Fo

r figu

re

11-35)

(A)

Average

g

ross

w

ei

ght

15.000

Ib

(B) Bank

angie

. , . . . . . . . .

15

deg

r

ees

(C)

Loite

r

pressure

altitu

de

. . . .

25. 000

it

(0 )

Drag

index

. . .

100

(E)

Mac

h

numb

er

for

maximum

enduranc

e 0

,4

75

11

-63