Douglas A-4M - REFUSAL SPEED

Section XI
Part 2
NAVAIR 01-40AVM-l
(A) Takeoff weight ..
. . . . . . . . .
(9) Takeoff airspeed . . . . . . . . . .
(e) Ambient runway
ai r temperature ...........
(D) Runway pressure
alt itude
...
(E)
Headwind
(F) Runway gradie nt
(G) JA TO firing distance ..
JATO Takeo" Distan ce
(For figure 11-11)
(H) Takeoff weight ........ .
(J) Takeoff airspeed ........ .
(K) Ambient runway air
temperature ...... .
(L) Runway pr essure
altitude ........ .
(M) Headwind ..
(N) Runway g radient
(P) Ground run distan ce.
(Q) To t. a I distance to clear
50 -foot obstacle .. .
Note
20.000 lb
146 KlA S
30"C
2000
ft
10 kn
-2 per
cent
450 ft
20,000 Ib
146 KlAS
2000 ft
10 kn
-2
percent
1 350 ft
2500 ft
Jettisoning of JA TO bottles should be per-
formed in 1. 0 g \eve\ flight. in cr uise con-
figuration. at or below 400 KIAS (maximum).
REFUSAL SPEED
The maximum refusal speed is that speed at which
engine
failure pernlits stop ping the aircraf t on a run-
S way of specified length. F igures 11- 12 and 11 - 14
'.1 present this data for engine failure during a milita r y
thrus t takeoff without JATO burning. Data inclu d es
distance covered during a pilo t reac tion tim e of 2
seconds and for an B-second engine deceleration time
I
from mili t ary to Id le rpm . Fi gur e 11 -12 is without
drag chute deployed and fi gu re 11 - 14 is with dr ag
chute deployed.
11-20
SAMPLE JATO TAKEOFF DISTANCE
rAl·142
SAMPLE PROBLEM
Takeoff Refusal Speeds
(F or figure 11 - 12 )
Cotu
lguratlon: All configurations
(A) Runway temperature. . . . . . . 30
Q
C
(B) Runway pressu r e altitude 2000 ft
(el Transfer scale ...... . 1. 12
(D) Field length ......... .
8000
ft
(E) Takeoff weight .. 20.000 lb
(F) H ea dw ind 10 kn
(G) Runway gradient -2 percent
(H) Takeoff refusal speed ..
91 KlAS
STOPPING DISTANCE
The sto pping dis t ance c harts (figures 1l-13 and 11-1 5) ~
ar e included primarily f or use if the takeoff should be ..