k l I L - A - 887
Q
E? ( AS l
20 P l a y 1987
S
U
PE
R
SE
D
I
NG
W
w f i c i a l co
mm
en t s ( r e co
mm
enda t i ons , add i t i ons , de l e t i ons ) and any p e r t i nen t
da t a wh i ch
m
a y be o f us e i n I
m
p r ov i ng t h i s docu
m
en t shou l d b e a dd r e s s ed t o :
N
a v a l A i r Eng i ne e r i ng Ce n t e r , Sy s t e
m
s Eng i ne e r i ng and S t anda r d i z a t i on
D
epa r t
m
en t (Code 93 ) , L a k e hu r s t ,
N
J 08733 - 5100 , by us i ng t h e s e l f - add r e s s ed
S t anda r d i z a t i on
D
ocu
m
en t I
m
p r ov e
m
en t P r opo s a l (
DD
Fo r
m
1426 ) appe a r i ng a t t h e
end o f t h i s docu
m
en t o r by l e t t e r .
M I L - A - 8870 ( AS
G
)
18 Ma y 1960
M I L I TA
R
Y SPEC I F I CAT I
ON
A I
R
PLA
N
E ST
R
E
NG
T
H
A
ND R
I
G
I
D
I TY
V I B
R
AT I
ON
, FL
U
TTE
R
, A
ND D
I VE
RG
E
N
CE
Th i s sp e c i f i c a t i on I s app r ov ed f o r us e w i t h i n t he
N
a v a l
A i r Sy s t e
m
s Co
mm
and ,
D
epa r t
m
en t o f t he
N
a v y , and I s
a v a i l ab l e f o r us e by a l l Ck?pa r t
m
en t s and Agenc i e s o f t he
O
epa r t
m
e
m
t o f i ) e f e n s e .
1 .
SC
O
PE
1 . 1 Scope .
Th i s spe c i f i c a t i on con t a i ns t he gene r a l and d e t a i l d e s i gn
r equ i r e
m
en t s a nd c r i t e r i a i n t h e d e s i gn and cons t r u c t i on o f
afrplanes to:
a .
P r e c l ude f l u t t e r , d i v e r genc e , and o t h e r dy n a
m
i c and s t a t i c
a e r oe l a s t l c i n s t a b i l i t i e s .
b . Con t r o l s t r uc t u r a l v i b r a t i on s .
c .
L i
m
i t v i b r a t i on l e v e l s i n
crew and p a s s e ng e r s t a t i on s .
d . P r e c l ude f a t i gue c r a c k i ng i n i t i a t i on o r de l a
m
i na t i on o r any o t h e r
f a t i gue f a i l u r e o f t h e a i r f r a
m
e s t r uc t u r e o r s t r u c t u r a l co
m
ponen t s
i nduc ed b y v i b r a t i ons , a e r oa cous t i c and o t h e r os c i l l a t o r y l oads f o r
t he s e r v i c e l i f e o f t he a i r p l ane .
e .
P r e s c r i be a e r oe l a s t i c a nd d y n a
m
i c an a l y s e s and s t r u c t u r a l dyna
m
i c
f l i gh t t e s t s r equ i r ed t o a s su r e co
m
p l i anc e w i t h de s i gn
r equ i r e
m
en t s .
1 . 2 App l i c a t i on .
Th i s s p e c i f i c a t i on I s app l i c ab l e t o a i r p l a n e s a cqu i r e d
by t he
N
a v y f o r
all cond i t i ons o f f l i gh t and s u r f a c e ope r a t i ons f o r wh i ch t he
a i r p l ane s a r e r equ i r ed t o ope r a t e .
e
AP4SC
N
/ / i
FSC 1510
D
I ST
R
I B
U
T I
ON
STATEME
N
T A .
App r ov ed f o r pub l i c r e l e a s e ; d i s t r i bu t i on i s un l i
m
i t ed .
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