8/11/2019 MIL-C-7011B Charger, Gun Type B-1
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M I L C 7 0 L L B
9 9 9 9 9 0 b 1494380 850 W-~
MIL C 701
IB
2
NOVEMBER 954
superseding
m-c-o07011A( USAF)
15
December
1953
14
September 1950
MIL-C-7Oll
KLLITAEIY SPECIFICATION
CHARGE, GUN, CALIBER .SO M3, AUTOMA EC,
TYPE
B-1
This specification has been approved by the Department
of Defense fo r use of th e Departments of t he
Army
t h e
Navy, and t h e A i r Force.
1. SCOPE
1.1
This sp ecif ica t ion covers one type of ca l i ber
.SO
M3 gun, aut oma tic charger,
desi gnat ed Type
B-l .
2.
APPLICABLE
DOCUMENTS
2.1 The follotri ng spe cif ica tio ns, standards, drawing, and publ icati on, of th e
i s s u e i n e f f e c t on d a te of inv i t a t i on fo r b ids, form
a
p a t of th is s p e c i f i c a t i o n t o t h e
extent specified hereirr:
SPECIFICATIONS
Federal
NN-P- 515
PPP-B-601
Mil i ta ry
MIL-A-140
MIL-SS272
M I L - P - ~ ~ ~
MIL-S-7742
MIL-S-8SO3
MIL-W-6101
JAN-P-100
JAN-P-306
JAN-?-
08
JAN-P- 125
Plywood, Co ntain er Grade
Boxes, Wood, Cleated-Plywood
Adhesive, Water-Resistant, Waterproof Barrier-
Environmental Testing, Aeronautical and
Material
Associa ted Equipment, General Sp ec if ic at io n
or
Preservation, Methods of
Screw Threads, Standard, Aer ona uti cal
S t e e l
B a r s ,
Chrome-Vanadium
(6150)
(Aircraf t
Wire; Spring St ee l (For Air cr af t Application)
Packaging and Packing f o r Overseas Shipment
General Specification
Packaging and Packing f o r Overseas Shipment
Boxes; Wood, Nailed
Packaging and Packing for
Overseas
Shipment
Boxes, Fi be rb oa rd (V-Board and W-Board),
Exter ior and Inter ior
Packaging and Packing for Overseas Shipment
Barrier-Material, Waterproof, Flexible
Qual i ty)
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_ _
M I L C 7 0 1 1 B
9999906
1494381 797
ML-C-701lJ3
JAN-P-127
STANDARDS
MIL-STD-129
MIL-STD-130
Packaging and Packing for Overseas Shipment
Tape, Adhesive, Pressure-Sensitive, Water
Res is tant
Markhg for Shipment and Storage
I d e n t i f i c a t i o n
Marking
of
U.
S. Mil i t a ry
Property
DRAMEXIS
A i r Force-Navg Aer ona uti cal Stand ard Drawing
AND lOO~O
Bosses-Standard Dimensions f o r Gasket Seal
Straight Thread
PUBLICATIONS
A i r Force-Navy Aeronautical Bulletin
No.
143
Specif ica t ions
and
Standardsj
Use
of
(Copies of s pec ifi cat ion s, standards, drawings, and pub lic ati on s req uir ed by con-
t r a c t o r s
i n
connection with s pe ci fi c procurement unctions should be obta ined
from
t h e
procuring ac t iv i ty o r as di r ec ted by the contrac t ing off icer . )
3. REQUIREMENTS
3.1
Component pa rts .- The Type B-1 charger sh al l consi st of the following:
Automatic el ec tr ic , pneumatic gun-bolt re tr ac to r mechanism, electropneumatic se ar
actu ator , e le ct ri c ammunition rounds counter impulse switch assembled toge ther w ithi n
a d t i p i e c e metal housing with mounts, and
an
ex ter na lly mounted
AN
receptacle.
3.2 Materials.-
3 .2 .1
Pr ote cti ve treatment.. When ma ter ial s are used i n th e construc tion of th e
charger tha t a re sub jec t t o corros ion i n
sa l t a i r
or other atmospheric conditions l ikely
t o occur during servi ce usage, they s ha ll be pro tec ted against such corrosion i n a manner
t h a t Wu1 in no way prevent compliance w i t h the performance requirements of t h i s speci-
fication.
exbreme atmospheric con diti ons s h a l l be avoided.
The use of any protective coating that
will
crack,
chip, o r scale with age or
3.2.2 Sel ect ion of materials.- Spe cif ica tio ns and standards fo r
a l l
materials ,
pa rt s, and Government ce rt if ic at io n and approval of pro cesse s and equipment, which
are
not s pe ci fi ca ll y designated herein and which a re necessary fo r th e execution of th is
specif ica t ion, sha l l be s e lec ted i n accordance Kith
ANA
Bulletin No.
143,
except as
provided i n th e following paragraph.
3.2.2.1
Standard parts .- Standard pa rt s (MS,
AV,
o r JAN) s h a l l be used wherever
they are su itab le for th e purpose, and sh al l be iden ti fie d on the drawing by th ei r pa rt
numbers. Commercial u t i l i t y pa rt s such as screws, bo lt s, nuts,
co tt er pins, et c, may be
used, provided they possess sui tab le prope rties and ar e replaceable by th e s tandard
p a r t s
(MS, AN,
or
JAN
without alteration, and provided
t h e
corresponding standard park
numbers are referenced in t h e p a r t s
l i s t
and, if pract icable , on the contrac to r ' s
drawings.
da te
of
inv ita ti on f or bids, com erc ial p art s may be used provided they conform to all
requirements of this specification.
I n the event the re
i s
no su ita ble corresponding standard par t i n effe ct on
2
164
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M I L C 7 O L L B m
9999906 1494382
623
m
3.3
Design,.-
The gun charger sh a l l be designed t o e xert a driving fo rce a gain st
the gun bol t s tud through th e e nt i r e length
of
th e gun bo lt t ra ve l (7.25 inches) under
a
mni mum
gas pressure of 400 ps i .
actuate the sear s l i de on the gun bo l t as w e l l a s e l e c t r i c a l i n p u l s e s t o n external
rounds counter.
It s h a l l a l so be required t o provide
50
p s i t o
3.3.1
Mounting.-
The gun charger s h a l l be arranged
for
i n s t a l l a t i o n on e i t h e r t h e
r ight - or lef t -hand s ide of the
caliber
50 M3 machine gun without ad di ti on o r subtrac-
t ion , and with a
mni mum
interchanging of parts.
f rom the s ide p late of the cal iber
.SO
M3 gun, using th e rectangul ar s l ot s provided fo r
t h i s purpose.
3.3.1.1
The charger s h a l l be arranged t o permit i t s quick attachment t o or removal
3.3.1.2
The gun charger sh al l be adequately sea led t o permit use under all
environmental conditio ns.
3.3.2 JZLectric conne ctor recep tacl e.-
n AN
s ta nd ar d e l e c t r i c d r e c e pt a c le shall
be used
on
the charger assembly.
3.3.3
Pneumatic fittings.- All pneumat ic f i t t i ng s sh al l be the N type for a
sta ndar d 3/16-inch tube.
3.3.4
Voltage.-
The normal operating voltage of the charger s ha l l be 28 vol ts dc.
The charger shall
be
capable of operating on
a
minimum
of 22 vo l t s a t
a
gas pressure of
8 ps i .
3.3.5
Current.-
The current requirements of the charger s h d l not exceed 7
amperes during operation and gun i re .
3.3.6
Coils.-
The f in i sh ed so lenoid co i l s s ha l l be taped and impregnated with a
moisture-proof and hea t-r esi sta nt pr ote cti ve coating.
One end of each c o i l assembly sh a l l be grounded t o t he charger housing i n a
manner
t h a t
w i l l
insu re a good el ec tr ic al connect ion.
A U c o i l l e a d s s h a l l be f l e x i b l e .
3.3.7
Mechanical details,-
No assembly sh a l l depend so le ly
on
s o f t s o l d e r f o r
mechanic a l st rength.
3.4
Construction.- The gun charger sh a l l be cons truc ted
to
meet t h e requirements
of
f i gu re
1.
withstand the strains, ja rs, vibrat ions , and other condit ions inci dent t o shipping,
s torage, in s ta l la t io n , and serv ice.
No
par t s of t he charger sha l l
work
l oose i n se rv ice .
Further, it s h a l l
3.4.1 Gun bolt retractor mechanism.-
3.4.1.1
The
gun
bol t re t rac tor mechanism sh al l con sis t
of
a pneumatic cylinder
and piston capable of r e t r ac t i ng t he gun b o l t 7.25 inches.
3.4.1.2
Suf f i c i en t e l ec t r i ca l and mechanica l con t ro l s t o r e tu rn t he bo i t r e t r a c to r
p i s t o n t o
i t s
(ba t t e ry ) s t a r t i ng pos i t i on sha l l be i nco rpo rat ed i n to t he bo l t r e t r a c t o r
mechanism.
by the ret rac tor p i s ton dur ing the ret urn s t roke.
p i s ton du r ing gun f i r i ng sha l l no t be a f f ec t ed by t he i n er t i a fo rces
of
t h i s p a rt
induced by the o sci l la t io ns of t he
gun.
The forward motion of t he gun bo lt assembly sh a ll be i n no way re st ri c te d
The forward posi t ion of the retractor
3.4.1.3
A mechanical time delay sh a l l be i nco rpo rat ed wi th in t he r e t r a c to r
mechanism to control the cycling o f the
gun
b o lt t o a
m a x i m u m
of 800 mill iseconds with
400-psi a i r pressure supplied t o the charger piston.
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MIL-C-701lEI
9 250
F BOLT STUD
O F BOLT STUD
I r
*3i2 I
\ I I
FRONT OF GUN
AN CONNECTOR
\
I I
1.
750
DIMEN3IONS
\\ BOSS DRAWERr AND1 5
FOR 3/16 TUBE
I N IKHES. TOLERANCES: DECIMALS i.015.
FIGURE 1. Gun charger
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MIL-C-7Oll-B
3.4.1.4
When a voltage of 28 volts dc i s appl ied continuously and 4OO-psi a b
pressure
i s
supplied, the re tr ac to r mechanism cont rols s h al l be energized automatically
and the retractor piston shall complete charging cycles as necessaxy unti l the gun
fires.
Further,
i f
a stoppage occurs during firing, the control
system
sha l l ene rg ize
the charger and clea r th e s5oppages within an interval not exceeding
800
milliseconds,
whereupon gun f i re can be automatically resumed when the charging
cycle i s
completed.
Innnediately upon completion of f i r ing , the gun bo l t sh a l l r e tu rn to ( b a t t e r y ) s t a r t i n g
posi t ion. The re t r ac to r controls sh al l be s o designed that when an electrical impulse
is
appl ied by
a
remotely controlled switch o r thermostat , the re t r ac to r piston sh al l
drive
the gun bol t to th e r e a r , h which posi t ion
it
sh al l be retained without cu rrent
consumption u n t i l rel eas ed . When 28 vol ts ar e then applied continuously through the
gun f i r i n g switch, t he charger shall permit the gun b o l t
t o
return t o ( b a t te r y) s t a r t i n
posit ion,
3.4.1.5
The re tr ac to r mechanism sh a l l be designed t o permit l o c a l manual non-
e le c t r i ca l con t ro l fo r re t rac t ing and re t en t ion of the bo l t i n i t s rear posit ion and
subsequent release.
3.4.2 Eectropneumatic sear actuator.-
3.4.2.1
The sear actuator sh al l be as s m a l l and as l ight a
u n i t
a s
i s
consistent
with the requirements of fo rce and inter cha nge abi lity i n mounting as specifLed herein.
Control and operation of the sear actuator s ha ll be independent of t he
gun
charger and
the rounds counter.
configuration
of
the gun charger,
The
air
l i ne t o th e se= actuator shalL not proje ct beyond the
3.4.2.2
The sear act uat or sh a ll cons ist of a solenoid-operated pneumatic-actuated
mechanism with housing and the necessary linkage between the actuating mechanism and th
sea r s l id e of the ca l ibe r .SO M 3 machine gun. The ac tu at in g mechanism and in te rc on ne ct
ing l inkage w i l l be contained as a u n i t in the housing,which
w i l l
be designed to protec
the uni t from sand, dust, and other foreign
matter.
ruggedness t o withstand, without damage, serv%ce usage, and s h a ll be of s uf fi ci en t
st rength to wi thstand, without distor t i on, th e opposing force t o t ha t created by the
actuating mechanism housed within.
The housing shali be
of
suff icient
3.4.2.3
A l l
parts of the sear ac tua tor sh a l l be
SO
designed and constructed as t o
be able t o withstand, without damage, d is to rt io n, o r
displacement, th e for ces of i n e r t i
t o which th e complete
u n i t will
be subjected as a resi il t of f o re and
af t
o s c i ll a t io n s a
a
distance
o f
0.2
i nc h a t
a
ra t e o f
1,500
cpm.
gas pressures ranging from
400
p s i t o 1 500 ps i .
m i n i m u m for ce of ounds again st th e gun sear s l i d e a t an operating gas pressure of
400
psi .
be suitably protected therefrom.
a s t o a ssure t ransmiss ion of the for ce created by the actuat ing mechanism t o th e sea r
s l i d e of th e gun without bending
o r
other di sto r t io n and s ha l l be supported
in
such a
manner as t o withstand a l l forc es imposed thereon, i n additio n
t o
those exerted through
the l in e of th rus t .
actuating mechanism t o th e sear s l i d e of the g uns hal lbe held t o
a
minimum,and the
design of th e interconnect.ing l inkage sh all be such tha t a
m a x i m u m
control
of
manufac-
tur ing tolerances w i l l be possible.
starting position within the housing must be accomplished without the aid of the
gun
se m re turn spring.
thereof a ret urn sp ring of st ee l wire
i n
accordance with Specification
m-W-6101
whic
dll
e turn the p lunger t o
i t s
fu l l y open posi t ion, thereby re t rac t ing the sear pin
when the current i s interrupted.
minimum.
It s ha ll be capable of operating under
It sh al l be capable o f exerting a
The a ctua ting mechanism s h a l l be impervious t o damage from lub ric an ts o rs h al l
The interconnecting l inkag e sh al l be of such stre ngt h
The number of p ar ts required t o transmit the force created by t he
Return of the interconnecting linkage t o i t s
The sear actuator s ha l l be designed to conta in as an i n t e g r a l p a r t
The force of
this
spr ing sha l lbe he ld to a p r a c t i c a l
3.4.2.4
Sear actuator adjustment.-
An adjustment sh al l be s o provided on the top
of t he sear a ctuator housing tha t the protru sion o f the sear pin can be varied by
m e w
of a sta ndard co me rc ia l wrench.
The adjustment means sh al l not be made in t e g r a wi th
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flIL-C-7011 9999906 1494385 332
MIL-C-70118
the plunger and ash al l be s e a le d to prevent the ent rarice of fore ign mat ter in to the
housing. The direc tion of rot ati on of the adjustment, t o increase sear protrysion,
shall be counterclockwise when viewed f rom the adjustment side of the sear actuator
housing.
It
sh al l be c le ar ly indicated with an arrow and marked ttIM.
3.4.2.4.1
Adjustment increments.- This sea r pi n protrusion sh al l be adj ust abl e i n
increments of 0.003 inch.
actuato r housing t o lock the adjustment t h a t when s e t a t any pos it io n the s et t i ng wl l
not be changed as a r e su l t of vibrat ions encountered i n se rvice use.
Suitable means shall be
s o
provided a t the top of the sear
3.4.2.4.2
Manual
sear
release.-
A manual-release button
shall
be
so
incorporated
It
shall not affect the performance
of
the solenoid under
on top
of
th e s ear actuating solenoid plunger th at manual operation can be eff ecte d
f r om
outside the charger housing.
oper atio n and not extend more than 3/16 inch above th e top of t he c harger housing, but
retract when pressure
i s
dthdrawn.
3.b.2.4.3
Manual. sear-release guard.-
A guard sh al l be provided on top of the
sear ac tuator
housing
to protect the manual sear release from damage and actual opera-
ti on of t he gun charger. 'The guard s h al l no t extend more than 9 / 32 inch above the top
of t he c harger housing and sh a l l no t a ff ec t th e movement of th e manual sear re lease .
with Specification M Z L - S - ~ ~ O ~ ,r other al loy ste el s of equivalent physical character-
istics.
The bearing surfaces and that portion of the cam that contacts the
sear
s l i d e
o f
th e gun sh a l l be hardened t o Rockwell
ttC1l 55
t o 60.
ground and polished.
degrees,
protrusion, whenxhe sear actuator i s energLzed, i s 0.322 io.01~ 0.000 inch.
adjustment range measured
f r o m
t h i s dimension s ha ii be 0.100 inch m i n i m u m .
pin protrusion when the sear actuator
i s
deenergized sh a l l not exceed 0.212 inch.
above dimension shall be measured from the top of the sear pin t o the ou t s ide sur face
of
the mounting plate.
3.4.2.5
Sear pin.-
The s ear pin sh al l be fab r ica ted of al loy s t e e l i n accordance
The surfaces so t r e a t e d sh a l l b e
The angle of t he cam surface of t h e se ar pi n s h a l l be 37 21/2
3.4.2.5.1
AdJustment.-
The sear pin s ha l l be s o ad jus tab le tha t the maxi mum
The
The sear-
The
3.4.3
Rounds counter impulse switch.-
3.4.3.1
operate
a
rounds counter.
t h e cycle,
a t
28 vol ts dc a t a ra te of 1 500 times per minute.
c i r c u i t may be grounded t o t he charger frame.
The rounds counter impulse switch sh al l provide el ec tr ic al impulses t o
The switch shall be closed
f o r
two-thirds
o f
the
gunfire
It shall be capable of making and breaking an inductive load of 0.5 ampere
The
rounds
counter impulse switch
3.4.3.2
The switch sh al l be of su ff ic ie nt ruggedness t o withstand, without damage,
service usage and the induced vibrations and shock impulses o f the gun without distor-
%ion o r malfunction.
3.5
Interchangeability,- A l l
par ts
having the
same
manufacturer's part numbers
sh al l be dir ect ly and completely interchangeable with each other with re spe ct t o i ns tal -
lation and performance.
3.6
Screw threads.- Screw thre ads sh a l l be
in
accordance with Specification
KSL-S-7742.
3.7
Weight.- The weight
of
th e charger s h al l not exceed 4 pounds,
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3.8
Performance.- The gun charge r s h a l l perform i t s charger funct ions
as
require
for aircraft and meet the fol lowing
tests
of Section
4:
(a)
Leakage
A i r
pressure
(b)
(c )
(d)
Firing
Actual load
Operation
Over-all
with dunrmy
load
Environmenta l Low and hi gh tem pera ture
Al t i tude
Humidity
309 Ide nt ifi ca ti on of product.- Equipment, assemblies, and pa rt s sh a l l be marked
for i d e n t i f i c a t i o n
i n
accordance with Standard NIL-STIF.130.
3.10
Workmanshie.- The completed gun cha rger s h a l l be free of defects which may,
af feck .serv iceabi l i ty ,
functioning, operation, or appearance.
4. Q U A L I T Y
ASSURANCE
PROVISIONS
4.1
Class i f i ca t i on
of
t es t s . -
The inspecti on and te st in g of gun chargers sh a l l b
class i f ied as fo l lows:
(a) PreproductLon
tests:
Preproduction tests are those t es t s
performed
on
samples representative of the production of
t h e
i t e m
after the award
of
c ont rac t, t o d e t e r b e t h a t th e
production meets the requirements of tus speci f icat ion .
(b) Acceptance te st s: Acceptance tes ts are those tests performed
1: individual lots which have been submitted for acceptance.
4.2
T e s t conditions.-
Tests as l i s t ed here in sh a l l be conduct ed a t a temperature
of approximately 68 F unless otherwise specified.
4.3 Preproduction tests.-
4.3.1
Sampling ins truc tions .- Two gun chargers as speci f ie d i n the cont ract w i l
be tested for design approval by the procuring activity, or when SO speci f ied i n t he
contraci,, a t the contractor 's plant under the supervision of the procuring act ivi ty.
4.3.2
ests.-
The Preproduction tes ts of gun chargers sh a l l co nsist of
al l
t h e
t e s t s
specified under Acceptance t es t s and, in addit ion, th e following te st s.
Sand and dust.-
.3.2.1
The charger s ha ll be s ubje cted to t he Sand and dust
tests, Procedure
I
of Sp ec if ic at io n MIL-E-5272.
be covered during the test .
chambers,
it
sh al l be checked fo r mechanical operation and conti nui ty of the charger
c i r cu i t s .
The open end of the charger case shl.
After the charger has been removed from the
sand
and dust
There sh a l l be no mechanical o r e l e c t r i c a l f a i l u r e a s a resul t of t h k i t e s t ,
4.3.2.2
Sa l t spray ( fog) .- The charger sh al l be subjected t o the Sa l t spray t e s
i n accordance with Specification MIL-E-5272,
hours.
complet ion of th e s a l t spray the charger sh al l be allowed t o dry and s h a l l be checked
fo r mechanical operat ion and continui t y of ci rcu i t s.
result
of t h i s
tes t .
The duration of t he t e s t s h a l l b e 100
A t
t hehe open end of the charger case shall be covered during this t e s t .
There sh al l be no fa i l ur e as a
4.3.2.3
Fungus resistance.-
The charger sh al l be subjected to the Fungus re sis t-
ance
test ,
Procedure
I,
of Speci f icat ion MCL-E-5272.
4.3.2.4
Insulation .- The charger sh al l be so i n su l a t ed t ha t
i t will
withstand
an
a-c potential of 500 v o l t s
a t
commercial frequency between either terminal and any
other exposed parts for
60
seconds.
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Acceptance tests.-
The Acceptance te s t s sh al l consis t of Indiv idual te s t s
and Sampling tests.
tests.
441
4.4.1.1
Examination
of product .- Inspect ions with regard t o materi als,
workman-
Indiv idual tes t s . -
Each gun charger shall
be
subjected to the fol lowing
ship , dimensions, and markings sh a l l be accomplished fo r conformance with t h i s sp ec ifi ca -
t ion .
4.4.1.2
Leakage,- With
a
pressure of 800 ps i applied, leakage sh al l not exceed
2
cubic inches per minute, fr ee a i r .
4e4.1.3
Operation.-
The charger s ha l l be te st ed by f i r in g 25 rounds (with
a
dummy round) e v m d s i th no m alfunc tions o r breakage. A rounds counter s h a l l be
in st a ll ed t o check rounds counter impulse switch operation.
by lo ca l manual cont ro l pr ior t o gunf i re te s t in g and cycled 5 t imes a f t e r gun f i ri ng t e s t
as
well.
gun f i r e t es t .
It
sh al l be cycled 5 times
A l s o i t sh al l be cycled 5 t i l ies by remote manual control before and after
4.4.2
Sampling tests.-
One gun charge r assembly s h a l l be se le ct ed a t random from
t h e
f i rs t 100
production unit s, and sub mit ted to t he following Sampling te st s.
t he f i r s t
100
uni ts, one charger s ha l l be se lec ted a t random from each succeeding l o t of
1,000 unit s, and subjected t o th e Sampling t e st s,
terminated
a t
the d iscret ion of th e procur ing a ct id ty , fo llowing which one charger sh al l
then be selecte d
a t
random from each succe eding l o t of
5,000
un it s and submitted t o th e
Sampling tests.
Following
T h i s sequence of tests may be
There sh al l be no fa i l ure s as
a
result o f t h e se t e s t s .
4.4,2,1
Operation.-
The piston assemblies of the retractor assembly and sear
actuator shal l operate smoothly through their f u l l working stro ke under gas pre ssu re
( a i r o r nitrogen)
of
400 p s i minimum and 800 p s i m a x i m u m and sh al l re turn promptly to
t i e i r s t a r t i n g p os i ti o ns b y a c t i o n
o f
re tu rn springs when t he operat ing pressure i s
released.
4.4.2.2
Low temperature,- Af te r being subj ect ed t o temp eratu re
of
-65F for
a
m i n i m u m of 48 hours, th e saqple charger operati ng a t this temperature and under a
maximun?
air
pressure of
800
psi , sh al l be cycled
500
t imes while exerting
a
dr iv ing
fo rce agains t t he ca l i b er
.SO
M3 machine gun bolt stud,
s imulates th e act ion of th e
gun
may be substituted for the gun.
A load te s t f i x tu re which
4.4.2.3
@gh temperature.- After. being subj ect ed t o
a
t empera tu re o f t i 6 0 9 fo r
a minimum
of 48
hours, th e sample charger operati ng a t t h i s temperature and under
a
m a x i m u m
air pressure of
500
ps i sha l l be cyc l ed
500
t imes while exerting
a
dr iv ing
force of
3 5
pounds against a load t e s t f ix ture through a dis tance
of
7.25 inches
(length of
gun
b o l t t r a v e l ) .
Procedure II of Specif icat ion MIL-E-5272.
minute for 1 hour a t a temperature of
-65F.
4.4.2.4
Altitude.-
The charger sha l l be subjected t o the A l t i tude te s t s ,
The charger sh a ll be cycled
3
t imes per
4.4.2.5
Humidity.-
The charger sh al l be subjected t o th e Humidity tes ts , Proce-
Within
15
minutes after removal from the humidityure
I
of S pec i f i ca t i on MIL-E-5272.
chamber, the charger s ha l l operate sat i s fac tor i l y on the
N3
c a l i b e r .SO gun during the
f i r i n g of
100
rounds of ammunition with
a
dummy round every 10 rounds.
4.4.2.6
a
c a l i b e r
.50 M3 gun
without fa il ur e, breakage, deforna tion, or malfunction of
ny p a r t
i n
the assembly.
switch.
Firing.-
The charger sh al l be subjected t o
a
10,000-round fi r i ng t e s t on
A
rounds counter sh al l be used to t e s t t h e rounds counter impulse
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8/11/2019 MIL-C-7011B Charger, Gun Type B-1
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M I L C 7 0 1 1 B M 9997906 1494388 041
4.4.2.7
Seartforce.- The
sear
forc e developed by the sear a ctuat or sh al l be a
m i n i m u m of 50 pounds when
a
gas pressure of 400 p s i i s applied.
be measured before and after the Firing tests.
Rejectio n and
retes t , -
The
s e ar f o r c e s h a l l
4.4.3
If any of the sample chargers
f a i l
t o meet any of
Rejected
l o t s of
chargers may be
he requirements, the en t i re lo t sh a l l be re jec ted.
resubmitted f o r inspect ion only af.ter the contracto r has given the l o t a remedial treat-
ment t o ei th er remove or cor rec t l defec ts .
rejection and the action taken
t o
correc t al l defec ts sh a l l be furnished with each lo t
being resubmitted for inspection.
Ful l particdilars concerning previous
4.5 Destruction i n tests.- AU_ pa rt s, specimens, or assemblies destroyed i n
making
ests
required by this sp ec if ic at io n to determine compliance with requirements
herein,
shal l be in add i tion t o the quan t i ty spec i f i ed i n the contract or purchase
order and sh al l be furnished without increasing the cost of th e co ntrac t or order.
5 PREPhWLTION FOR
DELIVERY
5.1
Application.- The requirements of Se cti on 5 apply only to
direct
purchases
by or direct shipments to the Govermmt.
s e 2
greservation and interior packaging.-
5.2.1
Preservation.-
Unless
otherwise specified, the charger sh al l be prot ected
5.2.2
from corrosion i n accordance with Spec ifica tion MIL-B-il6, method II.
In te ri or packaging.- Each charger sh a l l be sui ta bl y cushioned i n accordance
with Sp ec if ic at io n JAN-P-100 and packaged wi th in an in te r io r con ta ine r in accordance
with Specif ica t ion JAN-P-108.
Tape, when used, sh a ll be i n accordance with Spe cif ica tio n
JAN-P-127
5.3
Packing;.-
a r t i c l e s , s h a l l b e
of
a uniform size,and sh al l be designed t o enclose the contents i n
a
snug, t i gh t- fi t t in g manner.
packed fo r shipment s h a l l not exceed approximately 200 pounds.
Unless otherwise specified, a l l i t ems sha l l be packed for domestic
shipment. Shipping con tain ers,
insofar
as poss ible , sh a l l contain
an
identical number
of
The gros s weight of th e e xt er io r shipping co ntai ner when
5.3.1
Domestic shipment.-
Unless
otherwise specifi ed, '&e in te ri or package sha ll
be packed i n a substantial- com erc ial e-Aerior shipping container constructed t o insu re
acceptance by common
or
o th er c a r r i e r
f o r
sa fe t ranspor ta t ion , a t the lowes t ra te , to
the po in t o f del ivery .
requirements of Consolida ted Fre ight Class i f ica t ion Rules i n ef fe c t a t the t ime of
shipment.
l e s s than
275
pounds
i s
prohibi ted .
storage, rehandling, and reshipment without th e necess ity of repacking.
Except as specif ied herein, th e container s h al l conform t o th e
The use of corrugated
or
sol id fiberboa rd having
a minimum
Mullen test
of
Containers sh a ll be capable of withstanding
5.3.2
Overseas shipment.- Unless otherwise specif ied, t h e in t er io r packages
s h d be packed i n an exter i or shipping container i n accordance with Specification
PPP-B-601 o r JAK-P-106 with a waterproof l i n e r fa br ic at ed from ma te ri al i n accordance
with S pe ci fi ca ti on JAN-P-125, sea led with adhesive conforming t o Sp ec if ic at io n MIL-A-40.
Plywood, when used, s h a l l be i n accordance with Specification NN-P-515, type
I
o r
II
c la s s 2.
s h a l l be marked ir. accordance with Sta ndard MIL-STD-129. The nomenclature s h a l l be a s
follows:
Manufacturer's Part No.
Federal Stock No. ?(if no FSN available, leave space
therefor) .
5.4
Marking of shipments.- In te r io r packages and ex te ri or shipping con tai ner s
Charger, Gun, Caliber .SO M3, Automatic, Type B-1, Sp ec if ic at io n MIL-C-701lB,
*Applicable data t o be ent ered by the contractor.
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8/11/2019 MIL-C-7011B Charger, Gun Type B-1
10/10
6.
N O T E S
6.1
Intended usee- The Type B-1 ch zg er covered by t h i s s p e c i f i c a t i o n i s in tended
t o
be used t o automatically charge and operate the cal ibe r .CO
M3 aircraft
machine guns
i n
various a i rcraf t .
6.2 Orderin data.- Requisiti ons, purchase orders, and con tra cts should s t a t e th e
name,
typgand
_dL_
o e l d es ig na ti on
o f
the equipment, the
t i t l e ,
nuiabeqand date of the
specification8 and l i s t th e components by name and ty pe d esi gn ati on s a s appearing on the
'current Parts Control
L i s t ;
and in di ca te whether overseas o r domestic packing
i s
desired.
chargers on a contract o r purchase order
will be
dependent upon approval of the
t e s t
results on the preproduction sample required by paragraph
4.3.2.
and the contract should specify the point
of
Inspect ion f or these
tes ts .
6.2.1
Provisions. fo r Preproduction
tests.- The
acceptance of the remaining gun
The invi ta t ion for b ids
6.3
odel.- It i s intended that a model of the Type B- l Automatic Caliber .SO M3
Gun Charger, Specification MiL-C-7OlD i l l be made available f o r insp ectio n by prospec-
ti ve bidders .
guidance.
This
model should
a l s o
be furnished t o the successful bidder fo r
his
PATENT
N O T I C E :
When Government drawings, sp ec if ic at io ns ,
o r
other
data are used for any purpose other $han i n
connection with a d ef in it el y re la te d Government procure-
ment operation, th e United St at es Government the reb y
incur s no resp ons ibi l i ty nor any ob ligati on whatsoever;
and the
fact
that the Governmeiit may have formulated,
furnished,
o r
i n any
way
supplied the s a i d
drawuigs,
specif ica t ions , o r o ther da ta
i s
not t o be regarded by
implication or otherwise
as
in any manner licensing the
holder
o r ny other
person or corporation, or conveying
any
r ig ht s or permission t o manufacture, use, or
s e l l
ny patented Invention th at may i n any way be related
thereto.
Custodians;
rm y Ordnance
C o r p s
i r
Force
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