MIL-C-7011B Charger, Gun Type B-1

8/11/2019 MIL-C-7011B Charger, Gun Type B-1

1/10

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)

by Information andling Servicescensed by Information Handling Services


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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



3/10

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.

3

censed by Information Handling Services


4/10

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

4


5/10

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

5


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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,

6


7/10

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.

7



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MIIrC-701lB

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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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.

9



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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

MIL-C-7011B Charger, Gun Type B-1

Documents

Transcript of MIL-C-7011B Charger, Gun Type B-1