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18B Mortars > M252 > Flashcards

M252 Flashcards

1
Q

What is the nomenclature for the 81mm mortar?

A

M252

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2
Q

What is the nomenclature of the M252 components?

A

Base plate- M3A1
Cannon- M253
Bipod- M177

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3
Q

What is the BAD?

A

Blast Attenuator Device (Helps with over pressure)

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4
Q

What position must the firing pin recess be in to fire the M252?

A

Up position

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5
Q

What are the two bands known as on the M252?

A

Upper and Lower stop bands

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6
Q

What is the elevation range of the M252?

A

0800-1511

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7
Q

One complete turn of the M177 bipods elevation hand wheel equals how many miles?

A

10 mils

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8
Q

One complete turn of the M177 bipods traversing hand wheel equals how many miles?

A

7 mils

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9
Q

What is the total number of mils the M177 can traverse?

A

200 mils, 100 mils each way

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10
Q

What is the minimum and maximum range of the M252?

A

Minimum- 83M

Maximum- 5608M

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11
Q

What are the rates of Fire for the M252?

A

Sustained- 15 rounds per minute indefinitely

Maximum- 30 rounds per minute for 2 minutes

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12
Q

What is the sight unit for the M252 and M224?

A

M67, M64 (old)

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13
Q

When putting the M67/M64 sight into operation the red index line on the coarse deflection should split what two numbers?

A

3 and 2 of 3200 mils

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14
Q

What are the two leveling vials called on the M67/M64

A

Cross level, Elevation level

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15
Q

What is the magnification of the M67?

A

4x

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16
Q

What is the factory elevation for the M45 bore sight? (81 mm bore sight)

A

0800 mils

17
Q

What is the magnification of the M45?

A

3x

18
Q

What is the minimum bore sighting distance for the M252?

A

200M

19
Q

What is the deflection and elevation settings for M252 when bore sighting?

A

Deflection-0000 mils, Elevation- 0800 mils

20
Q

What is the blast radius on the 81mm HE?

A

40M

21
Q

How far away and for how long do you go on a misfire for the 81mm?

A

100M for 1 minute

18B Mortars (6 decks)

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