Chase-durer Fighter Command User Manual download pdf (Page 15)

13.

Miscellaneous

At 68 F (20 C), sound travels at 344m or 376yds / 1,129ft per second in air at sea level.° °

Example: Sea level temp is and

lightning to thunder measured time is 17.4

seconds. Distance of lightning strike point

is:

17.4s x 1,129ft = 19,644ft

17.4s x 376yds = 6,542yds

17.4s x 344m = 5,986meters

OR:

17.4s / 4.68s = 3.72 miles

17.4s / 2.66s = 6.54 thousand yards

17.4s / 2.91s = 5.98 kilometers

68 F °

At 32°F (0°C), sound travels at 332m or 363yds /

1,089ft per second in air at sea level.

Therefore, at 32°F (0°C) sound will travel:

1 mile / 1,760 yards / 5,280 feet in

1,000 yards in

1 kilometer in

4.85 seconds

2.75 seconds

3.01 seconds

NOTE:

Therefore, 68 F (20 C) sound

1 mile (1,760 yards / 5,280 feet) in

1,000 yards in

1 kilometer in

To estimate the distance to an event (such as an

explosion, muzzle flash, lightning, etc.), measure

the time from the visual flash to the sound and

multiply the seconds by the per second speed.

For example the measured lightning to thunder

time at 68 F is 10 seconds. 10 x 344m or

376yds / 1,129ft would produce 3,440m or

3,760yds / 11,290ft. (2.14miles)

Alternately, you can divide the measured time at

68 F by 4.68 to get miles (10s / 4.68 = 2.14miles),

or 2.66 for thousand yard distance, or by 2.91 for

kilometers.

at will travel:° °

4.68 seconds

2.66 seconds

2.91 seconds

CHASE-DURER

FIGHTER

COMMAND

ALARM DATE

1/100 SEC330 FEET

9 3

45 15

GENEVE

1 2 ... 10 11 12 13 14 15 16 17

Comments to this Manuals

No comments

Chase-durer Fighter Command User Manual Page 15

Comments to this Manuals

Related products and manuals for Clock Chase-durer Fighter Command