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Safe Distances

The following table shows minimum safe distance and site dimension information.

how to use this table;

Check the left column for the impulse/motor you intend to fly, follow the row across the table to find you minimum safe distance from the rocket at launch and also the minimum dimensions for the launch.

Total Impulse of all motors (Newton-seconds)

Equivalent motor type

Minimum distance from rocket with single motor in meters(feet)

Minimum distance from rocket with multiple motors in meters(feet)

Minimum site dimensions in meters (feet)

Equivalent dimensions in km (miles/yards)

0.00 – 1.25

¼ A ½ A

2 (7)

3 (10)

15 (49)

0.015km  (16 yards)

1.26 – 2.50

A

2 (7)

3 (10)

30 (98)

0.03km  (33 yards)

2.51 – 5.00

B

3 (10)

6 (20)

60 (197)

0.06km (66 yards)

5.01 – 10.00

C

3 (10)

6 (20)

120 (394)

0.15km (130 yards)

10.01 – 20.00

D

5 (16)

10 (33)

150 (492)

0.16km (164 yards)

20.01 – 40.00

E

7 (23)

15 (50)

300 (984)

0.3km (328 yards)

40.01 – 80.00

F

10 (33)

20 (66)

300 (984)

0.3km (328 yards)

80.01 – 160.00

G

10 (33)

20 (66)

300 (984)

0.3km (328 yards)

160.01 – 320.00

H

15 (50)

30 (98)

450 (1,476)

0.5km (492 yards)

320.01 – 640.00

I

45 (148)

60 (197)

760 (2,493)

0.8km (½ mile)

640.01 – 1280.00

J

45 (148)

60 (197)

1600 (5,249)

1.6km (1 mile)

1280.01 – 2560.00

K

60 (197)

90 (295)

1600 (5,249)

1.6km (1 mile)

2560.01 – 5120.00

L

90 (295)

150 (492)

3200 (10,498)

3.2km (2 miles)

5120.01 – 10240.00

M

90 (295)

150 (492)

4700 (15,420)

4.7km (3 miles)

10240.01 – 20480.00

N

150 (492)

300 (984)

6445 (21,145)

6.5km (4 miles)

20480.01 – 40960.00

O

150 (492)

300 (984)

8045 (26,394)

8.0km (5 miles)