Instruction Sheet - 3B SCIENTIFIC PHYSICS U10360 Instructions D'utilisation

3B SCIENTIFIC 3B SCIENTIFIC® PHYSICS 3B SCIENTIFIC
3B SCIENTIFIC 3B SCIENTIFIC

Instruction sheet

9/04 MH
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1. Safety instructions
• To check whether there is a projectile in the
launcher and the spring is cocked, the observa-
tion holes 9 should be used exclusively. It is for-
bidden to look through the launch aperture
since there is a risk of injury!
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• Never aim at people!
• Wear protective goggles when performing experi-
ments.
• Always ensure the spring is not under tension and
no projectile is present in the launcher while it is
being stored.
• In order to gain an impression of the projectile
energy, a hand can be placed over the aperture
and a projectile fired at it. The energy is relatively
small (usually there is no danger if a plastic sphere
is thrown 5 m by hand, either).
2. Description, technical data
• The projectile launcher is for experimentally de-
termining ballistic trajectories when a projectile
is launched either horizontally or at an angle.
Angles between 0° and 90° may be selected. Vary-
ing the tension in the spring can also enable 3 dif-
ferent launch velocities to be chosen. The three
settings propel the projectile approximately 1.1 m,
2.3 m and 4.5 m when the launch angle is 45°.
PHYSICS PHYSICS PHYSICS
PHYSICS
U10360 Projectile launcher
U10361 Holder for projectile
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Fig. 1: Components
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Barrel with internal launching mechanism
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Launching lever with cord
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Angle scale
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Aperture
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Holder for projectile launcher (650275)
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Ramrod
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Plastic spheres 3x
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Securing screw
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Observation hole 3x
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End cap
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M8x20 knurled screw with plastic disc for securing projectile
launcher to holder (not visible)
• Clear ratchet points means that the spring tensions
are highly reproducible. The standard deviation of
the trajectory ranges for a launch angle of 45° is
less than 1%.
• Since the projectile launcher is so secured that the
axis about which the barrel is rotated to set the
angle coincides with the center of the projectile as
it leaves the barrel, the launch height is indepen-
dent of the launch angle.
3. Operation and maintenance
• The projectile launcher can be mounted on its
holder U10361 or on the ballistic pendulum
U10362. In this case only the holder is described.
A separate instruction sheet is available for the
ballistic pendulum.
• Holder U10361 is screwed by means of its clamp
to a stable working surface. Then the launcher is
attached to the holder as shown in Fig. 1. The
launch angle can be adjusted with the help of the
angle scale 3 .
• Projectiles should always be loaded when the
spring is not under tension by placing the sphere
in loosely through the front of the plastic cylinder
within the device. The sphere is then pushed down
inside the barrel using the ramrod until the de-
sired spring tension has been reached. The ram-
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