3B Scientific Launcher S User Manual

Page 4

Elwe Didactic GmbH • Steinfelsstr. 6 • 08248 Klingenthal • Germany •

www.elwedidactic.com

3B Scientific GmbH • Rudorffweg 8 • 21031 Hamburg • Germany •

www.3bscientific.com

Subject to technical amendments

3. Equipment supplied

1 Launcher S

3 Steel balls

4. Technical data

Launch angle:

0° – 90°

Maximum range:

4 m

Projectile:

steel ball, 16 mm dia.

Mass of ball:

16.7 g

Approx. dimensions:

280x90x90 mm³

Total weight:

approx. 950 g

5. Apparatus also required

2 Stainless steel rods, 470 mm

U15002

2 Table clamps

U13260

or
2 Stand bases, A-shaped

U8611150

6. Operation

6.1 General instructions

•

Using the clamps or stand bases, set up the
launcher securely on a level surface.

•

Set the required launch angle by loosening the
locking screw slightly, adjusting the angle, and
re-tightening the screw.

•

Stretch the launching spring by sliding the
release trigger and engaging it in notch 1, 2 or
3 according to the desired launching
acceleration.

•

To release the ball, push the release trigger
upward by pressing on the side of it with your
thumb.

Fig. 1 Releasing the launch mechanism

6.2 Oblique, vertical and horizontal launching

•

Place the ball on the front magnetic holder
and set the required launch angle.

•

Release the ball.

Fig. 2 Experiment set-up for oblique launching

6.3 Determining the launch velocity

If the launcher is set in the horizontal launching
position, the launch velocity can be calculated
from the height of the launcher and the range. The
change of the horizontal velocity during the flight
can be neglected.

⋅

v = launch velocity
s = range (distance reached on table)
h = height of launcher
g = 9.81 m/s²

6.4

Comparison between free fall and
horizontal throw

•

Place balls on both the front and the rear
magnetic holders, and set the launch angle to
0°.

•

Release both balls simultaneously.

•

Listen for the sound of the impact of the two
balls.

If the horizontal setting of the launcher is precise,
it is hardly possible to detect a difference between
the two impacts (i.e., the time of fall is the same for
both).