New Endpin Installed: Test Launch

• New endpin has been installed.
• Balloons' weights not measured and distances approximated. This test is only for observations of any noticeable improvement.
  

Test 1

• CW Prop Angle: 180
  
• Appx. Distance: ~90ft

Test 2

• CW Prop Angle: 180
  
• Appx. Distance: ~90ft

Test 3

• CW Prop Angle: 180
  
• Appx. Distance: ~90ft

Test 4

• Tennis Ball Weight: 56g
  
• Tennis Ball Name: Wilson
  
• CW Prop Angle: 180
  
• Appx. Distance: ~90ft

Observations/Conclusions:

• The trebuchet's accuracy is now highly accurate, with every projectile landing in almost the exact location.
• The throwing distance has not been improved.
• Sling is being released too late. Angle of endpin needs adjusted.

Modifications

• Potentially dangerous bolt protruding from bottom of throwing arm has been trimmed.

Future Plans

• Endpin can't be adjusted. New one will need to be made.

New Endpin

A new endpin as been created using a 2in pin compared to the previous 1in pin. The angle of the pin is 30 degrees. It will be tested once the glue has dried.

Endpin modification test launch

• Launched from ground level
• Projectiles: Water balloon, tennis ball
• This was just a test to visually see if the modification made any difference. The balloon distance was approximated. The tennis ball's distance was not measured.
  

Test 1

• Balloon Weight: Not Measured
  
• Balloon Launcher: Rosa
  
• CW Prop Angle: 180
  
• Total Distance: Appx. 90 ft.

Test 2

• Tennis Ball Weight: 56 g
• Launcher: Adam
  
• CW Prop Angle: 180
  
• Total Distance: Not measured

Test 3

• Tennis Ball Weight: 56 g
  
• Launcher: Rosa
  
• CW Prop Angle: 180
  
• Total Distance: Not measured
  

Conclusion:

• The modification did not improve the trebuchet. It's performance was about the same if not slightly worse.

Next Time:

• Create new, longer endpin.

Endpin Modification

Took endpin piece to Bob to be modified.  Pin was removed successfully from the endcap, and bent a few more degrees.  Endcap broke while trying to replace the pin.  Glued together.  Will wait a few days before launching.

Day 16: Physics Camp

Launched balloons from 4th floor at Physics Camp students. Only one balloon's distance was approximately measured.

Test 14

• Balloon Weight: 51 g
  
• Balloon Name: Sue
  
• Balloon Launcher: Adam
  
• CW Prop Angle: 180
  
• Appx. Distance: ~43 m

Record Breaker!