Answers.Body: <p>Just today I tried to use it quite successfully as an alternative to suspension springs. Right now I don't have it assembled so I can't post a screenshot, but the idea is to wind up the pullback motor then attach it to your construction with a cross axis from one side and beams from another and limit its moving with some details. If you are interested in how I have done it, I will assemble it to demo and post images.</p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2014-06-10T11:53:33.327Z
Answers.Text: An interesting application to be sure :)
Answers.UserDisplayName: Zhaph - Ben Duguid
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-03-03T16:30:40.810Z
Answers.Text: that doesn't work with all pullback motors. Some need less turns to wind up than they provide when turning back.
Answers.UserDisplayName: bb1950328
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2014-02-18T18:54:36.553Z
Answers.LastActivityDate: 2014-02-18T18:54:36.553Z
Answers.UserDisplayName: Sergei Basharov
Answers.Body: <p>Build a catapult with it. The catapult arm would be attached to the motor. Pulling the arm down will wind the motor</p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2014-07-17T19:51:08.963Z
Answers.LastActivityDate: 2014-07-17T19:51:08.963Z
Answers.UserDisplayName: Daniel
Answers.Body: <p>Once I built a hand-powered semi-automated screwdriver toy for kids. They needed to "charge it" first by rotating a gear and then push a button to release power. Then they could apply it to a crane or other models. </p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2014-06-09T19:03:07.360Z
Answers.LastActivityDate: 2014-06-10T11:14:06.513Z
Answers.LastEditDate: 2014-06-10T11:14:06.513Z
Answers.UserDisplayName: Konstantin Petrukhnov
Answers.Body: <p>I built a ball launcher out of one. Kind of like a baseball launcher.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2021-01-07T09:00:14.070Z
Answers.Text: Hi Alex and welcome to Bricks.SE! Your ball launcher sounds interesting, could you please post a picture of it?
Answers.UserDisplayName: zovits
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2021-01-03T21:42:58.543Z
Answers.LastActivityDate: 2021-01-03T21:42:58.543Z
Answers.UserDisplayName: Alex Carrier
Answers.Body: <p>Yoshihito Isogawa made clock mechanisms from it (well... tic-tac generators) <a href="http://www.isogawastudio.co.jp/legostudio/modelgallery_model/b077.html" rel="noreferrer">http://www.isogawastudio.co.jp/legostudio/modelgallery_model/b077.html</a>
  and <a href="http://www.isogawastudio.co.jp/legostudio/modelgallery_model/b078.html" rel="noreferrer">http://www.isogawastudio.co.jp/legostudio/modelgallery_model/b078.html</a>.</p>
  
  <p>Majorna created a "programmable" pull back racer <a href="http://www.eurobricks.com/forum/index.php?showtopic=69748&amp;#entry1744425" rel="noreferrer">http://www.eurobricks.com/forum/index.php?showtopic=69748&amp;#entry1744425</a></p>
  
  <p>...and another clock by neomomonga: <a href="http://www.youtube.com/watch?v=F3-CDFw4O38" rel="noreferrer">http://www.youtube.com/watch?v=F3-CDFw4O38</a></p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2013-12-04T10:12:06.243Z
Answers.Text: The clock ! that's obvious now that you mention it !
Answers.UserDisplayName: Stephane Delcroix
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2013-12-04T08:51:44.947Z
Answers.LastActivityDate: 2013-12-05T14:40:21.607Z
Answers.LastEditDate: 2013-12-05T14:40:21.607Z
Answers.UserDisplayName: Philo
Body: <p>Sets 42010 and 42011 feature <a href="http://www.bricklink.com/catalogItemIn.asp?P=12787c01&amp;in=S" rel="noreferrer">a pull-back motor</a>. They have a very high torque for a very small numbers of turns, they then free-wheel.</p>
  
  <p>I'm trying to find alternate usage for them. That is anything but connecting them directly to the wheels without gears, as putting any gear demultiplication is great while the motor is turning, but it quickly prevents the vehicle moving when free wheeling.</p>
  
  <p>What I've managed to do so far:</p>
  
  <ul>
  <li>Using it to launch a spinning top</li>
  <li>Launch a rotor blade</li>
  </ul>
  
  <p>Anything else ?</p>
  
Tags: <technic><piece-usage>
Title: What other uses are there for pull-back motors?
UserDisplayName: Stephane Delcroix
ThreadText: # What other uses are there for pull-back motors?
  
  (Asked by: username_0 on 2013-12-03)
  
  Sets 42010 and 42011 feature [a pull-back motor](http://www.bricklink.com/catalogItemIn.asp?P=12787c01&in=S). They have a very high torque for a very small numbers of turns, they then free-wheel.
  
  I'm trying to find alternate usage for them. That is anything but connecting them directly to the wheels without gears, as putting any gear demultiplication is great while the motor is turning, but it quickly prevents the vehicle moving when free wheeling.
  
  What I've managed to do so far:
  
  * Using it to launch a spinning top
  * Launch a rotor blade
  
  Anything else ?
  
  **Tags:** technic, piece-usage
  
  
  ---
  
  ## 5 answers
  
  ### Answer by username_8 on 2013-12-04. Score: 8 | Accepted answer
  
  Yoshihito Isogawa made clock mechanisms from it (well... tic-tac generators) <http://www.isogawastudio.co.jp/legostudio/modelgallery_model/b077.html>
  and <http://www.isogawastudio.co.jp/legostudio/modelgallery_model/b078.html>.
  
  Majorna created a "programmable" pull back racer <http://www.eurobricks.com/forum/index.php?showtopic=69748&#entry1744425>
  
  ...and another clock by neomomonga: <http://www.youtube.com/watch?v=F3-CDFw4O38>
  
  > **Comments:**
  > **username_0**: The clock ! that's obvious now that you mention it !  
  
  ---
  
  ### Answer by username_1 on 2014-02-18. Score: 7
  
  Just today I tried to use it quite successfully as an alternative to suspension springs. Right now I don't have it assembled so I can't post a screenshot, but the idea is to wind up the pullback motor then attach it to your construction with a cross axis from one side and beams from another and limit its moving with some details. If you are interested in how I have done it, I will assemble it to demo and post images.
  
  > **Comments:**
  > **username_2**: An interesting application to be sure :)  
  > **username_3**: that doesn't work with all pullback motors. Some need less turns to wind up than they provide when turning back.  
  
  ---
  
  ### Answer by username_4 on 2014-07-17. Score: 3
  
  Build a catapult with it. The catapult arm would be attached to the motor. Pulling the arm down will wind the motor
  
  
  ---
  
  ### Answer by username_5 on 2014-06-09. Score: 3
  
  Once I built a hand-powered semi-automated screwdriver toy for kids. They needed to "charge it" first by rotating a gear and then push a button to release power. Then they could apply it to a crane or other models.
  
  
  ---
  
  ### Answer by username_6 on 2021-01-03. Score: 0
  
  I built a ball launcher out of one. Kind of like a baseball launcher.
  
  > **Comments:**
  > **username_7**: Hi username_6 and welcome to Bricks.SE! Your ball launcher sounds interesting, could you please post a picture of it?  
  
  ---
  
  