Відео

Tie it to the end of the extension are. The other end will be wrapped around the back axle kind of like a yoyo 🪀 except that the string lets go when it reaches the end. The hammer will pull the extension arm - which will pull the string - which will make the back axle spin. When the string lets go, momentum continues to carry the vehicle along.

@@MrK_Engineering Ok so I should stick the bar and the golden part of the mousetrap together and tie the string at the end of the bar and and wrap it around the back of the axle where you put your big wheels. And when I release it will propel the car forward?

@@shielsingh9602 It should. Remember that the spring is not really a strong tool. You don’t want friction between the wheels and straw. If there is ANY hot glue touching the metal axles, it will cause too much friction for the vehicle to move. Neatness matters on the build. 😅

The string is the thing that makes the vehicle actually move. The string (wrapped around the back axle) pulls on the axle, causing it to roll when the spring pulls on the string. So, you must have something to attach the mousetrap hammer which pulls on the back axle... good luck!

I’m getting better! Thanks for the kind thoughts.

It is so wonderful to hear from you! Miss all of my previous students! Hope you are doing well yourself!

@@MrK_Engineering Sure thing, it was such a fun class. I'm doing great, thank you, hope you are also going well and I hope to visit

???

I have made the Fancy Cup on my 3D printer and it turned out OK. But i did not have time for the students to do it, as we were not allowed to "share" devices this last year. It can be done, but as you know, "Print time" for something like this is very time consuming, about 2 days worth of straight printing. BUT, it was a great project for them to do in Onshape, and really taught them the different tools usage.

@@MrK_Engineering Honestly I'm just relived to see that you seem to be a real person. I wasn't expecting to get recommended that video. Cool project. Those tools are really valuable and I'm sure your students got a lot out of learning them from a competent instructor.

Great question. During COVID it was a whole lot of time, but in class, I think they could get it done in about 180 to 200 min with some flex time for those who require extra help. For your high flyers, you might have them create a place to hold the Fancy Cube - table, shelf, Dragon Pedestal? Gives them room to express their creativity.

@@MrK_Engineering thank you...great work! PS - what about your Automata?? How long for that one? It looks like a great project!

@@jhammons1000 well, it took a LONG time last year. This year I think it will about 4 days total, but maybe another week for the building the real thing. Kits for the frame from the store at PLTW.com

Love it! That is why I made it.

I get them from pitsco.com. The wheels are “X-White wheels”. www.pitsco.com/Shop/Dragsters/Materials-and-Supplies/Wheels/X-White-Wheels The axles are “2.5 inch steel axles”. www.pitsco.com/Shop/Dragsters/CO2-Powered/Steel-Axles You can use other things like wheels from discarded toys, and metal hangers cut to the right size for axles. Hope this helps,

You are right. I did not. If I had to make it again, I might include that part. You are wrapping it like you would wind a yo-yo 🪀- just don’t tie it in a knot. You want the string to come free at the end so momentum will carry the vehicle further.

Good question. Longer is better. It will go slow, but the string will pull longer and make the axle spin for a longer time.

Having a ball! But teaching during COVID-19 is really not fun!!!!

GingerbreadFam howdy back at cha’

Thanks!!! We had fun making it!

Thanks!

Appreciate it

Thanks for the visit! i really appreciate it!

Gerson Campos nope, I have a meeting. But best of luck! Do the fantastic job I know you are capable of!!!

@@MrK_Engineering Thank you Mr. K!

Don't be LATE!!!!!!

wE aRE kOlKhORSt

@@MrK_Engineering I won't be late Mr. K

Yep, I know. 👍

And I also hope you do well on your project!

Vision 21st that’s Mr. K. to you,sir. 🤪

Anguelica Aguilar The metal bars are made from coat hangers. I used a wire cutter (pliers) to cut the correct length. On the video they are measured in inches. You should make it the length you want it to be. The longer the arm, the longer the pull - the shorter the arm, the faster the pull. Hope this helps!

Sergio Reynoso I hope it works for you as well! Please you let me know how it goes! Good luck!

IrregularAurora good luck!!!

If the mousetrap is further away from the back axle, it will be a longer, slower pull. The string will be longer, so it will wrap more times around the back axle. If the mousetrap is closer to the back axle, it will be a shorter, faster pull. The string will be shorter, and wrap fewer times around the back axle. Hope this helps!

Meason Kolkhorst thank you!

Myles what are you doing here?

Stephanie Boakye so, basically, the only real thing you need is any wheel, and any axle. I have used old toys, and removed the wheels and used wooden dowels as the axles. The key to remember is that the axle needs a straw to go around it so you can reduce friction. Good luck.

Meason Kolkhorst thank you so much

I use a metal hanger from my closet. I use a pare if pliers and cut it to the size I want. I can also use the pliers make sure it is straight (if you want it to be straight - you might ‘want’ a bend it it...). Remember that the arm is easy to replace if it does not do what you want to to....

Great question. Think about how fast a short stick would swing compared to a long stick. The longer stick will pull slow and longer, giving a longer pull on the string. The shorter string will pull faster but shorter. Will the faster car coast further? Will the slower car go further under power? The experiment is up to you, the arms are easily changed. Try some different lengths and see which one performs better. Good luck!

Chairlie has been used a whole bunch this year, and many of the kids are looking at your chair for ideas!!!!! you guys did a great job!

Meason Kolkhorst Im glad chairlie has helped many this school year..I hope they are having as much as fun doing their chair as much as I did

i know right xp