Hi Grandad! I wanted to let you know that your series on gravity powered cars helped me on a high school project 6 years ago. I didn’t know what one looked like or how it worked. Thank you so much for making these videos :)
That is awesome! thank you so much for the positive feedback. You must have left school by now and probably got a job, or gone on to university. Good luck, with whatever you are doing 😊👍
I feel honored sir! Thanks for taking the time to run these experiments! I too am puzzled by the outcome. I thought sure the added mass from the weights would make the car go farther.
Hey, it was your comment that inspired me to test the options so thanks for commenting. I doubt that my results should be taken as a definitive proof, but as you see I tried it with two slightly different setups and still had the same result. Maybe the weight should be considered to work like a booster rocket that is discarded after it has served it's purpose.
better to put the weight on pendulum, with a ratchet mechanism and keep recycling the energy of your mass as it swings. in a high school distance competition, my daughters single axle vehicle with a brick as mass was stopped by the far wall of the gymnasium. we never actually found out how far it would go but it beat the competition by one and half basketball courts when it was stopped by the wall. we used a cheap bicycle freehub as the axle and ratchet and cut out wheels 36 in dia from 3/8 plywood. bicycle wheels and a good shimano free hub would be better yet.
Unfortunately no, but to help Your minds eye, the whole contraption was painted orange , wheels had cut outs and paint to resemble an orange slice. Now that I'm thinking about it we also had to coat the wheel rim with silicone to give a little traction. On the first test the torque of the pendulum overwhelmed the minute amount of friction that the plywood wheels had with the road surface. I remember my daughters science teach to be really taken aback when she showed up with it.
Excuse me sir, but may I ask which video you made the base for the car in, while working on the original rubber-band car? It would make getting the dimensions for the car much more easy. I have a project to build a gravity powered car, and if I could make a similar, smaller version to this build, then I could easily have the car built and ready to go. Thank you very much for your time, and also for the videos! It's pretty interesting to see how you make all these cars.
+TheFallenblackwolf gosh I have hundreds of videos on making rubber band powered cars and many of them are like this, just a piece of cardboard with drinking straws hot glued to each end. The first time I used this particular piece of cardboard is in this video ruclips.net/video/I2tCuuhXdqQ/видео.html
+GrandadIsAnOldMan Thank you very much! The video is a perfect guide, and I already have the materials assembled, so it should all be rather fun to get it built. I wish you a wonderful day, sir.
Hi sir im having trouble making the car come back is there any way to make the car go 5 meters and come back using a 1 kg mass at the drop height of 1 meter Thanks
If you don't need to be too accurate about the exact distance then you could use the same method that I used in this rubber band powered car. You wind your string round the back axle a certain number of turns one way, then a certain number of turns the other way so that as it unwinds the car travels forwards for a distance and then backwards for a distance ruclips.net/video/bBU8UngaFfM/видео.html
Hi! I love how you tested the two different ways so we could see the difference. I was wondering if you still remember what kind of materials you used for the gravity car? Thanks.
+Alicia Zhang The main car is one of my old rubber band powered cars. The chassis is a piece of cardboard, the axle tubes are drinking straws, the axles are bamboo cane or bbq skewers. The wheels are CDs, the hubs are bottle tops. The tower is bamboo canes, the pulley came from an old record player, a few paperclips were used and also some plastic bead for spacers. I used fishing line but string or strong cotton would do to lift the lead fishing weights. I have updated the video description with a few useful links
Actually idk if u still here but i wish you can help me, how can i be accurate about the distance i want the car to stop at exactly 3 meters pls help me
Here is my playlist for putting brakes on rubber band cars - the methods will work on gravity cars too ruclips.net/p/PLA5a2xPRSrB3MyidvKMT3DqU1vNy9Atsf
Man i really want to tell you that I appreciate your work you had helped a lot of people. I wish you healthy long life. May allah reward you with good.
Hi Landry, you would have to define efficiency. I could improve all my cars simply because you learn from experience. I try to limit myself to items I have salvaged or scavenged or bought cheap, so I could improve cars by buying the proper components like wheels or motors designed for model cars rather than using CDs and motors from vibrating toothbrushes. Even the rubber bands I use are the cheapest I can find so proper rubber designed for model aeroplanes would be better. This gravity car I have just been working with was not designed as a gravity car, I have just adapted it. If I wanted to do the same project again to test the Drop or Catch question I would make it much wider so the wheels don't run over the weight when it drops to the floor and there would be no chance of the weight hitting the chassis as it falls through. I would even change the shape of the weight.
At around 02:44 I show there is a thin peg straight through the back axle to hook the string onto the axle. You can see it again at several times through the video. The string is attached to the weights, then goes up over the pulley, then down to the back axle. It has a loop tied in the end of it, so you can just hook it over that peg and wind the string round the axle to lift the weight. A tooth pick would be the right sort of thickness, just a short bit, maybe half an inch or a centimetre long.
@@GrandadIsAnOldMan thank you so much ! i am doing a project like this but with a water bottle and wanted to figure out how to make the weight drop. thank you for getting to my comment !!!
Hi Grandad! I wanted to let you know that your series on gravity powered cars helped me on a high school project 6 years ago. I didn’t know what one looked like or how it worked. Thank you so much for making these videos :)
That is awesome! thank you so much for the positive feedback. You must have left school by now and probably got a job, or gone on to university. Good luck, with whatever you are doing 😊👍
I feel honored sir! Thanks for taking the time to run these experiments! I too am puzzled by the outcome. I thought sure the added mass from the weights would make the car go farther.
Hey, it was your comment that inspired me to test the options so thanks for commenting. I doubt that my results should be taken as a definitive proof, but as you see I tried it with two slightly different setups and still had the same result. Maybe the weight should be considered to work like a booster rocket that is discarded after it has served it's purpose.
better to put the weight on pendulum, with a ratchet mechanism and keep recycling the energy of your mass as it swings. in a high school distance competition, my daughters single axle vehicle with a brick as mass was stopped by the far wall of the gymnasium. we never actually found out how far it would go but it beat the competition by one and half basketball courts when it was stopped by the wall. we used a cheap bicycle freehub as the axle and ratchet and cut out wheels 36 in dia from 3/8 plywood. bicycle wheels and a good shimano free hub would be better yet.
Hey that sounds great, I can picture that in my mind. Did you video it running?
Unfortunately no, but to help Your minds eye, the whole contraption was painted orange , wheels had cut outs and paint to resemble an orange slice. Now that I'm thinking about it we also had to coat the wheel rim with silicone to give a little traction. On the first test the torque of the pendulum overwhelmed the minute amount of friction that the plywood wheels had with the road surface. I remember my daughters science teach to be really taken aback when she showed up with it.
I shall put this on my list (it is a very long list) I am going to keep my eyes open for scrap bicycle parts as I rather like the idea 😊
do you possibly have a picture of this ?
Excuse me sir, but may I ask which video you made the base for the car in, while working on the original rubber-band car? It would make getting the dimensions for the car much more easy. I have a project to build a gravity powered car, and if I could make a similar, smaller version to this build, then I could easily have the car built and ready to go. Thank you very much for your time, and also for the videos! It's pretty interesting to see how you make all these cars.
+TheFallenblackwolf gosh I have hundreds of videos on making rubber band powered cars and many of them are like this, just a piece of cardboard with drinking straws hot glued to each end. The first time I used this particular piece of cardboard is in this video ruclips.net/video/I2tCuuhXdqQ/видео.html
+GrandadIsAnOldMan Thank you very much! The video is a perfect guide, and I already have the materials assembled, so it should all be rather fun to get it built. I wish you a wonderful day, sir.
TheFallenblackwolf good luck :)
thanks for the great vid
Thank you, there is more information in the video description 😊
Hi sir im having trouble making the car come back is there any way to make the car go 5 meters and come back using a 1 kg mass at the drop height of 1 meter Thanks
If you don't need to be too accurate about the exact distance then you could use the same method that I used in this rubber band powered car. You wind your string round the back axle a certain number of turns one way, then a certain number of turns the other way so that as it unwinds the car travels forwards for a distance and then backwards for a distance ruclips.net/video/bBU8UngaFfM/видео.html
Hi! I love how you tested the two different ways so we could see the difference. I was wondering if you still remember what kind of materials you used for the gravity car? Thanks.
+Alicia Zhang The main car is one of my old rubber band powered cars. The chassis is a piece of cardboard, the axle tubes are drinking straws, the axles are bamboo cane or bbq skewers. The wheels are CDs, the hubs are bottle tops. The tower is bamboo canes, the pulley came from an old record player, a few paperclips were used and also some plastic bead for spacers. I used fishing line but string or strong cotton would do to lift the lead fishing weights. I have updated the video description with a few useful links
+GrandadIsAnOldMan thank you so much!
Actually idk if u still here but i wish you can help me, how can i be accurate about the distance i want the car to stop at exactly 3 meters pls help me
Here is my playlist for putting brakes on rubber band cars - the methods will work on gravity cars too ruclips.net/p/PLA5a2xPRSrB3MyidvKMT3DqU1vNy9Atsf
Man i really want to tell you that I appreciate your work you had helped a lot of people. I wish you healthy long life. May allah reward you with good.
@@xashinobicraftz5468 thank you
What do you think the most efficient type of car you have made is? Do you think you could best it
Hi Landry, you would have to define efficiency. I could improve all my cars simply because you learn from experience. I try to limit myself to items I have salvaged or scavenged or bought cheap, so I could improve cars by buying the proper components like wheels or motors designed for model cars rather than using CDs and motors from vibrating toothbrushes. Even the rubber bands I use are the cheapest I can find so proper rubber designed for model aeroplanes would be better. This gravity car I have just been working with was not designed as a gravity car, I have just adapted it. If I wanted to do the same project again to test the Drop or Catch question I would make it much wider so the wheels don't run over the weight when it drops to the floor and there would be no chance of the weight hitting the chassis as it falls through. I would even change the shape of the weight.
how does the wire attach to the back axle ?
At around 02:44 I show there is a thin peg straight through the back axle to hook the string onto the axle. You can see it again at several times through the video. The string is attached to the weights, then goes up over the pulley, then down to the back axle. It has a loop tied in the end of it, so you can just hook it over that peg and wind the string round the axle to lift the weight. A tooth pick would be the right sort of thickness, just a short bit, maybe half an inch or a centimetre long.
@@GrandadIsAnOldMan thank you so much ! i am doing a project like this but with a water bottle and wanted to figure out how to make the weight drop. thank you for getting to my comment !!!
@@brady.horton good luck 👍
Why in this case the Force is not in the direction of momentum?
Which force and which momentum. Would this be your homework question by any chance?
fun
With all my videos you can find more information in the video description 😊👍
Ok
😊
Ok boomer
👴👴👴