Rubber Band Powered Car 4 toothpicks 2 Straws 4 Bottle Caps

Riley Elwood asked "can you make a rubber band powered car out of 4 toothpicks 2 straws and 4 bottle caps". The video is virtually real time with no fast forward sections so the total build time was only about 15 minutes. I have a separate channel focused on rubber band power - Put a rubber band on it https://bit.ly/2T3OF4j The back toothpick simply has a very short piece of toothpick glued to it so it forms a hook to hold the band as you turn the axle. Measurements: How long is your straw? You need holes for the axles to go through, they need to be the same position on both straws or the car will not go straight. You need holes in both straws for the cross-members to go through, they need to be the same position on both straws or the car chassis will not be straight. Other than that you can put the holes anywhere you like on the straws. Probably as near to the end of the straw as you dare without weakening the straw. If you watch the video carefully you can see I am using a ruler that is marked in centimetres and it looks like I am probably marking the holes about one centimetre from the end and then the next hole about one centimetre from that. Making the holes might be an issue. Melting the plastic is better than trying to drill it or push a sharp spike through but it can be done. Using a hot wire or soldering iron may be a safety problem but you get a stronger hole. In the straws it is important that the holes for the cross members are a tight fit and the holes for the axles are very loose. The holes in the wheels need to be a very tight fit. "Does adding the clay make the car move further? If so, what is the science behind it?" The answer was already explained in the video. The car was too light so the wheels lacked grip and slipped on the floor, spinning round without moving forwards. Adding the clay to the wheels made them heavier so they had more grip, stopping them slipping, so they could drive the car forwards. The science is about friction. Main components 4 toothpicks 2 drinking straws 4 bottle caps rubber bands or loom bands hot glue Modelling Clay for extra weight Main Tools Bradawl Hot Glue Gun - If you get the relevant holes nice and tight you don't need hot glue but I like to use it. Soldering iron - At 03:45 I explain I am using my soldering iron to melt the holes. You could just use a sharp nail or a drill but using the soldering iron means there is no chance of the plastic splitting, you need a steady hand to do it. Snowman plays247 asked "What other types of materials can you use other than straws?". I have split the reply video over 4 episodes and placed it in it's own playlist. /playlist/PLA5a2xPRSrB0F2PNcApzXxp_nFkUjnCMt Some helpfiles Rubber Band Car Hints and Tips /watch/oCn7yBrM6wcM7 Connecting rubber bands /watch/sbnkwdhuYbEuk Connecting the band to the axle /watch/QJFUolxYPw0YU Making the CD wheels /watch/MrmfWuBjrRZjf CD Wheels with Cardboard Hubs /watch/ETGI2ntr1sJrI Putting rubber tyres on CDs /watch/sxbCevnPunZPC I recommend this alternative design - Rubber Band Powered Car 1 x size 64 /watch/0SA7bT0LOBUu_fK8XiR5g3BrSRPx2a5ALP=tsil?cO4XHiF3OIp37 Related playlist Drinking Straw Cars /playlist/PL2Aly02Ujr7eup8mIHz7Td8FRkHuyPq7o Rubber Band Power Cars /playlist/PLA5a2xPRSrB3g5RiX8Kf_uUBOL0Tb7AS0 Rubber Band Power playlist /playlist/PLA5a2xPRSrB1otXh0w36OwsYIHZznUWp6 Brakes on Rubber Band Cars playlist /playlist/PLA5a2xPRSrB3MyidvKMT3DqU1vNy9Atsf Carrying Dropping Pushing Pulling Stopping playlist /playlist/PLA5a2xPRSrB04L6RpUAs5akmK3jqmahPL Rubber Band Wikipedia https://en.wikipedia.org/wiki/Rubber_band Size 64 rubber band measure 3 1/2"x 1/4"x 1/32" or 89mm x 6mm My Channels GrandadIsAnOldMan https://bit.ly/2T3x6RX GrandadsOtherChannel https://bit.ly/2yW5uYb Put a rubber band on it https://bit.ly/2T3OF4j Number4 https://bit.ly/3cG4fuZ You can help keep my channel running with coffee and cakes at Patreon https://bit.ly/35XFasL If you don't like Patreon you use Kofi instead https://bit.ly/3dNusI9 Merchandise on RedBubble https://rdbl.co/2yJv56H Merchandise on Cotton Cart https://bit.ly/2xZymOP Merchandise on Teespring https://bit.ly/2Zby02T Twitter https://bit.ly/3fMUgFN FaceBook https://bit.ly/3csbruk Pinterest https://bit.ly/2WTuuXP Instagram https://bit.ly/2WPLa2F Thingiverse https://bit.ly/35WfSem Tinkercad https://bit.ly/2WUrM4q Oldest videos https://bit.ly/2Z4RBl1 Most Popular https://bit.ly/3cx0lUP Newest videos https://bit.ly/2T3TryJ Playlists https://bit.ly/3dI9mdV I have thousands of videos on YouTube, to find one try my search guides /watch/wgcHOoOSBecSH or /watch/kRYwkwgU4jZUw #GrandadIsAnOldMan #GrandadsOtherChannel #Putarubberbandonit #Number4

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