Actually Chris it will be a type of medical device to help a wheel chaired person go down the stairs in an emergency situation. We are using a track system to enable the user to do so. We are not actually building an RC tank. I am sorry if this forum is only for rc tanks, but I did legitimately have questions on how you guys go about choosing your type of track system. I am so glad to hear that you were able to deduce the purpose of our project from such a poor description. This means our even more detailed report would allow others to imagine a more vivid image of the project.
Here is the low down on our project. We are building an attachment to a wheelchair to help the wheelchair population travel down stairs during emergency situations by themselves. All products today require the assistance of others during emergencies and we wanted to make wheelchair users more independent. So the track system will be engaged with the large wheels of wheelchair by way for chain and sprocket. So as the user drives with the big wheels the tank tracks should move with them also. We are including a sort of bike gear system to chain and sprocket so the wheels can be easier to turn or harder to turn depending on the speed the user wants to go. But we had limited the max speed to 5mph for safety reasons. Our wheelchair does not need to go up the stairs yet, we want to deal with going down first. Maybe after securing that function we can incorporate a motor to help user go up also. A normal wheelchair has max weight of 250lbs and wheelchair has a weight of approximately 50lbs with the footrests. So in turn the tracks will need to hold about 300lbs. If we are able to build a working project. I would gladly share the images and designs with you. In addition also mention you as an advisor in our presentation. The reason we wanted tracks is because we desired as much possible surface area with the ground as possible during descent in order to stop slipping or tipping over of user. The best way my group believed for this to happen was a track system. I am in charge of finding a suitable track system for our project. I came across your website and was hoping to get some tips and opinions on the type of track we should use. We planned on using the ones made by the rc robot war websites, but found out they were too expensive and pushed us to find a more cost-effective solution. The tracks will be inside the wheelchair frame. Which is roughly 23 inches from the back of the wheelchair to the front. Then 17 inches from large wheel to large wheel. We were hoping to use sprockets of 2-3 inch diameter as we have only 18 inches from bottom of seat to floor with a crossbar being in the middle. On Monday, April 21, 2014 2:21:27 PM UTC-7, odyssey...@aol.com wrote: > > just thought of something else, i take it you all ready have some sort > of hull in mind or designed for this vehicle. it might ideal to find a > piece of cardboard, draw out the hull (at least maybe the first foot of > it), do some cut outs of road wheels and idler/sprocket wheel and tack them > to it. then if possible, take a piece of string/twine/rope and run it > around the those few wheels, then take it to the bottom of the steps and > see how it's going to make contact. this might explain what i was just > thinking in that last email as to how your vehicle's tracks will make > contact and possible give rather than trying to start climbing and possibly > avert any problems in the design later. > > chris > -- -- You are currently subscribed to the "R/C Tank Combat" group. To post a message, send email to rctankcombat@googlegroups.com To unsubscribe, send email to rctankcombat+unsubscr...@googlegroups.com Visit the group at http://groups.google.com/group/rctankcombat --- You received this message because you are subscribed to the Google Groups "R/C Tank Combat" group. To unsubscribe from this group and stop receiving emails from it, send an email to rctankcombat+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
