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by MTV<=>Operator
October 17th, 2019, 5:12 pm
Forum: Gravity Vehicle C
Topic: Ramp Creation
Replies: 3
Views: 91

Re: Ramp Creation

I was having trouble designing my ramp and I was wondering what types of methods you used on the production in you ramp, and I noticed that trying to make a very steep curve the wood would easily snap. So what would be the beneficial method for allowing you ramp material to bend, in this case, much...
by MTV<=>Operator
October 14th, 2019, 8:57 am
Forum: Gravity Vehicle C
Topic: Triggering the Vehicle
Replies: 1
Views: 110

Re: Triggering the Vehicle

What should I use to trigger the gravity vehicle?
I was thinking of using some sort of hook or claw mechanism that attaches to a loop on the back of the vehicle. It would be released by pushing the hook out of the loop or opening the claw with the pencil.
by MTV<=>Operator
October 14th, 2019, 8:55 am
Forum: Gravity Vehicle C
Topic: Wheels
Replies: 12
Views: 578

Re: Wheels

I have a question about Banebots as well. I plan on using 1/4" shafts, but Banebots only sells hubs that accommodate shafts up to 6 mm. On their website, it says that the 6 mm hubs can be modified for 1/4" shafts. Does anyone know how this would be done?
by MTV<=>Operator
September 29th, 2019, 11:12 am
Forum: Gravity Vehicle C
Topic: Wheels
Replies: 12
Views: 578

Re: Wheels

Just a clarification: Would smaller wheels would be preferable to larger wheels in this event? They have less rotational inertia and a higher potential for accuracy, so I would think they would be better, but I don't know if I left out any other factors.
by MTV<=>Operator
September 28th, 2019, 6:41 pm
Forum: Gravity Vehicle C
Topic: Gravity Vehicle C
Replies: 122
Views: 5591

Re: Gravity Vehicle C

Can someone give me some guidance over the making of the ramp? What materials should I use, where can I get them, anything I should watch for etc. Also, what do you do to make a seamless transition from the ramp to the floor? (so the vehicle exits the ramp smoothly). Thanks in advance! To get the m...
by MTV<=>Operator
September 23rd, 2019, 6:48 pm
Forum: Gravity Vehicle C
Topic: Gravity Vehicle C
Replies: 122
Views: 5591

Re: Gravity Vehicle C

Hi! I'm new to this event so I have a few questions. 1. Is the brachistochrone curve even needed anymore? Someone mentioned this, but the time doesn't include going down the ramp so I'm not sure if there is really a benefit then. 2. What is the wingnut spring system mentioned in the forum? Is there...
by MTV<=>Operator
September 23rd, 2019, 3:22 pm
Forum: Gravity Vehicle C
Topic: Gravity Vehicle C
Replies: 122
Views: 5591

Re: Gravity Vehicle C

Ok, that makes much more sense. But the way I've been attaching bearings and metal spacers into the chassis is by forcing it into the wood and 3d printed chassis. This year aluminum chassis is basically a must because of the increased forces but how would you attach it into the chassis. All I've th...
by MTV<=>Operator
September 21st, 2019, 7:53 pm
Forum: Gravity Vehicle C
Topic: Gravity Vehicle C
Replies: 122
Views: 5591

Re: Gravity Vehicle C

Got it that makes much more sense. But would this eliminate the need for nuts to tighten the rod against the interference fit or the bearing? Correct nuts would not be "needed", but I would probably still recommend lock nuts to ensure there is no slippage. You dont want to tighten nuts against the ...
by MTV<=>Operator
September 20th, 2019, 3:22 pm
Forum: Gravity Vehicle C
Topic: Gravity Vehicle C
Replies: 122
Views: 5591

Re: Gravity Vehicle C

what would be the advantage of adjustable height? In my opinion, there is none. I don't think there is any use for that this year. Lowering the height would only cause the vehicle to lose energy. I have a few questions of my own about materials: 1) Does anyone happen know how strong 1 cm by 1 cm ex...
by MTV<=>Operator
September 19th, 2019, 8:14 pm
Forum: Gravity Vehicle C
Topic: Gravity Vehicle C
Replies: 122
Views: 5591

Re: Gravity Vehicle C

One thing that I've never figured out in my time in vehicle events such as mousetrap vehicle and scrambler was (a) How do high skill competitors get threaded rods into ball bearings such that there is no play between the rod and the bearings, (b) it seems that an adjustable start height for the veh...

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