Building Materials

Kylari04
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Building Materials

Postby Kylari04 » July 9th, 2018, 5:19 pm

What have you guys been using for building materials, or what do you think works best? Also, how are you transporting your roller coasters to competitions (especially since they are so big)?
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shrewdPanther46
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Re: Building Materials

Postby shrewdPanther46 » July 10th, 2018, 4:43 pm

Kylari04 wrote:What have you guys been using for building materials, or what do you think works best? Also, how are you transporting your roller coasters to competitions (especially since they are so big)?

Make it so u can consistently take it apart and put it back together. Then its easy to pack.
salty

retired1
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Re: Building Materials

Postby retired1 » July 10th, 2018, 6:10 pm

If you start early, make the walls of the first one out of heavy cardboard and duct tape. Glued triangle braces makes it fairly strong. That makes it easy to mount stuff and to make easy (cheap) changes. This allows you to make bigger jumps and/or reduce sizes.

Kylari04
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Re: Building Materials

Postby Kylari04 » July 10th, 2018, 10:58 pm

Ah, these things make sense. What about the track itself? What kind of material would you recommend? In my state, it rains a lot, so one of my concerns is making a relatively easy track that can resist the rain.
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retired1
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Re: Building Materials

Postby retired1 » July 11th, 2018, 4:46 pm

I have never coached this event, so I do not speak with great authority.
My personal thought for it this year was a perfectly round marble or ball bearing. For this I would have used 1/2" PVC pipe split the long way. With just the right amount of heat, it can be gently bent. A large hair dryer might work. I have an industrial size one, so I might be biased. Actually, boiling water might be able to be used with the proper jigs and safety equipment. If the ball was rolling fast enough It could be bent on a generous radius to at least 90 degrees. This would be slightly banked like some road curves are. You could use sweeps for the curve but it will use up a lot of space. It would need to be split the long way.
PVC pipe is nice to use as you can take a 10' section and run the marble thru it with different slopes to get a good idea of how much ril it will take to get certain times. Adjustable slopes on your final product can go a long way to having very good times for the run.
Hard wood with a very generous "V" slot cut into it with a table saw or preferably a router is an option.
If you used wire, it would require good "railroad ties". It would need to be quite stiff so that it did not accidentally get bent. You might be able to use 1/4 copper tube. Metal rails would really need to use a proper bender on it. I have a very old one that is now rather expensive that makes nearly perfect bends. There are cheap to moderately expensive hand bending tools. Look at copper tube bending tools. The ones that look like a coiled spring that fit over the outside of the tube are rather cheap, but there might be a nasty learning curve.
Strips of 1/4" PVC could be screwed/glued to a wood base of a proper width for you ball. You would probably have to glue PVC side boards that go about ball height above the "rail" that it runs on to avoid "OOPS"
Another option would be the blue "smurf" plastic electrical conduit This can be readily hand bent. You might want to glue it to some 1/4" sheet PVC pieces to maintain curves or as mounting brackets.

There is no best option! It is what ever you can get comfortable with. Start practicing early on what will become scrap material.

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Re: Building Materials

Postby IvanGe » September 2nd, 2018, 2:21 pm

I would honestly say with any type of tracks you will always have to cover it up or build a box to put it in. Rain will decrease the consistency by a lot and from personal experience, even dust will affect it. Your best bet will be probably building some sort of container( cardboard, plastic, wood, etc.) to keep it safe.
2017 Hovercraft Division B : 1/1/1/3/3
18-19 Events(Probs) : Anatomy & Phys, EL Glider, Fossils, Dynamic Planet, Battery Buggy
National Tournament at Wright State 2017 : Third Place @ Hovercraft
National Tournament at Colorado State 2018 : Seventh Place @ Roller coaster (DEPRESSION)


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