Resettable Launch
#1
Posted 25 May 2009 - 11:07 PM
-Rct2123:cool:
#2
Posted 25 May 2009 - 11:51 PM
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#3
Posted 26 May 2009 - 12:12 AM
-Rct2123:cool:
#4
Posted 26 May 2009 - 12:43 AM
In that case, a drill launch would be the way to go. It would be difficult to get to 7 feet though, so maybe a more powerful motor could be used.
The problem with using Jesper's launch in this case would be resetting the rubber bands. From my past experiments, the amount of torque needed to pull back a rubber band is too great for Knex motors, requiring a heavily down-geared drill at the very least. You would have better luck with surgical tubing if you want it to reset.
No need to consider a weight-drop launch. I used up to 16 pounds dropped from 6 feet and couldn't get a launch higher than 4 greys. It was just too inefficient.
#5
Posted 26 May 2009 - 08:28 AM
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#6
Posted 26 May 2009 - 04:03 PM
Pressurized Hydrogen released to spin a turbine attached to a cord attached to the car?
Using the positive and negative sides of a magnet to create extreme movement?
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Intimidator305, El Toro, Maverick, Harry Potter and the Forbidden Journey, Top Thrill Dragster
#7
Posted 26 May 2009 - 07:41 PM
^The first would have too many problems.
Second option -- why hydrogen, one of the most flammable gases known? You could just used compressed air to get the same result. In fact, hydrogen may be one of the worst choices compressed, it's the lightest element.
The 3rd option you said was an LSM launch.
These are used on anything from Maglev trains, or various coasters.
The problem with these is that such specific measurements, a great understanding of calculus, and an amazing mechanical mind to put the whole thing together are needed.
Say, if you even wanted to put a few people on the trains, the whole project could come to a halt.
EDIT:
Possibly, with the use of transistors, diodes, and all the calculations you need you can make this off the shelf, but never with just K'nex pieces and magnets and K'nex motors. Electricity is needed, simple as that. This won't be done by any group of teens anytime soon.
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#8
Posted 26 May 2009 - 07:53 PM
#9
Posted 26 May 2009 - 08:36 PM
As far as I can remember that's how TTD and KingDa Ka work.Second option -- why hydrogen, one of the most flammable gases known? You could just used compressed air to get the same result. In fact, hydrogen may be one of the worst choices compressed, it's the lightest element.
I think the calculations could be done to make a LSM launch work.
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Intimidator305, El Toro, Maverick, Harry Potter and the Forbidden Journey, Top Thrill Dragster
#10
Posted 27 May 2009 - 05:47 AM
What we need to do if find a way to take stored energy, and release it efficiently. Stored energy is anything from picking up a book, or pulling back a rubber band.
Or we could be creative, and find a way to reset a normal rubber band launch.
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#11
Posted 27 May 2009 - 02:01 PM
-Rct2123:cool:
#12
Posted 27 May 2009 - 02:42 PM
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#13
Posted 27 May 2009 - 07:20 PM
Comment on that please...
-Rct2123:cool:
#14
Posted 27 May 2009 - 07:30 PM
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<---If only...
#15
Posted 27 May 2009 - 09:05 PM
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Intimidator305, El Toro, Maverick, Harry Potter and the Forbidden Journey, Top Thrill Dragster
#16
Posted 28 May 2009 - 05:49 AM
Like I said, a launch with compressed air(pneumatics) or hydraulics sound the best.
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#17
Posted 28 May 2009 - 03:25 PM
Really your giving me nothing here. I need sketches, and detailed explanations. We also are not going to discuss this with Steelway. They are the opposing company remember?...
-Rct2123:cool:
#18
Posted 28 May 2009 - 06:57 PM
The compressed air is released and turns the paddle wheel which turns the rod that turns the gear that turns the gear that turns the rod that turns the set of gears that pulls the chain which launches the car.
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Intimidator305, El Toro, Maverick, Harry Potter and the Forbidden Journey, Top Thrill Dragster
#19
Posted 28 May 2009 - 07:53 PM
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#20
Posted 28 May 2009 - 08:25 PM
^^That isn't a bad idea, I wonder if it would produce enough power though. I would need extremely efficient parts to make it work. Also I would need an air compressor. Compressor and such would be easy, but I would need to super compress it, and release it extremely fast...
I am definitely willing to put some money into this...
-Rct2123:cool: