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Cable connected projectiles

Post about things you have launched or thought about launching. Also post about various materials used for building cannons. No posts about explosive projectiles!
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Unread postAuthor: jrrdw » Fri Apr 11, 2008 6:06 am

Hook your barrel elbows up with threaded unions, that way you can test different set ups. A few extra dollars may be worth the investment.
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Unread postAuthor: psycix » Fri Apr 11, 2008 6:26 am

judgment_arms wrote:I suggest porting one barrel slightly so that one end of the projectile moves faster than the other and sets it spinning like one would if you were to throw it.


I bet they will spin anyways due to inconsistencies.
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Unread postAuthor: rcman50166 » Fri Apr 11, 2008 9:12 am

Well I've thought about this question for sometime and figured that you need to find an estimate for effective range. Such an ammo type should not be long range. If you change the cable to a high strength elasic you can increase its effective range. (maximum working distance-minimum working distance) This is because it would increase the time required to change the direction of the weights in flight which, in return, causes the tie between them to stay taught for a longer time. The angle is still dependent upon the minimum working distance. Calculating that is a matter simple geometry.
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Unread postAuthor: pat123 » Fri Apr 11, 2008 9:21 am

I would think parallel far apart barrels. if you angle them apart they will go apart and get pulled back together I think. You just have to try it and find out.
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Unread postAuthor: biggsauce » Fri Apr 11, 2008 10:44 am

Yeah I agree with pat123. Thats probably the best bet for keeping them spaced out properly. Then theres the problem of the long cable nneded for this. Well as others have said, trial and error is the best design tool
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Unread postAuthor: rcman50166 » Fri Apr 11, 2008 11:29 am

Actually air resistance on the wire will cause the two weights to be forced together. The tesion force could actually comparitvaly significance according to some of the basic laws of simple harmonic motion. I would recommend the two barrels to be splayed about 2 degrees from eachother, just to overcome that force. Also you will need to tighten the slack required to put the two weights down the barrel. A slight outward angle may compensate for that too.
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Unread postAuthor: pizlo » Fri Apr 11, 2008 2:55 pm

starman wrote:Man, that's downright medieval... :)
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