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Very tip-weight sling projectiles (Read 1433 times)

timpa Interfector Viris Spurii Offline Stones in the horizon Posts: 1515 Finland	Very tip-weight sling projectiles Nov 23^rd, 2018 at 1:02pm I have this kind of souvenir from British holiday. It's a pen that always stands upright. I wonder if that would be a good sling projectile? The test result is displayed in the video: https://www.youtube.com/watch?v=ELoo4HXbsYw
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Bill Skinner past-moderator Offline Slinging Rocks! Posts: 3292	Re: Very tip-weight sling projectiles Reply #1 - Nov 24^th, 2018 at 9:41am How about a streamer or tail, like on a kite, to make them fly straight?
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Sarosh Interfector Viris Spurii Offline Posts: 1140	Re: Very tip-weight sling projectiles Reply #2 - Nov 24^th, 2018 at 11:02am the shape and mass placement of the pen is optimal for subsonic speeds. now how to put it in a pouch and sling it with a good spiral is another story...
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timpa Interfector Viris Spurii Offline Stones in the horizon Posts: 1515 Finland	Re: Very tip-weight sling projectiles Reply #3 - Nov 24^th, 2018 at 12:42pm It requires a larger tail. And such a sling. This shaft, I threw a trough the roofing sheet (hole in the picture)
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Drakolith Funditor Offline Posts: 675 U.S.	Re: Very tip-weight sling projectiles Reply #4 - Nov 26^th, 2018 at 9:58am An interesting concept. Another thing that would be interesting to see would be if one could apply the magnus effect to slinging. Thought I have a vague memory of you doing that before, but I have a terrible memory.
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timpa Interfector Viris Spurii Offline Stones in the horizon Posts: 1515 Finland	Re: Very tip-weight sling projectiles Reply #5 - Nov 26^th, 2018 at 6:41pm For pirouette style, the Magnus effect is clearly visible. The stone is dive fast or glide too far. But I have never made a video.
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Drakolith Funditor Offline Posts: 675 U.S.	Re: Very tip-weight sling projectiles Reply #6 - Nov 28^th, 2018 at 11:08am I didn’t know that, that’s interesting. But I was thinking it would be interesting to make some sort of ammo to use the effect to its fullest and see if it is benifical for slinging at all. Or if it’s just fun to do.
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Sarosh

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Re: Very tip-weight sling projectiles
Reply #7 - Nov 28^th, 2018 at 11:40am

Drakolith wrote on Nov 28^th, 2018 at 11:08am:

But I was thinking it would be interesting to make some sort of ammo to use the effect to its fullest and see if it is benifical for slinging at all.

https://www.youtube.com/watch?v=mXhLdz-Qmsk
watch from 5:30
the problem is that he uses tennis balls
he achieved 86m w/ backspin .
if i remember correct i can throw a tennis ball 50m by hand, 70m with sling, spiral and backspin dont differ too much.
tennis balls aren't a good way to get results with backspin . probably the surface material is the problem not the density.

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