Kiwi Airgunners Forum : The reason for ridges on a pellet skirt. www.kiwiairgunners.co.nz/ This is an XML content feed of; Kiwi Airgunners Forum : Flub's General Discussion : The reason for ridges on a pellet skirt. Copyright (c) 2006-2012 Web Wiz Forums - All Rights Reserved. Mon, 18 May 2026 14:26:47 +0000 Fri, 19 May 2017 09:59:19 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 10.14 360 www.kiwiairgunners.co.nz/RSS_post_feed.asp?TID=343 Kiwi Airgunners Forum www.kiwiairgunners.co.nz/forum_images/logo.jpg www.kiwiairgunners.co.nz/ The reason for ridges on a pellet skirt. : I hadn't read your last post... www.kiwiairgunners.co.nz/forum_posts.asp?TID=343&PID=2032#2032 Author: xyon
Subject: 343
Posted: 19 May 2017 at 9:59am

I hadn't read your last post before I wrote mine. Yep spot on, a side wind will cause an elevation change, how much I have no idea.

I would have guessed ridges on a pellet would make the effect more pronounced, as that is why golf balls are dimpled and not smooth ??

I have wondered why some pellets have ridges, but since most of the good ones don't seem to I haven't bothered trying to find out.

]]> Fri, 19 May 2017 09:59:19 +0000 www.kiwiairgunners.co.nz/forum_posts.asp?TID=343&PID=2032#2032 The reason for ridges on a pellet skirt. : If I understand you right, there... www.kiwiairgunners.co.nz/forum_posts.asp?TID=343&PID=2031#2031 Author: Pauly5
Subject: 343
Posted: 19 May 2017 at 6:22am

If I understand you right, there will be no effect unless there is a wind acting from the side. So really no impact until there is wind.]]> Fri, 19 May 2017 06:22:14 +0000 www.kiwiairgunners.co.nz/forum_posts.asp?TID=343&PID=2031#2031 The reason for ridges on a pellet skirt. : I'm pretty sure this statement... www.kiwiairgunners.co.nz/forum_posts.asp?TID=343&PID=2030#2030 Author: xyon
Subject: 343
Posted: 19 May 2017 at 6:08am

I'm pretty sure this statement is wrong.
"In brief this means that the spinning of the pellet as it travels produces a low pressure area to the side of the pellet into which it is sucked. That gives a pellet deviation to the side of the direct line from muzzle to target. Left to a clockwise rotating pellet. "

There is no difference between the left or right side (or top and bottom for that matter) when the pellet is rotating.
The magnus effect will change the flight path when the axis of rotation not in the same direction as the air flow over the projectile (eg a crosswind).  See http://en.wikipedia.org/wiki/External_ballistics#Magnus_effect

]]> Fri, 19 May 2017 06:08:06 +0000 www.kiwiairgunners.co.nz/forum_posts.asp?TID=343&PID=2030#2030 The reason for ridges on a pellet skirt. : I did. Very interesting. So a... www.kiwiairgunners.co.nz/forum_posts.asp?TID=343&PID=2005#2005 Author: Pauly5
Subject: 343
Posted: 17 May 2017 at 1:43pm

I did. Very interesting. So a pellet would either go up or down if there is a side wind. It would need a vertical wind to move sideways. Have I got that right?
So in theory in a certain side wind, your pellet may not drop as much as you would expect. As nova said probably nothing noticeable but all the same interesting.]]> Wed, 17 May 2017 13:43:31 +0000 www.kiwiairgunners.co.nz/forum_posts.asp?TID=343&PID=2005#2005 The reason for ridges on a pellet skirt. : yer need to google "flettener... www.kiwiairgunners.co.nz/forum_posts.asp?TID=343&PID=2004#2004 Author: pete
Subject: 343
Posted: 17 May 2017 at 1:30pm

yer need to google "flettener rotor"
Mr Flettener built a ship that used the magnus effect to power it..

.
]]> Wed, 17 May 2017 13:30:58 +0000 www.kiwiairgunners.co.nz/forum_posts.asp?TID=343&PID=2004#2004 The reason for ridges on a pellet skirt. : Paul is right about the cricket... www.kiwiairgunners.co.nz/forum_posts.asp?TID=343&PID=2003#2003 Author: nunga
Subject: 343
Posted: 17 May 2017 at 6:14am

Paul is right about the cricket ball, thats why they shine only one side of the seam to get the ball to swing through the air when bowling. the seam of the cricket ball normally stays straight up and down when bowling
]]> Wed, 17 May 2017 06:14:49 +0000 www.kiwiairgunners.co.nz/forum_posts.asp?TID=343&PID=2003#2003 The reason for ridges on a pellet skirt. : Yes but it also has seams which... www.kiwiairgunners.co.nz/forum_posts.asp?TID=343&PID=2002#2002 Author: Novagun
Subject: 343
Posted: 17 May 2017 at 4:07am


Yes but it also has seams which must shift air around its surface. And tennis balls, they both get lobed with spin.
]]> Wed, 17 May 2017 04:07:26 +0000 www.kiwiairgunners.co.nz/forum_posts.asp?TID=343&PID=2002#2002 The reason for ridges on a pellet skirt. : But what if you're OCD?... www.kiwiairgunners.co.nz/forum_posts.asp?TID=343&PID=2001#2001 Author: Pauly5
Subject: 343
Posted: 17 May 2017 at 2:00am

But what if you're OCD? Is that one hole group exactly where you aimed?
I would say the cricket ball moves because of drag on one side and shiny the other.]]> Wed, 17 May 2017 02:00:52 +0000 www.kiwiairgunners.co.nz/forum_posts.asp?TID=343&PID=2001#2001 The reason for ridges on a pellet skirt. : How far off does it move the pellet.... www.kiwiairgunners.co.nz/forum_posts.asp?TID=343&PID=2000#2000 Author: Novagun
Subject: 343
Posted: 16 May 2017 at 3:15pm

How far off does it move the pellet. Who knows, who cares but it is definitely there. If you put the pellet in the pigeons  head that is good.
In my case all my five shot one hole groups are just as good.
]]> Tue, 16 May 2017 15:15:37 +0000 www.kiwiairgunners.co.nz/forum_posts.asp?TID=343&PID=2000#2000 The reason for ridges on a pellet skirt. : I don't think calibre matters... www.kiwiairgunners.co.nz/forum_posts.asp?TID=343&PID=1999#1999 Author: Novagun
Subject: 343
Posted: 16 May 2017 at 3:10pm

I don't think calibre matters nor does velocity at least at small speeds.
The magnus effect is used markedly on cricket balls, golf balls, basket balls which are all slow moving.
With rifle bullets I think high power overcomes many occurences because bullets go really fast.
]]> Tue, 16 May 2017 15:10:52 +0000 www.kiwiairgunners.co.nz/forum_posts.asp?TID=343&PID=1999#1999