C.G. From base, C.P. From base

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  • Last Post 12 July 2021
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Wm Cook posted this 04 July 2021

Have there been any assumptions or conclusions drawn from the effect C.G. from base and C.P. from base have on stability/accuracy beyond the stability factor of twist rate (bullet length, velocity and to a degree weight brings)?

I believe NOE uses the TMT software and they show it on their drawings.

And if anyone has a link they could share on the subject of C.G, C.P I would appreciate it.

Patience isn’t a virtue, it’s a delay tactic.

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Ed Harris posted this 10 July 2021

A good exercise in aerodynamics and engineering mechanics:

https://mathalino.com/reviewer/engineering-mechanics/moment-inertia-and-radius-gyration

https://apps.dtic.mil/sti/pdfs/ADA494194.pdf

https://www.researchgate.net/publication/292540763_Equations_of_motion_of_a_spin-stabilized_projectile_for_flight_stability_testing

 

73 de KE4SKY In Home Mix We Trust From the Home of Ed's Red in "Almost Heaven" West Virginia

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Wm Cook posted this 10 July 2021

Thanks for the path forward Ed. And I’m still looking for that round nose duplication of the 7.62 NEI 52A. Bill.

Patience isn’t a virtue, it’s a delay tactic.

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Wm Cook posted this 11 July 2021

Fascinating to see the difference between Center of Gravity and Center of Pressure.

Patience isn’t a virtue, it’s a delay tactic.

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Wm Cook posted this 11 July 2021

Has anyone ever seen a ballistic study from the military for small arm projectiles?

Patience isn’t a virtue, it’s a delay tactic.

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Ed Harris posted this 12 July 2021

Yes: BRL Report 1630, Aerodynamic Data for Small Caliber Projectiles to Cal. .50 by Dr. Robert L.McCoy

https://www.scribd.com/document/449334549/Robert-L-McCoy-Modern-Exterior-Ballistics-Schiffer-Publishing-Ltd-2012-pdf

https://archive.org/details/ModernExteriorBallisticsTheLaunchAndFlightDynamicsOfSymmetricProjectiles2ndEd.R.McCoy

https://docplayer.net/48132084-To-approved-for-public-release-distribution-unlimited.html

 

73 de KE4SKY In Home Mix We Trust From the Home of Ed's Red in "Almost Heaven" West Virginia

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