Projectile

Patent metadata

Field	Value
Publication number	US-2016202030-A1
Application number	US-201514970956-A
Country	US
Kind code	A1
Filing date	Dec 16, 2015
Priority date	Jan 8, 2015
Publication date	Jul 14, 2016
Grant date	—

Abstract

The present invention provides a projectile for use in a simulated fan-blade-off ballistic test. The projectile has an ellipsoid body having a blind axial bore extending from a first axial end. The blind axial bore is for housing a weight adjustment body which can be used to modify the weight and/or centre of gravity of the projectile. A sealing plug may seal the weight adjustment body within the axial bore and an insert may be provided to fix the position of the weight adjustment body and/or to control the sliding of the weight adjustment body within the axial bore.

First claim

1 . A projectile for use in a simulated fan-blade-off ballistic test, wherein the projectile has an ellipsoid body having a blind axial bore extending from a first axial end, the blind axial bore for housing a weight adjustment body.

2 . A projectile according to claim 1 further comprising at least one weight adjustment body within the axial bore.

3 . A projectile according to claim 2 wherein the at least one weight adjustment body is slidable within the axial bore.

4 . A projectile according to claim 2 wherein the projectile further includes at least one insert housed within the axial bore between the blind end of the axial bore and the weight adjustment body.

5 . A projectile according to claim 4 wherein the at least one insert is at least partly formed of or comprises a deformable material or a deformable device.

6 . A projectile according to claim 4 wherein the insert is a high friction device.

7 . A projectile according to claim 6 wherein the high friction device is slidable within the axial bore.

8 . A projectile according to claim 1 further comprising a sealing plug for sealing the axial bore.

9 . A projectile according to claim 1 wherein the ellipsoid body is formed of aluminium or an aluminium alloy.

10 . A kit for use in a simulated fan-blade-off ballistic test, the kit comprising:
a projectile according to claim 1 ; at least one weight adjustment body; and a plug for sealing the blind bore at the first axial end.

11 . Kit according to claim 10 comprising a plurality of weight adjustment bodies of differing masses.

12 . Kit according to claim 10 comprising at least one insert for insertion into the axial bore between the blind end of the axial bore and the weight adjustment body.

13 . Kit according to claim 12 comprising a plurality of inserts of differing axial lengths and/or differing deformation properties and/or differing frictional resistance properties.

14 . A simulated fan-blade-off ballistic test method comprising:
firing a projectile according to claim 1 towards a test item to be impacted; and assessing damage to the test item after impact of the projectile.

Assignees

• Rolls Royce Plc

Inventors

• Williams Christopher
• Finlayson James

Classifications

• F42B30/00

  Projectiles or missiles, not otherwise provided for, characterised by the ammunition class or type, e.g. by the launching apparatus or weapon used (F42B10/00, F42B12/00, F42B14/00 take precedence) · CPC title

• G01N3/30

  by applying a single impulsive force, e.g. by falling weight · CPC title

• F42B12/02 Primary

  characterised by the warhead or the intended effect · CPC title

• F42B8/12 Primary

  Projectiles or missiles (F42B10/48, F42B12/36, F42B19/36 take precedence) · CPC title