US2315145A - Vaned projectile - Google Patents

Vaned projectile Download PDF

Info

Publication number
US2315145A
US2315145A US286278A US28627839A US2315145A US 2315145 A US2315145 A US 2315145A US 286278 A US286278 A US 286278A US 28627839 A US28627839 A US 28627839A US 2315145 A US2315145 A US 2315145A
Authority
US
United States
Prior art keywords
tail
projectile
blades
shell
ring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US286278A
Other languages
English (en)
Inventor
Wauters Jean
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US2315145A publication Critical patent/US2315145A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • 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
    • F42B30/08—Ordnance projectiles or missiles, e.g. shells
    • F42B30/10—Mortar projectiles
    • F42B30/12—Mortar projectiles with provision for additional propulsive charges, or for varying the length

Definitions

  • the present invention relates to improvements in vaned projectiles and more especially to those intended to be fired from muzzle-loaded guns or mortars.
  • a known means of setting the centre of gravity forwards consists in arranging said tail in such a way that it may become detached from the shell when the shot is fired.
  • said improvements according to the invention apply more especially to a detachable tail vaned projectile of this nature and are remarkable, in particular, owing 'to the fact that friction means are applied to temporarily X said tail to said body up to the moment of firing.
  • said ⁇ charge-bearing tail is provided with a conical end capable of engaging with a correspondingly shaped recess provided at the rear of the body; the tail being moreover provided with a flange shaped in such a way that when the tail is rotated in its recess, increased friction is applied on the fins of the vane system so as to secure the tail on the shell until it is red.
  • This method of attachment ensures the correct release of the tail in the gun itself and its ejection immediately after the projectile has issued from the muzzle, through the action of the sudden depression which then occurs in the bore.
  • the contour of the portion of the projectile forward of the main diameter and the contour of the fuze are'of a shape such, that along a length comprised between one and a half and three times the calibre, the combination forms a concavo-convex contour in which the front concave portion and the rear convex portionmerge tangentially.
  • a further feature of the invention is that the concave-convex portion of the projectile merges directly with the rear portion of decreasing diameter and the length of the rear portion, up to the point of origin of the vanes, is between 1 and 3 calibres.
  • the length of the vanes themselves varies between three quarters of the calibre and one and a half calibres.
  • the vanes are supported by a ring secured to the base 0f the shell and provided with a conical portion into which the charge bearing tail is fitted.
  • a further feature of the invention is that the gun-powder relay which ensures the ignition of the detonator is separated from it by a thin stamped gas-check cup or sheath the edges of Which, folded back on a plastic washer, are set in a groove of the eye of the projectile.
  • Figure 1 is an axial section of a projectile embodying the improvements according to the invention
  • Figure 2 is an end view
  • Figure 3 is a view similar to that in Fig. 2 showing the appearance of the rear of the shell after the tail has been discarded;
  • Figure 4 is a plan view of an additional proy pelling charge.
  • the projectile comprises a body i to the front portion of which is fitted a fuse 2 while the rear is tted with a set or" vanes 3 solid with a ring li which is screwed ont-o a threaded teat 5 provided on the base.
  • the vane blades 3 are preferably slightly inclined with respect to the longitudinal axis of the projectile (less than 4 degrees) in order to impart to it a very slow gyratory motion along its trajectory.
  • Ring 4 is provided with a conical recess into which penetrates the correspondingly shaped end l of a charge-carrying tail B.
  • a cartridge 9, or some other propelling charge is introduced into the charge-carrying tail for the purpose of ig-A niting additional charges l of annular construction, as shown in Figure fl, through radial holes I9,v
  • a varying number of said relays II is positioned on tail 8 according to the range desired when this cannot be obtained by means of the cartridge alone.
  • a ange I2 (Figs. l and 2), the outer contour of which assumes the form of eccentric sectors I3 engaging with the inner edges of vanes I3, is secured to tail 8 by welding I2'a or other means.
  • the distance in a plane perpendicular to the axis of the tail of said axis to the several points of the outline of each sector increases, in the case of each one of them, in a counter-clockwise direction. It is therefore suicient to rotate the tail in the opposite direction to determine an increasing pressure on vanes 3, by means of flange I2, which pressure is utilised to hold the tail in position.
  • Flange I2 bears against a correspondingly shaped cut vIII (Fig. 3) provided in blades 3 of the set of vanes.
  • the projectile and its fuse are shaped in such a manner that their outline assumes a concave contour I5 in front and a convex contour IS at the rear, the concave and convex portions merging tangentially at point I'I, their combined length being between one and a half and three calibres.
  • the total length of the front portion up to the main diameter is approximately 2 calibres and the inexion point I1 is positioned at approximately 1 calibre from the main diameter.
  • the extension I 8 ofthe projectile is of decreasing diameter, the length of which measured up to the point of origin of the varies is between l and 3 calibres.
  • the curve of said rear portion merges tangentially with that of the fore part in proximity to the main diameter.
  • the length of the vanes is between 0.75 and 1.5 calibres.
  • the blades may be comparatively ⁇ thin and may be suitably shaped to reduce drag.
  • the projectile is provided, in the known manner, with a groove I9 housing an expanding leak-proof driving band 29 (a split brass ring for instance).
  • the fuse causes the ignition of a detonator 22, which consists of an explosive more powerful than the charge of the projectile, through a secondary primer 23 and a conical relay 24 which is separated from the detonator by a thin stamped cup or sheath 25 to prevent leakage.
  • a detonator 22 which consists of an explosive more powerful than the charge of the projectile
  • a secondary primer 23 and a conical relay 24 which is separated from the detonator by a thin stamped cup or sheath 25 to prevent leakage.
  • the edges 26 are folded over a plastic washer 2l, and are set in a groove 23 of the eye of the shell.
  • Secondary primer 23 and relay 24 can with advantage be positioned inea block 29 rotatably fitted in the body of the fuse.
  • Two channels are drilled through said block, one of which, 39, is empty while the other, 3
  • the projectile When the projectile is fired from a muzzle loaded smooth bore mortar, the barrel being inclined with respect to the horizon by the desired angle, the projectile, fitted with its cartridge 9 and, in case of need, with its relays I I, is inserted into it.
  • the shell slides into the bore by gravity and, on reaching the bottom, the cartridge strikes the ring pin which protrudes from the breech and deiiagrates and ignites relays II through holes I0, the gases of the latter combining with those of the main charge to provide propulsion.
  • the driving band 29 rising along ramp I9 provides a leak-proof joint between the bore and the shell.
  • the tail separates from the projectile upon firing. In case of need, holes might be drilled through flange I2 to give the required intensity to the ejecting effect.
  • vanes which are slightly inclined with respect to the longitudinal axis of the projectile also contribute to greater precision by remedying any defects in the symmetry of the shell which are compensated by its slow rotational speed along the trajectory.
  • the reduction in weight of the projectile procures a reduction in the energy of the recoil which is usually applied to a base plate laid on the ground. It is therefore possible to make this plate lighter and lsmaller which facilitates the transportation thereof.
  • vane assembly and the removable tail above described can be iitted to existing projectiles in lieu of the usual fixed tail with a View to improving their ballistic qualities.
  • a projectile comprising a body, a tail for carrying a propelling charge, means for centering :said tail along the longitudinal axis of said body and rearwardly of said body, a radially extending ange solid kwith said tail, stabilizing blades' iixed at the rear of said body, the outer contour of said ange assuming the iorm of eccentric sectors engaging the inner edges of the blades and adapted to exert an increasing pressure thereon when the tail is rotated in an appropriate direction about its longitudinal axis whereby the tail is temporarily ixed to the body, said tail being adapted to be detached from the shell atrin'g.
  • a projectile comprising a body presenting externally at its rear end an inwardly tapering conical recess, a tail for carrying a propelling charge, said tail vhaving a conical front end corresponding in shape to the conical recess of the body and engaging that recess, stabilizing blades fixed atthe rear end of said body, a flange solid with said tail, the outer contour of said ange assuming the form of eccentric sectors engaging the inner edges 0f the blades and adapted to exert an increasing pressure thereon when the tail is rotated in an appropriate direction in the recess, said tail being ⁇ adapted to be detached from the shell at ring.
  • a projectile comprising a body, a ring fixed to the rear end of saidbody and formed with an inwardly tapering conical recess, externally extending stabilizing blades on said ring, a tail for carrying a propelling charge, said tail having a conical front end corresponding in shape to the conical recess in the ring and engaging said recess, a ange solid with said tail, the outer contour of said flange assuming the form of eccentric sectors engaging the inner edges of the blades and adapted to exert an increasing pressure thereon when the tail is rotated in an appropriate direction about, its longitudinal axis whereby the tail is temporarily xed to the body, said tail being adapted to be detached from the shell at ring.
  • a projectile comprising a body having stalbilizing blades xed adjacent the rear end thereof, a tail structure carrying a propelling charge and disposed axially of said body and inwardly from the inner edges of the blades, and means including cam-shaped surfaces projecting substantially radially from the tail structure and engageable with increasing pressure on the inner edges of the blades upon appropriate rotation of the tail structure for temporarily fixing the said tail structure to said body up to the moment of ring whereby to permit the tail structure to be detached from the body at firing.
  • a projecile comprising a body having stabilizing blades xed adjacent the rear end thereof, a tail structure carrying a propelling charge and disposed axially of said body and inwardly from the inner edges of the blades, the inner edges of said blades being provided with cut-out portions, and flange means extending substantially radially from said tail structure and having cam-shaped surfaces engageable with the cut-out portions on said blades for temporarily fixing said tail structure to said body up to the moment of ring whereby to permit the tail structure to be detached from the body at iiring.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Toys (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Steering Devices For Bicycles And Motorcycles (AREA)
US286278A 1938-07-30 1939-07-24 Vaned projectile Expired - Lifetime US2315145A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
LU214639X 1938-07-30

Publications (1)

Publication Number Publication Date
US2315145A true US2315145A (en) 1943-03-30

Family

ID=19732377

Family Applications (1)

Application Number Title Priority Date Filing Date
US286278A Expired - Lifetime US2315145A (en) 1938-07-30 1939-07-24 Vaned projectile

Country Status (6)

Country Link
US (1) US2315145A (en(2012))
BE (1) BE435707A (en(2012))
CH (1) CH214639A (en(2012))
FR (1) FR859381A (en(2012))
GB (1) GB538712A (en(2012))
NL (1) NL52634C (en(2012))

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2458475A (en) * 1943-04-02 1949-01-04 Charles C Lauritsen Rocket device
US2498080A (en) * 1946-06-05 1950-02-21 Brandt Edgar Ets Projectile equipped with fins
US3788230A (en) * 1969-01-29 1974-01-29 A Losfeld Universal projectile
US4010688A (en) * 1972-11-17 1977-03-08 Smith Matthew S Weapon arrangement
US4405100A (en) * 1981-02-20 1983-09-20 The United States Of America As Represented By The Secretary Of The Navy Turbulence generator for maximizing configuration tolerances of free flight ordnance
FR2561764A1 (fr) * 1984-03-21 1985-09-27 Losfeld Christian Projectile economique pour mortier
USD401302S (en) 1997-04-28 1998-11-17 Glorious Company Missile fin unit
US20050082419A1 (en) * 2003-06-27 2005-04-21 Richard Dryer Projectile with propelling charge holder
WO2018109436A1 (en) * 2016-12-16 2018-06-21 Bae Systems Plc Mortar bomb
EP3351891A1 (en) * 2017-01-18 2018-07-25 BAE SYSTEMS plc Mortar bomb
US20230194222A1 (en) * 2020-05-22 2023-06-22 Bae Systems Bofors Ab Short-range projectile

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU31733A1 (en(2012)) * 1951-11-07
SE432152B (sv) * 1983-02-09 1984-03-19 Ffv Affersverket Anordning for sammankoppling av en projektil med en projektilforlengningsdel
GB2557925A (en) * 2016-12-16 2018-07-04 Bae Systems Plc Mortar bomb

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2458475A (en) * 1943-04-02 1949-01-04 Charles C Lauritsen Rocket device
US2498080A (en) * 1946-06-05 1950-02-21 Brandt Edgar Ets Projectile equipped with fins
US3788230A (en) * 1969-01-29 1974-01-29 A Losfeld Universal projectile
US4010688A (en) * 1972-11-17 1977-03-08 Smith Matthew S Weapon arrangement
US4405100A (en) * 1981-02-20 1983-09-20 The United States Of America As Represented By The Secretary Of The Navy Turbulence generator for maximizing configuration tolerances of free flight ordnance
FR2561764A1 (fr) * 1984-03-21 1985-09-27 Losfeld Christian Projectile economique pour mortier
USD401302S (en) 1997-04-28 1998-11-17 Glorious Company Missile fin unit
US20050082419A1 (en) * 2003-06-27 2005-04-21 Richard Dryer Projectile with propelling charge holder
US7024998B2 (en) * 2003-06-27 2006-04-11 Raytheon Company Projectile with propelling charge holder
WO2018109436A1 (en) * 2016-12-16 2018-06-21 Bae Systems Plc Mortar bomb
US10473442B1 (en) 2016-12-16 2019-11-12 Bae Systems Plc Mortar bomb
EP3351891A1 (en) * 2017-01-18 2018-07-25 BAE SYSTEMS plc Mortar bomb
US20230194222A1 (en) * 2020-05-22 2023-06-22 Bae Systems Bofors Ab Short-range projectile

Also Published As

Publication number Publication date
NL52634C (en(2012))
GB538712A (en) 1941-08-14
CH214639A (fr) 1941-05-15
FR859381A (fr) 1940-12-17
BE435707A (en(2012))

Similar Documents

Publication Publication Date Title
US2315145A (en) Vaned projectile
US2788744A (en) Projectile for mortar
US4140061A (en) Short-range discarding-sabot training practice round and self-destruct subprojectile therefor
US4015527A (en) Caseless ammunition round with spin stabilized metal flechette and disintegrating sabot
US2382152A (en) Projectile adapter
US2426239A (en) Rocket shell
JP6499649B2 (ja) 発射体本体を伴う小火器用又は軽火器用弾丸
US4712465A (en) Dual purpose gun barrel for spin stabilized or fin stabilized projectiles and gun launched rockets
US3905299A (en) Discarding sabot projectiles
US5388524A (en) Practice projectile
US3919799A (en) Grenade launcher and annular cartridge therefor
US3388666A (en) Rifle grenade
US2500117A (en) Rocket projectile
US2433334A (en) Ammunition
US3024729A (en) Ram jet projectile
US2669930A (en) Sabot projectile
US4805535A (en) Projectile
US2694364A (en) Streamlined mortar shell
US2325560A (en) Ordnance
US2941469A (en) Projectile construction
US2472111A (en) Recoilless firearm and ammunition therefor
US2234165A (en) Projectile
US2091635A (en) Projectile
US5092246A (en) Small arms ammunition
US3977324A (en) Sabotless micro projectile