Welcome to the Inert Ordnance Collectors.
  • Login:
Results 1 to 8 of 8
  1. #1
    Senior Member
    Join Date
    Feb 2009
    Location
    USA
    Posts
    566
    Thanks
    1,234
    Thanked 338 Times in 158 Posts

    Information Request On South African 76mm TPFSDS-T Range Reduction System

    Hoping someone here can provide information on the range reduction system/methods used on this unusual, South African, 76mm TPFSDS-T projectile used on their, Rooikat (Caracal) light, armored vehicle.


    I have been studying large bore, primarily, tank fired, SABOT rounds for years and have never seen this style of range reduction used before. Most utilize a coned stabilizer system, some with ported and some with fluted cone stabilizers to take advantage of the, LKL Principle (LochKegelLeitwerk Principle ) to reduce the travel distance of the sub-projectile. The, Israelis have a 105mm TPFSDS-T projectile with 4 small pyrotechnic charges above the tracer that after a known distance detonate to separate the projectile mid flight causing it to fall with-in a designated range. The, UIS had and experimental 105, TPFSDS-T projectile with a ballistic windscreen that would melt due to aerodynamic heating causing the sub-projectile dart to split in half along the entire length of the dart, causing it to fall with-in a safe distance.


    This, South African, 76mm, TPFSDS-T projectile seems to have 4 individual tubes connected to each fin blade to reduce distance. This is the only photo I have ever seen of it. Would love more information if anyone has any knowledge of this TP round.


    To the best of my knowledge, these, 76’s used by, South Africa are an, Israeli/German (IMI/Diehl) design?
    I am attaching photos of the INERT, tactical, 76mm APFSDS, projectiles in my collection for comparison.



    Jason
    PS: I apologize about the sideways orientation on the first two photos. They are vertical on my computer and have no idea why they are being posted sideways.

    S African 76mm A.jpgS African 76mm B.jpgS African 76mm TP - A.jpegS African 76mm TP - B.jpeg

  2. The Following 5 Users Say Thank You to apfsds For This Useful Post:

    Andy Naude (18th October 2021), Dronic69 (18th October 2021), Joerg (18th October 2021), SG500 (19th October 2021), Wolchonok (19th October 2021)

  3. #2
    Senior Member
    Join Date
    May 2011
    Location
    Russia
    Posts
    168
    Thanks
    42
    Thanked 251 Times in 95 Posts
    M890A2 look like scaled down version of M111, so TPFSDS-T must be same as israeli, great pics !



    they have a family of rounds for 105, 100, 90, 76 and 60mm guns
    Last edited by Wolchonok; 19th October 2021 at 01:57 PM.

  4. The Following 2 Users Say Thank You to Wolchonok For This Useful Post:

    apfsds (19th October 2021), HAZORD (23rd October 2021)

  5. #3
    Senior Member
    Join Date
    Feb 2009
    Location
    USA
    Posts
    566
    Thanks
    1,234
    Thanked 338 Times in 158 Posts
    Agree! The, Israeli designs are unmistakable. They are used under license by a few countries and manufacturers.

    I really like the way they are displayed in this picture you shared.

    Jason

  6. #4
    Senior Member
    Join Date
    Feb 2009
    Location
    USA
    Posts
    566
    Thanks
    1,234
    Thanked 338 Times in 158 Posts
    Also, JANE'S AMMUNITION, shows, 100mm, 115mm and 125mm, made for foreign sales.

    Jason

  7. #5
    Senior Member
    Join Date
    May 2010
    Location
    Somewhere
    Posts
    261
    Thanks
    70
    Thanked 219 Times in 132 Posts
    I'd image the 'fins', aka the hollow tubes, act like the single tube of the the UK's 30 mm RARDEN (30×170) Reduced Range Training Round Tracer (RRTR-T). As such the tubes attached to the fins, like the RRTR-T, work on the choked flow principle. During high supersonic flight the shockwave produced near the mouth of the 'tube' travels cleanly through the tube, but during lower supersonic flight the flow is choked. The choked flow drastically increases the drag on the rear of the projectile, hence rapidly slowing it down after that point.
    Last edited by Eggburt1969; 23rd October 2021 at 12:16 AM.

  8. #6
    Senior Member
    Join Date
    Feb 2009
    Location
    USA
    Posts
    566
    Thanks
    1,234
    Thanked 338 Times in 158 Posts
    Yes, agree! The, LKL Principle, is certainly how it works.

    Now, I gotta look up that, 30mm you mentioned :-) Thank you so much.

    Jason

  9. #7
    Senior Member
    Join Date
    May 2010
    Location
    Somewhere
    Posts
    261
    Thanks
    70
    Thanked 219 Times in 132 Posts
    Yes essentially the same type of idea, but it won't infringe on any of Rheinmetall's patent's (US4195573, US4195573 , etc.).

    Just search for tubular projectile, that should bring a few results up. A patent that covers tubular projectile is US4164904.

    A screenshot from the 'Medium Calibre Section' of the 1998 'BAe RO Ammunition Handbook' on the 30 mm RARDEN (30×170) RRTR-T round is below.

    Untitled.jpg

  10. The Following User Says Thank You to Eggburt1969 For This Useful Post:

    apfsds (24th October 2021)

  11. #8
    Senior Member
    Join Date
    Feb 2009
    Location
    USA
    Posts
    566
    Thanks
    1,234
    Thanked 338 Times in 158 Posts
    Your the best! Thank you so much for this great information and reference photo, Eggburt!

    I especially like the information that alternate designs had to be found to avoid any, Patent infringements.

    Jason

 

 

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Back to top