Author Topic: Pansarbandvagn 302 Derivatives  (Read 661 times)

Offline apophenia

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Pansarbandvagn 302 Derivatives
« on: September 25, 2024, 09:31:48 AM »
"Have Gun – Kommer att resa"

The Swedish Artillerikanonvagn 151 programme was long and drawn out. When FMV required AB Landsverk to redesign the Akv 151 to be based on the hull of the Stridsvagn 103 tank, the programme was delayed even further. By the time AB Bofors had revised the Akv 151 into their Bofors Vagnkanon 155 mm L/50 (VK 155 L/50), rival firm Hägglund & Söner foresaw future problems arising from the highly automatic gun system. The problem for Hägglunds was that they could offer no obvious direct replacement design.

Instead, Hägglund & Söner pitched a much smaller SP gun based on existing technology. The running gear would be based on the pbv 302 APC which Hägglunds had just begun delivering to Försvaret. On that modified Pbv 302 hull would be mounted the proven turret system from the British Vickers FV432 Abbot self-propelled gun. It was proposed that Bofors license the Abbot's Royal Ordnance Factory 105 mm piece. This proposal was accepted by FMV as an interim SP gun for the Armén (and potentially as an export vehicle).

The new SP gun was designated as the 10,5 cm Bandkanon 2 and the Göta artilleriregemente (A 2) was stood up again to train of these Bkan 2s. Assigned to MekB 4 (the Skaraborg Mechanized Brigade) at  Skövde, A 2 quickly demonstrated that their Bkan 2s could keep up with the Strv 101/102 tanks and the Pbv 302 APCs (with which the SPs shared a common running gear). It was assumed that, eventually, these 'lätt bandkanon' would be replaced by the larger Bkan 1. Budget constraints dictated that few of the complex and expensive Bkan 2s were delivered - all of which went to the Bodens artilleriregemente ( A 8 ) based in the north).

Son till Pbv 302 - The Psv 3020 Recce Car

Hägglund & Söner had several other 'private venture' derivatives of their Pbv 302 APC. One which reached fruition was a short-hulled reconnaissance car. Military interest was sparked when FMV officials saw the partially completed prototype at the Örnsköldsvik factory. It was proposed that Försvaret would subsidize further development of this 'car', with the Armén being supplied with a trial vehicles from a pre-production batch. These trial vehicles would be designated Pansarspaningsvagn or Psv 3020. [1]

The prototype initially sported the same turret as the Pbv 302 APC, complete with its obsolete 2 cm akan m/47D autocannon. FMV recommended an upgrade to the 2 cm akan m/70 gun - a Bofors-licensed version of the German Rheinmetall Rh-202 autocannon. Bofors also created a dedicated turret design for the new Psv 3020. Service trials were successful but, as potential operators, the MekBrigads concluded that the Psv 3020 offered little that was not already available with the Pbv 302. Further Psv 3020 development was halted and all pre-production Psv 3020s were converted into Bgbv (Bärgningsbandvagn) 3021 ARVs.

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[1] Wheeled armoured cars were designated as Pansarbil (Pb). The new Psv designation prefix implied a tracked vehicle rather than specifically referring to it as a 'bandvagn'.
« Last Edit: October 01, 2024, 09:11:19 AM by apophenia »
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Re: Pansarbandvagn 302 Derivatives
« Reply #1 on: September 26, 2024, 01:10:08 AM »
 :smiley:
All hail the God of Frustration!!!

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Offline Buzzbomb

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Re: Pansarbandvagn 302 Derivatives
« Reply #2 on: September 26, 2024, 02:46:15 PM »
That’s nice work

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Re: Pansarbandvagn 302 Derivatives
« Reply #3 on: September 27, 2024, 01:09:20 AM »
What about a pbv 302 with a multi launcher for the Bantam ATGW - similar to this:



Or perhaps one with Rapier SAMs?
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Offline apophenia

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Re: Pansarbandvagn 302 Derivatives
« Reply #4 on: September 28, 2024, 05:04:02 AM »
... Or perhaps one with Rapier SAMs?

Nice! On it ...
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Offline apophenia

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Re: Pansarbandvagn 302 Derivatives
« Reply #5 on: September 29, 2024, 09:16:16 AM »
'Värja' - the Swedish Tracked Rapier System

By the 1970s, Sweden's Armén was considering a smaller and much more mobile surface-to-air missile. Such a SAM system would slot in below the capabilities of the in-service Rb 67 HAWKs and Rb 68 Bloodhound Mk.IIs while replacing the aging Bofors 40 mm lvakan m/48 AA guns. [1] By 1969, Bofors AB had also been contracted to produce what would later emerge as the smallest Swedish SAM - the Rb 70 SHORAD, a replacement for the US-built Rb 69 Redeye MANPADS.

Although several low-altitude SAMs were put forward for Försvaret use, the FMV rejected the  Franco-German Roland for being 'daylight only' (the all-weather Roland 2 remaining conceptual at that point). The French R440 Crotale met most technical requirements but, riding an export wave, Thomson CSF Matra wanted to sell a complete, integrated system - local modifications and carrier vehicle types were most unwelcome. By a process of elimination, FMV was left with the British BAC Rapier which was accepted into service as the Rb 66. [2]

While the off-the-shelf Rapier suited Flygvapnet air base defence needs, Armén required a mobile SAM. Having rejected BAC's trailer-mounted proposal, Hägglund & Söner pitched a missile carrier based upon their Pbv 302 APC. This carrier concept was adopted as the Luftvärnsrobotvagn 661. This mounted a modified Rapier system on the rear deck of an altered Pbv 302. This revised missile/launcher combination fell under FMV's Projekt Värja - the värja having been a Swedish rapier.

Projekt Värja - Delivering a System of Systems

The Lvrbv 661 differed little in appearance from a standard Pbv 302 APV. However, the rear section was now open to the elements. This was to facilitiate operation of the Rb 66 SAMs. The original BAC Rapier system was effectively divided into two. The lower compenent - consisting of radar electronics and a guidance computer - would be mounted under cover in the bottom of the Lvrbv 661's rear compartment. Umbicals connect this lower component to the upper. This cylindrical upper component - consisting of missile launch arms, surveillance radar (with dish and IFF under the same radome); and, at the front, a prominent parabolic antenna for missile guidance signals - was mounted on scissor jacks.

On the move, most of the Rb 66 system would be protected behind the Lvrbv 661 armoured walls. Only the system's surveillance radar and IFF antenna were exposed. Coming into action, the scissor jacks were raised, bring the missiles and their guidance radar above the hull sides of the Lvrbv 661. Although Lvrbv 661 mobility was emphasized, that was for deployment of the Rb 66 missiles. For the Lvrbv 661 was part of a system-of-systems. On arrival at a firing location, the Lvrbv 661 would be joined by a control vehicle (a modified stripbv 3021 command post); 2-to-4 PS-70/R Giraffe radar units; [3] an all-weather radar system -  the Saab-Marconi DN 181S 'Blindeld'; and 2-to-4 radar-assisted 57 mm lvakan m/54 Bofors guns.

_________________________________________________

[1] The lvakan m.48s went to Hemvärnet reserve units as dual-purpose anti-helicopter and ground fire support weapons. The related 57 mm lvakan m/54 guns would be integrated into the larger Värja system.

[2] The designation Rb 66 seems to have been intentionally confusing - duplicating numbers from the rejected Rb 366 Bomarc SAM and the entire designation of USAF RB-66 Destroyer recce aircraft. Chronologically, the Rb 66 came much later than either the Rb 67 HAWK or Rb 68 Bloodhound Mk.II SAMs.

[3] The PS-70/R Giraffe radar was attached to an arm which raised the antenna 12 m above the terrain. This combo was carried by a 6x6 Terrängbil 40 (TgB 40 or Scania SBAT 111S) truck. The more compact DN 181S 'Blindeld' system was carried by a smaller 4x4 Terrängbil 30 (TgB 30 or plain Scania SBA 111).
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Re: Pansarbandvagn 302 Derivatives
« Reply #6 on: September 30, 2024, 12:55:26 AM »
 :smiley:
All hail the God of Frustration!!!

You can't outrun Death forever.
But you can make the Bastard work for it.