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Sisu (SAT) P-44b Medium Tank

5,802 DragonAerotech  8.5 years ago

The P-44 Medium Tank (The "P-" prefix was used on account of the Finnish word for Tank, "Panssari,") was a parallel departure from German design strategies in which the belly was low to the ground and tracks were comparatively narrow. The P-44 hull design would include wider tracks and an elevated hull while still remaining narrow enough for passage through most roads.

Propelled by a single imported 150 HP Maybach HL 45 P engine normally, both models of the P-44 were unique in that they had a secondary Maybach HL 38 TR producing 100 HP, under license production with Sisu, for emergency power. This was a measure both to conserve on diesel fuel for maximum range and to avoid losses as a result of the loss of control in combat - a fate many of her Soviet and German contemporaries had a predisposition for. This required the engines to be kept in good working order and to operate at peak performance in hill covered terrain or when faced with steep inclines. Thus it was not uncommon for P-44's to burst seals on their primary engine and for their crews to nurse their crippled vehicle home on only their secondary engine. Combined with the fact that maintenance had to be conducted on the engine from inside of the vehicle or to swap out engines required the entire turret to be removed by crane made the P-44 quite unpopular with field engineers.

Remarkably, by 1944, most of Germany's medium and heavy tanks were using far higher horsepower engines than the P-44's twin engine configuration combined yet the simplistic and easy maintenance chassis and unique drive capabilities may have explained the P-44's performance despite the aforementioned shortcomings with engine maintenance.

Armor wise the P-44 design was no slouch when compared to German or Soviet types. The Finns used the P-44, in both varieties, as a Medium Tank while the Soviets gave it the wide berth deserving of a heavy tank. The turrets were heavily angled and consisted of thick welded armor plate with a mantlet slighly superior to that used on the Panther of the Wermacht. Furthermore the turrets were well fitted providing very narrow "shot traps" beneath the fore and aft of the turret when turned 45 degrees in either direction between the bottom of the turret where only 30 mm of armor was available and the armored plating that covered the top of the "tracks." The hull was similarly heavily angled with only the half-skirts providing a direct point of impact which even then provided fair protection. Besides these features the armor to the rear of the vehicle was comparatively vulnerable, which could potentially knock out the cooling and exhaust system for the twin engines. A direct and square hit from a high velocity 76 mm cannon or greater could knock out said systems, the fuel tank and potentially the ammo stores.

The Finns were well aware of this weakness and were very careful in their use of tank destroyers and scout tanks to ward off flanking maneuvers by vehicles with heavy weaponry.

The P-44b variant entered production a few months after her sister design as negotiations to acquire a significant number Krupp 8.8 cm KwK 36 L/56 Cannons finally were concluded. Installed in a redesigned turret with heavier armor the P-44b became the terror of the battlefield on the Northeastern front with some even being diverted to the Wermacht. Boasting the speed and mobility of a medium tank with the firepower of a heavy tank, without the clever deployment of KV-2 and various tank busters, it is highly likely that Finland would have routed Soviet forces deployed along the Northeastern front. As if the 8.8 cm cannon was not enough the new turret had fixtures on the sides of the turret that a pair of 7 shot 3 cm rocket launchers could be fitted to, allowing this machine to be a single vehicle siege engine against enemy fortifications. In terms of secondary armaments like her sister design, the P-44a, she carried a pintle mounted MG 137(t) and a hull mounted MG of the same type, both of 7.92 mm Mauser cartridge type. (Many of the MG 137(t)s were reused from P-41 Light Tanks that had been converted to ammo carriages, assault guns and self-propelled artillery pieces.)

Forward & Reverse - Pitch
Steering - Roll
Brake ...

Bear in mind this is a 51 and 1/4 ton vehicle, maximum safe speed to drive is 30 mph depending on terrain. On declines speed will quickly get away from you. Use engine braking or brakes to keep within a safe margin. Remember; Tanks were not meant to be speed demons, their horsepower was intended to create a moving bunker of armor and devastating weaponry through hostile territory and uneven terrain. The P-44b has the advantage of emergency power if it becomes bogged down. Before traveling over uneven terrain it would be a good idea to use AG1 and elevate the gun so its long barrel doesn't impact hillsides you are preparing to climb! See the Control Groups for details.

AG 1 - Activates the turret, VTOL to rotate, Trim to elevate and decline the main cannon and rocket launchers.
AG 2 - Activates the pintle mounted machine gun; Yaw to rotate the field of fire side to side.
AG 3 - Activates the hull mounted machine gun; Yaw to rotate the field of fire side to side.
AG 4 - Activates the emergency power engine to add a boost of power to the "treads" to climb steep inclines. To conserve on fuel, deactivate when unnecessary.
AG 5 - Headlights & tail lights.
AG 6 - Right turn signal.
AG 7 - Left turn signal.

Camera 1 - Tank Commander's periscope.
Camera 2 - Driver's periscope.

Notes: The tracer colors for these weapons are, to the best of my knowledge historically accurate. The rate of fire, calibers, projectile weights and so on for the Czech version of the Lewis Machine Gun which used the 7.92 mm Mauser ammo, the same as many German Machine-Guns and the 8.8 cm cannon has been reconfigured to fire single shots with a minimum delay of 5 seconds between rounds fired and, based on WW2 American and British veteran accounts, the tracer color was made to be green.

Although Finland had minimal direct combat against the other allies as their war was one of defending Finland from the expansionist policies of the Soviet Union in reality, with the success of Operation Sealion and the stages of combat that have followed, Finland was forced under diplomatic pressure to declare war on the remaining allies - further cementing their fate to Nazi Germany.

Shared Soviet intelligence with the Western allies resulted in American troops coining the P-44 series as "The Killroy," due to the placement of headlamps and the pronounced central armored housing for the hull mounted gun.

Finally, this build is for @General360 role-play alternate WW2 history. This vehicle, despite the attention to historical accuracies with its weaponry, is fictional.

General Characteristics

  • Successors 1 airplane(s)
  • Created On Windows
  • Wingspan 11.5ft (3.5m)
  • Length 35.6ft (10.9m)
  • Height 9.7ft (3.0m)
  • Empty Weight 100,524lbs (45,597kg)
  • Loaded Weight 102,456lbs (46,473kg)

Performance

  • Wing Loading 50,765.5lbs/ft2 (247,858.8kg/m2)
  • Wing Area 2.0ft2 (0.2m2)
  • Drag Points 6559

Parts

  • Number of Parts 323
  • Control Surfaces 0
  • Performance Cost 1,436
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    @SUKHOI Thanks for the upvote! ^_^ This was designed for a group build - quasi-RP. (I say quasi, since attempts at diplomatic dialog in the RP posts were ignored and discussions about tactics and strategy were similarly ignored by the moderator for the alternate history setting.)

    6.4 years ago
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    @TAplanes Thanks for the upvote! ^_^

    8.3 years ago
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    @LouisEP Thanks! ^_^ @Pilotmario Nah, don't worry about it for now. I had a couple of minor ideas in mind but nothing set in stone. After the alternate WW2 RP I'm in is over I might come back and revisit the idea, thanks for the consideration though!!

    8.5 years ago
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    147k Pilotmario

    @DragonAerotech I suppose I can form a new continent, previously undiscovered.

    How does Southland sound? It's basically where Antarctica is, except without ice.

    8.5 years ago
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    147k Pilotmario

    @DragonAerotech Karama is a pretty wild continent tbh.

    8.5 years ago
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    @Pilotmario lol Ok I will take the hint to stay out of the RP. XD

    8.5 years ago
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    147k Pilotmario

    Don't bother with the Sanctans. They have no money, and what money they do have is dumped into the coffers of the religious leaders or spent on enforcing religious dogma. They have five Providers, thirty Pummelers, and 15 Trojan helicopters. Of that, none of the Providers, six Pummelers, and three Trojans can be considered airworthy. Their army has 10 light tanks, of which two are operational. Their soldiers are unmotivated conscripts, the officers corrupt cronies, and the politicians infirm and inbred.

    Good luck with the Teutons and their 20 million man army though. @DragonAerotech

    8.5 years ago
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    @Pilotmario Originally I was going to build for a foreign power which is why I was interested in the Sanctans. Although once this WW2 Alternate RP is done I could create a home grown power on the same continent as the Teutonics. These will not be of the DragA brand but will somehow be a twist on a historic power. I figured it'd be best to understand the remants of that Empire before I put serious thought/consideration into it.

    8.5 years ago
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    147k Pilotmario

    @DragonAerotech The Sanctans? I'm not sure. As they are a theocracy based on still-practiced religions, I do not know whether such content would be considered appropriate. The only design which we have accepted as part of our air force was your A-8, as modified and produced by Bandit, and as a patrol aircraft for Coast Guard units. Almost all of the aircraft used by the Pilotmario Armed Forces are locally designed and produced.

    8.5 years ago
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    @Pilotmario Spare me the sarcasm, please! lol BTW did you ever put together that fact file on the remnants of that crumbled empire? I forget it's name. I've seen you've been busy with the Teutonics though. Anyone else submitting allied or enemy designs to the RP at the moment?

    8.5 years ago
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    @General360 I need to get some more planes in the air and maybe a few ships in the water before I go back to armored vehicles. I was shocked when I went to upload a new jet fighter and found I had reached my limit! I uploaded the three tanks but that was it. I thought the limit was 5 per day? Ah well, it'll give me time to surpass that jet fighter and build the medium bomber I've got in mind.

    8.5 years ago
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    147k Pilotmario

    Beautiful story.

    8.5 years ago
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    @General360 Don't forget the P-44a variant~ lol Ugh, I've got to respect your' work on that Tiger tank. The first P-44s I built wound up being like 20 feet wide so I had to go back to the drawing board. These were too far progressed to think about applying the Torsion Bar suspension you developed though.

    8.5 years ago
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    @General360

    8.5 years ago