COMPETITION Steel Chariot of The Prairie: The Lone Free State's First Battle Tank (2247)

[Sturgeon]

Just now, Lord_James said:

Well, yeah, I’m not talented.

 

Nah, I don't think it's really a matter of "talent", tbh, I just like working with castings. It's sort of an eternal penance for fucking up the Donward's turret so bad.

[Sturgeon]

3 minutes ago, Lord_James said:

In regards to the complex surfaces and whatnot, you could always take the T-72B route and cast it in such a way as to have a nice hollow space to place a couple layers. 

 

You haven't seen my turret yet.

[Sturgeon]

Merkav'er? I 'ardly know 'er!

 

 

in case anyone's wondering if the driver's comfortable

[Toxn]

Something to note: with the change in ME/TE of HHA, textolite is now the supreme form of non-reactive armour. Build your arrays accordingly.

[Dominus Dolorem]

46 minutes ago, Toxn said:

Something to note: with the change in ME/TE of HHA, textolite is now the supreme form of non-reactive armour. Build your arrays accordingly.

Is textolite more mass efficient than NERA?

[Toxn]

1 hour ago, Dominus Dolorem said:

Is textolite more mass efficient than NERA?

Hahahahahaha, no.

[Sturgeon]

Nobody's using turbines right? I didn't mention it in this thread yet, nor update the range calculator, but there's an 0.7 times modifier on range for turbines.

[Beer]

  

3 minutes ago, Sturgeon said:

Nobody's using turbines right? I didn't mention it in this thread yet, nor update the range calculator, but there's an 0.7 times modifier on range for turbines.

 

Is the Lone state of Texas even able to produce high heat reistant alloys for turbine vanes? 

[Sturgeon]

13 minutes ago, Beer said:

  

 

Is the Lone state of Texas even able to produce high heat reistant alloys for turbine vanes? 

 

They have turbine powered helicopters.

[Toxn]

53 minutes ago, Sturgeon said:

 

They have turbine powered helicopters.

Some of them even make it back to the helipad they flew off from.

[Lord_James]

6 hours ago, Toxn said:

Something to note: with the change in ME/TE of HHA, textolite is now the supreme form of non-reactive armour. Build your arrays accordingly.

It shouldn’t, because the textolite ME/TE was for 260-300 bhn armor, not 360 bhn armor. 

[Toxn]

56 minutes ago, Lord_James said:

It shouldn’t, because the textolite ME/TE was for 260-300 bhn armor, not 360 bhn armor. 

Good point.

 

Judges, what's the TE for textolite now?

[Sturgeon]

15 minutes ago, Toxn said:

Good point.

 

Judges, what's the TE for textolite now?

 

@N-L-M @LoooSeR

[N-L-M]

I propose assuming the hardness of the RHA, as given, is flavor text, And that the TE and ME don't change.

[Toxn]

1 minute ago, N-L-M said:

I propose assuming the hardness of the RHA, as given, is flavor text, And that the TE and ME don't change.

Yay textolite! Yay good mass efficiency and terrible thickness efficiency!

[Lord_James]

4 minutes ago, N-L-M said:

I propose assuming the hardness of the RHA, as given, is flavor text, And that the TE and ME don't change.

Oh boy... at least I can revert back to my original armor scheme  

[Lord_James]

8 minutes ago, N-L-M said:

I propose assuming the hardness of the RHA, as given, is flavor text, And that the TE and ME don't change.

This applies to fused silica too, right? 

[N-L-M]

17 minutes ago, Lord_James said:

This applies to fused silica too, right? 

Yes.

[Lord_James]

I've decided on a nickname for my vehicle: Brahman. 

 

 

Just some updates: 

• added sponsons 
• reduced turret roof height by 6 inches 
• increased barrel length to 32 calibers and breach counterweight (it is no longer "balanced", but I think I have a work around)
• reduced upper front and roof plate thickness to 0.8 inches (20mm)
• revised some geometry, to reduce weight (currently at 28.45 tons)

 

What would be a "good weight" for my engine? I have it currently modelled as 3.5 tons (3180 kg), including the liquid cooling and transmission. It's a 12 cylinder, 6.9 inch (175mm) bore by 7.1 inch (180mm) stroke, 1000hp engine based off the MB 838. 

[Sturgeon]

26 minutes ago, Lord_James said:

I've decided on a nickname for my vehicle: Brahman. 

 

 

Just some updates: 

• added sponsons 
• reduced turret roof height by 6 inches 
• increased barrel length to 32 calibers and breach counterweight (it is no longer "balanced", but I think I have a work around)
• reduced upper front and roof plate thickness to 0.8 inches (20mm)
• revised some geometry, to reduce weight (currently at 28.45 tons)

 

What would be a "good weight" for my engine? I have it currently modelled as 3.5 tons (3180 kg), including the liquid cooling and transmission. It's a 12 cylinder, 6.9 inch (175mm) bore by 7.1 inch (180mm) stroke, 1000hp engine based off the MB 838. 

 

That sounds about right. A decent transmission will be 2000 kg or so

[Lord_James]

2 hours ago, Sturgeon said:

 

That sounds about right. A decent transmission will be 2000 kg or so

 

I was thinking more along the lines of a beefed up Sherman transmission, preferably the "high speed reverse transmission" (mid-way down the page)

#33 The Sherman Of The Future: Advanced Sherman UpGrades That Almost Made It Into Production. | The Sherman Tank Site

 

But yeah, my components are too light, should be closer to 4 tons, the normal MB 838 is nearly 2 tons dry. 

[Sturgeon]

1 hour ago, Lord_James said:

 

I was thinking more along the lines of a beefed up Sherman transmission, preferably the "high speed reverse transmission" (mid-way down the page)

#33 The Sherman Of The Future: Advanced Sherman UpGrades That Almost Made It Into Production. | The Sherman Tank Site

 

But yeah, my components are too light, should be closer to 4 tons, the normal MB 838 is nearly 2 tons dry. 

 

https://apps.dtic.mil/dtic/tr/fulltext/u2/a105411.pdf

[Sturgeon]

@Lord_James I think you are the only competitor not on the discord, I wanted to make sure you were aware that what is considered LFP cannot be any higher than 42" off the ground. Anything higher than that on the hull has to meet the UFP protection requirement.

[Toxn]

I bring tidings:

 

The first is a low-pressure gun for conservative HEAT slinging.

 

The second is a mini-turret for doing mini-turret things while aggressively Texan.

[A. T. Mahan]

On 5/4/2021 at 9:18 AM, Sturgeon said:

Nobody's using turbines right? I didn't mention it in this thread yet, nor update the range calculator, but there's an 0.7 times modifier on range for turbines.

 

I'm sticking with a forced induction diesel V-12, although the option of a turbine is interesting and may be compelling given the climatic conditions in the northern areas of Texan territory, a la the Russian Federation use of T-80 in their far northern areas. That being said, the 2240 cubic inch 60-degree diesel V-12 makes sufficient power when the specific power output of the AVDS-1790 is considered that it is more than sufficient for a vehicle of the protection and armament I am working with.

 

Also, as a solution to the loader situation, I'll be bringing an autoloaded 5"/48 gun in a welded box turret. 

 

@N-L-M What's the L:D permissible for steel DS penetrators?