Hobby Boss Kits

[zenrat]

Well if you had three 18" guns then why not have them in three turrets for'ard like a mini Nelson class?

[PR19_Kit]

I LIKE that idea, with the middle one higher than the other two?   

I'd need two kits to extend the bows enough though, that's £80+......................

[NARSES2]

I reckon 1 18" turret forward, 1 aft, and then you can sail up and down the Nile, Tigres, Euphrates (take your pick) and bombard both shores at tthe same time 

[zenrat]

Fire one gun port, and the other starboard, and do a quick 180...

[Charlie_c67]

Or Fire all on one side at the same time and scoot the opposite way a few yards. ultimate torpedo evasion... 

[Weaver]

If you were on the Nile and you fired both guns the same way, you'd go sideways so hard you could wash your enemies off the opposite bank with the wave as a bonus.

[Beermonster58]

That looks MAGNIFICENT Buzzy! 

I didn't know they did the Roberts, I'd have taken more note.

They do BOTH of the Roberts Class monitors. HMS Abercrombie being the other one. Not sure what the difference is though

[Rheged]

That looks MAGNIFICENT Buzzy! 

I didn't know they did the Roberts, I'd have taken more note.

They do BOTH of the Roberts Class monitors. HMS Abercrombie being the other one. Not sure what the difference is though

Abercrombie was just under a foot wider and about 600 tons greater displacement,  but I can't see the two kits reflecting that!

[PR19_Kit]

Hmmm, how much is a 1/350 scale ton?

[kitbasher]

Hmmm, how much is a 1/350 scale ton?

Approximately 6.3 lbs

[Rheged]

Hmmm, how much is a 1/350 scale ton?

Literal answer, not very much at all!

Assuming you are building to scale weight, it's 6.4 pounds, and the just under a foot wider than Roberts is about 0.03 of an inch ............but remember my degree is history and geography so the maths used here might be suspect.

[PR19_Kit]

But is scale weight a linear conversion? I suspect not, as it's volume and density based.

[Old Wombat]

But is scale weight a linear conversion? I suspect not, as it's volume and density based.

Very much non-linear!

Assuming you are using the same materials, then weight (mass) varies as the cube of the scale, so;

if you double the size, then; m₁ = m₀ x 2³ = 8 x m₀

if you halve the size, then; m₁ = m₀ x (1/2)³ = (1/2³) m₀  = (1/8)m₀

Where m₀ is the mass of the original object & m₁ is the scale mass of the object.

Therefore, the scale mass of the Roberts would be (1/350³) x 7,973 tons (Standard) & a scale ton would be  (1/350³) x 1,016.047 kg or 2,240 lb


The mass of a scale Roberts comes in at almost 190 grams, by the way. 

[scooter]

But is scale weight a linear conversion? I suspect not, as it's volume and density based.

Very much non-linear!

Assuming you are using the same materials, then weight (mass) varies as the cube of the scale, so;

if you double the size, then; m₁ = m₀ x 2³ = 8 x m₀

if you halve the size, then; m₁ = m₀ x (1/2)³ = (1/2³) m₀  = (1/8)m₀

Where m₀ is the mass of the original object & m₁ is the scale mass of the object.

Therefore, the scale mass of the Roberts would be (1/350³) x 7,973 tons (Standard) & a scale ton would be  (1/350³) x 1,016.047 kg or 2,240 lb


The mass of a scale Roberts comes in at almost 190 grams, by the way. 

*twitches in Political Science*

[jcf]

You cannot view this attachment.
HMS Furious single 18in Mk I mounting.
The turret was an adaptation of the twin 15in Mk I mounting used on various
classes of battleships, battlecruisers and the monitor classes Marshal Soult,
Erebus & Roberts.

You cannot view this attachment.
18in as mounted on HMS Lord Clive & HMS General Wolfe, basically a
modified shore defense carriage.


"The original Mk I mounting had a revolving weight of 825.15 tons, with 9in KNC
face and sides and 5 in roof. By way of contrast, the Mk I CD mounting weighed
384 tons without Cordite tanks, including 43 tons of foundations and 24 tons of
fixed ½in shield."


"The post-war EOC drawing of a twin 18in/40 turret, produced as part of the post-war
battle-cruiser design process, showed a total of 1385 tons for a twin mounting, including
the two 146-ton guns. Inside barbette diameter would have been 37ft 3in (handling
room diameter would have been 30ft 3in, and roller path diameter 33ft). Working
circle (from centre of turret to end of gun) would have been 53ft, and the turret would
have extended 28ft aft from its centre. Gun centres would have been 5ft 3in apart."

Info and images from Naval Weapons of World War One, Friedman.