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LittleWhiteMouse

Colorado's turning radius is a lie!

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DRAMATIC TITLE!

Seriously, though, Colorado's turning radius in port of 640m isn't accurate.  It's closer to 710m.  Like the British destroyers before her, her increased engine power in a turn has messed up the value found in port.  Normally, a battleship loses about 25% of their maximum speed in a turn.  Wargaming appears to use this slowed-down value to calculate what the ship's turning radius in port should be.  When Colorado got her engine speed in a turn buffed (she only loses 9%), this changes the ship's actual turning radius. This holds true for other ships which deviate from the norm of their ship type.  The British cruisers are also guilty of this.  I'll find the others eventually as I continue to add more and more ships to my twirling database.

A special thanks to @Lert for helping me twirl boats to discover this.  The math works out too:

Ship Name

Engine
Setting

Speed Turning
Speed
% of Max 360º
Turn Time
Rotation
Rate
Port
Radius
Calculated
Radius
West Virginia 4/4 21.1kts 15.9kts 75.4% 98.8 seconds 3.6º/s 670m 671.4m
Colorado 4/4 21.1kts 19.2kts 91.0% 86.9 seconds 4.1º/s 640m 713.1m

Distance Compression Ratio: 5.22x
Knots to Meters per Second conversion:  1.943844

All of this information has gotten packaged off to Wargaming.

BkxbJ6K.gif
The twirling test.  One battleship with a known turning radius follows the other.  Once we reach one of the nav buoys, the ship puts their rudder hard over and I take overhead screenshots to plot their turning radii.  This is Lert in Colorado leading and me following along in West Virginia 1941.

SfsEn8a.jpg
Each screenshot is then layered in photoshop and a dot is placed on the tip of the bow for every frame of animation.  Colorado in red, West Virginia in teal.

4f1E4ZP.jpg
Circles drawn.

E0eH0tQ.gif
Circles compared.

Edited by LittleWhiteMouse
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The numbers don't really matter to me. 640 or 710, I still remember her as being fairly maneuverable for a cast-iron battle tub.

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There are lies and deceit that lurk in WGs heart....but the LWM knooooowwwws! (the Shadow Knows)

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That last image makes me think of Ringu.  Am i going to die now?

 

Edit: on topic turning circle comment, insert here.  

Edited by Hatework

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35 minutes ago, Hatework said:

Am i going to die now?

Everybody dies.

SoSSeY8.jpg

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1 minute ago, landcollector said:

@LittleWhiteMouse

You mentioned in your WV41 review that New Mexico shares Colorado's speed retention characteristics.  Does this mean that New Mexico's displayed turn radius of 640m is also wrong?

Probably.  I haven't twirled her in over a year.  I'd have to look.

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1 hour ago, Morpheous said:

There are lies and deceit that lurk in WGs heart....but the LWM knooooowwwws! (the Shadow Knows)

MWAHAHAHAHAHAAAAH!!!

Edited by Cruiser_SanJuan

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1 minute ago, Vengeance said:

For once the mouse chases the cat

She does that more often than people think.

Aaaaaaaaand, fan ship, go!

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