SUBSIM Radio Room Forums



SUBSIM: The Web's #1 resource for all submarine & naval simulations since 1997

Go Back   SUBSIM Radio Room Forums > Silent Hunter 3 - 4 - 5 > Silent Hunter III
Forget password? Reset here

Reply
 
Thread Tools Display Modes
Old 04-27-11, 05:38 PM   #1
reignofdeath
Stowaway
 
Posts: n/a
Downloads:
Uploads:
Default A Simple Helpful Calculation for you all

So I'm almost 90% sure this is right because I've even run tests on it to clarify its accuracy which you can usually get within a few seconds depending on distance. But I've come up with a calculation on how many real minutes it would take to reach a place in time compression.

First what you need, are your waypoints, plot them, then set time to x1 and read the end waypoints time, lets say 96:15 which is 96 hours and 15 minutes.

Next, take 96 and multiply by 60 (minutes in an hour) to get 5760 (total minutes in 96 hours) then add 15 (the leftover) to get 5775 (Total minutes for the whole trip)

Now take whatever TC you want to run it at, and divide by that, lets say 512 to get 11.279296 Minutes.

Now if you want to get real precise, take 60(seconds in a minute) and multiply .279296 to get 16.75776 seconds. So your trip of 96 hours and 15 minutes at 1x time compression would take 11 minute and 16 seconds at 512.

So the equation would look like this, [ h x 60 + l(m)]/ 512 = t(m)

where h= hours, l(m)= leftover minutes, the remainder if you will, and t(m.a.c.) = trip in minutes at compression.

If you don't understand why this equation works look below

Another way to look at it would be a ratio such as (using the same variables)

512tc------|----- 5775 Minutes-----|----11.279296 minutes
_______ = ___________ = __________

a-----------|-------- 1 tc----------|-------1a

The tc in the top left and tc in the bottom right cancel out and leave you with minutes on top, over 1a

So yeah, I had always wondered for a way to calculate that but never realized it until I had a duh moment and remembered math. When I say I tested it I mean in the case of those numbers there, I got 11 minutes and 16 seconds at 512 tc for a 96 hour 15 minute trip at 1 tc. So I took a stop watch, started it and stopped it once I reached my destination my time?? 11 minutes, 20 seconds (No stops from ships, just slight mathematical error somewhere due to my laziness) then I ran it again on a shorter distance and a longer one and was a little under a few seconds off either way.

So then I thought I'd post this up here for you all, hope this is a useful tool for any of you who would like to know that number and are pressed for time

Casey

Last edited by reignofdeath; 04-28-11 at 04:55 AM.
  Reply With Quote
Old 04-27-11, 05:55 PM   #2
Fish In The Water
Prince of
the Sea


SUBSIM
Welcome
Committee

 
Join Date: Jul 2009
Location: Watching over U-253
Posts: 3,527
Downloads: 98
Uploads: 2
Default

Quote:
Originally Posted by USNSRCaseySmith View Post
So the equation would look like this, [ h x 60 ] + l(m)/ 512 = t(m)
Easy on the math, you're making my head hurt...



Just kidding, thanks for the post!
Fish In The Water is offline   Reply With Quote
Old 04-27-11, 06:43 PM   #3
Salvadoreno
Grey Wolf
 
Join Date: May 2005
Posts: 887
Downloads: 119
Uploads: 0
Default

Quote:
Originally Posted by Fish In The Water View Post
Easy on the math, you're making my head hurt...



Just kidding, thanks for the post!

<-----me trying to figure out what u just said.

Hehe nice discovery tho!
__________________
Salvadoreno is offline   Reply With Quote
Old 04-27-11, 06:48 PM   #4
reignofdeath
Stowaway
 
Posts: n/a
Downloads:
Uploads:
Default

Quote:
Originally Posted by Salvadoreno View Post
<-----me trying to figure out what u just said.

Hehe nice discovery tho!
I could walk you through it if you like?? Lol
  Reply With Quote
Old 04-27-11, 07:19 PM   #5
Lord_magerius
Seasoned Skipper
 
Join Date: Apr 2010
Location: Right by the hydrophone station
Posts: 724
Downloads: 96
Uploads: 0
Default

To quote the philosopher Bernard Black
"I can feel bits of my brain falling away like a wet cake"
__________________
Lord_magerius is offline   Reply With Quote
Old 04-27-11, 08:00 PM   #6
Missing Name
Seasoned Skipper
 
Join Date: Oct 2010
Location: Westun New Yahk
Posts: 748
Downloads: 131
Uploads: 0
Default

I actually do mental approximations for this. "Do I have enough time to eat? Lemme see... it'll be about fifteen minutes to cross the Atlantic. Yeah, sounds good."
__________________
Largest target sunk with deck gun: Japanese auxiliary cruiser, 15000 tons
Largest engaged: HMS Nelson. Results inconclusive.



Read Brag's stuff
Missing Name is offline   Reply With Quote
Old 04-27-11, 08:21 PM   #7
reignofdeath
Stowaway
 
Posts: n/a
Downloads:
Uploads:
Default

Quote:
Originally Posted by Lord_magerius View Post
To quote the philosopher Bernard Black
"I can feel bits of my brain falling away like a wet cake"
Basically. to find out how much time it will take you to travel say 100 hours in a time compression of say 1024x you take 100 hours times 60 (Because you have to convert it to minutes because that is what your end answer will be) and divide by 1024 (Because the x at the end of 1024 means multiply, so all time compression does is multiply the speed at which time passes by that much) and your answer is in minutes of how long it takes you to travel 100 hours of in game travel time at a tc of 1024.

I know when i used the equation that was confusing but let me try to make it simpler. (h x 60) + however minutes leftover (I.e. 10:16 = 10 hours and 16 mins, so add 16 minutes) then divide that by whatever time compression your using to get how many minutes it will take you in RL to travel that distance (Say 10 hours 16 minutes as in I.e.) at a whatever time compression you choose. Sorry if I wrote it that confusing guys. I just thought thats how it would make the most sense If you don't understand it ask me why and I'll help guide you through the bit you don't understand.
  Reply With Quote
Old 04-27-11, 11:59 PM   #8
VONHARRIS
Konteradmiral
 
Join Date: Apr 2010
Location: Greece
Posts: 1,992
Downloads: 300
Uploads: 0
Default

Quote:
Originally Posted by USNSRCaseySmith View Post
So the equation would look like this, [ h x 60 ] + l(m)/ 512 = t(m)

where h= hours, l(m)= leftover minutes, the remainder if you will, and t(m.a.c.) = trip in minutes at compression.


Casey
Sorry for that but the correct form of the equation is:
(h x 60 + l )/512 = t

The way you have written it , only the variable l will be divided by 512 and not the whole factor hx60 + l
This is why the bracket is required.
Example :
If h=96 and l=15 , as in your example , then your equation gives the following results:

96x60 + 15/512 = t
5760 + 0.02929 = t
5760.02929 = t which is wrong

Now :
(h x 60 + l )/512 = t
(96 x 60 + 15)/512 = t
(5760 + 15)/512 = t
5775/512 = t
11.279 = t

It is obvious that your calculations are correct but you have miswritten the equation.
I couldn't help it , I teach math!
Sorry again.
VONHARRIS is offline   Reply With Quote
Old 04-28-11, 04:57 AM   #9
reignofdeath
Stowaway
 
Posts: n/a
Downloads:
Uploads:
Default

Quote:
Originally Posted by VONHARRIS View Post
Sorry for that but the correct form of the equation is:
(h x 60 + l )/512 = t

The way you have written it , only the variable l will be divided by 512 and not the whole factor hx60 + l
This is why the bracket is required.
Example :
If h=96 and l=15 , as in your example , then your equation gives the following results:

96x60 + 15/512 = t
5760 + 0.02929 = t
5760.02929 = t which is wrong

Now :
(h x 60 + l )/512 = t
(96 x 60 + 15)/512 = t
(5760 + 15)/512 = t
5775/512 = t
11.279 = t

It is obvious that your calculations are correct but you have miswritten the equation.
I couldn't help it , I teach math!
Sorry again.
haha thats okay! I appreciate the help there and it is fixed I also kept the l(m) and t(m) to make it look a bit cooler (m standing for minutes) even though a variable with a variable underscore or whatever you like to call it is used for more complex equations if I remember right. I cant believe I forgot that though, a basic rule of math haha. Thanks Von Harris!
  Reply With Quote
Old 04-28-11, 05:20 AM   #10
desirableroasted
Grey Wolf
 
Join Date: Feb 2006
Location: In the mountains, now. On the edge of the sea before.
Posts: 933
Downloads: 47
Uploads: 0
Default

Quote:
Originally Posted by USNSRCaseySmith View Post
haha thats okay! I appreciate the help there and it is fixed I also kept the l(m) and t(m) to make it look a bit cooler (m standing for minutes) even though a variable with a variable underscore or whatever you like to call it is used for more complex equations if I remember right. I cant believe I forgot that though, a basic rule of math haha. Thanks Von Harris!
(h/tc)*60 is quite fast, and ends up (in your example) under two seconds different from your equation. (96/512)*60= 11.25 minutes. Certainly, your equation is more exact, but (h/tc)*60 takes 4 seconds on the calculator.
__________________
"Well, now, that's true... the IXC is a bit of a chick magnet..but you really can't beat the VIIB for off-road fun."
desirableroasted is offline   Reply With Quote
Old 04-28-11, 05:42 AM   #11
Jimbuna
Chief of the Boat
 
Jimbuna's Avatar
 
Join Date: Feb 2006
Location: 250 metres below the surface
Posts: 190,473
Downloads: 63
Uploads: 13


Default

Quote:
Originally Posted by desirableroasted View Post
(h/tc)*60 is quite fast, and ends up (in your example) under two seconds different from your equation. (96/512)*60= 11.25 minutes. Certainly, your equation is more exact, but (h/tc)*60 takes 4 seconds on the calculator.
Aye that...otherwise by the time I completed the calculation the result would be different to the current time/position....might even have arrived at the final waypoint
__________________
Wise men speak because they have something to say; Fools because they have to say something.
Oh my God, not again!!

Jimbuna is offline   Reply With Quote
Old 04-28-11, 11:44 AM   #12
Sailor Steve
Eternal Patrol
 
Sailor Steve's Avatar
 
Join Date: Nov 2002
Location: High in the mountains of Utah
Posts: 50,369
Downloads: 745
Uploads: 249


Default

Interesting how different minds work. This is not something I've ever wondered about. I guess I'm with Missing Name on this - I listen to the music and enjoy the ride. It takes as long as it takes.
__________________
“Never do anything you can't take back.”
—Rocky Russo
Sailor Steve is offline   Reply With Quote
Old 04-28-11, 03:47 PM   #13
reignofdeath
Stowaway
 
Posts: n/a
Downloads:
Uploads:
Default

Quote:
Originally Posted by jimbuna View Post
Aye that...otherwise by the time I completed the calculation the result would be different to the current time/position....might even have arrived at the final waypoint
now I feel like I didnt help anyone
  Reply With Quote
Old 04-28-11, 03:29 PM   #14
reignofdeath
Stowaway
 
Posts: n/a
Downloads:
Uploads:
Default

Quote:
Originally Posted by desirableroasted View Post
(h/tc)*60 is quite fast, and ends up (in your example) under two seconds different from your equation. (96/512)*60= 11.25 minutes. Certainly, your equation is more exact, but (h/tc)*60 takes 4 seconds on the calculator.
Yeah I know, but Im pretty anal about converting it all to minutes instead of 96.xxx hours I dont know why?
  Reply With Quote
Old 04-29-11, 10:37 AM   #15
desirableroasted
Grey Wolf
 
Join Date: Feb 2006
Location: In the mountains, now. On the edge of the sea before.
Posts: 933
Downloads: 47
Uploads: 0
Default

Quote:
Originally Posted by USNSRCaseySmith View Post
Yeah I know, but Im pretty anal about converting it all to minutes instead of 96.xxx hours I dont know why?
Yeah, took me awhile to visualize it. Funny, we are all ok when told a 100-meter dash took 10.45 seconds, but are befuddled when told a marathon took 2.45 hours.
__________________
"Well, now, that's true... the IXC is a bit of a chick magnet..but you really can't beat the VIIB for off-road fun."
desirableroasted is offline   Reply With Quote
Reply


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 07:51 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Copyright © 1995- 2025 Subsim®
"Subsim" is a registered trademark, all rights reserved.