Matrix Games Forums

Forums  Register  Login  Photo Gallery  Member List  Search  Calendars  FAQ 

My Profile  Inbox  Address Book  My Subscription  My Forums  Log Out

Vehicle acceleration

View related threads: (in this forum | in all forums)

Logged in as: Guest
Users viewing this topic: none
  Printable Version
All Forums >> [New Releases from Matrix Games] >> Armored Brigade >> Vehicle acceleration Page: [1]
Message << Older Topic   Newer Topic >>
Vehicle acceleration - 8/30/2018 1:12:17 PM   

Posts: 608
Joined: 2/24/2017
Status: offline
I am collecting any available acceleration value, primarily for tanks, but also for any other vehicle (es. M113, BTRs etc.). It is essential to provide the source, and to take care of variants (where possible) as there might be a significant variation in weight, transmissions etc.

We will be using the constant acceleration formula, so we can have a basis for the calculation. In this formula, "t" represents time, "v0" represents initial velocity and "v1" represents final velocity. Change in velocity is divided by the time in order to calculate the acceleration in units of velocity per time.

a = (v1 - v0) / t

For tanks it is common to list 0 to 32 km/h (or 20 miles per hour), and 0 to 100km/h for faster vehicles.

Leopard 2 Main Battle Tank 1979–98 by Michael Jerchel for example gives 6 seconds for Leopard 2A4 as time necessary to reach 32km/h. Hence the acceleration will be:

> a = (32 km/h - 0 km/h) / 6 sec
> 5.33 km/h 
> 5.33 km  
       (h x sec)

That means that on average, the velocity increases by 5.33 kilometers per hour for every second that passes. Note that when writing the units in the equation, "kilometers per hour, per second" is simplified to "km / (h x sec)."

Now we need to convert that to m/s^s as used by game. Hence:

5.33 km (1000 m/km)
      h (3,600 sec/h) x sec
Which gives us the final value of 1,48 m/s^2 instead of generic 2 m/s^2 as currently used for all units.
Post #: 1
RE: Vehicle acceleration - 8/31/2018 9:03:49 PM   

Posts: 608
Joined: 2/24/2017
Status: offline
I have an issue. I gathered 0-60 km/h acceleration for BTR-60 and BRDM-2 from respectively Muromteplovoz zavod and Techimpex Ltd. modernization prospects. Time values are listed as 83 seconds and 60 seconds.

Such long time intervals give constant acceleration value of meager 0,2 and 0,27 m/s^2. Now, there is this Youtube video showing BRDM-2 allegedly accelerating from 0 to 100 km/h, and it indeed seem to require more than minute to do so. However, such video is anything but scientific.

Since I am not either an automotive engineer nor physicist, can somebody chime in and say me if it is even possible to compare different speed/time intervals like I did? Can constant acceleration formula be even used, or is acceleration gear/speed dependent in practical terms?

(in reply to nikolas93TS)
Post #: 2
RE: Vehicle acceleration - 9/2/2018 12:01:58 PM   

Posts: 608
Joined: 2/24/2017
Status: offline

Attachment (1)

< Message edited by nikolas93TS -- 9/2/2018 12:16:58 PM >

(in reply to nikolas93TS)
Post #: 3
Page:   [1]
All Forums >> [New Releases from Matrix Games] >> Armored Brigade >> Vehicle acceleration Page: [1]
Jump to:

New Messages No New Messages
Hot Topic w/ New Messages Hot Topic w/o New Messages
Locked w/ New Messages Locked w/o New Messages
 Post New Thread
 Reply to Message
 Post New Poll
 Submit Vote
 Delete My Own Post
 Delete My Own Thread
 Rate Posts

Forum Software © ASPPlayground.NET Advanced Edition 2.4.5 ANSI