# Underlying mechanics of vehicles

**URL:** <https://discourse.cataclysmdda.org/t/underlying-mechanics-of-vehicles/7572>\
**Category:** The Bunker\
**Created:** [October 14, 2014, 4:02am UTC](https://discourse.cataclysmdda.org/t/underlying-mechanics-of-vehicles/7572 "2014-10-14T04:02:32Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Murphy](https://sea2.discourse-cdn.com/flex016/user_avatar/discourse.cataclysmdda.org/murphy/32/2371_2.png) [@Murphy](https://discourse.cataclysmdda.org/u/Murphy)\
**Post date:** [October 14, 2014, 4:02am UTC](https://discourse.cataclysmdda.org/t/underlying-mechanics-of-vehicles/7572/1 "2014-10-14T04:02:32Z")

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I don’t know what “K dynamics” means, but here are some quirky observations I made.  
Top speed of a vehicle seems to be only affected by:

[ul][li]drive power, obviously – the more, the better[/li]  
[li]number/size of wheels – more and larger wheels will slow you down[/li]  
[li]vehicle size – but only width seems to be taken into account[/li]  
[li]vehicle mass – but only a little if at all[/li]  
[li]driving over piles of rocks/metal wreckage (the speedometer will not show it tho)[/li][/ul]

Also, two and more engines will have diminishing returns, to the point where installing an additional weak engine will actually lower your top speed. There goes my plan of installing a secondary gasoline engine just to be able to recharge batteries in times of power scarcity. (It would be nice to have a non-engine epower generator, for this reason.)

Is there anything I am obviously missing?  
And what is “K dynamics”?

EDIT: Ohhh, I did a forum search and it yielded some useful info, whereas it did not when I did it previously.  
K Dynamics is friction coefficient which is calculated from your vehicle configuration (including width, amount of wheels and I would guess windshields). K Mass is how much the vehicle mass will slow it down. Both values are ideal at 100%, worst at 0%.

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**Author:** ![Coolthulhu](https://sea2.discourse-cdn.com/flex016/user_avatar/discourse.cataclysmdda.org/coolthulhu/32/2446_2.png) [@Coolthulhu](https://discourse.cataclysmdda.org/u/Coolthulhu)\
**Post date:** [October 14, 2014, 5:15am UTC](https://discourse.cataclysmdda.org/t/underlying-mechanics-of-vehicles/7572/2 "2014-10-14T05:15:32Z")

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> [@Murphy](#):
>
> Also, two and more engines will have diminishing returns, to the point where installing an additional weak engine will actually lower your top speed. There goes my plan of installing a secondary gasoline engine just to be able to recharge batteries in times of power scarcity. (It would be nice to have a non-engine epower generator, for this reason.)

Separate engine activation is in plans. Also, you can selectively activate engines by not having enough fuel for some of them.

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**Author:** ![Blaze](https://avatars.discourse-cdn.com/v4/letter/b/e274bd/32.png) [@Blaze](https://discourse.cataclysmdda.org/u/Blaze)\
**Post date:** [October 14, 2014, 5:26am UTC](https://discourse.cataclysmdda.org/t/underlying-mechanics-of-vehicles/7572/3 "2014-10-14T05:26:08Z")

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With the addition of Jumper Cables, external power stations and solar farms are a lot less hassle to deal with.

Carry around the parts and assemble as needed.

I can probably throw together a foldable generator easily too.