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Challenger 2 tank treads becomes high centered on Altis small rock walls, feels slow and very sluggish and underpowered for its Power to weight ratio.
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The challenger Tank treads will go thru the small rock walls and the tank will be become high centered, becoming stuck there in position. The treads seem to clip thru. I dont know if this tank had its tracks updated to the tank DLC updated PhysX libraries.

Also it feels very sluggish, slow and under powered even though it has basically the same power to weight ratio and top speed as a T-72 IRL. (according to Wikipedia anyway.)

https://forums.bohemia.net/forums/topic/140837-development-branch-changelog/?page=45&tab=comments#comment-3233279

https://forums.bohemia.net/forums/topic/211039-tanks-tracked-vehicles-driving-and-handling/

Challenger 2
Engine Perkins CV12-6A V12 diesel 26.1 litre
1,200 bhp (890 kW)
Power/weight 19.2 hp/t (14.3 kW/t) at 62.5t, 16.0 hp/t (11.9 kW/t) at 75.0t.
Speed 59 km/h (37 mph)

T72
Engine V-12 diesel
V-92S2F (T-72B3 & T-72B3M)
780 hp (580 kW)
1,130 hp (840 kW) for V-92S2F
Power/weight 18.8 hp/tonne (14 kW/tonne)
Speed 60 km/h (37 mph)

Details

Affected classnames
Challenger 2
Branch
Release/Stable
Apollo created this task.Mar 26 2019, 10:07 AM
Freddo3000 changed the task status from Needs Review to Open.Mar 11 2020, 11:34 AM
Freddo3000 triaged this task as Normal priority.
Preywinder added a subscriber: Preywinder.EditedThu, Sep 8, 9:51 AM

I would also like to add that there is a definite power issue with tanks when traversing anything that isn't flat ground. Not sure if this is an Arma-ism or something that can be solved through the CUP mods.

Presumably it's similar for other tanks (though I've not seen/experienced many other tanks in motion) but I can confirm that CH2 can and will climb a 30 degree incline at almost full speed in real life. In Arma 3, if I'm hitting 67kph on roads and 42kph on rough terrain, when going up a hill I would expect to still be doing at least half that speed, but everything grinds to a painful halt to the point where you're not sure if you will even make it to the top.

I ran a small experiment and other tanks are affected by this, but CH2 is definitely suffering the worst due to its lower top speed.

The experiment was as follows:

  1. Tank starts positioned on flat ground with a moderate incline/hill just up ahead.
  2. No roads/tarmac, so this is all off-road.
  3. All 3 of the tanks listed below followed the exact same route (one at a time of course).

Results:

  • Leopard 2 = 45kph on the flat, reduced to 10kph on the hill. Took 45 seconds to reach the summit.
  • M1A2 Abrams = 45kph on the flat, reduced to 10kph on the hill. Took 46 seconds to reach the summit.
  • Challenger 2 = 32kph on the flat, failed to climb the hill on first attempt, reduced to 4kph on second attempt. Took 1m20s to reach the summit.

The hill used wasn't particularly steep or challenging to look at, from memory roughly 20-30 degree incline; Not a hill I would normally choose to avoid if I was planning my angle of attack with an armoured troop/squadron.

Admittedly Top Gear was made for its entertainment value, but you can see how agile the CH2 is on just about any terrain in this clip. It's also a fun watch. The Range Rover sport isn't bad, either:
https://www.youtube.com/watch?v=-wKfpPrRVIo

RWxY playing with CH2 back in 2014, couple of cheeky hill climbs. Worth noting that the drop of speed just before going over the edge of a knife-edge is the drivers doing - Flying off the top of one of those at max throttle tends to rattle the crew around a bit.
https://www.youtube.com/watch?v=38KcacKFi8A

Final point and slightly off topic... Smoke generators for CH2 when? :)