Since many players ask why "morerealistic" tractors are so slow, especially when "carting" on road, here is a little topic to put all the data to understand that :
Please reply to this topic if you think something is wrong regarding speed, in that case, please provide :
- which tractor
- which trailer
- which "fillType" and how many liters in the trailer
- which map and which road
Best thing to do is to give another try on Hagensted with default "mr" equipment to see if the problem does not come from your mods and also, so that we could reproduce the problem by ourselves to check that for you.
So, the main reason why people think the tractors are too slow is the road slope gradient on most map.
Due to the base game physic, most road are very steep so that the tractor slow down a little.
But with "morerealistic" tractors, you don't have to get a 30% slope to slow down the vehicle : force and gravity are applied realistically, and so, the speed will be right according to the tractor power and the gravity force to counteract depending to the slope and the total mass to move.
On Hagensted, for example, most hilly roads are between 20 and 30% gradient.
This is really steep and most of you will never see such steep road in their entire life.
A very steep highway is under 10%
And other steep roads are no more than 15-20% most of the time.
Another point is that in the game, we can't feel the gravity like in reality. And so, especially when playing in 3rd person view, we can't imagine how steep a slope is.
Here are some "visual" examples so that you can understand better what is a "steep" road :
1. look at 1:35, the truck is at more than 80% engine power, and the speed is less than 10kph.
Like in the game, we don't realize how steep the slope is here.
If you look this video entirely, You would also hear that the car has to go uphill in first gear and can't gear up until it reaches the top.http://www.youtube.com/watch?v=NoWb3GnrpFk
2. On this video, trucker has to go "pedal to the metal", because he is not driving on a "concrete/asphalt" road : if the truck stops, it is stuck and need to be towed.
Of course, we are not talking of a weak 300Hp farming tractor with a CVT "low efficiency" gearbox here
Like you can see, the speed is under 20kph at the worst part.http://www.youtube.com/watch?v=Z0Fkg-EGOz0
3. same as previous one. Look at 01:10 or at 11:00 for example.http://www.youtube.com/watch?v=KB8vhm2stu0
4. another one :http://www.youtube.com/watch?v=yi5HKBJ7QXc
5. On this "famous" video, we don't mind who is the first (especially when considering they climb the road at the same speed, only the start give some meters to the John Deere)
But this is rather interesting to see at which speed they climb, when noting there is "only" 20T in each trailer (something like 41T total moving mass)
The slope seems to be less than 10% when trying to measure it with "paint.net" for example. (difficult here to get something precise since there is no real "side screenshot")
And the speed around 20kph.
If the test was conducted on a "Hagenstedt" road, the tractors would go slower by a factor of 2-3 (we could follow them without a car)http://www.youtube.com/watch?v=5xu7aA178D8
6. On this video, we can see a "real" truck pulling at less than 40kph on a highway going uphill. The description says the load is 78,000Lbs, that is to say about 35 metric tons.
as in the game, the slope seems pretty "flat". (surely something under 10% since this is a highway)http://www.youtube.com/watch?v=SKtUehbh3pM
7. This one is better situated and we know the slope is no more than 8% at the worst part.
If you look at 18:00, you can see the truck goes under 40kph too. (That would mean less than 12kph on Hagensted, provided the truck does not lose traction)http://www.youtube.com/watch?v=NGP8C-ghAn0
8. The mighty 1455 going uphill (as usual, this is very hard to estimate the slope, and it seems this is only a very light slope from our chair. But at the worst part, we could follow the tractor "walking")1455 XL:Dt 402 frôle la zone rouge
9. last but not least. This is not a video, but a report with precise data.
And for those that don't want to read all the report, just look at the "figure 9", page 18 : you could see that the tractor goes under 15kph on some slope.
This is also interesting to say we are talking of 240+ Hp tractor with only 18 metric Ton on the back (trailer + load), which is pretty "light" for such tractors. (in my country, a 240Hp tractor commonly pull a 24T trailer fully loaded = at least 36T, but of course, we are not driving at 50-60kph)http://www.deere.fr/fr_FR/docs/news_and_media/Abschlussbericht_Landwirtschaftskammer_SH_ENG.pdf
So, with all this example and data, I hope you understand better why a 300Hp farming tractor can't go uphill at 30kph towing 40T on a 20% gradient road.
EDIT : some in-game test = http://www.youtube.com/watch?v=VGsDNWqHnE4