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Offline Thewolf  
#1 Posted : 28 September 2019 22:07:05(UTC)
Thewolf

Canada   
Joined: 08/09/2015(UTC)
Posts: 2,035
Location: Saint Mathias dur Richelieu-Canada
Hi guys Cool

I started calibrating the speeds of my locomotives with Itrain. It's a long time and I don't have time. I have to think about preparing the move.

I thought about cheating to go faster Cool

Here is what I intend to do :

- at step 126, enter the maximum locomotive speed forward and backward

- in step 1, enter the minimum speed at the start, i.e. 1 km/h

- proceed with the application

Itrain calculates the speed curve and a beautiful diagram emerges.

It's very fast

Is this valid? Is that correct? I wonder about the question

Thank you guys Cool

Thewolf

Edited by user 29 September 2019 14:11:35(UTC)  | Reason: Not specified

Project The Richelieu Valley Railway-CS2-Track C- Itrain-Digital
Offline Goofy  
#2 Posted : 29 September 2019 15:11:20(UTC)
Goofy


Joined: 12/08/2006(UTC)
Posts: 8,993
Depends the speed to simulate like the prototype.
If you have 28 speed steps in the decoder it makes also difference from 126 speed steps.
For example...a shunting diesel locomotive V60 do have maximum 60 km/h so try to set difference between 28 and 126 speed steps in the layout and check what it feels good for you.
H0
DCC = Digital Command Control
Offline Thewolf  
#3 Posted : 29 September 2019 15:13:01(UTC)
Thewolf

Canada   
Joined: 08/09/2015(UTC)
Posts: 2,035
Location: Saint Mathias dur Richelieu-Canada
Each locomotive has its own speed curve.

By proceeding in this way, all locomotives will have the same speed curve, i.e. straight ahead.

I give up the idea

Thewolf
Project The Richelieu Valley Railway-CS2-Track C- Itrain-Digital
Offline costing  
#4 Posted : 29 September 2019 15:16:06(UTC)
costing

Switzerland   
Joined: 20/08/2018(UTC)
Posts: 157
Location: Geneve, Geneva
Something I've done in order to match speeds of two locos was to switch from log to linear curves. Then it was only a question of setting Vstart (CV 5) to 1 (or higher if the loco doesn't start moving at the smallest speed step) and Vhigh (CV 2) to values that yield the same top speed for both, equal to the scale top speed of the prototype. Don't know about ltrain but JMRI makes it very easy to adjust all intermediate speed steps with a click of a button.

Leave the locos running for a while, the top speed changes as they warm up so fine-tune CV 2 on the main to get the desired top speed.

Cheers,

.costin
JMRI on RPi & DCC++ / C-track / Marklin, Roco, ESU, Bemo locos / Christmas car collector
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