diff --git a/editoast/src/core/simulation.rs b/editoast/src/core/simulation.rs
index 84f6567f54a..d0bb96d0248 100644
--- a/editoast/src/core/simulation.rs
+++ b/editoast/src/core/simulation.rs
@@ -82,6 +82,11 @@ pub struct PhysicsConsistParameters {
 }
 
 impl PhysicsConsistParameters {
+    pub fn set_traction_engine(mut self, traction_engine: RollingStock) -> Self {
+        self.traction_engine = traction_engine;
+        self
+    }
+
     pub fn with_traction_engine(traction_engine: RollingStock) -> Self {
         PhysicsConsistParameters {
             max_speed: None,
diff --git a/editoast/src/views/timetable.rs b/editoast/src/views/timetable.rs
index 49e49c54622..9866c515636 100644
--- a/editoast/src/views/timetable.rs
+++ b/editoast/src/views/timetable.rs
@@ -317,6 +317,7 @@ async fn conflicts(
         &trains,
         &infra,
         electrical_profile_set_id,
+        None,
     )
     .await?;
 
diff --git a/editoast/src/views/timetable/stdcm.rs b/editoast/src/views/timetable/stdcm.rs
index f92a64d75b8..5a900adce63 100644
--- a/editoast/src/views/timetable/stdcm.rs
+++ b/editoast/src/views/timetable/stdcm.rs
@@ -234,6 +234,14 @@ async fn stdcm(
             None
         };
 
+    let physics_consist_parameters = PhysicsConsistParameters {
+        max_speed: stdcm_request.max_speed,
+        total_length: stdcm_request.total_length,
+        total_mass: stdcm_request.total_mass,
+        towed_rolling_stock: towed_rolling_stock.map(From::from),
+        traction_engine: rolling_stock.clone().into(),
+    };
+
     let simulations = train_simulation_batch(
         conn,
         valkey_client.clone(),
@@ -241,6 +249,7 @@ async fn stdcm(
         &train_schedules,
         &infra,
         stdcm_request.electrical_profile_set_id,
+        Some(physics_consist_parameters.clone()),
     )
     .await?;
 
@@ -259,6 +268,7 @@ async fn stdcm(
         &infra,
         &rolling_stock,
         timetable_id,
+        Some(physics_consist_parameters.clone()), // TODO maybe passe by ref
     )
     .await?;
     let simulation_run_time = match simulation_run_time {
@@ -345,14 +355,7 @@ async fn stdcm(
             latest_simulation_end,
         ),
         temporary_speed_limits,
-        rolling_stock: PhysicsConsistParameters {
-            max_speed: stdcm_request.max_speed,
-            total_length: stdcm_request.total_length,
-            total_mass: stdcm_request.total_mass,
-            towed_rolling_stock: towed_rolling_stock.map(From::from),
-            traction_engine: rolling_stock.into(),
-        }
-        .into(),
+        rolling_stock: physics_consist_parameters.into(),
     };
 
     let stdcm_response = stdcm_request.fetch(core_client.as_ref()).await?;
@@ -605,10 +608,11 @@ async fn simulate_train_run(
     db_pool: Arc<DbConnectionPoolV2>,
     valkey_client: Arc<ValkeyClient>,
     core_client: Arc<CoreClient>,
-    data: &STDCMRequestPayload,
+    data: &STDCMRequestPayload, // TODO build PhysicsConsistParameters from this
     infra: &Infra,
-    rolling_stock: &RollingStockModel,
+    rolling_stock: &RollingStockModel, // TODO remove it (maybe remplace it with towed)
     timetable_id: i64,
+    physics_consist_parameters: Option<PhysicsConsistParameters>,
 ) -> Result<(
     SimulationTimeResult,
     TrainSchedule,
@@ -653,6 +657,7 @@ async fn simulate_train_run(
         train_schedule.clone(),
         infra,
         None,
+        physics_consist_parameters,
     )
     .await?;
 
diff --git a/editoast/src/views/train_schedule.rs b/editoast/src/views/train_schedule.rs
index 7946ad98a81..51e766d8a73 100644
--- a/editoast/src/views/train_schedule.rs
+++ b/editoast/src/views/train_schedule.rs
@@ -366,6 +366,7 @@ async fn simulation(
             train_schedule,
             &infra,
             electrical_profile_set_id,
+            None,
         )
         .await?
         .0,
@@ -380,6 +381,7 @@ pub async fn train_simulation(
     train_schedule: TrainSchedule,
     infra: &Infra,
     electrical_profile_set_id: Option<i64>,
+    physics_consist_parameters: Option<PhysicsConsistParameters>,
 ) -> Result<(SimulationResponse, PathfindingResult)> {
     Ok(train_simulation_batch(
         conn,
@@ -388,6 +390,7 @@ pub async fn train_simulation(
         &[train_schedule],
         infra,
         electrical_profile_set_id,
+        physics_consist_parameters,
     )
     .await?
     .pop()
@@ -404,6 +407,7 @@ pub async fn train_simulation_batch(
     train_schedules: &[TrainSchedule],
     infra: &Infra,
     electrical_profile_set_id: Option<i64>,
+    physics_consist_parameters: Option<PhysicsConsistParameters>,
 ) -> Result<Vec<(SimulationResponse, PathfindingResult)>> {
     let mut valkey_conn = valkey_client.get_connection().await?;
     // Compute path
@@ -459,13 +463,21 @@ pub async fn train_simulation_batch(
 
         // Build simulation request
         let rolling_stock = rolling_stocks[&train_schedule.rolling_stock_name].clone();
+
+        let physics_consist_parameters =
+            if let Some(physics_consist_parameters) = physics_consist_parameters.clone() {
+                physics_consist_parameters.set_traction_engine(rolling_stock.into())
+            } else {
+                PhysicsConsistParameters::with_traction_engine(rolling_stock.into())
+            };
+
         let simulation_request = build_simulation_request(
             infra,
             train_schedule,
             path_item_positions,
             path,
-            rolling_stock,
             electrical_profile_set_id,
+            physics_consist_parameters,
         );
 
         // Compute unique hash of the simulation input
@@ -529,8 +541,8 @@ fn build_simulation_request(
     train_schedule: &TrainSchedule,
     path_item_positions: &[u64],
     path: SimulationPath,
-    rolling_stock: RollingStockModel,
     electrical_profile_set_id: Option<i64>,
+    physics_consist_parameters: PhysicsConsistParameters,
 ) -> SimulationRequest {
     assert_eq!(path_item_positions.len(), train_schedule.path.len());
     // Project path items to path offset
@@ -590,7 +602,7 @@ fn build_simulation_request(
         speed_limit_tag: train_schedule.speed_limit_tag.clone(),
         power_restrictions,
         options: train_schedule.options.clone(),
-        rolling_stock: PhysicsConsistParameters::with_traction_engine(rolling_stock.into()).into(),
+        rolling_stock: physics_consist_parameters.into(),
         electrical_profile_set_id,
     }
 }
@@ -697,6 +709,7 @@ async fn simulation_summary(
         &train_schedules,
         &infra,
         electrical_profile_set_id,
+        None,
     )
     .await?;
 
diff --git a/editoast/src/views/train_schedule/projection.rs b/editoast/src/views/train_schedule/projection.rs
index cdae18626e9..21f6be19f46 100644
--- a/editoast/src/views/train_schedule/projection.rs
+++ b/editoast/src/views/train_schedule/projection.rs
@@ -190,6 +190,7 @@ async fn project_path(
         &trains,
         &infra,
         electrical_profile_set_id,
+        None,
     )
     .await?;