diff --git a/lib_planes/custom_physics.lua b/lib_planes/custom_physics.lua
index 206aa76..f1f1eea 100755
--- a/lib_planes/custom_physics.lua
+++ b/lib_planes/custom_physics.lua
@@ -36,10 +36,13 @@ function airutils.physics(self)
         local height = self.height
 		local submergence = math.min(surface-spos.y,height)/height
 --		local balance = self.buoyancy*self.height
-		--local buoyacc = airutils.gravity*(self.buoyancy-submergence)
         local buoyacc = airutils.gravity*(self.buoyancy-submergence)
         --local buoyacc = self._baloon_buoyancy*(self.buoyancy-submergence)
-        accell = {x=-vel.x*self.water_drag,y=buoyacc-(vel.y*math.abs(vel.y)*0.4),z=-vel.z*self.water_drag}
+        accell = {
+                    x=-vel.x*self.water_drag,
+                    y=buoyacc-(vel.y*math.abs(vel.y)*0.4),
+                    z=-vel.z*self.water_drag
+                }
         if self.buoyancy >= 1 then self._engine_running = false end
         if last_accel then
             accell = vector.add(accell,last_accel)
diff --git a/lib_planes/entities.lua b/lib_planes/entities.lua
index c959901..4a67728 100644
--- a/lib_planes/entities.lua
+++ b/lib_planes/entities.lua
@@ -331,7 +331,7 @@ function airutils.logic(self)
 
     if (math.abs(velocity.x) < 0.1 and math.abs(velocity.z) < 0.1) and is_flying == false and is_attached == false and self._engine_running == false then
         if self._ground_friction then
-            if self._ground_friction > 0.97 then self.object:set_velocity({x=0,y=airutils.gravity*self.dtime,z=0}) end
+            if self._ground_friction > 0.97 and self.buoyancy >= 1 then self.object:set_velocity({x=0,y=airutils.gravity*self.dtime,z=0}) end
         end
         return
     end