
Originally Posted by
geepster775
If the articulated car platform shape has no wheels, then that specific platform would have no braking force. If you revise to add braking force to a platform where no wheels exist, you are giving the entire 5 platform car too much brake force. You are converting it force-wise into a husky stack type car instead of an articulated type car.
Usually on a 5-pack, end platforms A and B and middle platform D has 2 complete sets of wheels, while platform E and C have no wheels and thus should have no brake force.
Geepster, your post earned me a DOH.jpg....
I looked at some "C" cars and here's what I found:
Code:
include ( "..\\APL_C_KLINE.wag" )
Wagon (
include ( "..\\..\\..\\..\\..\\Common.inc\\Fleet\\Couplers\\Std_COFC_Coupler.inc" )
include ( "..\\..\\..\\..\\..\\Common.inc\\Fleet\\Brakes\\Single_Pipe_AB_Brakes_COFC.inc" )
ORTSAdhesion ( ORTSCurtius_Kniffler ( 7.5 44 0.161 0.7 ) )
ORTSNumberAxles ( 4 )
ORTSBearingType ( Roller )
ORTSDavis_A ( 691.24 )
ORTSDavis_B ( 12.5035 )
ORTSDavis_C ( 3.895220 )
Comment( == Assumptions -FreightCar DoubleStack - speed - 65mph (105km/h), Roller Bearing, 4 axles, frontal area - N/A, WagonWeight - 114.0 ton (metric) == )
)
Not only did I give them the normal set of brakes!...when I recalculate the Davis numbers with zero axles the value for Davis_A drops from 691.24 to 335.39. Something seemed screwy to me, could not put my finger on it until I read this post.
Now to recheck a whole bunch of work --- Thank you, sir...excellent point, indeed.