I did these tests with Roco locos versus Märklin.
I found roco locos e.g. SBB Ae 8/14 pulled away the Märklin SBB Ae 8/14 (5pole motors)
Yes my SBB Re 460, BLS 465 (5pole) and Taurus (sinus)are good pulling locos.
Mind you the BR 50 although it has three driven axles only 2 axles have Rubbertyres.
the same goes for the BR 194. Weight is a crucial factor also.
My Märklin SBB Ae 6/8 (Crocodile) had no match for the Roco Crocodile.
Roco 2016 Diesel Loco ? not so good, just the amount of carriages.(no comparision).

Will do some tests with Roco ÖBB Rh 1044 and Märklin Br E 110, E 140, E 141,
Roco Ludmilla Br 232, very good pulling power.


regards.,
John

The pullingpowers between Märklin locos is very similar.


Cinus motors (earlier) have an enormous starting torque.
If a loco has the weight also it should have a very good pulling power.

Although Roco locos are lighter, they usually have 3, 4, 5 axles powered.Including their wurmgears makes them very good pulling locos.
some of them are lacking in weight.

For the average layout including any hills there are very poor performers in the Märklin range.
BR 53 is one of them.

Roco Steam locos with tender drive are not known to be good pullers.
An advantage with Roco locos is, you can exchange the non rubbertyres driving wheels with rubbertyres.

To make any worthwhile test runs, you could ruin some of your Rubbertyres, by stretching them.

some of you may have not noticed, Co-Co Locos, such as BR 50, BR 150, BR 151, BR 103, BR 194, BR 94, although they have three powered axles, 2 axles are touching the track, the middle one is slightly off the track.
You will notice this by closer inspection, your middle axle is clean and free from any track wear.
so if you consider increasing the pulling power by adding another axle with rubbertyres, you will not achieve very much.
Since I have modified most of my steam & older electric locos, I cannot deliver a true order of pulling power between locos of similar design. e.g BR 44 versus BR 50/BR 52/ BR 41 etc. etc.

Most Märklin Bo-Bo locos have the same drive and weight.

Although I prefer a sinus to a 5 pole motor, the difference in pullingpower, is irrelevent, in my opinion, usually the maximum carriages are 50, fully loaded e.g. with real coal or iron ore. (each carriages weighs approx. 260g = 260g x 50 = 13kg).

Just to proof it whether or not it can pull such a weight, is not advisable to do so over a longer distance or a period of time.

I've had my SBB Ae 8/14, (2 motors), SBB Ae 8/8, (2 motors), Roco DB BR 232), BR 191 (2 motors), Märklin BR 50 (3084, 10 rubbertyres), Märklin BR 41, (3082, 8 Rubbertyres), BR 44(3027, 3047, 10 Rubbertyres), another is the Swedish Iron Ore Train roco model (101-102) with 2 motors powered over 12 axles and 10 axles with Rubbertyres. or the three part older version.
pulling about 8.5kg.








regards.,
John

This depends on the weight of the whole train + if there are any curves and how sharp the curves are.


John

Weight 1.280kg single loco: 640 gram

at the moment this loco has 4 traction tyres (2axles) for each loco.
the advantage is you could increase the pulling power by adding more axles with rubbertyres (e.g. 4 axles = 8 Rubbertyres) x 2 = 16 Rubbertyres ( 8 axles) for 2 locos.
the loco would still have 4 axles for track contact.
this would be one of the heaviest locos on the model train market (except brass locos)



regards.,
John