|SinusLeistungsSteller - Wheel Loader 10.06.2007|
Gerhard Süß´s Wheel Loader
The model of a wheel loader (scale 1:4) from Gerhard Süß is really amazing! In unbelievable great detail and a estimated building time of more than 1.000 hours, we might mistake this fully functional model for a real wheel loader, moving between giants ;-) Gerhard Süß and his son built it all by themselves. A steel sheet of minimum 3mm thickness was consistantly used. The end result of this construction was an absolutely solid device with a weight of more than 400kg.
The only thing missing, was a suitable motor for the recently completed model (the paint had just dried). Gerhard was focusing on a electro motor from the start and designed the whole model towards this target. It must have been very disappointing for him, when his controllers exploded in a cloud of smoke during the first road tests.
Then Gerhard heard about our SLS! After a short call with us for an appointment, he came by a few days later together with his son. On September the 14. of 2007 he arrived at 9 o'clock and caused almost a traffic chaos in our narrow side street with his (not covered) model on the trailer, because all drivers first stopped astonished and first had to take a closer look at the model. Fortunately no accidents happened ;-)
After we had overcome our own speachlessness, we immediately started working, measuring the motor (Torcman Monster TM685-40), tune and optimize it for the SLS-42-110. Not 2 hours later the wheel loader started moving from the trailer over a ramp towards the road. We had hope to get it back up ;-)
First tests were performed on the plane (with a relieved model builder as a test pilot) followed by tests in heavier terrain. Thanks to the centrifugal clutch introduced by Gerhard and the torque control of the SLS, everything worked quite quickly.
It quickly became clear, that the missing torque control of the "other controllers" was the cause for their defects: As soon as clutch engaged, the torque (and so the motor current) increased beyond all limits - without the option to limit the motor-current, this meant sudden and quick death of the controllers ... Our SLS-42-110 (we only need our smallest SLS!) has not this kind of problems :-) It was even possible to stop the wheel loader (400kg!) with slipping clutch on a slope!
... and to get the wheel loader back up on the trailer was the smallest problem.
On Saturday (06.10.2007) we met Gerhard Süß again. He improved the gear of the wheel loader, since our last meeting, to allow even more torque. Calculated by thumb more than 500Nm should be available on the wheels! Now the shovel is actually filled...
During intensive field work (as shown in both videos) the battery power lasts for more than one hour. The hydraulic was really power wasting (here are still brushed motors used) - potential for optimizing is still there! For just driving on the plane the battery charge lasts for 3 (possibly 4) hours.
... more videos:
More details about this great model: click here
More models from Gerhard Süß are found here: www.rc-grossmodellbau.de