Universal Rope Crawler Excavator Model
Wire rope-excavator with lattice jibb for clamshell, dragline or crane, as well as dragshovel and face shovel. Power (220 Volt AC) and steering (24 Volt DC) via cable. This machine is without a definitive prototype; it is a working model. But some characteristics are from real models: Orenstein & Koppel (face shovel), DEMAG (crawler tracks), Weserhütte guide rope winch to haul closer the clamshell to the cabin and for the balance. In 1940 years this was seldom found in Germany. All of the parts were selfmade, except the motors, gearwheels, relays etc..
 
 
Width    440 mm
Length    730 mm
Height without boom 620 mm    620 mm
Boom lattice (for crane, clamshell) length 2000 mm 
Weight, depending on equipment  kg 91- 95 kg
   - " - , lower carriage only        34 kg
Transformer input       220 V AC
Selenium and copper-oxide rectifier     7
Relays   24
Relay voltage  24 V DC
Motors     7
Voltages for the different motors  24 -150 V DC
Slip rings/carbon brushes (lower/upper carriage)  24
Gear wheels  34

Efficiency:
Lifting capacity 8 kg, with boom angle about 80° and hook block 14 kg.
Capacities: clamshell 3,3 cdm, Polyp clamshell 2 cdm, dragline 3,0 cdm, dragshovel 2,5 cdm, faceshovel 3 cdm.
 
 
With clamshell

All pictures in big size




Brief history
The idea to build the Excavator was born in 1945, at the end of the II. WW. The German soldiers has leave the anti-aircraft. I was a fourteen years old boy and looked for technical materials in that machines. When I opened an operator machine, I saw 32 sliprings and a toothed ring. When I saw this parts - it was an idea as a lightning - from this parts it shut be possible to build an Excavator. The toothed ring shut be good to support the upper cabin, the sleeprings/carbonbrushes to feed the upper cabin with electric power and steering from the lower carriage.  Later on I found some small motors and a cord (for power and remote steering).  But only some parts for the under carriage was possible to build in the time short after the war. It was easier to continue to produce parts (as well crawler, wheels etc.) during an 2 1/2 years (1951-54) job in Sweden. The completion of the base machine with clamshell and dragline was done 1954 in Hannover. Dragshovel followed 1955, face shovel 1958, polyp clamshell and "bomb" (not RAF) 1999.

Horst Moch