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Edwards D-11-B – EU category O3 trailer with an 8,800 kg gross weight, 2,190 kg unladen weight, 6,610 kg payload, 5.00 m length and a 3.68 m axle spread
At a gross weight of 8,800 kg, the D-11-B falls into EU trailer category O3, the band between 3,500 kg and 10 tonnes. From this category upward, a compressed-air brake system supplied from the towing vehicle is required instead of a simple overrun brake.
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At an unladen weight of 2,190 kg, the payload comes to 6,610 kg, a good three times the trailer's own weight. The 5.00 m length and 3.68 m axle spread give a compact, manoeuvrable design, and at 2.32 m width the D-11-B stays well under the European envelope of 2.55 m for road vehicles.
Towing combinations in this weight class require at least a category C1E licence, or CE above certain gross combination masses. The compressed-air brake is load-dependent, so braking deceleration matches the current loading state, and the compact dimensions allow work on tighter sites than the long semi-trailers in the same weight class.
When buying used, a trailer of this build calls for particular attention to the air lines, cylinders and couplings for tightness and function, the axle bearings and their mounting, the frame for corrosion along its full length, and the coupling eye for wear in the eye itself and its bearing. The lighting system and the side panels are also worth a close look given the compact build, and the drawbar itself should be checked for straightness after decades of coupling and uncoupling.
Sources: SpecCodex-Register: Kennwerte des Modells Edwards D-11-B
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