Motorhome manufacturer Knaus Tabbert likes rotary engines, too.
Mazda always comes up when you hear about a rotary motor. However, this is not the case. The E.Power Drive concept RV, made by Tabbert, makes a surprise debut at the 2021 Caravan Salon. Although it looks normal inside and outside, the E.Power Drive is anything other than normal.
Knaus uses an electric motor to drive the front wheels, replacing the diesel engine and six speed manual transmission. Maximum power output is 241 horsepower (180kilowatts). This is sufficient to propel the large RV at speeds of over 68 mph (110 km/h), if you so choose. The 35 kWh battery will provide additional juice, with a range of 60 miles (90 km) for electric-only testing. The rotary engine is the key to the three-hour recharge of the battery.
Knaus does not give any details about the mill, or its origins. Other than the fact that it is a three-rotor and can charge the battery as well as supply electric power to the motor, Knaus has no other information. Although the total range of electric power and engine are not listed, the engine supplies standard 230-volt electricity to the cabin. Knaus claims that the engine can sustain power for five consecutive days under normal use conditions.
Knaus states that a rotary’s compact size and smooth operation are advantages over traditional gasoline or diesel internal combustion engine engines. However, other engines may be possible to replace the rotary. Knaus also stated that hydrogen fuel cells are being considered as an alternative to internal combustion power.
The motorhome is based on Knaus’ familiar Ti 650 MEG Vansation and built from a Fiat chassis. The motorhome can accommodate three people, has a fully-equipped kitchen and bathroom, as well as two 25-gallon (95 liter) tanks for fresh and wastewater water. Knaus installed a simple push-button panel on the dash and a large touchscreen to manage the various systems.
The E.Power Drive is currently a concept and is not yet available for purchase. It does however point to an electrified camping future for the German-based RV manufacturer. This also indicates that Mazda isn’t the only one interested in the rotary engine.