Hint and tips
The Kewet has been produced
as 5 different models (CityJet 1..5) which all share the same
look. A few vans (CityVan) has also been produced with the same
technology as CityJet5. See pictures.
CityJet 1 and 2 used
open lead acid batteries in a 48V system, had a 4 speed + reverse
manual gear box and a 5KW DC motor. The DC motor controller was
made by Curtis.
Model 3 uses the same
voltage (48V). The manual gear box is replaced by an electronic
"gear box" and the engine is now rated to 7.5 kW.
Late production model 3
and later models were built around maintainance-free Hawker FGT
lead-acid batteries and a battery supervising system called (the
On the CityJet 4 the
voltage is increased to 60V and the engine to 10kW. The range is
improved from 20-30 km to about 30-50 km.
CityJet 5 uses two
strings of 6 * 12V Hawker lead-acid batteries for 72V. The
engine is increased to 12-15kW. All this gives a theorethical
range of 100 km @ 50 km/h.
The CityJet5 is still made in
small series in Oslo Norway. Every car is produced on order. Even
though the share the same basic design, options are for instance
NiCad batteries replacing the Hawker lead-acid batteries,
regenerative breaking, etc.
Vital data Kewet CityJet 5
72VDC 12kW @ 2750 RPM.
speed (level ground): 70-80 km/h dependent of battery charge,
tail wind etc.
to 50km/h: About 7 seconds.
to 70km/h: (Don’t ask, it takes time...)
12 * 6V 100Ah NiCad in series for 72V.
weight: 620 kg (850 kg lead-acid)
time: About 6-7 hrs for full charge.
hrs to 80% charge.
driving range: 46-56 km.
range (which I have never achieved) @ 50 km/h even speed, level
height over ground: 132 mm.
width: 1200 mm.
base 1550 mm.
of full turn: 3745 mm.
145/80 R13 75T.
Vebasto (utilizing kerozene)
Fiberglass body on
galvanized steel tube space-frame.