The Ultra Cruiser uses the same all-aluminium
construction as the older Hummel Bird, it is a completely redesigned
aircraft. It has been lengthened and lightened for better ground
stability and to fit into the U.S. ultralight category, according to
Hummel Aviation. Power is supplied by a 1/2 Volkswagen engine.
The Ultra Cruiser uses 6061-T6 aluminium
rivet-together construction. Currently the plane is only available
as plans-built, but preformed parts should soon be available.
The average builder constructing from plans should be able to
complete the project in about 800 hours, using standard metal tools.
A construction and flying video is available. It is anticipated the
plane will be available ready-to-fly in the near future.
According to Hummel, the Ultra Cruiser can be operated under FAR
Part 103 when powered by the 4-stroke 1/2 Volkswagen engine. The
plane has a canopy and cabin heat for all-weather flying. The canopy
can be quickly removed for summer flying. The wings are detachable
28-40 hp (4-cycle recommended)
rate of climb
landing distance, ground roll
limiting and recommended speeds
design manoeuvring speed (Va)
never exceed speed (Vne)
stall, power off (Vsl)
landing approach speed
All specifications are based on manufacturer's