| Ballast for the gross weight test
Don Chapman next to our Zodiac and
all ballast used for the gross weight climb rate
test, which is required for Canadian homebuilts.
The test made practical use of my
university text books, including the 800+ page
classic, "Analysis and Design of Flight Vehicle
Structures".
In addition to myself and my father
as crew, we took along 250 pounds of baggage to
ensure that the weight was at (or just above) maximum
gross weight. The aircraft itself weighed less than
600 lb unpainted, un-upholstered, and only the single
16 gal. fuselage tank. Bringing the aircraft to 1200
lb gross weight therefore took some work.
Ballast was distributed among the
baggage compartments in the wings and turtledeck, the
maximum 40 lb each. Temporary seat cushions were
removed to allow each of the two crew to sit on a 65
lb bag of gravel.
Cowl air
intakes:
The added 'cheek' intake feeds the the bottom 2/3 of
the internal coolant rad. The upper 1/3 of the rad is
fed from the main cowl intake. A larger cowling air
exit can also be seen. Although there's plenty
of air intake area, we still need to work on making
the system more efficient for summer cooling.
(Oct. 1999 photo)
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