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§ 9
Aerodonetics.
gliding angle appears to have been excessive. According to the particulars given the model consists of a folded sheet of paper ballasted by a needle that may be adjusted as required, but the one view given by Marey leaves the exact form in doubt.[1]
Fig. 12 is a form due to Weiss, and derived from experiments with models shaped like a bird; it shows complete stability, and is prone to oscillate in its gliding path just as in the
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Fig. 11.
case of the ballasted aeroplane. In construction it consists of a sheet of paper cut to the form shown, the front being folded to give some stiffness to the leading edge, and ballasted by a small piece of lead glued in position. The tips of the "wings" are turned up slightly in the manner shown in the
- ↑ Fig. 11 is from a model made by the author from Professor Marey's description; a measurement of the gliding angle gave approximately 20 degrees.
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