MegaTech R/C Real World Helicopter Series Uživatelský manuál stáhnout pdf (Strana 58)

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The easiest way to launch your

bird model Is to drop ft from a

mother ship. This way, you can

try out slight modifications and

wing-configuration changes.

Is Ha model or the real thing? Really hard to

tell—even for real birds!

Design and Build an

A turkey vulture that can thermal!

by Bob Hoey

odelers have been attempting to build and fly bfrd models for a

time. The challenge of doing this successfully, however, is obvious

i builder-after all, birds have neither rudders nor vertical tails. Over the

last 11 years, I have used RC models to try to understand how soaring birds fly

without vertical tails. I have developed four bird models (Raven, Seagull, Turkey

Vulture and Pelican) that fly reasonably well without vertical fins or rudders. This

research has given me a pretty good understanding of the stability and control of

gliding birds. I can now design glider models of birds that require surprisingly small

design concessions and look quite realistic In flight. The bird's complex control!

methods cannot be duplicated exactly, and our flying ability is limited to _J

dng and controlling from a remote viewpoint, so we may have to cheaj

e to achieve stable, controllable flight. Nevertheless, we can

amlc methods for stability and control.

Blrd-IIke flight Is possible with

model even wHhout a vertical fin

and rudder. The secret Is In the

wingtlp feathers that act like

ailerons to turn the model.

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MegaTech R/C Real World Helicopter Series Uživatelský manuál Strana 58