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Archive for March, 2011
Posted by Zaitsevsky | Mar 29, 2011 @ 05:57 PM | 9,496 Views
Onboard Camera.
Elimination of vibration and swinging


Three types of undesirable oscillation may be singled out in the radio-controlled model, i.e. a) vibration, related with operation of the engine and mechanical schemes; b) jolting, related with the air flows; c) swinging of the model while maneuvering.

Vibration of the helicopter model is the strongest. Seeking for reduction of vibration, it is possible to adapt the shock-absorbers, which are assigned for industrial use. Pay attention to the optimal load, which is usually indicated on such shock-absorber.



It is possible to use the shock-absorbers, assigned for the automobile CD-DVD player, if a small photo-camera is installed. Usually small rubber shock-absorbers with the gel inside are installed in the players.



It is possible to make a sufficiently light shock-absorber out of two plates with the soft rubber, clutched between them; the plates are clenched with the help of the rubber rings from outside. If You are afraid that the rubber will get torn, install the freely hanging safety belts additionally.

Seeking for alleviation of jolting, the shock-absorbers, assigned for the undercarriage of the radio-controlled automobiles, are used. These shock-absorbers consist out of the spring and the pneumatic or oil piston. The freely swinging platform of the camera is underpinned with the shock-absorbers from the opposite sides.

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Posted by Zaitsevsky | Mar 28, 2011 @ 04:40 AM | 9,267 Views
Positioning of the camera under the bottom of the helicopter



Positioning of the camera under the bottom of the helicopter allows achievement of a wide panorama and does not cause displacement of the center of gravity aside. However, displacement of the center of mass downwards occurs; this produces a negative impact upon controlling of the model. If the camera on the controlled gimbal is installed under the bottom of the helicopter, the undercarriage must be both increased and retractable so as not to disturb the camera. The undercarriage "OpenButtom" is produced out of the aluminum profile and substitutes the common undercarriage. The mass of the ordinary undercarriage, attributed to the 50-90 class, amounts to 100-150 g. The mass of this particular undercarriage is 360 g, including the servo. Availability of the standard servo (modification - 180 degrees) is quite sufficient for controlling the undercarriage, but fastening with the help of the extra bearing from outside is necessary so that the body of the servo would endure the possible jerks at the moment of landing.



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