55
Optional Accessories
Hydraulic rotor brake, order no. 6810.100
A hydraulic rotor brake is available as an optional accessory; it is servo-operated and has two
purposes: it slows down the main rotor quickly after switching the engine off, and it also helps to
prevent a rotor blade ending up over the exhaust efflux during the start-up phase.
The brake disc A is clamped to the projecting bottom end of the main rotor shaft by means of
grubscrews; the brake B itself is fixed to the holes already present in the chassis plate using two
M3 x 25 socket-head cap screws and self-locking nuts.
The main brake cylinder C is fixed to the holder D using M3 x 18 socket-head cap screws. The
entire assembly is then attached to the chassis as shown in the illustration, fitting the M3 x 14
screws supplied with the brake in place of the standard M3 x 10 socket-head cap screws. The
servo used to actuate the brake is mounted in the appropriate chassis opening, as shown in the
picture, and linked to the brake cylinder using the pushrod supplied. Finally the hydraulic
connection between main brake cylinder and brake is completed using the hose supplied. The
hydraulic oil is added through the hole which is left when screw X is removed. The system must
be completely filled with oil; any air bubbles in the hose and cylinders must be removed
(bleeding the brake).
Important: ensure that the brake is initially applied gently; the main rotor must certainly
not be slowed abruptly, as this could cause the rotor blades to swing out of their blade
holders and collide with the fuselage.
Содержание JetCat 6810
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Страница 101: ...31 Operating Instructions Graupner Jetcat Modell Helicopter Turbine PHT 3 ...
Страница 107: ...37 Wiring diagram fuel pump and starter glowplug Connections overwiew of the turbine s operating components ...
Страница 171: ...31 Instructions d utilisation ...
Страница 177: ...37 Schéma de connexion Pompe à carburant et Starter Bougie Connexions des éléments de commande Généralité ...