Respectively to the curves illustrating LIMs shutting forces discussed above resisting forces are maximal and act longer for largest size and stroke 6 mm thickness blade damper
(near 260 N and 0,54 s), while the same thickness quarter size blades induce 60 N, or 4,3 times smaller resisting force (at the end of stroke) (Fig.
The scope of the agreements includes the development of the Blade Fold System, the Blade Damper
and the Rotor Brake Module.
6 (square inlet) If a round cross opposed blade damper is used instead of a sliding damper, subtract 0.
Damper types used were the round sliding, the round opposed blade, and the square opposed blade dampers.
The damper used for the close coupling testing was the round opposed blade damper in the full open position.
Sound Level Increase, Field Installations with a 3 Diameter Vertical Duct Height Sound Level Increase in NC: Vertical Inlet Duct Height: 3 Diameters All inlet Case 1 Case 2 Case 3 Case 4 diameters Damper: no no damper in damper in (sliding for damper damper inlet inlet round inlet, opposed blade for square inlet) Duct type flex rigid flex rigid Square 1 0 8 7 (round inlet) Round (round 1 0 10 8 inlet) Diffuser Plaque 1 0 8 7 type (round inlet) Perforated 1 0 5 5 (round inlet) Modular Core 0 0 3 2 (square inlet) Louvered 1 0 7 6 (square inlet) If a round opposed blade damper is used instead of a sliding damper, subtract 2 dB from the noise increase.
Manufacturer C used an opposed blade damper
for both brands of motors.
GE Aviation's Singapore service operation has started producing new blade dampers
and seals for GE's CF6 and CF34 aircraft and LM marine engines.
Each system cools or heats only those rooms and suites in use through the miniature pneumatically activated blade dampers