LED Landing Light 3L cd
High Output LED Helicopter Landing and Search Light with Visible and Covert IR Modes for Defence Aviation
The LED Landing Light 3L cd is a high output helicopter landing and search light designed, developed and manufactured by System Controls for low-speed airborne helicopter platforms. Delivering 300,000 cd peak visible output with a 14° H by 8° V beam angle and covert IR illumination at 790 to 920nm for NVG-assisted night operations, it deploys from 0° to 120° in 12 seconds maximum and rotates continuously through N x 360° in 15 seconds maximum. Precision rugged steel gear trains, DC motor drive and a highly reliable slip ring ensure consistent deployment and rotation performance throughout the operational life of the unit.
What is the LED Landing Light 3L cd?
The LED Landing Light 3L cd is the high output configuration of the System Controls LED Landing Light range, designed, developed and manufactured for low-speed airborne helicopter platforms. It delivers 300,000 cd peak visible output, matching the light output of the DFLL Dual Filament Landing Light in an LED light source configuration. Precision rugged steel gear trains housed in a compact package provide retraction, extension and rotation through DC motors and a highly reliable slip ring rated to withstand operational wind loads. Limit switches cut off and restore power as required across the deployment cycle. The light rotates continuously through 360° with visible or infrared illumination selected on in the extended position, with full illumination in both modes available across the +90° to -90° rotation arc. For platforms requiring the highest visible output in the LED Landing Light range, the 3L cd is the correct selection.
| Parameter | Specification |
|---|---|
| Dual Modes of Operation | |
| First Mode of Operation | Visible mode |
| Second Mode of Operation | Covert (IR) mode |
| Visible Mode Light Output | |
| Normal Lamp Peak Light Output | 3,00,000 cd |
| Beam Angle (Visible Mode) | 14° Horizontal X 8° Vertical |
| IR (Covert) Mode Light Output | |
| IR Lamp Intensity | 0.5 NRI minimum |
| Residual Visible Light in IR Mode | 1 CP max |
| Axial Radiant Intensity | 30 mW/Sr |
| Wavelength Range in IR Mode | 790-920 nm |
| Beam Angle (IR Mode) | 60° Horizontal X 60° Vertical |
| Extension and Retraction Stroke | |
| Extension and Retraction Range | 0° to 120° |
| Time Taken for 0° to 120° Extension | 12 seconds max |
| Left and Right Rotation | |
| Rotation Angle (Both Directions) | N * 360° |
| Time Taken for One Rotation | 15 sec max |
300,000 cd High Output LED Illumination
The LED Landing Light 3L cd delivers 300,000 cd peak visible output with a focused 14° horizontal by 8° vertical beam angle, providing the highest visible illumination output in the System Controls LED Landing Light range. This high intensity directed output is suited to helicopter platforms requiring maximum illumination performance during landing and search operations in reduced visibility conditions.
Rapid Two-Axis Motorised Deployment
The first axis deploys from 0° to 120° in 12 seconds maximum. The second axis rotates through N x 360° in 15 seconds maximum. Both axes are driven by DC motors through precision rugged steel gear trains with limit switches managing power cut-off and restoration at defined positions, providing motorised, repeatable deployment throughout the operational cycle.
Covert IR Mode for NVG Night Operations
Extension from 0° to 120° completes in 12 seconds maximum. Full N x 360° rotation completes in 15 seconds maximum. Both axes are driven by DC motors through precision rugged steel gear trains with limit switches managing power cut-off and restoration at defined positions throughout the deployment and rotation cycle.
Reliable Slip Ring for Wind Load Operation
A highly reliable slip ring rated to withstand operational wind loads maintains electrical continuity to the LED light source during continuous 360° rotation. This slip ring architecture ensures uninterrupted power and signal supply to the light assembly throughout the full rotation range regardless of wind loading conditions at operational helicopter platform speeds.
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High output helicopter landing and search light, 300,000 cd peak visible and covert IR mode for NVG operations. Deploys 0° to 120° in 12 seconds and rotates N x 360° in 15 seconds maximum.
300,000 cd visible with 14° H by 8° V beam angle. IR mode: 60° H by 60° V at 790-920nm, 30 mW/Sr axial radiant intensity.
Peak visible output only. 1.5L cd is 150,000 cd, 3L cd is 300,000 cd. All mechanical specs, IR mode specs, deployment and rotation performance are identical.
Yes. 60° H by 60° V at 790-920nm, 0.5 NRI minimum, residual visible 1CP maximum for NVG covert compliance.
0° to 120° extension in 12 seconds maximum. N x 360° rotation in 15 seconds maximum. DC motor driven precision gear train.
Yes. Both IR and visible modes are available across the full +90° to -90° rotation arc during continuous 360° rotation in the extended position.
Primary use in helicopters during landing and taxiing. Low-speed airborne platforms.
