Rescue Hexacopter Project


Design - Landing Gear

Now that the basic body design work is done, we can concentrate on the design of the landing gear. Each student presented a Landing Gear design and we compared the submitted designs and ultimately decided to go with none of them. Instead, we took elements from several designs and designed a retractable landing gear. A retractable gear system will allow the FLIR camera the maximum range of movement.

The key component in the landing gear is the servoless retract. A retract is designed to move a structure (usually RC landing wheels) 90 degrees in one direction and then back to its original position. It operates on a 5 to 7 Volt circuit. The retract we chose was designed for 10-12 kg craft. We will be using 4 of them to support our legs. This will ensure that the retracts will be well under their load capacity.

Based on specifications obtained from vendor materials, we designed a 3D model of the retract for modeling purposes. The model is shown here in its retracted position:

Servoless Retract in retract position

And in its extended position:

Servoless retract in extended position

The retract will be mounted on the Landing Gear Plate. The Landing Gear plate will have cutouts the same size as the retract pin carrier. The retracts will be positioned at the edge of the plate as close to the corners as possible and secured by four 4x10 mm screws and bolts.


Landing Gear Plate

Landing Gear Plate with Retracts installed.

The Landing Gear Plate will be mounted to the bottom of the Bottom Plate with six 2 in. aluminum standoffs secured with six 4x10 mm screws on the bottom of the Landing Gear Plate.

Landing Gear Plate with standoffs installed


Landing Gear Component Drawings
Part/Assembly PDF STEP
2 in. Standoff 2 in. Standoff.pdf 2 in. Standoff.stp
Landing Gear Plate Landing Gear Plate.pdf Landing Gear Plate.stp
Servoless Retract Servoless Retract.pdf Servoless Retract.stp