Robart 604HD pneumatic retractable landing gear for RC airplane

Fully Pneumatic Retractable Landing Gear System

One of the main advantages of the Robart 604 is having a fully pneumatic configuration. The retraction and extension of the different landing gear components are controlled by air pressure, allowing for the synchronization of the main gear and nose gear operation. The Robart pneumatic system typically operates with a pressure range of 80 to 110 psi, which is approximately 5.5 to 7.6 bar. Robart specifies that if the operation becomes irregular despite correct pressure, increasing the available air volume can be achieved by using a larger reservoir or a second reservoir. For installation, it is necessary to plan the pneumatic circuit, including the reservoir, control valve, suitable pipes, and fittings.

Pneumatic Retractable Landing Gear for Large RC Aircraft

The Robart 604 is designed for hobbyists seeking a more comprehensive solution than a simple main gear mechanism. Its configuration is particularly suitable for aircraft equipped with tricycle landing gear, featuring two main gear units in the wings and a steerable nose gear. This architecture is especially suitable for RC aircraft with wide fuselages, twin-engine setups, and semi-scale models where the use of a pneumatic system helps maintain a clean and realistic installation. The Robart range is known for its retractable landing gear mechanisms equipped with positive locks to keep the gear in the extended and retracted positions. The pneumatic mechanisms use internal cylinders controlled by air pressure.

A Solution for Demanding RC Modeling

The Robart 604 allows for the installation of retractable landing gear without the need for multiple control technologies. Both the main gear and nose gear use the same pneumatic principle, with a radio control enabling the activation of the air circuit. This design is particularly useful for building or restoring an RC aircraft equipped with pneumatic retractable landing gear, providing a robust and consistent solution for the entire gear system. As Robart has now discontinued the production of its landing gear, struts, and aluminum wheels, the manufacturer's historical pages are mainly preserved for documentation purposes.

Robart 604 Features

Pneumatic Retractable Landing Gear Set Robart 604 Reference Configuration for Tricycle Landing Gear RC Aircraft Fully pneumatic system Main gear + nose gear Suitable for medium to large RC aircraft Applications: sport planes, semi-scale models, twin-engine aircraft, and warbirds Compressed air operation Robart pneumatic pressure: approximately 80 to 110 psi / 5.5 to 7.6 bar Air reservoir required Valve and pneumatic circuit to be planned Possibility to increase air volume with a larger reservoir or a second reservoir Solution suitable for models requiring a complete retractable landing gear Historical reference in the Robart range