JP Hobby ER-120 Tricycle Retract Sequencer – Electronic Landing Gear Control Unit

The JP Hobby ER-120 Tricycle Retract Sequencer is an electronic landing gear control unit designed to provide precise, timed sequencing for tricycle landing gear systems in RC aircraft and advanced airframe builds.

The ER-120 V1 manages the deployment and retraction order of nose and main landing gear, ensuring smooth, coordinated motion that reduces mechanical stress on retract units, linkages, and airframe structures. By controlling timing and sequence logic electronically, the ER-120 V1 helps prevent binding, gear collision, and asymmetric deployment.

Primarily developed for RC airplanes, retract sequencers such as the ER-120 are also used in experimental aircraft models, research airframes, educational aerospace projects, and custom engineering platforms where controlled actuation and timing accuracy are essential.

Compact, reliable, and easy to integrate, the ER-120 V1 is an ideal solution for builders seeking professional landing gear behaviour without complex custom electronics.

MOQ: None. There is no MOQ on this product. 

Available for individual builders, workshops, educational users, and bulk orders.

Explore more products in Landing Gear Systems & Retract Controllers

Part of the RC Airplanes category

Key Features

Electronic retract sequencing for tricycle landing gear

Controls correct order of nose and main gear operation

Reduces mechanical stress on retract systems

Improves realism and operational safety

Compact and lightweight design

Simple integration with standard RC systems

Suitable for electric and pneumatic retract setups (controller side)

Technical Overview

Function: Landing gear sequencing & timing control

Gear Configuration: Tricycle (nose + main)

Control Type: Electronic logic controller

Integration: Standard RC retract / servo systems

Application: RC aircraft landing gear management

Specifications

Input voltage: 5V to 7.2V

Size: 52 x 32 x 10 mm

Weight: 22 gr