Futaba Corporation Launches Slim Sub-Receiver "R70SR" for RC Airplanes

Futaba Corporation (Headquarters: Mobara City, Chiba Prefecture), a long-time provider of high-performance transmitters and aircraft in the radio control field, released the slim sub-receiver "R70SR" for RC airplanes at the end of May 2026. The R70SR achieves a slim 15mm width and a lightweight design of 3.9g while incorporating a diversity antenna system (※1). This sub-receiver offers users stable and redundant reception even in aircraft with limited installation space.

(※1) Diversity System: A system that receives the same radio waves using "multiple antennas."

Product Overview R70SR | Futaba Corporation Radio Control

In recent years, RC airplanes and helicopters have become larger and more powerful, leading to increased aircraft structure density and increasingly strict limitations on the freedom of electronic component installation. Consequently, demands for reliability to protect expensive aircraft and payloads, as well as for competitions and events, have also risen. The R70SR was developed to meet these user demands. It is a sub-receiver that allows for the addition of reception redundancy without difficulty, even in limited spaces.

FASSTest(※2) 2.4GHz System (26ch/18ch/12ch modes)

Dedicated sub-receiver for the Dual RX Link System(※3)

Dedicated sub-receiver, for reception only

Antenna: Diversity system

Dimensions: 15.0 x 43.0 x 5.0mm Weight: 3.9g

Usable Voltage Range: 3.5-8.4V

Connector Shape: Standard connector

Price: ¥8,800 <041693>

(※2) Air Radio Control System For details, refer to the link: Futaba RC Technology - Air Radio Control System

(※3) Reception system compatible with sub-receivers For details, refer to the link: Futaba RC Technology - Dual Rx Link System

Features of R70SR

1. Improved Installation Flexibility with Slim Shape

- Width 15.0mm x Length 43.0mm x Thickness 5.0mm - Elongated body that easily fits into narrow fuselages or frame gaps This makes it easier to install in aircraft where installing a sub-receiver was previously difficult.

2. Stable Reception with Diversity Antenna System

Adopts a diversity system using two antenna lines. This reduces variations in reception conditions due to aircraft attitude or environmental changes, and by combining it with the main receiver, a more stable link is achieved.

3. Dedicated Design for Dual RX Link System

The R70SR is designed exclusively as a sub-receiver.

- Compatible with FASSTest 2.4GHz system (26ch / 18ch / 12ch modes) - Used in combination with main receivers, DLPH series, or CGY770R - As it is designed for reception only, it does not include servo direct drive or telemetry functions By focusing on essential functions, it achieves a balance of small size, light weight, and high reliability.

Futaba Corporation will continue to strive for improvements in quality and performance for the RC aircraft market.

Company Overview

Company Name: Futaba Corporation

Location: Mobara City, Chiba Prefecture

Established: 1948

Business Activities: Design, development, manufacturing, and sales of various electronic components, radio equipment, and production equipment (including composite modules, industrial and hobby radio control equipment, robotics products, organic EL displays, plate products, die equipment, and molding/production rationalization equipment).

URL: https://www.futaba.co.jp/

Contact Information

【Product Inquiries】

Futaba Corporation Robotics Solution Business Center

Customer Service Phone Number: 0475-32-4395

Various inquiries about products and the company | Futaba Corporation

【Inquiries Regarding This Matter】

629 Oshiba, Mobara City, Chiba Prefecture 297-8588

Futaba Corporation

Public Relations Department, Business Strategy Division Manager: Yusuke Nakano

TEL: 0475-24-1111 (Main)

Inquiries: Support TOP | Futaba Corporation Radio Control