Client

Vikram Sarabhai Space
Centre (VSSC), ISRO

Industry

Aerospace, Defence

Challenge

VSSC is developing reusable launch vehicles to make space missions and satellite launches economical. As a major step towards the mission, an experimental flight of Reusable Launch Vehicle – Landing Experiment (RLV-LEX) for technology demonstration of ground landing of a space vehicle after re-entry into the atmosphere was planned – the first of its kind in India. The airframe had been developed by VSSC, and they were looking for an indigenous partner to develop the landing gear system for precise and safe landing of its winged aircraft on a specific runway – all autonomously. 

 

Timetooth took up the challenge of developing the mission specific Landing Gear system with peculiar requirements at a reasonable cost and in a given timeline. The system development included main landing units, nose landing unit, wheel-tyre-brake assemblies, braking system, steering system, weight-and-speed sensors and Landing Gear controller.

Service Area

Turnkey New Product Development

Timeline

August 2018 to February 2021

Qualification testing demonstrated an excellent correlation (>90%) between simulation results and real time tests, delivering one of the strongest, light weight and most efficient energy absorbing Landing gear system.

Landing Gear Configuration

1. Tricycle arrangement (1 Nose Landing Gear, 2 Main Landing Gear).

2. Oleo-pneumatic Non-retractable system.

3. Electrically actuated steering on Nose wheel.

4. Electrically actuated brakes on Main Wheels.

Solutions   

The landing gear system is one of the most critical subsystems of an aircraft. It protects the aircraft from landing shocks and is pivotal for on-ground operations like steering and braking. Timetooth leveraged Multibody dynamics and CFD analysis for optimizing the dynamic performance of the strut, FE analysis for ensuring structural strength and Modal analysis for vibration management. Timetooth designed the system as per US FAR Part 23 standards. Timetooth partnered with its local ecosystem of vendors for aerospace grade manufacturing, special processes and procured standard items from its global supply chain. Qualification testing demonstrated an excellent correlation (>90%) between simulation results and real time tests, delivering one of the strongest, light weight and most efficient energy absorbing LG units. It is designed for two-point flared landing on the main landing unit absorbing major shock energy in a small stroke and slap-down of the nose landing gear with minimum pitching of the aircraft. The nose-wheel-steering mechanism plays a major role in handling the aircraft during high speed taxiing. It also caters for mission specific high landing speed and tail down landing angle.

Key Highlights

ROI for the client

Airworthy landing system indigenously developed & delivered in a short span of time.

Maiden landing successfully completed on April 2, 2023 with Timetooth landing system.