Combat Vehicles Research and Development Establishment (CVRDE), a lab under DRDO, has celebrated its annual raising day on 15th April 2023 at Arjun Auditorium of CVRDE. This function was presided over by DR. Samir. V. Kamat, Secretary, DD R&D and Chairman DRDO. Apart from Director General (ACE), most of the senior dignitaries from ADA, CEMILAC, HAL and other allied establishments ie. HVF, OCF, Engine Factory (Avadi), CRPF, DQA and AVNL HQ were participated. During this function some of the indigenously developed products of CVRDE related to Aircraft projects were handed over and the brief of the same is given below.

 

Design/Development of Indigenous Aircraft Quality Bearings

Combat Vehicles Research & Development Establishment (CVRDE), DRDO, Chennai has designed and developed the High Speed, High Precision, Aircraft quality bearings of LCA-Tejas successfully first time in the country, making Aatma Nirbhar Bharat in Aerospace Bearing Technology.  ADA, CEMILAC, DAGQA and the manufacturing partner M/s Austin Engineering Company Ltd., Gujarat teamed together along with CVRDE and accomplished this great success.

After successful conduct of flight trials on the indigenous AMAGB-bearings in LCA-Tejas, the production clearance is accorded by CEMILAC and the same was handed over by Honourable RM during Aero India-2023. And HAL(Engines) has already initiated action for obtaining these indigenous bearings. 

On this day, 15th April 2023, two sets of CVRDE developed AMAGB Bearings were handed over by Director-CVRDE, Chennai to GM-HAL (Engines), Bangalore in the august presence of Secretary DD(R&D) & Chairman DRDO for use in the production series of LCA Tejas.

With this achievement, CVRDE has established the development of High speed, high precision Aerospace Bearings within the country making India Aatma Nirbharta in Aerospace Bearing Technology. CVRDE has already taken up development of Aero Engine Bearings and is geared up to meet the requirements of aerospace bearings in the country.

 

 

PTO Shaft of LCA Tejas

The indigenous Power Take Off (PTO) shaft designed and developed by CVRDE, DRDO, Chennai with unique innovative patented “Frequency Spanning Technique (FST)” was test flown with LCA - Tejas LSP-3 aircraft on 14th March 2023.

Today flight clearance certificate for PTO Shaft is handed over by CE-CEMILAC to Director-CVRDE and a PTO Shaft is handed over by Director-CVRDE to DG-ADA in August presence of Chairman DRDO for flight trials in LCA-Tejas.

Landing Gear Seals

CVRDE has successfully designed, developed, qualified and delivered Landing Gear Systems for TAPAS and SWiFT UAVs and are undergoing flight trails.  The Shock absorber Strut of Landing Gear system has to absorb high kinetic energy during landing and take-off and also effectively isolate the vibration during taxiing on ground. These indigenously designed and developed Hydro-gas technology based Shock Absorber Struts are of telescopic design with a Floating piston separating gas and oil chambers. The dynamic seals used in the shock struts need to withstand high fluid pressures of the order of 450 bar, extreme operating temperatures from -40 °C to 200 °C and surface velocities of 6m/s during aircraft landing and are made of five Polymeric and Elastomer materials and are process intensive.

These dynamic Seals are indigenously Designed, Developed and qualified by CVRDE and manufactured through M/s Fluoro Carbon Seals Pvt. Ltd., Chennai for the first time in the country for Landing Gear application with due coordination by CEMILAC and DGAQA.  Based on this CEMILAC issued Clearances for Pre-Production Phase of five Seal Materials for Aeronautical application to CVRDE and M/s Fluoro Carbon Seals, Chennai.

This development made India Aatma nirbharta in Aerospace seal technology.

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