Industrial Consultancy & Sponsored Research (IC&SR) , IIT Madras

A Multirotor with a Vertically Offset Overlapping Configuration and Uses thereof

Technology Category/Market

Technology: Unmanned aerial vehicle (UAV)

Industry: UAV Industry; Applications: Military & defense; Logistics & Transportation, civil & commercial, construction & mining, Medical and agriculture;

Market: The global unmanned aerial vehicle market was valued at $ 24.72Billion & is projected to reach $70.91billion by 2030, at a significant CAGR of 15.6%


Problem Statement

  • In the present era, there is a growing possibility for the use of aerial robotic system or unmanned aerial vehicle (UAV) in multiple applications. There is a renewed interest in  designing such systems to achieve better performance.
  • The multirotor/quadrotor fits into the class of unmanned aerial systems and the critical parameters of a multirotor are its size, payload carrying capability, and endurance.
  • One of critical factors to decide the utility of the quadrotors for a particular application is its payload capacity. The usual practice to increase payload carrying capability is by increasing the size of propeller or increasing the number of rotors . However, increased no. of rotors and size of the rotors in conventional design is not considered as a good alternative.
  • Hence, the present patent is introduced to address the above issues in an efficient manner.


  • Present Patent describes an unmanned aerial vehicle (UAV) configuration comprises more than one frames, plurality of motors, plurality of propellers, landing gears and a standoff, designed efficiently and illustrated in figures.
  • Said patent relates to a vertically offset overlapping propulsion system (VOOPS).
  • VOOPS is a characteristic propeller configuration with a layered design, featured in smart chart hereinbelow.
  1. VOOPS allows to use propellers with larger diameter without increasing footprint;
  2. VOOPS based design provides better maneuverability as the rotors are closer to the center of the gravity reducing the moment of inertia ;
  3. VOOPS guarantees better endurance and payload lifting capability for the same size;

Key Features/Value Proposition

Technical Perspective:

  • Present Patent  provides efficient configuration which allows assembling propellers with larger diameter, without increasing its footprint.

Industrial Perspective: 

  • UAV design is configured professionally without affecting footprint and disturbing its actual size;
  • Present UAV configuration achieves better performance in terms of payload capacity, endurance and power rating.
Questions about this Technology?

Contact for Licensing

Research Lab

Prof. Asokan T

Department of Engineering Design

Intellectual Property

  • IITM IDF Ref.: 1236;      
  • IN Patent No. 421215 (Granted)

Technology Readiness Level

TRL- 4

 Proof of Concept Ready Stage & validated;

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