January 2021 ONLINE ONLINE COLLABORATION DEFENCE SPACE INDIA’S HUMAN SPACEFLIGHT DEFYING GRAVITY EVTOL SECTOR CONTINUES SECTOR EVTOL CHALLENGES ABOVE SOAR TO www.aerosociety.com AEROSPACE January 2021 Volume 48 Number 1 Royal Aeronautical Society THE AERONAUTICAL NOW FREE JOURNAL TO ALL RAeS Covering all aspects of aerospace MEMBERS! Editor-in-Chief: Professor Holger Babinsky FRAeS University of Cambridge, UK Chairman of the Editorial Board: Professor Mike Graham FREng FRAeS Imperial College London, UK Deputy Chairman of the Editorial Board: Professor Chris Atkin CEng FRAeS City, University of London, UK We have exciting news for readers of The Aeronautical Journal. The Royal Aeronautical Society, in partnership with its co-publishers, Cambridge University Press, has taken the decision to make The Aeronautical Journal available, free of charge, to all members of The RAeS from January 2021. As part of these changes, the RAeS will no longer offer the journal in printed form. If you currently subscribe to The Aeronautical Journal, you will not have your subscription renewed, instead you are invited to view the Journal and its 124 year old back catalogue for free with the rest of the membership. From 1 January 2021, members will have free access to the Journal’s dedicated website via a link at: aerosociety.com/aerojournal. If you have any questions, or require further support, contact:
[email protected] Get FREE ACCESS to a sample collection at: cambridge.org/aer/sc WJD Aero Journal FP Advert 11_2020.indd 2 14/12/2020 14:49 Volume 48 Number 1 January 2021 EDITORIAL Contents The long haul to recovery? Regulars 4 Radome 12 Transmission Many people will be glad to have seen the back of 2020 and the worldwide The latest aviation and Your letters, emails, tweets aeronautical intelligence, and social media feedback.