1. A completely reusable aerospace system based on subsonic carrier with the return of the first stages to the starting point

   • V. I. Buzuluk
   • S. M. Mikhalyov

   Original Paper Open access 23 February 2021 Pages: 471 - 480

   

2. Sound quality assessment of a medium-range aircraft with enhanced fan-noise shielding design

   • Gil Felix Greco
   • Lothar Bertsch
   • Sabine C. Langer

   Original Paper Open access 21 April 2021 Pages: 481 - 493

   

3. Quieter and Greener rotorcraft: concurrent aerodynamic and acoustic optimization

   • Gunther Wilke

   Original Paper Open access 21 April 2021 Pages: 495 - 508

   

4. Structural concept of an adaptive shock control bump spoiler

   • Markus Kintscher
   • Johannes Riemenschneider
   • Martin Wiedemann

   Original Paper Open access 21 April 2021 Pages: 509 - 518

   

5. Analytic solution of in-plane vortex–rotor interactions with arbitrary orientation and its impact on rotor trim

   • Berend G. van der Wall
   • Lennert B. van der Wall

   Original Paper Open access 27 April 2021 Pages: 519 - 534

   

6. Turbulence load prediction for manned and unmanned aircraft by means of anticipating differential pressure measurements

   • Andras Galffy
   • Rainer Gaggl
   • Georg Schitter

   Original Paper Open access 30 April 2021 Pages: 535 - 548

   

7. Development of a hardware-in-the-loop demonstrator for the validation of fault-tolerant control methods for a hybrid UAV

   • F. Prochazka
   • S. Krüger
   • M. Bauer

   Original Paper Open access 05 May 2021 Pages: 549 - 558

   

8. Experimental and numerical studies on small contra-rotating electrical ducted fan engines

   • Tobias Ebus
   • Markus Dietz
   • Andreas Hupfer

   Original Paper Open access 29 May 2021 Pages: 559 - 571

   

9. Production and characterization of experimental low noise trailing edges made of cold rolled porous aluminum with special attention to the influence of cold rolling on the mechanical stability of the investigated materials

   • Jörn Tychsen
   • Joachim Rösler

   Original Paper Open access 31 May 2021 Pages: 573 - 587

   

10. Full configuration drag estimation of short-to-medium range fixed-wing UAVs and its impact on initial sizing optimization

    • F. Götten
    • D. F. Finger
    • C. Bil

    Original Paper Open access 10 June 2021 Pages: 589 - 603

    

11. Improving a real-time helicopter simulator model with linear input filters

    • Pavle Šćepanović
    • Frederik A. Döring

    Original Paper Open access 15 June 2021 Pages: 605 - 619

    

12. T-tail flutter simulations with regard to quadratic mode shape components

    • Dominik Schäfer

    Original Paper Open access 18 June 2021 Pages: 621 - 632

    

13. Aeroelastic wind tunnel model for tail buffeting analysis using rapid prototyping technologies

    • Lukas Katzenmeier
    • Cyrille Vidy
    • Christian Breitsamter

    Original Paper 21 June 2021 Pages: 633 - 651

    

14. PARE preliminary analysis of ACARE FlightPath 2050 environmental impact goals

    • Oleksandr Zaporozhets
    • Volodymyr Isaienko
    • Kateryna Synylo

    Original Paper 05 July 2021 Pages: 653 - 667

    

15. Evaluation of the aircraft fuel economy using advanced statistics and machine learning

    • S. Baumann
    • T. Neidhardt
    • U. Klingauf

    Original Paper Open access 19 June 2021 Pages: 669 - 681

    

16. Correction to: Evaluation of the aircraft fuel economy using advanced statistics and machine learning

    • S. Baumann
    • T. Neidhardt
    • U. Klingauf

    Correction 27 July 2021 Pages: 683 - 684

17. Review of variable leading-edge patents for aircraft wings and engine inlets and their relevance for variable pitot inlets in future supersonic transport

    • S. Kazula
    • K. Höschler

    Review Paper Open access 12 June 2021 Pages: 685 - 700