Designing Folding Wing Mechanisms for Drones

1. Excessive transport volume of rigid propulsion armsTelescopic & Rotational Structures124 documents (23%)
2. Bulky drone arm storage during transportTelescopic & Rotational Structures78 documents (14%)
3. Excessive storage volume for tube launched aircraftTelescopic & Rotational Structures71 documents (13%)
4. Wing structural instability during rapid deploymentTelescopic & Rotational Structures49 documents (9%)
5. Insufficient unfolding force for large aspect wingsMechanical Linkages & Actuators45 documents (8%)
6. VTOL transition instability during wing deploymentTelescopic & Rotational Structures26 documents (5%)
7. Unstable wing positioning during cruise flightMechanical Linkages & Actuators24 documents (4%)
8. Asymmetric wing deployment during rapid launchMechanical Linkages & Actuators19 documents (4%)
9. Complex wing deployment from launch tubesTelescopic & Rotational Structures18 documents (3%)
10. Limited storage space for high capacity solar arraysMission-Specific Folding Systems14 documents (3%)
11. Wing root kinematic aerodynamic instabilityOrigami & Bistable Morphing5 documents (1%)
12. Stowage inefficiency during micro vehicle transportOrigami & Bistable Morphing5 documents (1%)
13. Mechanical complexity of active spanwise wing foldingBio-mimetic & Flapping Kinematics4 documents (1%)
14. Bulkiness during autonomous drone transit phasesMission-Specific Folding Systems4 documents (1%)
15. Inefficient ground to air transition for flapping robotsBio-mimetic & Flapping Kinematics3 documents (1%)

Largest 15 of 43 problems