4. DEFENSE IN DEPTH PHILOSOPHY – Our approach to safe and reliable operation

7. Flywheel Topologies

8. Range of CEM Flywheel Systems Designs Lab Bearing Amps Flywheel Transformer Rectifier Assembly Lab Safety Disconnect Converter Transit Bus Flywheel 150 kW (peak), 100 kW (cont.), 2 kW-h Advanced Locomotive Propulsion System Flywheel 3 MW (peak), 2 MW (cont.), 100 kW-h Combat Hybrid Power Systems (CHPS) Flywheel 5 MW (peak), 350 kW (cont.), 7 kW-h Space Station Flywheel (FESS) 5.0 kW (peak), 3.66 kW (cont.), 3.66 kW-h

12. Coupon-Level Characterization Single cycle hydroburst fixture Fatigue cycle hydroburst fixture Hydroburst specimen Fixtures can be configured for elevated temperature testing

14. Typical Stress Allowables (Past Composite Program)

15. Component-Level Characterization Arbor spin test Arbor static deflection test Rotordynamics Testing: Modal frequency test

17. Final Prototype Build and Commissioning Tests Final 2 Arbors In process winding of an arbor pair BUILD Rotor shafts with structural and cooling arbor assemblies installed FINAL PRODUCT In process winding of a B2 outer banding Twin rotors shown in incomplete assembly state ( some outer banding assemblies remain)

20. CEMWIND Outputs CEMWIND FE Mesh & Material Property Files Arbor Ply Thickness Build Profile Fiber motion files for input into CEM’s filament winding machine

21. CEMWIND Output Showing Arbor Shear Stress Profile Outputs ply-level stress and strain results. Direct comparison with fiber tow-level material allowables Arbor Stresses at 50 Krpm: Shear Stress Profile