LSD 41 to CVU Conversion LT Carl Bodin LT Katie Gerhard LTJG - PowerPoint PPT Presentation

LSD 41 to CVU Conversion LT Carl Bodin LT Katie Gerhard LTJG Kostas Nestoras 2.704 Projects in Naval Ship Conversion Design IAP 2012 1

Unmanned Vehicles: A new type of Soldier, Sailor, and Marine On Land In the Air At Sea 2

The vision… 3

Sponsors • We would like to thank the following people who sponsored this project and assisted the team: – Mr. Jeffrey Smith, Director of Future Ship and Force Architecture Concepts, Division NAVSEA 05D – Mr. Steven Wynn, NAVSEA 05D Problem Statement: “Convert an LSD to angled flight deck UAV and USV carrier” 4

UAV Options High: Example: Global Hawk Wingspan: 116 feet Payload: 4400 lbs. Medium: Example: MQ-9 Reaper Wingspan: 66 feet Payload: 3800 lbs Low: Example: Scan Eagle Wingspan: 10 feet Payload: 11 lbs 5

USV Options High: Example: Shadow Length: 39 feet Payload: 5000 lbs. Medium: Example: Spartan Scout Length: 36 feet Payload: 3000 lbs. Low: Example: Stingray Length: 12 feet Payload: 300 lbs. 6

Launching System • Three variants: – EMALS – Steam Catapult – None/mobile units 7

Configuration of the Flight Deck • Straight runway • Angled runway • Two runways • Ski jump option 8

Other Design Parameters • Ship’s (Max) Speed – Low: 20 kts – Medium: 25 kts – High: 30 kts • Ship’s Motion – Fin Stabilizers – No assistance • Number of UAV/USV – High, Medium, Low 9

Design Philosophy Convert the LSD 41 into a CVU (Unmanned Aerial and Surface Vehicle Carrier) • Emphasizing UAV capabilities over USV • Maximizing performance for the lowest cost • Accepting higher risk to gain new capability 10

Decision Framework • Weighted Sum and AHP Design Initial Number Final Number of Parameters of options options decreased variant combinations UAV Capability 3 2 Number of UAVs 3 2 from 8748 to 64 and then to the Configuration of 6 2 final variant Flight Deck Catapult System 3 1 • Team member experience and Ship's Motion 2 1 Control sponsor (weighted) inputs Ship's Speed 3 2 USV Capability 3 2 Number of USVs 3 2 Variant USV Capability USV Number # 2 Medium Medium #2 #12 # 12 Medium Low #16 # 16 Low Low • Final Variant: UAV Capability Medium USV Number Low UAV Number Medium Ship Speed Medium Flight Deck Angled Catapult System EMALS Ship's Motions USV Capability Medium Fin Stabilizers Control 11

Topside View Runway Stack Ku-band SATCOM EMALS UAV ramp CIWS RAM Arresting Wires Stack RAM CIWS Ku-band SATCOM UAV UAV Elevator 12

Internal Arrangement 13

USV Bay/ Well Deck 14

New SSDG Location 15

Stability - CVU has lower KG and higher GM, making it more stable - Within the roll period of DDG 51 and CVN Ship KG GMt Draft CVU 31.97 12.52 17.99 LSD 41 Hull LSD 37.2 8.1 19.5 18

CVU Seakeeping Sea State 4 Sea State 5 Conditions selected were the worst identified in each sea state Wave Characteristic NO ski jump Sea State Height [m (ft)] 4 2.26 (7.41) 5 3.53 (11.58) 6 6.16 (20.21) WITH ski jump • Assessment based on STANAG 4154 • Analysis made with MAXSURF suite • Ski Jump enhanced the operability of CVU and increased her flight operations envelope • Full flight operation can be conducted up to SS5 Overall Stability Profiles (Full Load) • At SS6 only launch operations can be conducted • Effects of fin stabilizers not considered 19

Strength - Stress meets all requirements in the DDS-100-1 (<8.5 LT/in 2 for a combatant) - Hangar bay deck considered in strength calculations 20

Cost Estimation • Modified 2N Cost Model – Weight Based Cost estimation – Sponsors provided CERs • Base conversion cost calculated, GFE added in separately • Cost Estimations – Base conversion: $95M (FY11$) – GFE cost: $159M (FY11$) for 19 consoles – Total: $254 (FY11$) 21

Summary • Team & Sponsor Goals met CVU Characteristics Value Units Length Overall 610 ft – Enhanced UAV capability Beam 84 ft Draft (Full Load) 17.6 ft – Angled flight deck Installed Power 6500 kW Light Ship Displacement 11,041 LT – Room for future growth Full Load Displacement 14,255 LT – Met 2N Convergence criteria Sustained Speed 23 kts Maximum Speed 25 kts Endurance 18 kts Number of UAV 20 Type of UAV MQ ‐ 9 Reaper Number of USV 9 Type of USV Spartan Scout C P 0.604 C B 0.571 C X 0.946 22