Presentation on theme: "E-Zapper Mobilized Support for destroying IED’s 1/C Emison, 1/C McHugh, 1/C Merrick, 1/C Schnappinger, 1/C Tang, 1/C White, 2/C Schwamberger Mentors: Prof."— Presentation transcript:
e-Zapper Mobilized Support for destroying IED’s 1/C Emison, 1/C McHugh, 1/C Merrick, 1/C Schnappinger, 1/C Tang, 1/C White, 2/C Schwamberger Mentors: Prof. Nelson, Prof. Ziegler, CDR Hamilton, USN, CDR Nolan, USN, Steve Andrews of Technical Options and Mr. Delikat Funded by ONR/EOD NSWC-Indian Head (Scott Stewart)
2007 Project Objective Mobilize the e-Zapper system Design a platform on which the e-Zapper can be mounted. Determine the Power Requirements to run the e-Zapper These objectives have been divided into three sub-teams Vehicle Dynamics Power Generation Heat Transfer and Radiation
Problem Statement Loading and unloading the e-Zapper unit onto a platform suitable for transporting the system
Vehicle Selection Options CostAvailabilityMaintenance Weight Capacity Space Available Highway Capable Military Compatibility Ease of Operat ion Total Points For Factor (Take times Vehicle Values)55599738 5 Ton Truck44576384259 Trailer66399758365 Refrigerated Truck55399655324 Values ExplanationRange Assigned Vehicle Values1 to 9 1: Low Performance 9: High Performance Factor1 to 9 1: Low Importance 9: High Importance
Loading and Unloading the e- Zapper Using a simple ramp and track system, the e-Zapper can be placed on the tracks and winched up and down the ramp.
The Concerns Weight distribution within the trailer The weight of the e-Zapper on the ramp The strength of the rollers used Aligning the rollers with the track The angle of approach and high centering The winch requirements Fabrication of a front end support for e- Zapper
The Ramp Selected Landsport company COMBO 40,000 lb. Capacity*, 16-foot Ramp Modular that doubles as 20,000 lb. Capacity Load Levelers (Plenty of strength to support e-Zapper) 4 segments, 8 feet long, 20 inches wide Price: $1995
The Rollers Swivel top roller dolly 5,000 lbs capacity each Steel 8 (length) x 6 (width) x 4.5 (height) in. $240.00 per roller 6 rollers needed
6.58 o 16’ ramp 23” vertical to the trailer bed Angle of Approach *Figure not to scale
Break Over Angle 42 o Giving a maximum angle of approach 48 o, without bottoming out on the interface of the ramp and the trailer bed. 22”
The Winch Requirements F_gravity F_sliding F_normal 16’ Ramp F_gravity= 9,200 lbs F_normal= F_gravity*cos(6.58)= 9,139 lbs F_sliding= F_gravity*sin(6.58)= 1,054 lbs F_total= 1785 lbs (F_sliding + F_static) *F_total is the force needed to move the e-Zapper up the ramp 6.58 o
Winch Requirements (cont’d) F_static friction=C_sf*F_normal =(0.08)*(9139)=731.12 lbs F_rolling friction=Crr*F_normal (0.05)*(9139)=457 lbs F_total=F_sliding+F_static friction (F_static friction is limiting factor) F_total=1785 lbs We will want to use a winch with a higher capacity so as to increase the speed of line and also make sure a certain level of safety is met.
The Front End Support The need to design and fabricate a support for the front end of the e-Zapper Must be the same width as the rear supports in order for the rollers to align with the track. Bending and compression stresses need to be taken into consideration.
Front End Support Attachment Location Existing Roller Attachment Location
Front End Support: Display of Loads and Restraints Front End Support: Display of Deflection Front End Support: Display of Safety Factor
Shopping List Trailer to specification Ramp Rollers Jack Stands (for trailer support when loading/unloading/no_e-Zapper situations) Jack (for use with jack stands) Winch
To Be Done Front Support –Already engineered, needs fabrication –To hold front end of e-Zapper –Load Distribution U-Track System –Necessary for alignment of e-Zapper during loading and unloading –Precision is vital (1/16” tolerance recommended)
Experiment Results Current In Amps Line ALine BLine C Standby454042 Firing8581 Max Current Drawn: 85 Amps
Basic e-Zapper Coolant System Schematic Sump Coolant Medium e-Zapper Coolant Medium Sump Heater Sump / heat exchanger Centrifugal pump e-Zapper *drawing not to scale
Chiller Specifications VendorModel Dimensions [in] Weight [lbs] Capacity (H2O) [kW] Capacity (50/50 gly/H2O) [kW] Electric Load [V] Cost [$] LiebertPS096A77x69.25x38.575025.2 21 23015,490 General Air Products05029.3x53.1x42.947316.7 13.92 4608052 Cold Shot Chillers ACWC-60- E32x43x6050017.58 14.65 4606465 CHILLER TEMPERATURE REQUIREMENT: 13.3 kW
Ranking Factors for Chiller Selection For Chillers: 1=worst, 9=best For Factors: higher number=more important For Total: Higher number=best choice Cost Size (dimensions)Weight Electrical Load Cooling Capacity Total Liebert21199 4.65 General Air Products59962 5.20 ColdShot87766 6.30 weight of each factor0.5110.252