bm chassis pdr revision_jan30 (in progress2)
TRANSCRIPT
Brown and Miller Racing SolutionsModular Chassis
February 8, 2016
Changes made Increased structural integrity with support bars Changed front and rear clip tube dimensions Increased cockpit area Modularity Section connection type Torque Tube Containment
New ModelOld Model
Wheel Base 74” Length Chassis 100” Height 46” Width 28” top, 24” bottom Weight - 149 lb.
Wheel base 74” Length Chassis 104” Height 58” Width 34” Weight - 228 lb.
Chassis Size Comparison
Safety Increased height to 58 inches for more head clearance Increased cockpit width to 34 inches Added halo bar for penetrating protection Safer Torque Tube
containment Added supports on each
side for penetration and impact protection
Dirt Clips Asphalt Clips
Model ComparisonCurrent Model New Model
Maintaining tradition If properly enforced, our design offers increased safety and features
while keeping the look and style of current midget racing cars.
Implementation Resource Requirements
Welding/Welders (BMRS) Tube bending (BMRS) Machining Materials (BMRS)
Testing Drop/Impact Test Comparison Test between chassis
Documentation Changes need to be included in
a rule book Must be enforced by track
officials
Spring ProgressFront/Rear clip thickness
Changed from .095” to .083”Drawings
Updated current drawing with new dimensionsCompleted tube and connector drawings
Cut listMade cut list for all tubes
Cut list provides detailed dimensions to account for bending requirements
Modularity
Tapered interface create a rigid connection
Joints create a seamless and aesthetically pleasing connection
Bill of MaterialsITEM NO.
QUAN-TITY UNIT UNIT PRICE TOTAL PRICE
P G 1 SUB-TOTAL
245.44
125.31
41.96
10.78
DESCRIPTION
6.63 446.20
4.90 89.67
4.16
13.19
959.35
5.39
41.96
ft
2 -
4
6
1 -
184130 Chrome/Moly Tube - Round: 1" O.D. x .095" wall
Aluminum Sheet 6061 T6: .063" x 24" x 48"
High-Strength Grade 8 Steel Cap Screw 1/2"-20 Thread, 3" Long, Zinc-Plated Part #(91257A751)
4130 Chrome/Moly Tube - Round: 1-3/8" O.D. x .083" wall
Chrome/Moly Round Bar 4130 Normalized: 1-3/8"
59 ft
5
9.5 ft
3
1 67 ft 4130 Chrome/Moly Tube - Round: 1-3/8" O.D. x .095" wall
2
Major Upcoming Milestones
• Prototype Final Manufacturing – 3/4/16• Prototype Final Assembly – 3/18/16• Prototype Test – 3/25/16• Prototype Review Presentation – 4/1/16• Final Design Test – 4/15/16• Senior Design Expo – 5/5/16
Where we stand Fabrication
Materials purchasing Individual part files Welding CNC machining
Post-Fabrication Impact testing Old/new chassis comparison Full car completion (Body panel fabrication) Second car/multiple clips