Revision as of 20:34, 10 January 2012

Use same frame as LifeTrac with modifications
- LifeTrac is 4"x4"x1/4" tubing, the bulldozer should be 4x4x1/2" for design redundancy compared to the LifeTrac platform
Vehicle weight should be approximately 20,000 lb, with modular concrete blocks providing the remainder of the necessary weight
- Metal frame should be a space frame to save materials while providing necessary structural stability
8 foot wide blade
Use 4 Power Cubes for 128 hp of tractor power
- Use 2 Power Cubes per side to simplify hydraulic plumbing requirements
3000 psi hydraulic system pressure
Cushion Valve on each wheel
15,000 inch pound hydraulic motor on each wheel
- Each wheel has 6-fold gear reduction via Jackshaft
- Jack shaft uses heavy chain and sprockets
- Number of jackshafts is 3 for the gearbox; oil-enclosed gear box
30 gpm quick couplers on motors, valves, and cylinders
Use metal wheels as in Traction Engines
30" diameter wheels, can be as wide as required to achieve desired traction
Use 4-flange pillow block bearings with quick-disconnect wheels - see Quick Connect Wheels strategy for LifeTrac
Use 3" shaft
3" bearings - https://www.surpluscenter.com/item.asp?item=1-215-48-4-C&catname=powerTrans
4 wheel drive
Must use bolt-through wheel attachment to shaft as in LifeTrac, for maximum wheel mounting simplicity
Complete materials cost estimate of under $16k in materials, not counting
20,000 pound gross vehicle weight, weighed down with modular concrete weights
24,000 lb of pushing force

Challenges

Low cost ($20/linear foot for jackshaft [x3], sprocket for #100 chain - , chain - $6/foot or 9 feet total

3 separate design challenge for:
- Main structure - frame, wheels, power cube mounts, hydraulic controls
- 6-way Blade and fabrication procedure for it, inlcuding fabrication procedure for 8' shop press using 5"x20"x2.5" Cylinders
- 5-fold Gear reduction mechanism via jackshaft and roller chain
All points are negotiable provided compliance with OSE Specifications

@@ Line 1: / Line 1: @@
 *Use same frame as [[LifeTrac]] with modifications
 **LifeTrac is 4"x4"x1/4" tubing, the bulldozer should be 4x4x1/2" for design redundancy compared to the [[LifeTrac]] platform
-*Mass should be approximately 20,000 lb, with modular concrete blocks providing the remainder of the necessary weight
+*Vehicle weight should be approximately 20,000 lb, with modular concrete blocks providing the remainder of the necessary weight
-**Metal frame should be minimal
+**Metal frame should be a space frame to save materials while providing necessary structural stability
 *8 foot wide blade
 *Use 4 [[Power Cubes]] for 128 hp of tractor power