May 22, 2002
Roadmaster Inc.
Tracker Towbar
(ATM) 5000# Towing Capacity

In accordance with Australian Design Rule 62/01.
Section 14.2.2

Linear Static Test performed utilizing MSCNastran FEA Analysis Software.

Load 1

Longitudinal Tension and Compression (Linear Static)
1.50 x 9.81 m/s? x 2267.57 kg = 33367.29 N
(1.50 x 32.17 ft/s? x 155.42 slugs = 7499.79 Lbs.)

Results

Total Translation / Deformation = 0.007 m (0.301 in.)

Contour Legend / Solid Mean Stress
See VIEW 37 / VIEW 38 / VIEW 39
Range / 4.43 x 105 to �3.15 x 105 kPa (64349 to �45768 psi)



 
View 37
 
View 38
 
View 39
 

											

												

											
												





 

		
   			 

		
		
		
Contour Legend Conversions:

psi			     kPa
64349			4.43 x 105
57466			3.96 x 105
50584			3.48 x 105
43702			3.01 x 105
36820			2.53 x 105
29937			2.06 x 105
23055			1.58 x 105
16173			1.11 x 105
9290			6.40 x 104
2408			1.66 x 104
        -4474		        -3.08 x 104
        -11357		        -7.83 x 104
        -18239		        -1.25 x 105
        -25121		        -1.73 x 105
        -32004		        -2.20 x 105
        -38886		        -2.68 x 105
        -45768		        -3.15 x 105
Load 1  Results (Con�t.)

Contour Legend / Solid Von Mises Stress
See VIEW 40 / VIEW 41 / VIEW 42
Range / 1.09 x 106 to 1.51 x 101 kPa (159059 to 2.199 psi)



 
View 40
 
View 41
 
View 42
 

											

												

											
												





 

		
   			 


		
		
Contour Legend Conversions:

psi			    kPa
         159059			1.09 x 106
         149117			1.02 x 106
         139176			9.59 x 105
         129235			8.91 x 105
         119294			8.22 x 105
         109353			7.54 x 105
         99412			6.85 x 105
         89471			6.16 x 105
         79530			5.48 x 105
         69589			4.79 x 105
         59648			4.11 x 105
         49707			3.42 x 105
         39766			2.74 x 105
         29825			2.05 x 105
         19884			1.37 x 105
         9943			6.85 x 104
         2.199			1.51 x 101
Load 2

Transverse Thrust @ 45? (Linear Static)
0.50 x 9.81 m/s? x 2267.57 kg = 11122.43 N
(0.50 x 32.17 ft/s? x 155.42 slugs = 2499.93 Lbs.)

Results

Total Translation / Deformation = 0.002 m (0.0804 in.)

Contour Legend / Solid Mean Stress
See VIEW 43 / VIEW 44 / VIEW 45
Range / 3.01 x 105 to �2.30 x 105 kPa (43697 to -33420 psi)



 
View 43
 
View 44
 
View 45
 

											

												

											
												





 

		
   			 


		
		
Contour Legend Conversions:

psi			    kPa
43697			3.01 x 105
38878			2.68 x 105
34058			2.34 x 105
29238			2.01 x 105
24418			1.68 x 105
19598			1.35 x 105
14779			1.01 x 105
9959			6.86 x 104
5139			3.54 x 104
319.1			2.20 x 103
        -4501		        -3.10 x 104
        -9320		        -6.42 x 104
        -14140		        -9.75 x 104
        -18960		        -1.30 x 105
        -23780		        -1.63 x 105
        -28600		        -1.97 x 105
        -33420		        -2.30 x 105
Load 2  Results (Con�t.)

Contour Legend / Solid Von Mises Stress
See VIEW 46 / VIEW 47 / VIEW 48
Range / 6.95 x 105 to 4.636 x 101 kPa (100799 to 4.636 psi)



 
View 46
 
View 47
 
View 48
 

											

												

											
												





 

		
   			 

		
		
		
Contour Legend Conversions:

psi			    kPa
         100799			6.95 x 105
         94500			6.51 x 105
         88200			6.08 x 105
         81900			5.64 x 105
         75601			5.21 x 105
         69301			4.77 x 105
         63001			4.34 x 105
         56702			3.91 x 105
         50402			3.47 x 105
         44102			3.04 x 105
         37803			2.60 x 105
         31503			2.17 x 105
         25203			1.73 x 105
         18904			1.30 x 105
         12604			8.69 x 104
         6304			4.34 x 104
         4.636			3.19 x 101

	 
	

Further Test Results

	
Tracker
 
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Falcon
 
	
Blackhawk
	
Sterling