May 8, 2002						
Roadmaster Inc.
Blackhawk Towbar
(ATM) 8000# 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 3628.11 kg = 53387.63 N
(1.50 x 32.17 ft/s? x 248.67 slugs = 11999.57 Lbs.)

Results

Total Translation / Deformation = 0.0012 m (0.0473 in.)

Contour Legend / Solid Mean Stress
See VIEW 1 / VIEW 2 / VIEW 3   Click on thumbnail for large view
Range / 1.80 x 105 to -2.13 x 105 kPa (26148 to –30993 psi)


 
View 1
 
View 2
 
View 3
 

											

												

											
												





 
				 
				 
				 

		
   			 


Contour Legend Conversions:

psi			     kPa
26148			1.80 x 105
22576			1.55 x 105
19005			1.30 x 105
15434			1.06 x 105
11863			8.18 x 104
8291			5.71 x 104
4720			3.25 x 104
1149			7.92 x 103
        -2422		        -1.67 x 104
        -5994		        -4.13 x 104
        -9565		        -6.59 x 104
        -13136		        -9.05 x 104
        -16707		        -1.15 x 105
        -20279		        -1.39 x 105
        -23850		        -1.64 x 105
        -27421		        -1.89 x 105
        -30993		        -2.13 x 105
Load 1  Results (Con’t.)

Contour Legend / Solid Von Mises Stress
See VIEW 4 / VIEW 5 / VIEW 6   Click on thumbnail for large view
Range / 6.67 x 105 to 1.39 x 102 kPa (96774 to 20.28 psi)

 
View 4
 
View 5
 
View 6
 

											

												

											
													





 
				 
				 
				 

		
   			 


Contour Legend Conversions:

psi			    kPa
96774			6.67 x 105
90726			6.25 x 105
84679			5.83 x 105
78632			5.42 x 105
72585			5.00 x 105
66538			4.58 x 105
60491			4.17 x 105
54444			3.75 x 105
48397			3.33 x 105
42350			2.92 x 105
36303			2.50 x 105
30256			2.08 x 105
24209			1.66 x 105
18162			1.25 x 105
12114			8.35 x 104
6067			4.18 x 104
20.28			1.39 x 102
Load 2

Transverse Thrust @ 45? (Linear Static)
0.50 x 9.81 m/s? x 3628.11 kg = 17795.87 N
(0.50 x 32.17 ft/s? x 248.67 slugs = 3999.85 Lbs.)

Results

Total Translation / Deformation = 0.0058 m (0.229 in.)

Contour Legend / Solid Mean Stress
See VIEW 7 / VIEW 8 / VIEW 9   Click on thumbnail for large view
Range / 1.11 x 105 to –1.82 x 105 kPa (16214 to –26479 psi)

 
View 7
 
View 8
 
View 9
 

											

												

											
												





 
				 
				 


				 

		
   			 
Contour Legend Conversions:

psi			     kPa
16214			1.11 x 105
13546			9.34 x 104
10878			7.50 x 104
8209			5.66 x 104
5541			3.82 x 104
2873			1.98 x 104
204.2			1.40 x 103
        -2464		        -1.69 x 104
        -5132		        -3.53 x 104
        -7801		        -5.37 x 104
        -10469		        -7.21 x 104
        -13137		        -9.05 x 104
        -15806		        -1.08 x 105
        -18474		        -1.27 x 105
        -21142		        -1.45 x 105
        -23811		        -1.64 x 105
        -26479		        -1.82 x 105
Load 2  Results (Con’t.)

Contour Legend / Solid Von Mises Stress
See VIEW 10 / VIEW 11 / VIEW 12  Click on thumbnail for large view
Range / 7.55 x 105 to 7.21 x 101 kPa (109507 to 10.46 psi)

 
View 10
 
View 11
 
View 12
 

											

												

											
											





 
				 


				 
				 

		
   			 
Contour Legend Conversions:

psi			    kPa
109507		7.55 x 105
102663		7.07 x 105
95820			6.60 x 105
88976			6.13 x 105
82133			5.66 x 105
75289			5.19 x 105
68446			4.72 x 105
61602			4.24 x 105
54759			3.77 x 105
47915			3.30 x 105
41072			2.83 x 105
34228			2.36 x 105
27384			1.88 x 105
20541			1.41 x 105
13697			9.44 x 104
6854			4.72 x 104
10.46			7.21 x 101




Further Test Results

Tracker
 
Stowmaster 
  
Falcon
 
	
Blackhawk
	
Sterling