Superleggera Weight Estimate

Weights are in kg. Moments and levers are about the CAD drawing origin (550mm behind back of trailer).

If you would like to view/save the original Excel 97 spreadsheet, download it here.

If you would like an explanation of this table, go here.

 

 

 

 

 

Unit

Units

Weight

Line

 

Line 

Category

Category

Category

Item

No off

Material

Unit

weight

each

each

Weight

Lever

Moment

Weight

Moment

 

 

 

 

 

kg/unit

unit

kg

kg

m

kg-m

kg

kg-m 

Chassis

 

 

 

 

 

 

 

 

 

 

 

 

Structure

Axle tube

1

50x50x3 SHS

m

4.66

1.23

5.73

5.73

1.53

8.74

 

 

 

Susp mount plates

2

6 plate

m2

47.10

0.015

0.72

1.43

1.53

2.18

 

 

 

Longitudinals

2

50x50x3 RSA

m

2.30

3.00

6.90

13.80

2.39

32.98

 

 

 

Hitch mount

1

50x50x3 SHS

m

4.66

0.13

0.61

0.61

3.84

2.32

21.57

46.23

 

 

 

 

 

 

 

 

 

 

 

 

 

Fittings

Susp units

2

guess

ea

5

1

5.00

10.00

1.50

14.95

 

 

 

Wheel/tyres

2

guess

ea

5

1

5.00

10.00

1.46

14.60

 

 

 

Hitch

1

guess

ea

1

1

1.00

1.00

3.92

3.92

21.00

33.47

 

 

 

 

 

 

 

 

 

 

 

 

 

Base

Ply base

1

12 ply

m2

7.8

2.765

21.56

21.56

1.70

36.66

 

 

 

Side framing

2

44x44

m

1.16

0.933

1.08

2.16

1.02

2.21

 

 

 

Side framing

2

44x44

m

1.16

1.252

1.45

2.90

2.17

6.30

 

 

 

Cross members

4

44x44

m

1.16

1.114

1.29

5.17

1.77

9.15

 

 

 

Bolts, say

10

 

 

0.2

1

0.20

2.00

1.80

3.60

33.80

57.92

 

 

 

 

 

 

 

 

 

 

 

 

 

Sides

Side + door - window

2

9 ply

m2

5.8

2.398

13.91

27.82

2.00

55.63

 

 

 

Edge framing

2

12 ply

m2

7.8

0.127

0.99

1.97

2.20

4.34

 

 

 

Door jamb back

2

9 ply

m2

5.8

0.056

0.32

0.65

1.85

1.20

 

 

 

Door jamb front

2

9 ply

m2

5.8

0.053

0.31

0.61

2.50

1.54

 

 

 

Door jamb bottom

2

9 ply

m2

5.8

0.041

0.24

0.48

2.13

1.02

 

 

 

Door jamb top

2

9 ply

m2

5.8

0.031

0.18

0.36

2.13

0.77

31.89

64.50

 

 

 

 

 

 

 

 

 

 

 

 

 

Top

 

 

 

 

 

 

 

 

 

 

 

 

Fixed top

Main ply

1

3 ply

m2

1.9

3.399

6.46

6.46

2.60

16.79

 

 

 

Cross beams

7

33x33

m

0.65

1.178

0.77

5.36

2.50

13.40

 

 

 

Aft cross beam

1

ex 66x33

m

1.3

1.178

1.53

1.53

1.31

2.01

 

 

 

Lid closing piece

1

33x33

m

0.65

1.202

0.78

0.78

0.63

0.49

14.13

32.69

Galley Lid

Lid ply

1

3 ply

m2

1.9

1.793

3.41

3.41

0.80

2.73

 

 

 

Lid longl frames

4

2 x 9 ply

m2

11.6

0.073

0.84

3.36

0.80

2.69

 

 

 

Lid top beam

1

ex 66x33

m

1.3

1.182

1.54

1.54

1.27

1.95

 

 

 

Lid bottom beam

1

50x33

m

0.99

1.182

1.17

1.17

0.59

0.68

9.48

8.05

 

 

 

 

 

 

 

 

 

 

 

 

 

Internals

Galley divider

1

9 ply

m2

5.8

0.135

0.78

0.78

0.86

0.67

 

 

 

Lower bulkhead

1

9 ply

m2

5.8

0.590

3.42

3.42

1.00

3.42

 

 

 

Galley worktop

1

9 ply

m2

5.8

0.691

4.01

4.01

0.99

3.97

 

 

 

Upper bulkhead

1

9 ply

m2

5.8

0.760

4.41

4.41

1.30

5.73

 

 

 

Galley shelves

2

9 ply

m2

5.8

0.210

1.22

2.44

1.20

2.93

 

 

 

Shelf divider

1

9 ply

m2

5.8

0.067

0.39

0.39

1.20

0.47

 

 

 

Locker base

1

9 ply

m2

5.8

0.472

2.74

2.74

1.50

4.11

 

 

 

Locker front

1

9 ply

m2

5.8

0.654

3.79

3.79

1.70

6.45

 

 

 

Overhead base

1

9 ply

m2

5.8

0.357

2.07

2.07

2.75

5.69

 

 

 

Overhead front

1

9 ply

m2

5.8

0.377

2.19

2.19

2.60

5.69

 

 

 

Joining fillets

9

21x21

m

0.26

1.202

0.31

2.81

1.75

4.92

29.05

44.05

 

 

 

 

 

 

 

 

 

 

 

 

 

Mudguards

 

2

 

ea

2.5

1

2.50

5.00

1.40

7.00

5.00

7.00

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Subtotal

 

165.93

293.91

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Margin

5%

8.30

14.70

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Total LCG

1.771

 

 

Total

 

174.2

308.6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LCG of wheels

1.459

a

 

Weight on wheels

 

152.8

88%

 

 

 

 

 

LCG of hitch

3.995

b

 

Weight on hitch

 

21.5

12%

 

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