EC750E dimensions

Scale can be a tricky thing when modeling with Lego. We are beholden to the stud width and size of stock parts such as linear actuators. I initially chose a scale of 1 stud = 6 inches as it made for an easy mental conversion of all the dimensions in the Volvo brochure, but this has not worked so well for the arm thickness where it is supposed to be 2'6" (5 studs) over its entire length. This was not possible because bracing and structure have the arm width sticking out to 7 studs. This could have been because I tried to build the shortest arm and a longer one would have had more room to maneuver. The other problem with the scale was that the single cylinder(lineal actuator) or the arm for the bucket had a very short travel and while I got it to perform the necessary 180 degree bucket rotation it wasn't especially strong. The scale was based on the 2'6" grouser fitting nicely with the 5 stud Lego grouser. If we continue to use the grouser for determining scale, the smaller 26" grouser increases the scale slightly to 5.2" per stud. The scaling multiplication factor is now 2.3077. This makes the new arm width of 5.77 studs (6 is close enough). Bracing and structure could be changed to use some thin liftarms to bring the width down to 6 studs. At this point the scaling factor is no longer as easy to calculate. Using the metric measurements it is simple to take the real measurement given and divide by 130 to get the dimension in studs(s). Below are the Volvo dimensions in studs using the 1:26 scale.

Overall dimensions
A Width of superstructure	26.3
B Width of upper structure	33
C Height of cab	27
D Tail swing radius	32
E Height of diffuser	29.5
Height of guard rail	31
Height of engine hood	27
Height of rain cap	29
Height of cyclone	29.5
Height of oil bath	31.5
F Counterweight clearance	11.5
G Tumbler length	36.5
H Track length	46
I Track gauge	26.5
J Shoe width(650mm)	5
K Min. ground clearance	6.6

Overall dimensions
Boom	6.6m (50s)	7.7m (59s)
Arm	2.9m (22s)	2.9m (22s)	3.55m (27s)	4.2m (32s)
L Overall length	94	102.5	101.5	101
M Height of folded boom	37.3	35.5	35.5	38

Boom	6.6m (50s)	7.7m (59s)
Length	53.5	62
Height	19.5	17
Width	8.5	8.5

Arm	2.9m (22s)	3.55m (27s)	4.2m (32s)
Length	33	38	43
Height	11	11	10.5
Width	6	6	6

Cylinder
Length	Height	Width
19.5	4	3

Counterweight
Length	Height	Width	Weight
26.3	13.5	5	12100kg (scaled to 93kg ??? that can't be right)

Shoes 650mm (5s)
Length	Height	Overall Width	Weight
46	10.5	8.3	10600kg (?g)

Cab
Length	Height of cab	Height of diffuser	Width	Weight
42.7	20.5	23	26.5	23150kg (scaled to ??g)
height of rain cap	22.5
height of cyclone	23
height of oil bath	25

Cab with shoes (650mm/5s width)
Length	Height of diffuser	Weight
52	29.5	44350kg (?g)

Cab with shoes (650mm/5s width) and boom
Boom	Length	Height of diffuser	Weight
6.6m (50s)	78.5	29.5	53090kg (?g)
7.7m (59s)	87.3	29.5	53480kg (?g)

Boom	6.6m (50s)	7.7m (59s)
Arm	2.9m (22s)	2.9m (22s)	3.55m (27s)	4.2m (32s)
A Max digging reach	88	97	101	106
B Max digging reach on ground	86	94.5	99	106
C Max digging depth	55.5	59.5	64.5	69.5
D Max digging depth l 2.4m(19s)/8' level	54.5	58	63.5	68.5
E Max vertical wall depth	43.5	52	57	61.5
F Max cutting height	84	95.5	97	99
G Max dumping height	54	65	66.5	69
H Min front swing radius	39.5	42	41.5	42