Please solve this question. Subject: Transportation engineering Fillet Radius Problem (Airport Engineering)Determine the minimum lead-in and the radius of the fillet (and compare with recommended values) to maintain the cockpit over the centerline for an aircraft with a 110.3 ft wingspan, a wheelbase of 40.5 ft, undercarriage width of 25.5 ft, and the distance between the main undercarriage and cockpit equal to 50.4 ft. The aircraft is moving between two parallel taxiways through a connecting taxiway which has a centerline perpendicular to the parallel taxiway.With a wingspan of 110.3 ft this aircraft is in airplane design group III (see table 6- 2). From Table 6-23 and Table 6-18, the taxiway width is 50 ft, the minimum safety margin is 10 ft, the recommended centerline radius is 100 ft. Airplane Design GroupIIIIIVVVIWidth2535507575100Edge safety marginº7510151520Shoulder width101020253540Safety areawidth4979118171214262Object-free area widthTaxiway89131186259320386Taxilane79115162225276334SeparationsTaxiway centerline totaxiway centerline*69105152215267324fixed or movable44.562.593129.5160193objectTaxilane centerline totaxilane centerline6497140198245298fixed or movable39.557.581112.5138167object"For airplanes in airplane design group III with a wheelbase equal to or greater than 60 ft,the standard taxiway width is 60 ft.'The taxiway edge safety margin is the minimum acceptable between the outside of theairplane wheels and the pavement edge.For airplanes in airplane design group III with a wheelbase equal or greater than 60 ft,the taxiway edge safety margin is 15 ft."Airplanes in airplane design groups V and VI normally stabilized or paved taxiwayshoulder surfaces.May use aircraft wingspan in lieu of these values.May use 1.4 wingspan plus 20 ft in lieu of these values.May use 1.2 wingspan plus 20 ft in lieu of these values.'May use 1.2 wingspan plus 10 ft in lieu of these values.'May use 0.7 wingspan plus 10 ft in lieu of these values.'May use 1.1 wingspan plus 10 ft in lieu of these values."May use 0.6 wingspan plus 10 ft in lieu of these values.Source: Federal Aviation Administration [6].TABLE 6-18 Taxiway Dimensional Standards, ft Airplane Design GroupItemDim.IVVVIRadius oftaxiway turnR7575100150150170Length of lead- Lin to fillet5050150250250250Fillet radiusfor trackingcenterline605555858585Fillet radiusF62.557.568105105110for judgmentaloversteeringsymmetricalwideningFillet radius for Fjudgmental62.557.5609797100Oversteeringone sidewidening"Letters correspond to the dimensions on Fig. 6-35.'Airplanes in airplane design group III with a wheelbase equal to or greater than 60 ftshould use a fillet radius of 50 ft."Dimensions for taxiway fillet designs relate to the radius of taxiway turm specified.The center sketch of Fig. 6-35 displays pavement fillets with symmetrical taxiwaywidening.The lower sketch of Fig. 6-35 displays a pavement fillet with taxiway widening on oneside.TABLE 6-23 FAA Taxiway Curvature Dimensional Standards, ftGroup NumberTail Height, ftWingspan, ft<20<49II20-<3049-<79II30-<4579-118IV45-<60118-<171V60-<66171-214VI66-<80214-<262TABLE 6-2 Aircraft Design Groups

Given ?=50.4 ft, ?=40.5 ft, ?=25.5 ft design group III (110.3 ft wingspan) (Table 6-2) centerline…

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Please solve this question. Subject: Transportation engineering Fillet Radius Problem (Airport Engineering) Determine the minimum lead-in and the radius of the fillet (and compare with recommended values) to maintain the cockpit over the centerline for an aircraft with a 110.3 ft wingspan, a wheelbase of 40.5 ft, undercarriage width of 25.5 ft, and the distance between the main undercarriage and cockpit equal to 50.4 ft. The aircraft is moving between two parallel taxiways through a connecting taxiway which has a centerline perpendicular to the parallel taxiway. With a wingspan of 110.3 ft this aircraft is in airplane design group III (see table 6- 2). From Table 6-23 and Table 6-18, the taxiway width is 50 ft, the minimum safety margin is 10 ft, the recommended centerline radius is 100 ft.

Airplane Design Group
II
II
IV
V
VI
Width
25
35
50
75
75
100
Edge safety marginº
75
10
15
15
20
Shoulder width
10
10
20
25
35
40
Safety area
width
49
79
118
171
214
262
Object-free area width
Taxiway
89
131
186
259
320
386
Taxilane
79
115
162
225
276
334
Separations
Taxiway centerline to
taxiway centerline*
69
105
152
215
267
324
fixed or movable
44.5
62.5
93
129.5
160
193
object
Taxilane centerline to
taxilane centerline
64
97
140
198
245
298
fixed or movable
39.5
57.5
81
112.5
138
167
object
"For airplanes in airplane design group III with a wheelbase equal to or greater than 60 ft,
the standard taxiway width is 60 ft.
'The taxiway edge safety margin is the minimum acceptable between the outside of the
airplane wheels and the pavement edge.
For airplanes in airplane design group III with a wheelbase equal or greater than 60 ft,
the taxiway edge safety margin is 15 ft.
"Airplanes in airplane design groups V and VI normally stabilized or paved taxiway
shoulder surfaces.
May use aircraft wingspan in lieu of these values.
May use 1.4 wingspan plus 20 ft in lieu of these values.
May use 1.2 wingspan plus 20 ft in lieu of these values.
'May use 1.2 wingspan plus 10 ft in lieu of these values.
'May use 0.7 wingspan plus 10 ft in lieu of these values.
'May use 1.1 wingspan plus 10 ft in lieu of these values.
"May use 0.6 wingspan plus 10 ft in lieu of these values.
Source: Federal Aviation Administration [6].
TABLE 6-18 Taxiway Dimensional Standards, ft

Airplane Design Group
Item
Dim.
IV
V
VI
Radius of
taxiway turn
R
75
75
100
150
150
170
Length of lead- L
in to fillet
50
50
150
250
250
250
Fillet radius
for tracking
centerline
60
55
55
85
85
85
Fillet radius
F
62.5
57.5
68
105
105
110
for judgmental
oversteering
symmetrical
widening
Fillet radius for F
judgmental
62.5
57.5
60
97
97
100
Oversteering
one side
widening
"Letters correspond to the dimensions on Fig. 6-35.
'Airplanes in airplane design group III with a wheelbase equal to or greater than 60 ft
should use a fillet radius of 50 ft.
"Dimensions for taxiway fillet designs relate to the radius of taxiway turm specified.
The center sketch of Fig. 6-35 displays pavement fillets with symmetrical taxiway
widening.
The lower sketch of Fig. 6-35 displays a pavement fillet with taxiway widening on one
side.
TABLE 6-23 FAA Taxiway Curvature Dimensional Standards, ft
Group Number
Tail Height, ft
Wingspan, ft
<20
<49
II
20-<30
49-<79
II
30-<45
79-118
IV
45-<60
118-<171
V
60-<66
171-214
VI
66-<80
214-<262
TABLE 6-2 Aircraft Design Groups

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