Widebody heights
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Widebody heights
Trying to compare the heights of sundry widebodies...
The original, 747-100 can be found at
http://www.boeing.com/commercial/air...s/7471sec2.pdf
The distance from ground to belly is in the range of 188 to 208 cm for classical 747-s - except for 747SP, which stands taller, the landing gear of 747SP is higher and the underbelly is higher from ground than on 747 classic. Ground to underbelly is 226 to 246 cm on SP.
Any reason why?
The next widebody, DC-10 can be found at
http://www.boeing.com/commercial/air...s/dc10sec2.pdf
It stands taller than 747 - normally about 225 cm, and up to 254 cm depending on loading.
Havenīt been able to find descriptions of Tristar or A300. As for A310, see
http://www.content.airbusworld.com/S...LT/AC_A310.pdf
The height is 184 to 196 cm for -200 and 180 to 194 cm for -300.
Boeing 767 is described at
http://www.boeing.com/commercial/air...ps/767sec2.pdf
Ground to bottom is 173 to 206 cm, for -200
Also note that 767, unlike 310, is double bubble. 767 is 61 cm narrower than 310, but only 23 cm lower.
A330 can be found at
http://www.content.airbusworld.com/S...LT/AC_A330.pdf
Note that for A330, Airbus offers jacked height, too.
Laden, with forward CoG, A330-300 stands 195 cm from ground.
777-200 can be found at
http://www.boeing.com/commercial/air...s/7772sec2.pdf
The belly height is not given here at all. The roof height is between 839 and 868 cm, and fuselage height is 620 cm, so the plane stands at least 218 cm from ground.
And now have a look at A380
http://www.content.airbusworld.com/S...LT/AC_A380.pdf
Observe that the middle of the fuselage is just 166 cm from ground at MRW, while rear fuselage is 224 cm and front fuselage as high as 240 cm with aft CoG.
Is A380 unique among other widebodies in having the middle so much below the rest of fuselage?
As for the belly door sills...
For classic 747, the height is 264 to 325 cm for front door and 269 to 315 cm for rear door.
On DC-10, the height is around 277 cm for front door, around 267 cm for rear door.
On empty A310-300, the heights are 262 cm for front door, 270 cm for rear door.
On 767-200, the heights are 226 cm for both doors.
On A330-300, the heights are 255 and 322 cm respectively.
On 777-200, the heights are 281 and 322 cm respectively.
On A380, the heights are 310 and 311 cm respectively.
DC-10 lower deck sills are about 42 and 52 cm above fuselage bottom. Hard to figure out exactly.
For A310, the distances are 68 and 76 cm.
For B767-200, both are about 53 cm above bottom
On A330, thanks to the measurements of jacked plane, the data can be exact. The front door is 46 cm above belly, rear door 56 cm above belly.
On 777-200, the front door is about 62 cm above belly, rear door about 103 cm above belly.
On A380 (jacked), front door is 71 cm above front belly and rear door is 85 cm above rear belly.
Maindeck doorsills on 747 classics have minimum heights from 457 to 478 cm.
On DC-10, the nominal doorsill heights are 480 to 465 cm.
On empty A310-300, the heights are 455 to 480 cm.
On 767-200, the minimum sill heights are 406 to 409 cm.
On empty A330-300, the heights are 455 to 577 cm.
On 777-200, the minimum heights are 471 to 528 cm.
On laden A380, the heights are 512 to 514 cm.
The distance from the sill of front cargo door of DC-10 to the sill of main deck door above is 201 cm. From rear cargo door to main deck door above, 198 cm.
See the implications here. About 200 cm floor to floor. The headroom in underbelly is less than this by the thickness of the main deck. 167 cm on DC-10. Not enough for a stand-up cabin.
On A310, the front maindeck door is 193 cm above belly door, and rear maindeck door is 210 cm above belly door. So, similar range. Headroom is for 163 cm pallets and containers - not standing humans.
On B767, the front maindeck door is 183 cm above belly door, and rear maindeck door is 180 cm above.
On A330 (jacked), the front maindeck doors are 218 cm above belly door, and rear maindeck doors are 219 to 229 cm above belly door. The front underbelly is 171 cm high, rear underbelly 167 cm.
On 777-200, the front maindeck doors are 190 to 207 cm above underbelly door, and the rear doors are 192 to 206 cm above.
On a jacked A380, maindeck doors are 203 cm above belly doors.
The upper deck door on 747-300 has minimum height of 757 cm.
On a laden A388, the upper deck doors are 788 to 789 cm high.
On 747-300, the upper deck door is about 292 cm above the main deck door below.
On a jacked A380, upper deck doors are 275 cm above main deck doors.
The original, 747-100 can be found at
http://www.boeing.com/commercial/air...s/7471sec2.pdf
The distance from ground to belly is in the range of 188 to 208 cm for classical 747-s - except for 747SP, which stands taller, the landing gear of 747SP is higher and the underbelly is higher from ground than on 747 classic. Ground to underbelly is 226 to 246 cm on SP.
Any reason why?
The next widebody, DC-10 can be found at
http://www.boeing.com/commercial/air...s/dc10sec2.pdf
It stands taller than 747 - normally about 225 cm, and up to 254 cm depending on loading.
Havenīt been able to find descriptions of Tristar or A300. As for A310, see
http://www.content.airbusworld.com/S...LT/AC_A310.pdf
The height is 184 to 196 cm for -200 and 180 to 194 cm for -300.
Boeing 767 is described at
http://www.boeing.com/commercial/air...ps/767sec2.pdf
Ground to bottom is 173 to 206 cm, for -200
Also note that 767, unlike 310, is double bubble. 767 is 61 cm narrower than 310, but only 23 cm lower.
A330 can be found at
http://www.content.airbusworld.com/S...LT/AC_A330.pdf
Note that for A330, Airbus offers jacked height, too.
Laden, with forward CoG, A330-300 stands 195 cm from ground.
777-200 can be found at
http://www.boeing.com/commercial/air...s/7772sec2.pdf
The belly height is not given here at all. The roof height is between 839 and 868 cm, and fuselage height is 620 cm, so the plane stands at least 218 cm from ground.
And now have a look at A380
http://www.content.airbusworld.com/S...LT/AC_A380.pdf
Observe that the middle of the fuselage is just 166 cm from ground at MRW, while rear fuselage is 224 cm and front fuselage as high as 240 cm with aft CoG.
Is A380 unique among other widebodies in having the middle so much below the rest of fuselage?
As for the belly door sills...
For classic 747, the height is 264 to 325 cm for front door and 269 to 315 cm for rear door.
On DC-10, the height is around 277 cm for front door, around 267 cm for rear door.
On empty A310-300, the heights are 262 cm for front door, 270 cm for rear door.
On 767-200, the heights are 226 cm for both doors.
On A330-300, the heights are 255 and 322 cm respectively.
On 777-200, the heights are 281 and 322 cm respectively.
On A380, the heights are 310 and 311 cm respectively.
DC-10 lower deck sills are about 42 and 52 cm above fuselage bottom. Hard to figure out exactly.
For A310, the distances are 68 and 76 cm.
For B767-200, both are about 53 cm above bottom
On A330, thanks to the measurements of jacked plane, the data can be exact. The front door is 46 cm above belly, rear door 56 cm above belly.
On 777-200, the front door is about 62 cm above belly, rear door about 103 cm above belly.
On A380 (jacked), front door is 71 cm above front belly and rear door is 85 cm above rear belly.
Maindeck doorsills on 747 classics have minimum heights from 457 to 478 cm.
On DC-10, the nominal doorsill heights are 480 to 465 cm.
On empty A310-300, the heights are 455 to 480 cm.
On 767-200, the minimum sill heights are 406 to 409 cm.
On empty A330-300, the heights are 455 to 577 cm.
On 777-200, the minimum heights are 471 to 528 cm.
On laden A380, the heights are 512 to 514 cm.
The distance from the sill of front cargo door of DC-10 to the sill of main deck door above is 201 cm. From rear cargo door to main deck door above, 198 cm.
See the implications here. About 200 cm floor to floor. The headroom in underbelly is less than this by the thickness of the main deck. 167 cm on DC-10. Not enough for a stand-up cabin.
On A310, the front maindeck door is 193 cm above belly door, and rear maindeck door is 210 cm above belly door. So, similar range. Headroom is for 163 cm pallets and containers - not standing humans.
On B767, the front maindeck door is 183 cm above belly door, and rear maindeck door is 180 cm above.
On A330 (jacked), the front maindeck doors are 218 cm above belly door, and rear maindeck doors are 219 to 229 cm above belly door. The front underbelly is 171 cm high, rear underbelly 167 cm.
On 777-200, the front maindeck doors are 190 to 207 cm above underbelly door, and the rear doors are 192 to 206 cm above.
On a jacked A380, maindeck doors are 203 cm above belly doors.
The upper deck door on 747-300 has minimum height of 757 cm.
On a laden A388, the upper deck doors are 788 to 789 cm high.
On 747-300, the upper deck door is about 292 cm above the main deck door below.
On a jacked A380, upper deck doors are 275 cm above main deck doors.
Last edited by chornedsnorkack; 21st Mar 2007 at 16:27.
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The interest is to find out what the standards of widebody design are, and pick up where the differences are. Note that although the length of widebodies are wildly different (from 46 m of A310 to over 75 m of A340-600), wingspan differs hugely (from under 44 m of A310 to almost 80 m of A380) and engine arrangements also differ, the heights are similar.
Especially striking is how the underbellies of various widebodies have just about the height for 163 cm headroom, and not more.
Especially striking is how the underbellies of various widebodies have just about the height for 163 cm headroom, and not more.
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All aircraft designers try to make the a/c as light as possible. In the case of the undercarriage assembly that means make the legs as short as possible, among other considerations. All the heavies you mention are low-wing with wing-mounted engines, so the length of the u/c legs has to be just long enough to ensure the engines are off the ground at all times (including a bit of wing flex at touchdown) and the rear fuselage doesn't hit the ground at normal rotation on departure. Any longer than that, and it's just extra weight and longer legs to fold into the airframe after retraction. (Note the restriction on rotate rates on things like the A340-600 with the very long fueslage)
I guess the above considerations are so similar on all your widebodies that they all sit a similar height off the ground. But you'll need somebody from Dowty to post here to be sure!!!!!!!!!
I guess the above considerations are so similar on all your widebodies that they all sit a similar height off the ground. But you'll need somebody from Dowty to post here to be sure!!!!!!!!!
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All aircraft designers try to make the a/c as light as possible. In the case of the undercarriage assembly that means make the legs as short as possible, among other considerations. All the heavies you mention are low-wing with wing-mounted engines, so the length of the u/c legs has to be just long enough to ensure the engines are off the ground at all times (including a bit of wing flex at touchdown) and the rear fuselage doesn't hit the ground at normal rotation on departure.
747SP has exact same wingspan and wing as -100. The engine sizes should be same. The fuselage is shorter, so the rotation should be less limiting.
Why does 747SP stand taller?
As for roof heights...
On 747 classic, the minimum roof height is 970 cm.
On DC-10, the nominal roof height is 825 cm.
On empty A310, the roof height is 755 cm.
On 767-200, the minimum roof height is 719 cm.
On empty A330-300, the roofline slopes between 774 and 853 cm (and more...)
On B777-200, the roof is between 839 and 868 cm as mentioned.
On loaded A380, the roof height is 1080 to 1081 cm.
On 747 classic, the roof is about 213 cm above upper deck sill. Observe that this leaves quite limited headroom on upper deck.
On DC-10, the distance from maindeck doorsill to roof is 345 cm.
On A310, the distance is 301 cm.
On 767-200, the distance is 305 cm.
On A330-300, the front doors are 300 cm below roof, and rear door is 279 cm below.
On B777-200, the distance from doorsill to roof is about 368 cm.
On A380, the roof is 292 cm above upper deck sills.
