quickmover From United States of America, joined Mar 2004, 2519 posts, RR: 0 Posted (4 years 11 months 1 week 5 days 10 hours ago) and read 7662 times:
Just curious. Are there any performance differences between Southwests 300s and 700s? I know they wanted the cockpit to similar. Are they the same engines? Isn't the wing on the 700 different from the 300?
SevenHeavy From United Kingdom, joined Mar 2004, 1169 posts, RR: 9
Reply 1, posted (4 years 11 months 1 week 5 days 10 hours ago) and read 7587 times:
Umm, yes! They are totally different aircraft. Southwest do have an analogue style cockpit layout but its built around a glass cockpit with screens rather than actual analogue gauges.
The aircraft are related but the -700 and -300 are a generation apart. The -700 has new engines, wing, landing gear, structural and aerodynamic components as well as myriad cabin and interior updates. Thats very general - I'm sure someone else will chime in with more detail.
The outcome? more range, payload, reliability, maintainence cost reductions and better passenger comfort.
They're the same to the flight crew...the same switches/knobs/displays in the same place to the same thing with the same procedures. The actual hardware and wiring can be radically different for some of the systems.
MD11Engineer From Germany, joined Oct 2003, 14616 posts, RR: 62
Reply 3, posted (4 years 11 months 1 week 4 days 17 hours ago) and read 7413 times:
Where do I get started?
Different engines, different landing gear, different wing, different flaps, different hydraulic systems, different electrical systems, different aircon systems, different cabin pressurisation system, different APU, different toilet system, different landing lights, different avionics, different avionic bay layout, different overwing exits, etc.
mandala499 From Indonesia, joined Aug 2001, 7347 posts, RR: 78
Reply 6, posted (4 years 11 months 1 week 4 days 7 hours ago) and read 7229 times:
The wing and engines = different performance, even at equal weights. It may be similar, but different. And they are trained to cover such differences.
Quoting SevenHeavy (Reply 1): The -700 has new engines, wing, landing gear, structural and aerodynamic components as well as myriad cabin and interior updates. Thats very general - I'm sure someone else will chime in with more detail.
One major one (benign on day to day, but bloody useful!) is that you can now start the APU in flight if GEN2 goes offline in the air when you have a flat battery (by some poor luck)... no such luck on the classics...
When losing situational awareness, pray Cumulus Granitus isn't nearby !
soon7x7 From , joined Dec 1969, posts, RR:
Reply 11, posted (4 years 11 months 1 week 1 hour ago) and read 6759 times:
Quoting Mender (Reply 9): Even the way the fuselage skins overlap each other is different. I suspect that is because the classics were prone to corrosion of the lap joints.
While the pressure vessel has the same cross section, as you have stated, the lap joint locations are different.
Quoting tdscanuck (Reply 5): it's a little more similar than I think you're implying.
The differences I can see is the new architecture of the wings, H/stab, V/stab, taller landing gears, different power plants, canoe fairings, fuselage lap joints, new glass cockpits, wing to fuselage fairings, emergency exit operations,and many other ancillary interior system changes...IMO, the NG has had quite an extensive redesign. Even while flying as a passenger, you can feel the difference. ...While still being a 737, not much was untouched 'cepting...like I said, the nose appears to be exactly the same only w/ vortex generators...I wouldn't be surprised if the nose bowl from a 727 would still fit on a NG 737.
mrskyguy From United States of America, joined exactly 7 years ago today! , 1214 posts, RR: 3
Reply 12, posted (4 years 11 months 6 days 9 hours ago) and read 6626 times:
One item that seems to be often overlooked in 733 vs. 7NG comparisons (which was touched upon in bullet-type fashion above) is the cabin pressurization system. The largest difference between the two from a cockpit perspective is the manual vs. automatic panel, but I've never really spent the time to learn more about what is different from a PAX comfort perspective.
What is different about the pressurization system on the -300 vs. the -7NGs that is more comfortable on the later model to passengers? As a very frequent passenger, I haven't noticed anything appreciably different between the two.
"The strength of the turbulence is directly proportional to the temperature of your coffee." -- Gunter's 2nd Law of Air