Īnd the next bigger models using the same wing (787-9 vs 350-10, (35J has a 4% larger wing but the reference area stays the same) has the same wingloading as well, so all this talk about differences in their wing design philosophies re wingloading is. the Airbus column (might be practical as Airbus publicizes these values, IIRC Boeing does not) we can see that the 788 and 359 as the two new main models have similar wingloadings!!!. Haven't measured the ACAP drawings of the 330 and 767 yet: Here the wingloadings (MTOW/Wingarea) I skipped Wimpress as I only have one value and it is more complicated to measure. Here the definition of the areas (from the Piano 5 guide):Īnd here how they pan out for some of the types we discuss all the time (I now measure them using Boeing Wimpress for the 767, Airbus for 346 and Trapezodial for 788. The wingareas we are throwing around do not have the same definition, the one for 788 (325m2) is Trapezoidal, the 443m2 for the A350 is Airbus and even PianoX mixes definitions e.g.
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This part of the Piano manual is more true then one thinks:
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Reading the Piano manual before was of great value and I have continuously been able to verify my results with the PianoX 788, 767 and 346 models that are provided for free (using the Output : Detailed flight profile and Point performance ), a big thanks to Dimitri Simos for making this really well designed tool available to us enthusiasts and for having the complete Piano 5 guide on the web.ĭimitri also helped me to solve the biggest problem I had, things just did not jive even though I had implemented everything that made sense from, the Aircraft design course written by R Shevell of Douglas fame. As only the 787-8 and not the 350 was available as PianoX model (excellent preliminary design tool with a free of charge demo copy here ) I started to implement a simple model my-selves. I then decided I ultimately wanted to understand the consequences of it all. They have many similarities and smaller differences but one difference that seemed large was the wingloading, Airbus going for a larger wing with more wetted area and Boeing preferring a smaller wing with lower weight and accepting a higher wingloading. In the A350 prototype thread no 1 post 236:Ī350 Prototypes Production Thread Part 1 (by ferpe in Civil Aviation)
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