Boeing P-8i Poseidon next to commercial Boeing 737-900ER

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KiwiCassie@reddit

Surprising the P-8 doesn’t have the engine chevrons

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Dangerous-Salad-bowl@reddit

Can someone explain the differing approaches to wing-tip solutions?

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Silly_Outside2633@reddit

The 737-900 has to reduce its wingspan. The p-8 does not have to worry about fitting into gates etc

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This is true in so far as the P8 doesn’t fit into an ICAO class C gate like a 737 does so that wasn’t a design constraint. The reason they needed to change the wing design at all was to support advanced anti-ice systems. The P8 needs to loiter in icing conditions while the 737 will typically just be climbing through them.

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caverunner17@reddit

I assume a potential future folding wingtip design (like the 777X) could be a possibility for whatever the MAX replacement is. I wonder what the fuel burn difference would be with the larger wingspan.

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Silly_Outside2633@reddit

Yeah I agree. The folding wingtip design may be incorporated more into new Boeing models as a standard

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bobith5@reddit

I wouldn't say that's likely just because of the 777x.

The 777X folding wingtip is just a derivative of the folding wing Boeing offered on the original 777-200.

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HokieAero@reddit

Yes, but a very different design than was proposed for the "B777-100" which was designed for operations at La Guardia.

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blackteashirt@reddit

More complex parts are more likely to break

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Waddoo123@reddit

P-8s are based on the NG design rather than MAX. That said, the wingtips are still raked.

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wrongwayup@reddit

Perhaps. Though the benefits of aerodynamics versus weight, and the reliability issues related to the higher cycles of short haul, might mean the designs diverge a little.

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Dangerous-Salad-bowl@reddit

Thank you! Makes total sense.

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ZippyDan@reddit

u make total sense

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Silly_Outside2633@reddit

Your welcome!

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Silly_Outside2633@reddit

Also notice the p-8 has more swept back wings

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RealGentleman80@reddit

Same wing, the P-8 has raked wingtips vs winglets which makes it look more swept

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Sweetcheels69@reddit

Longer reinforced wing for high load and armaments.

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Kjartanski@reddit

Imagine launching a sidewinder off an airliner

Before anyone comes at me i know the hardpoints are for Harpoons

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newworkoutgloves@reddit

I’m sure some engineer had designed a hard point conversion and software just for shits and giggles. Anything to keep the 22 from getting an intercept

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h00ha@reddit

777 has the same.

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HokieAero@reddit

Airlines like to put their logos on winglets.

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Katana_DV20@reddit

You'll find this interesting:

https://mentourpilot.com/why-does-the-p-8a-poseidon-have-these-wingtips/

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Dangerous-Salad-bowl@reddit

Perfect. Thanks.

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kernpanic@reddit

Different roles. The 737 spends most of its time climbing or above 32,009 feet.

The p8? 500 feet.

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Thunderbudz@reddit

I dont think the p8 actually spends that much time below 1000 ft. The majority is probably between 3k-15k

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TimeSpacePilot@reddit

32,009 is oddly specific for a number that means nothing in aviation 🤣

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Silly_Outside2633@reddit

🤣

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kitsapguy6199@reddit

I believe I remember in a brief that they are 800 wings, as the mass manufactured 900 wings couldn't hold the weight of ordanace. I can't remember why they went with raked vs blended winglets, but if memory serves it had something to do with fuel efficiency.

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flightist@reddit

Other way around. It’s an 800 fuselage and (slightly beefier) 900 wings, because it has virtually the same MTOW as the 900.

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kitsapguy6199@reddit

I fully trust you!! I was on my way out as we were bringing her on...most of my hours are in the old reliable (or unreliable...lol) P-3! I remember the first deployment and having to be backup in case the P-8 drives didn't load....ugh!!

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