snne
ACCESS: Top Secret
- Joined
- 3 July 2022
- Messages
- 764
- Reaction score
- 2,211
Boeing Future Flight concepts (2022)
- Thread starter snne
- Start date
Interesting indeed. It´s probably a STOL aircraft (see the over dimensioned T-tail*). I see Boeing understood that there could be a path to surpass Q-400 specs to gobble their share of the market: Short Field, High climb rate, High Alt.
The "turboprops" are probably not such, running with avgas, as inlets are pretty much too narrow for any turbines. So, we probably have an ICE (Turbo Compound?) or something electrical like a Fuel cells (see aft windowless fuselage section for a large (hence low pressure and low weight) tank) or even something more exotic like an hybrid compound.
*Probably even slightly aft CG with dual lifting surface at cruise(?) as that wing seems way too forward in the render.
The "turboprops" are probably not such, running with avgas, as inlets are pretty much too narrow for any turbines. So, we probably have an ICE (Turbo Compound?) or something electrical like a Fuel cells (see aft windowless fuselage section for a large (hence low pressure and low weight) tank) or even something more exotic like an hybrid compound.
*Probably even slightly aft CG with dual lifting surface at cruise(?) as that wing seems way too forward in the render.
Last edited:
- Joined
- 1 April 2006
- Messages
- 10,874
- Reaction score
- 7,451
This is one of three Future Flight concepts first revealed by Boeing back in summer of 2022.
Attachments
Ah... then Fuel cells with Electrical motors 
Note how each nacelles have its own battery to lower propagation of a malfunction and, certainly, reduces the Amperage variations running around the fuselage (safer, lighter, cheaper). I would have put a bypass linking all nacelle´s batteries that all power differential requests are dealt at the nacelle level to have uniform charge and temperature among all nacelles (easier for the systems & pilots*).
Notice that they put the FC under the cabin with the Batteries pack in the back, in the non pressurized compartment. It means they deemed FC safer than batteries. Interesting.
FC under the cabin floor would also generate heat to lower ancillary consumption for cabin environment.
*Sadly two pilots in that cockpit when all points to 2 being over redundant in the next future, especially for short haul flights.
Note how each nacelles have its own battery to lower propagation of a malfunction and, certainly, reduces the Amperage variations running around the fuselage (safer, lighter, cheaper). I would have put a bypass linking all nacelle´s batteries that all power differential requests are dealt at the nacelle level to have uniform charge and temperature among all nacelles (easier for the systems & pilots*).
Notice that they put the FC under the cabin with the Batteries pack in the back, in the non pressurized compartment. It means they deemed FC safer than batteries. Interesting.
FC under the cabin floor would also generate heat to lower ancillary consumption for cabin environment.
*Sadly two pilots in that cockpit when all points to 2 being over redundant in the next future, especially for short haul flights.
Last edited:
As some demonstration aircrafts are showing, fuel cells need extremly large coolers, so the plane showen doesn't look like having a FC for main propulsion.
www.aerointernational.de
Was ist das bislang größte Elektro-Flugzeug? - AERO International
Die US-Amerikanische Zulassungsbehörde hat ein Elektro-Flugzeug auf Basis einer Dash 8-300 zugelassen. Einem Erstflug steht damit nichts mehr im Weg. Das bisher größte Flugzeug seiner Art ist die Dornier Do 228.
www.aerointernational.de
The large scooping aperture on the Dash picture are inlets to cool down the FC and provide o2. Then the running Temperature varies with the choice of fuel, Some run at high temp some are low. It also depends of the fuel quality. With H2, you can choose to run in the lower range.
For example, SOFC (solid Oxide Fuel cells) need 400deg with Methane (natural gas), but much lower with Avgas or H2.
The blue pack would only have to be provided with an onboard Ox generator, which generally doesn´t need that big an inlet. See the size of the tank that, given its aft placement is certainly a low cryogenic tank (low pressure).
You can see that there is what seems an heat exchanger behind the blue pack (water condensed in the FC generate heat for the FC but when run against the heat from the battery pack vaporize, cooling the battery before being vented away (?)) .
The tank farm in the back nearly clearly indicates H2 fuel (but img res is low).
For example, SOFC (solid Oxide Fuel cells) need 400deg with Methane (natural gas), but much lower with Avgas or H2.
The blue pack would only have to be provided with an onboard Ox generator, which generally doesn´t need that big an inlet. See the size of the tank that, given its aft placement is certainly a low cryogenic tank (low pressure).
You can see that there is what seems an heat exchanger behind the blue pack (water condensed in the FC generate heat for the FC but when run against the heat from the battery pack vaporize, cooling the battery before being vented away (?)) .
The tank farm in the back nearly clearly indicates H2 fuel (but img res is low).
Last edited:
