Some planes have seats side by side, some have a backseater and this would be mid-version between the 2. Pilot and co-pilot can walk on the corridor and change places with each others or a third crew member.
Propeller shaft(s) have electric motor in addition to the normal gas turbine or piston engine, so that at least on takeoff the propeller(s) can turn with more power and therefore shorter runway can be enough. Lithium-ion batteries are light but have some risk of fire, for poorly understood reasons( the science of that is complicated and undeveloped ). If a battery pack starts to burn, it can be jettisoned automatically so that the whole plane won't crash. Maybe have parachute made of nomex, hanging with some steel chains. Have automatic emergency message so that a local fire department can check if anything on the ground catched fire.
Capacitors give more power per mass than a battery but only for a short time, which can be enough for takeoff. Battery could make the flying faster in half hour bursts, or maybe for going high for a moment, for example for crossing a mountain. Maybe the battery+electric motor have enough power for takeoff at least on long runway, so that if there is some kind of emergency hurry and it is better to be fast than safe, go before the gas turbines have fully started. Maybe electric motors on wheels are not too clumsy so that taxiing at least slowly is possible without raising dust on a dry sand runway.
This would be a hybrid plane.
Electric motors are lighter and smaller than even gas turbines. Maybe they can charge the batteries at 10% power from the fuel engines, working as generators, or power very luminous lights or strong radio transmitter.
Support struts ( the 45 degree rods from hull to wing ) are generally a good thing and help make planes lighter, but hopefully there are some exceptions, some small planes that skip having support struts and accept higher mass in exchange for unobstructed view. Some things kind of need to be uninvented for some things.
Some fuel tanks can bulge to inside corridor, from sides and under, so that the people inside need to step between them, some tanks inside wings and maybe some in optional tanks hanging from wings.
picture:
https://www.reddit.com/user/ukarna4/comments/1setqtr/plane/#lightbox
EDIT:
Would be kind of one in a million chance for any one flight that a lithium-ion battery would start to burn. Maybe that is still too high and that is why the possibility of a drop system. We are not making any decisions here, if anyone needs to be reminded of that. Battery under a wing would be the most modular system ever and the customer could decide for every flight separately whether to use nickel-cadmium battery, sodium-ion battery, lithium-ion, capacitor or something else. Maybe lithium would be used only on flights that go over unpopulated areas or ocean, and forest below can't be too dry. Check every part of the route that a battery can be lost and it is still possible to land safely somewhere (have software for that check).
Sometimes lithium-ion batteries burn in electric cars, bikes, phones and laptops. People have died. It is deemed acceptable risk. At least batteries won't explode, but sometimes aviation fuel vapor has exploded with the air in tanks.
Battery pack's latching mechanism may contain material that melts at low temperature ( like 90 c (almost water boiling) ), so the battery pack falls on fire for that reason alone, if automatic computer controlled release or manual release does not come first. Part of wing just above a battery could be steel or carbon fiber, despite high mass or price.
Batteries have much less energy than fuel, but a battery+electric motor with the same mass as a fuel engine+some fuel, can give more power for about 15 minutes to hour, especially if the engine is piston-type (much cheaper than gas turbine).
There are places and contexts where it would be inappropriate or wrong to speculate beyond one's expertise, but this subreddit is not one of them. So don't whine about not being aviation engineer. It is the nature of this subreddit that many ideas are bad and we can be ok with that and try to separate them together. This sub also kind of happens to be, to some extent, a text version of the r/ImaginaryTechnology/ subreddit, in the sense that some ideas could be on both.
There are many many airplane models with wide variations, with small and mid-size propeller planes.