- Nov 12, 2016
I am thinking though that it will be closer to 3000#. I figured roughly 1020 f^2 wetted area, and that is a single engine pusher. There will be a lot of structure and systems in the booms and tail, and the forward fuselage will have a lot of structure as well, as it is cantilevered far forward of the wing. Not to mention all of the complexity and weight involved in making it twin engine.
I think I will probably stick with the single engine pusher idea, although it would be awesome to have twin engines.
Twin engines might be lighter. All things being equal, The wing, booms, etc can all be lighter if the engines are on them then if they aren't, because the load is cantilevered less. With all the heavy stuff being in the middle of the airplane, you need a stronger wing structure to support it, both in terms of lift, and landing gear loading.
If you are wanting a single pusher, you're going to probably need something like a GM LS2/3 based powerplant, which is realistically 500# and then eats up your entire cargo bay.
The cockpit is substanitally cantilevered compared to, say, a 172, but it still isn't cantilevered that far. at 80% scale the pilot seat is only about 4 feet ahead of the leading edge of the wing. That's less load than your standard single engine airframe would have up there.