Hi, aerodynamic gurus.
I’ve been trying to make a half-decent FS9 air file for the CFS2 Ki-45 by Akemi. I’ve got it flying ok. The excessive nose heavy CG is fixed, as well as most of the pitch instability. I think it’s about ready to be released on the unsuspecting public, except for one thing:
The reference speeds section says she stalls at 58 kts with full flaps, and indeed she stalls at just around that speed, but, in order to get the plane that slow requires an extreme nose high attitude. That means you can’t land the plane in the usual technique in which the ship is just on the edge of a stall as she touches down, because if you do that the ship will hit the ground tail wheel first, and you can’t see the runway anymore anyway. So you have to land hot.
My first thought was to tweak on the CG again, but I don’t think that’s the problem. Moving the CG forward will only result in more backwards force required on the yoke to keep the ship in the nose high attitude needed to fly that slow.
Having a hard time getting my head around this one...
Also, while doing stall tests at 5000 feet, I noticed that even when the power is pulled back to idle, the nose doesn’t fall, and in fact wants to come up, even while very close to stall speed. The ship is going down big time, as can be seen by checking the VSI and the altimeter, but the nose won’t drop. Even when she does stall, the nose takes a long time to fall off, and then quickly comes up again.
Bookmarks