I've only had two twins....but I would not even think about building a kit twin
without at least 5 degrees "out-thrust" on each engine. Up thrust, or down
thrust is meaningless when considering survivability with an engine out.
Consider this.... a Twin Star, with 7 degrees out-thrust on each engine (which
looks funny) can take off and land with only one engine running. This is abnormal
but highly desirable with a twin engine plane.
Out-thrust does look funny on the ground, but there is a "saying" about twin
engine aircraft...."when one engine quits, the other engine will lead you to the
crash site".
I have a Duelist 40, and a Super Duelist....both kits. Regardless of down thrust,
they will both have "out-thrust" on both engines.
FBD.
