ORIGINAL: Jet_Plane
ORIGINAL: MajorTomski
Wow, guys this is amazing!
...............many folks, even with the highest credential repeat what they have been taught as “truth” without question. I found this most evident in one of the dozens of aerodynamic text books I mentioned earlier.................
... <u>So why is it that most if not all planes yaw left in a vertical climb unless right thrust is added?</u> (my latest aerobatic model needed 4.5Deg of right thrust to straighten the up-line)
Steve
4.5 degrees offset?
That is a BUNCH!
We do some right trim-but only when it is shown to be required on a particular model.
Down thrust -basically a design patch- required on quite a few designs
Everyone has their own fix for things they don't like .
Every "offset" comes with some penalty-
Personally -I start at 0-0-0 then dial in or adjust for whatever causes a problem.
Simply adding some arbitrary incidence or offset ,starts you out with no clear understanding of what offsets and angles are really required.
.shoving the CG around will often fix or screwup a design
overweight -will also screw the pooch
ditto for trying to fly a design in a speed envelope for which it is not suited.
Tho it is not often seen of larger models - the added drag plates used on latest indoor aerobatic stuff ,really does have value.
If our big models had to hold very tight speed parameters -you would likely see these additions on them.
As it is - most don't have the reserve power to allow em.