|  | | X-plane nové modelovanie letového modelu, prosba o preklad 23. 2. 2009 / 11:27 | |
| | Zdravím, mám k vám prosbu, vedel by niekto zdatný v technickej angličtine preložiť tento text? Ďakujem.
We no longer try to track the downwash on a per-element basis on the wings,
but instead we now deflect the air down behind the wings in 3-D space.
This means that fuselages, bodies, air flow into pro-discs.. EVERYTHING, is affected by the downwash of any wings in front them.
As well, we continue to consider all PROPS in front of all wings, tracking prop-wash in 3-d space as well.
This means that all wings and props and bodies are in the propwash and downwash of all wings and props in front of them, in all cases.
You can even SEE this!
Get in a plane and go flying. Hit the / key twice to see the airflow vectors.. you will SEE the downwash (vectors going DOWN)
and propwash (vectors going AFT) in 3-D space... these vectors affect the bodies, other props, other wings... EVERYTHING!
The Math. The Math!
(Note that the downwash vectors will point STRAIGHT down... this is because you only see the CHANGE in airflow-vector
from the free-stream, so you only SEE the the DOWNWARDS part of the downwash).
We now have improved fuselage lift, drag, sideforce modeling... this even helps the HELICOPTERS HOVER MORE ACCURATELY.
How? Well, in a hover, the body of the helicopter is in propwash, putting out significant force even though the machine is
not moving! We are getting these dynamics right on the money now, tracking the airflow over the bodies in propwash even if that
propwash flow is totally different than the freestream flow, as shown above. |
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