". . . giving the spiral propwash effect more credit than it deserves . . ."
There's been extensive research as per Tom Hunt and Northrop Grumman in
recent years that the dominant force in a propeller's affect on the
airframe is the "P" factor. The tendency to turn at an increasedgf or
increasing angle of attack is a result of the relative difference in pitch
between the propeller's two blades at increasing airframe angles of attack.
There's also evidence (which I'm not inclined to substantiate - to lazy to
do the req'd research) that the affect of propwash is gone within a
distance less than the propeller's diameter behind the prop. In other words
it dissipates before it reaches a flying or control surface. If I remember
correctly, even the many, many bladed props one sees on such as a C130 have
little effect just a short distance behind the prop's disc.
On Sat, Mar 29, 2014 at 8:18 PM, Thayer Syme <thayer_at_gryffinaero.com> wrote:
>
>
> Yes to which question?
>
> >Yes.
> >
> >
> >On Fri, Mar 28, 2014 at 9:59 AM,
> ><<mailto:upwind120_at_gmail.com>upwind120_at_gmail.com> wrote:
> >
> >
> >Wouldn't a sub-rudder make a model turn right? Or am I giving the
> >spiral propwash effect more credit than it deserves?
> >a.
>
>
Received on Sat Mar 29 2014 - 18:01:13 CET
This archive was generated by Yannick on Sat Dec 14 2019 - 19:13:48 CET