Jump to content

Prop wash and wing lift


tinyclark
 Share

Recommended Posts

The prop slipstream has a large effect on wing lift, especially at low speeds. This is referred to as the "powered lift" portion of the total wing lift. The magnitude of powered lift is typically correlated to "thrust coefficient" (Ct). It all comes down the difference between the free-stream air velocity and the induced air velocity behind the props: the larger the difference (think high power and low speed), the larger the contribution of powered lift. In those conditions, the loss of an engine would cause a rolling tendency toward the dead engine.

To get an idea of the powered lift present on the C-130, compare the normal and max effort takeoff speeds. Normal speeds are based on "power off" stall while the max effort speeds use the "power on" stall speed.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

×
×
  • Create New...