The vortex generated at the prop tip is insignificant. Any device added there
even if it would elimiminate it would interfere significantly with tip velicity
and reduce the time aloft especially towards the end of the run. Also don't
forget that the anti-vortex device has to be fairly large in order to work. In
my opinion it might be wiser to experiment with wing tip winglets. Ciao,
Phedon
________________________________
From: Brett Sanborn <bsanborn_at_purdue.edu>
To: "Indoor_Construction_at_yahoogroups.com" <Indoor_Construction_at_yahoogroups.com>
Sent: Sun, January 23, 2011 6:02:16 PM
Subject: Re: [Indoor_Construction] Winglets on props?
Eric,
I looked into this a bit before the world champs in an effort to gain an edge on
the competition. I asked a guy who was in a phd program for aerodynamics and he
thought that it could work but didn't have a real good reason as to why. After
that I did a quick lit review but found surprisingly little information. When I
was searching, however, I did see that a small airplane company made a prop that
had about a 2 inch tip on the end, at a right angle like you're talking about.
They didnt note an increase in efface
On Jan 23, 2011, at 8:47nc PM, "Eric" <ewmonda_at_hotmail.com> wrote:
>Has anyone experimented with adding a "winglet" to the tip of a prop? Seems like
>it should be analagous to tip plates on the ends of our wings, but I'm sure
>there is a reason I've never seen one.
>Thanks,
>Eric Monda
>
>
Received on Mon Jan 24 2011 - 14:38:46 CET
This archive was generated by Yannick on Sat Dec 14 2019 - 19:13:46 CET