*Uh,oh! Tapio just coined a new word, Proplets. '-)*
On Sun, Jan 23, 2011 at 11:34 PM, Tapio Linkosalo <tapio.linkosalo_at_iki.fi>wrote:
>
>
> On 24.1.2011 4:07, Brett Sanborn wrote:
> > In efficiency... The company only said that the propeller acted like a
> > prop with a diameter 2 inches greater. This is what we expect to see by
> > adding such wing tips; an apparent increase in span
> > based on the height of the tip.
>
> Precisely. A few years ago I was considering (and actually experimented)
> with winglets on my F1B, and during that time discussed with a friend
> who is an aero-engineer. His comment was that the effect of a winglet at
> best gets close to the benefit of similar area added _horizontally_ to
> the tip of the wing, in practise the added span is always superior. So
> winglets make sense if there are limits to the span (or area) of the
> wing, but if there are not, then it is better to extend the wingspan.
> Therefore with indoor models where wingspan is limited, tip plates may
> be useful, but the props seldom are diameter-limited so proplets might
> not be any good. Maybe in full-sized planes, where ground clearance
> makes a limit for prop diameter.
>
> -Tapio-
>
>
>
Received on Mon Jan 24 2011 - 10:11:09 CET
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