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1. 12:19 AM - Pulsar-Aviators: Effect of Flaps (Keith Palmer)
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| Subject: | Pulsar-Aviators: Effect of Flaps |
Tom,
As you know the controls gives you control but - also creates further
effects of controls. Flaps changes the camber of the wing sometimes called
'variable camber', when going positive it reduces the stall speed and
increases drag, when going negitive (flap)for high speed it reduces drag
(this is well used in gliding) . Increasing the camber with flaps also
changes the centre of lift (further effects of control) which gives you a
progressive nose down attitude.
The Pulsar has a clean wing shape boardering on a basic glider
performance - glide ratio 14:1 so the first three stages gives you
increased lift and stall without adding much noticeable drag at all, only
the fourth stage (full flap) is drag (breaking) noticeable. If you have to
much play in your Pulsar flap control mechanism, you could almost eliminate
the first two stages of flap and not get a full fourth breaking stage.
Some Reading:-
http://en.wikipedia.org/wiki/Flap_(aircraft)
http://en.wikipedia.org/wiki/Camber_(aerodynamics)
http://en.wikipedia.org/wiki/Variable_camber_wing
----- Original Message -----
From: "HUGH COULTER" <ccoulter@wavecable.com>
Sent: Tuesday, April 03, 2012 8:59 PM
Subject: Re: Pulsar-List: Effect of Flaps
>
> On Fri, 30 Mar 2012 00:40:01 -0500
> "Tom Gibbons" <TomisFlyingby@comcast.net> wrote:
>> Hey Gang,
>>
>> Just curious on you flyers...........what do the flaps do as far as
>> performance and or airspeed and even attitude on the Pulsar? With
>> another builders group and they were talking about the flaps and their
>> effect on their aircraft. A long time ago I wanted to build a WAR F4U
>> project and still have the plans but it is interesting to stay with their
>> talk on this neat little plane.
>>
>> Thanks for any input you may have!
>>
>> Tom
>
> On my Pulsar the flaps increase drag but do not add lift.
> I use no flaps for take off and use 2 notches for landing. Full flaps tend
> to push the nose down.
>
> Clarke
>
>
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