---------------------------------------------------------- Pulsar-List Digest Archive --- Total Messages Posted Wed 04/04/12: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 12:19 AM - Pulsar-Aviators: Effect of Flaps (Keith Palmer) ________________________________ Message 1 _____________________________________ Time: 12:19:57 AM PST US From: "Keith Palmer" Subject: Pulsar-List: 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" 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" 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 > > ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message pulsar-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Pulsar-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/pulsar-list Browse Digests http://www.matronics.com/digest/pulsar-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.