---------------------------------------------------------- Europa-List Digest Archive --- Total Messages Posted Thu 02/20/14: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 02:35 PM - Re: FK fairings...............input requested. (Fred Klein) ________________________________ Message 1 _____________________________________ Time: 02:35:16 PM PST US From: Fred Klein Subject: Re: Europa-List: FK fairings...............input requested. Tony & Greg...I can't resist chiming in here...I'm delighted to see Tony's innovative approach to installing these wing root fairings so that they can be detachable in a way which would address the question as to whether or not any in-flight efficiencies are gained w/ their use...if I'd had more of my wits about me, I would have, and perhaps should have, done so on my ship...Fred On Feb 19, 2014, at 11:26 AM, Greg Fuchs wrote: > Hi Tony, > > I have been thinking about how to implement Fred's Wing Fairing sometime later. In interest of data-gathering (for me), it would need to be removable to allow for testing flight characteristics of the aircraft in multiple configurations, including the original fairing (also for backward compatibility for the other wings available). That would be a good way to see how it performs. Because of this, it seems that keeping it whole (no cutting) might be the best course of action. It's nice to know that someone else is considering the same. If you fly before me, you would have the best information available about how the un-chopped fairing will affect flight performance. :-) I am no aerodynamicist, but do agree with your interpretation below. Any effects of the fairing hanging in the breeze with the flaps deployed can be tested carefully at altitude. Otherwise, it has been tested by a number of others in the flaps-up position and is intended to be less draggy in that state. > > I don't think (and this is pure conjecture) the exposed surface area is large enough to do anything in the negative way, especially since its in competition with a very large flap that is doing most of the wind directing. > > BTW: I look forward to obtaining fairing attachment ideas (i.e. nutplates?) from you after you've had time to percolate the project. > > Regards, > Greg > > From: owner-europa-list-server@matronics.com [mailto:owner-europa-list-server@matronics.com] On Behalf Of Tony Renshaw > Sent: Saturday, February 15, 2014 1:31 AM > To: europa-list@matronics.com; davidjoyce@doctors.org.uk > Subject: Re: Europa-List: FK fairings...............input requested. > > Thanks David, > > We=92ll see how these FK fairings work out. I am not sure how the Spitfire flap articulates, but I suspect it will be the same as these fairings i.e. the flap retracts into the fairing such that it creates a small clamshell at the root end of the flap when it is extended. The drag I mention is with them deployed, and in combination with the lift created from the flap outboard of this shadowed part, would mean that the flap would have a lesser impact than a completely clean flap, but not by much. Any increase in drag is better at the root of the wing, so if lift is killed here, it shouldn=92t matter that much. Thats my view sofar, and I have made them removable so that if I am not happy with the collective wisdom to strap them on for the first flight, I won=92t. I can fly it clean to start with, which would be the wisest and then extend the flaps and check out the flight characteristics at altitude. Like I said, I don=92t expect anything untoward, but I don=92t actually know so am keen for the input. > Also, I have extended my wing closeouts so I don=92t have any gap more than 3 mm between the side of the fuse and the wings, without fairings. So, if I don=92t like the flight characteristics of these fairings I can remove them, on the airfield, and go fly without any fairings aft of the spar on the top of the wing. It looks good the way it is without fairings, and if it wasn=92t for the fact that there is interference drag in that area, what I have underneath the fairing is gross overkill for a good outcome. Don=92t ask me why I did it, to cover it up with a fairing, but hey, you get carried away from time to time, or I do. > Regards > Tony Renshaw > > > > > ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message europa-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Europa-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/europa-list Browse Digests http://www.matronics.com/digest/europa-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.