Lifessamsara

Well guys, I am gladly receiving quite an education through this thread, so thankyou. Marc, I can see that the current airfoil for the main wing may be suitable for a cruise speed of 250kts (as that was the original concept of this thread), and that you are indicating addressing the the design of the fuselarge to reduce drag may be the best way to produce an economical high speed cruise. Id be interested to know what your thoughts are about improved performance of the nose, canopy and width/height of the fuselarge are Marc. I for one do not need to widen a cockpit 2-4" just yet (that middle age spread has not kicked in just yet ) Im also interested in the discussion on the vortex generation drag performance associated with our winglet wings. Is there a way to also reduce drag here? Let's not forget what Mike Arnold achieved with with just 65hp.... 213mph. Some guys have been dropping 220hp in the back of their canards....... why cant a 300kt top speed and 250kt possible with a basically slippery design and all that power be achieved? Keep up the open and creative thinking guys, and the technical discussion of the realitive merits of each idea (and leverage off that thinking). I look forward to the future posts. Cheers, Bruce.

Well Marc, thanks for that, it certainly made interesting reading (along with some of the other concepts in the Patents in the same area). It would seem if a canard used a swing canard configuration along with a flap it would provide a suitable TO/landing performance, and provide a lesser drag profile for for higher speed cruise (less drag as Carolina pointed out). I wonder, does this seem to be indicating the 250kt OpenEz design brief? What kind of flap design could be used on an OpenEz plan? Im enjoying the open thinking in this thread so far, and hope it continues. Cheers, Bruce.

Could someone explain the design concept of the swing-wing canard on the Beech Starship? Apart from being speed related, what was the primary relationship with the aerodynamic function of the canard? A link to a suitable site that explains this would also be of benefit thanks.

Thanks for the update Richard, Any idea how much airtime it has seen and how it flys? He is selling the plans for $500 US (that's alot more expensive in AU $s). I can't imagine that people will be willing to fork out the readys for an unproven design with doubtful support. The design "looks" good, but does it fly well, to what speed and fuel rates, and is it SAFE? Id appreciate your or anyone elses thoughts, Cheers, Bruce.

Hi Jon, I was just wondering if you were aware of what the latest is with the Dart aircraft? It certainly looks more rounded than the LEz and I believe is using a different construction technique for the fuselarge. Cheers, Bruce.

I had no idea that people had constructed AND flown with dihedral canards? Has anyone experimented with swept canards to anyones knowledge, and if so, the results/comments? Cheers, Bruce.

Any idea how I could find out more about Ilan Kroo's C wing? Bruce.

That's very interesting! Do you know if he is considering the inclusion of flapperons/flaps to accommodate TO and Landing speeds? Do you know if he has any designs he wouldnt mind someone looking over??

Hey guys, check out this ELT, it may be what you are looking for: https://www.americanavionics.com/catalog/product_info.php?cPath=27_90&products_id=306&osCsid=e88f05707d3fef50f3910fce2c671fec It uses D cells too Cheers, Bruce.

Hi guys and girls, Im new around these here parts but I have been lurking reading a number of posts. The idea of a 250kt cruise speed is certainly a stretch target, but just the sort of things to get people thinking and their creative juices flowing. It would seem that most of us automatically start to think of the design innovations introduced with the Berkut a decade ago (carbon this, carbon that) and I suspect that is part of the solution.......... but I do think it's going to take more than a lot of thrust (engine and prop' design), a slippery aircraft design (these canards are already slick), and reducing all the parsitic drag you can think of. As Spodman correctly pointed out, the next big hurdle is most likely looking into the aerodynamic constraints (such as canard flutter). Like Spodman, Im not in a position to provide informed and precise aerodynamic consultancy services, but what about thinking in this direction.......... what is the fastest (non-military) canard about? One of the larger commercial derivitives perhaps? What canard designs have they incorporated, and what is the relationship with it's primary wing (how does that compare to the standard Berkut/Longes design)? I think threads like this may be just what get's some people interested in experimental aircraft............ experimenting. Now I know some of you are thinking this is a serious business, flying, and I totally agree (yes, aviation maintenance and engineering background here). This thread is about navel gazing, thinking of the 'if only' thoughts, and giving some direction to some dreaming going on out there. I don't think that what everyone is seeking is a very efficient cross country touring aircraft, some people do like the hotrod (why do you think they chose to build Berkuts). The Variez and Longez inspired many people and indeed their designs/modifications, just perhaps they have some more inspiration to provide. I look forward to your replies, flames, but most importantly your thoughts about the 250kt Open-ez Cheers, Bruce.