KR> Re: RAF 48 airfoil
This can be done with Plotfoil (plot an airfoil out at a certain size in postscript). If the printers can't print postscript the program Ghostscript could be used to convert the postscript file to PDF or an image file. I think Plotfoil is more intended for model airplanes as it seems to work best with small one-page outputs. I could only get either the top or bottom section above/below the camber line to print at one time for airfoils larger than two pages which would require more cutting and pasting. Plotfoil is DOS or UNIX based and may require an emulator. I could create the PDF or image files for you if you?re unfamiliar with these programs. I assume both programs output accurate files but it might be best to manually check the drawings. Brock Does anybody have a digital version of the RAF 48 that I can take to Kinkos to have them printed up?ie the right size to cut templates. Lee Van Dyke
KR> Reflexing AS5045 Airfoil
Has anyone tried reflexing the flaps 5deg to reduce drag on the AS5045 airfoil? The airfoil does have a slight cusp so I thought it might help. Brock
KR> Re: [Informal!] poll on revival of McCulloch 4318 engines
I've started a email group at http://groups.yahoo.com/group/DIY_2S/ about DIY Two-Stroke Engines. The engine I plan to build is similar to the McCulloch 4318 so I'm definitely interested. Brock
KR> Why No Retractable Landing Gear on KRs Anymore?
The plans for the KR-2 I have seen have a retract system. I have got the impression that they have fallen out of favour. Is it just too much hassle or are the castings not available anymore? I know airplanes with wheel fairings can have good cruise speed but it seem like it would just be that much better with retracts. Digging through old posts I have read that because of the short wheel legs the plan can't get as close to a stall since the tail wheel contracts the ground first, this result in higher landing speeds, but this doesn't seem like an overwhelming problem. Brock
