?????? Strech ONE bay... 48 "?? ???? TOO much, Virg
On 10/14/19 1:39 AM, Samuel Spanovich via KRnet wrote:
I've decided it is time to start looking into building my very own KR2S, or at the very least, start the planning stage. I understand this process is going to take a hefty chunk of my life, however even at my relatively young age, I am certainly not getting any younger. I have read a fair amount of material on the KR2S (most notably Mark L's "Opinions" and many other builder blogs), and have also scoured hundreds of hours of material on the KRnet archive. Nonetheless, I am curious to hear from the builders on here how much planning went into your airplane before you actually started construction? Also, what were some of your biggest challenges (both building, and the tolls it took on your personal life), and finally, some lessons learned and things you would do differently if you could do it again? I own a plans built KR2S (N6399U) which I feel was exceptionally built, and will be using as a baseline/reference for my own project. Below is a summary of what I am envisioning. Please feel free to comment on this setup and offer your opinions as well. Tri-Gear (personal preference) Dual control sticks AS5048/45 airfoil (stronger spars, more wing tank volume) Cockpit Width - Stretched 40" (assuming no serious structural/aerodynamic ramifications) Speed Brake (belly board) NACA 63009 - elevator (less drag) NV/Aero Wheel Pants/Fairings West Virgina University Blue & Gold paint (*see question below*) Dual wing tanks and a small header tank (~16 gallons) Revmaster 2300, upgraded 2100D (~80HP), or Corvair 2700 Ed Sterba Propeller Steam gauges (personal preference......yes I know haha) Ipad mounted with WingX or Foreflight Engine Monitor (EGT/CHT) Handheld Radio (removable in order to use in a different aircraft if needed) Transponder/ADSB-Out Empty Weight: 650-700 lbs Gross Weight: 1150-1200 lbs (500 lb useful load) Estimated Cruise: 120-130 KTAS Would like ~700-800 FPM near gross Range with 45 min reserve: ~300 NM (all the more I would need before a break) I would like to achieve at least a 700 FPM climb at gross, and cruise around 120-130 KTAS. I believe it is possible with this setup, as N6399U climbs out around 400-500 FPM near gross (but it's only ~70 HP), and cruises at ~110 KTAS with a Sterba 54x54" propeller and the RAF48 airfoil. The "new" airfoil should add another ~5 KTAS and a slightly better climbout, and a higher pitched 54" x 58" propeller should add another ~5 KTAS in cruise as well. With newer wheel pants and some small aerodynamic "clean ups", 120-130 KTAS seems quite doable. I would love to paint it WVU Blue and Gold, but I do recall reading several posts about the foam/glass not enjoying darker paint on a very hot day, possibly warping/loosening the airframe/epoxies. Can anybody shed some light on this? To start off with, and have a little bit of fun as well, I have began modeling my (envisioned) cockpit panel in FreeCAD, and plan to build the entire plane on here before beginning construction. I may even take it a step further and try to analyze my design in a CAE software to try to get a grasp at it's performance. If you made it this far, thank you very much for reading this far. With that said, I humbly ask......what am I missing, and what shall I keep an eye out for? Thank you V/R Sammer _______________________________________________ Search the KRnet Archives at https://www.mail-archive.com/krnet@list.krnet.org/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org
_______________________________________________ Search the KRnet Archives at https://www.mail-archive.com/krnet@list.krnet.org/. Please see LIST RULES and KRnet info at http://www.krnet.org/info.html. see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change options. To UNsubscribe from KRnet, send a message to krnet-le...@list.krnet.org
