KR> Hoerner Wing tips
I was looking at YouTube today and accidentally ran across this http://www.youtube.com/watch?v=RoOh-fgI8oU http://www.youtube.com/watch?v=ULhZchv7ito Might be of some interest to the list. Has anyone tried changing the wing tips? Regards Stan
KR> Hoerner Wing tips
Hi Stan This is pretty much how I did mine see www.peterskr2s.co.uk. Haven't flown it yet so I can't tell you whether it made any difference! Peter UK Might be of some interest to the list. Has anyone tried changing the wing tips? Regards Stan
KR> Hoerner Wing tips
On 2014-01-20 3:36 AM, Peter Drake wrote: From what I have heard the wing tip mod is supposed to give you more lift and lower your stall speed. I do not think you gain much in the way of speed. Regards Stan > Hi Stan > > This is pretty much how I did mine see www.peterskr2s.co.uk. Haven't > flown it yet so I can't tell you whether it made any difference! > > Peter UK > > Might be of some interest to the list. > Has anyone tried changing the wing tips? > Regards > Stan > > > > > ___ > Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. > To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org > please see other KRnet info at http://www.krnet.org/info.html > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to > change options > >
KR> Hoerner Wing tips
Keep in mind that you can't eliminate induced drag...you will always have wingtip vortices. I can't write the formula on my tablet. (cl squared / pi e AR). Most wingtip devices simply improve the efficiency by increasing the effective span or increasing the elliptical ratio since that's about all you can change with wingtips. I read an interesting masters thesis that was studying wingtip sails...he was trying to use wingtip vortices to create thrust instead of reducing induced drag...it looked like feathers on the wingtips of an soaring bird...extremely high drag at low speeds but interesting. On Jan 19, 2014 11:21 PM, "Global Solutions" wrote: > I was looking at YouTube today and accidentally ran across this > http://www.youtube.com/watch?v=RoOh-fgI8oU > http://www.youtube.com/watch?v=ULhZchv7ito > > Might be of some interest to the list. > Has anyone tried changing the wing tips? > Regards > Stan > > > > ___ > Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. > To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org > please see other KRnet info at http://www.krnet.org/info.html > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options >
KR> Hoerner Wing tips
Stan wrote: Has anyone tried changing the wing tips? I did extensive testing with N56ML, and then changed the tips to Hoerner. There was only a slight improvement in speed, but a real difference in climb and glide capability. See the bottom of http://www.n56ml.com/900hour/ for details. The Sonerai video was done by Jeff, who's on the list... Mark Langford, Harvest, AL ML at N56ML.com www.N56ML.com
KR> Hoerner Wing tips
Re: wing tips I re-created the swept style wing tips of the famous race plane Nemesis by Jon Sharpe on my KR2S although with a little less sweep for practical reasons. Not sure what speed improvements there might be but it sure looks cool! Probably the only KR2S with these tips . Mark Langford has some pictures of my plane on his site. If you look closely you will see the tips. Better pictures available on request. Chris Gardiner KR2S 238 hours Sent from my iPad > On Jan 20, 2014, at 6:24 AM, "Mark Langford" wrote: > > Stan wrote: > > Has anyone tried changing the wing tips? > > I did extensive testing with N56ML, and then changed the tips to Hoerner. > There was only a slight improvement in speed, but a real difference in > climb and glide capability. See the bottom of http://www.n56ml.com/900hour/ > for details. The Sonerai video was done by Jeff, who's on the list... > > Mark Langford, Harvest, AL > ML at N56ML.com > www.N56ML.com > > > > > ___ > Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. > To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org > please see other KRnet info at http://www.krnet.org/info.html > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options
KR> Hoerner Wing tips
Stan, I did that mod after flying the plane for 4 years with the standard tips. When I added the tips, I also cut 8? off of each wing. I don?t know if it made any speed difference (too many mods at the same time), but it certainly changed the way it lands. It is extremely heavy for a Sonerai I but still climbs at 1300fpm at gross and lands at around 55mph. There are a couple of videos on youtube of a few landings. An SX300 guy built a set of tips based on the video and reported that they lowered the stall speed. Here is a link to an article I wrote about the tips: https://www.dropbox.com/s/e8kgjgcwg3a7zdw/hoerner-wingtip-conversion-part-1.pdf I am currently working on another set of tips that hold fuel ; ) Jeff Lange Race 64 - Skye Racer Blog: http://schmleff.blogspot.com Youtube Channel: https://www.youtube.com/schmleff On Jan 19, 2014, at 11:21 PM, Global Solutions wrote: > I was looking at YouTube today and accidentally ran across this > http://www.youtube.com/watch?v=RoOh-fgI8oU > http://www.youtube.com/watch?v=ULhZchv7ito > > Might be of some interest to the list. > Has anyone tried changing the wing tips? > Regards > Stan > > > > ___ > Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. > To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org > please see other KRnet info at http://www.krnet.org/info.html > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options
KR> Hoerner Wing tips
Wingtips that hold fuel provide wing spar loading relief. You should be able to increase the max gross pound for pound...maybe even more if you burn out of the wingtips last. https://sites.google.com/site/mykr2stretch/ https://sites.google.com/site/mykr2stretch/parts-for-sale On Jan 21, 2014 9:01 AM, "Jeff Lange" wrote: > Stan, > > I did that mod after flying the plane for 4 years with the standard tips. > When I added the tips, I also cut 8? off of each wing. I don?t know if it > made any speed difference (too many mods at the same time), but it > certainly changed the way it lands. It is extremely heavy for a Sonerai I > but still climbs at 1300fpm at gross and lands at around 55mph. There are a > couple of videos on youtube of a few landings. > > An SX300 guy built a set of tips based on the video and reported that they > lowered the stall speed. > > Here is a link to an article I wrote about the tips: > https://www.dropbox.com/s/e8kgjgcwg3a7zdw/hoerner-wingtip-conversion-part-1.pdf > > I am currently working on another set of tips that hold fuel ; ) > > Jeff Lange > Race 64 - Skye Racer > Blog: http://schmleff.blogspot.com > Youtube Channel: https://www.youtube.com/schmleff > > On Jan 19, 2014, at 11:21 PM, Global Solutions wrote: > > > I was looking at YouTube today and accidentally ran across this > > http://www.youtube.com/watch?v=RoOh-fgI8oU > > http://www.youtube.com/watch?v=ULhZchv7ito > > > > Might be of some interest to the list. > > Has anyone tried changing the wing tips? > > Regards > > Stan > > > > > > > > ___ > > Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. > > To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org > > please see other KRnet info at http://www.krnet.org/info.html > > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to > change options > > ___ > Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. > To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org > please see other KRnet info at http://www.krnet.org/info.html > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options >
