Mark A number of years ago when Rich Shirley was at Oshkosh and was having overheating issues with the Jabiru 3300 in his KR-1, I went to a seminar given by a German aerodynamisist to see if I could learn anything useful. She stated that cowl cheeks low on the sides was best location. Short of that, the lower outboard corners would be the next best place. But somehow, I couldn't remember what she said about the ratio of inlet vs. outlet areas.
________________________________ Subject: Re: Cowling exit design Pete, Google "thorp aircraft cooling exit area ratio" and you'll get some pretty good hits on this. The ratios vary wildly, from 1:1 to 1:1.3 on the Van's Air Force site thread at the top. Mark Langford's KR2S<http://www.n56ml.com/> www.n56ml.com Mark Langford's Homebuilt Airplane and Online Builder's Manual. Updated January 2017 - Another update to the KR2 refurb project, N891JF. Just to let you know that I ... > > Thanks, I'll try to do the curved outlet as my stainless firewall does > come down..... > > > *Subject:* Re: Cowling exit design > > I thought it was 1.3 x inlet area for fast airplanes, according to > Thorp, I believe it was, but I'm not sure I trust my memory either. I > don't think you could go wrong with 1.5 though, and that's on the safe > side. Try to implement a curved guide at the bottom of the firewall > like Troy did, Mark Langford's KR2S<http://www.n56ml.com/> www.n56ml.com Mark Langford's Homebuilt Airplane and Online Builder's Manual. Updated January 2017 - Another update to the KR2 refurb project, N891JF. Just to let you know that I ... > > Mark Langford's KR2S <http://www.n56ml.com/> Mark Langford's KR2S<http://www.n56ml.com/> www.n56ml.com Mark Langford's Homebuilt Airplane and Online Builder's Manual. Updated January 2017 - Another update to the KR2 refurb project, N891JF. Just to let you know that I ... > www.n56ml.com<http://www.n56ml.com> Mark Langford's KR2S<http://www.n56ml.com/> www.n56ml.com Mark Langford's Homebuilt Airplane and Online Builder's Manual. Updated January 2017 - Another update to the KR2 refurb project, N891JF. Just to let you know that I ... > Mark Langford's Homebuilt Airplane and Online Builder's Manual. Updated > January 2017 - Another update to the KR2 refurb project, N891JF. Just to > let you know that I ... > > > > >> _______________________________________________ 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
