Thanks, Mark. I am not doubting the data. I am going to try a few "virtual wind tunnel" CFD apps and I wanted the authoritative data to see how good the apps are.
Are you still getting 50+ mpg at 140 mph and 10k DA? On Wed, Apr 17, 2024 at 7:58 AM Mark Langford <m...@n56ml.com> wrote: > Steve Loebs wrote: > > > >>And that brings me to my question for Mark or anyone else that has > the answer. I found your page, Mark, > http://www.krnet.org/as504x/design.html and there is some great info > there. Do you or anyone else have the raw data from the wind tunnel > tests? Is that something that can be shared? << > > Steve, the only data I can share is on the website that you mentioned > above. We took up a KRnet collection to pay for the wind tunnel time, > and couldn't afford the luxury or the time frame required to use the > high speed wind tunnel. It was decided that was all we could reasonably > afford, and that the data gained from the low speed tunnel was > sufficient for our purposes....it had to be. I don't have the full > blown details of the wind tunnel data, and never have, so I can't help > you there. As mentioned on the website, the expert opinions were that > the tunnel simulation software was "close enough for KR work". It's > worth mentioning that there are a LOT of KRs now flying with the new > airfoils, and all indications that there is no issue at all with them. > > Despite all the effort I put into making my N56ML as fast and > aerodynamically efficient as possible, I quickly learned to throttle > back and save fuel when flying long distances. I still do that today, > casually doing around at 140 mph or so, rather than wide open throttle, > unless I got a late start and have to run faster. It turns out I enjoy > the extra time flying, like the low fuel cost, and spew less lead into > the atmosphere. I have to use a bit of 100LL mixed in with ethanol > free fuel due to the construction material of N891JF's fuel tank and > relatively high compression ratio of the engine. > > Thanks for the kind words on the KRnet email list and website. > > m...@n56ml.com > http://www.n56ml.com > Huntsville, AL > > > -- > KRnet mailing list > KRnet@list.krnet.org > https://list.krnet.org/mailman/listinfo/krnet >
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