Erfolg Posted December 3, 2023 Share Posted December 3, 2023 I very occasionally print out aerofoil sections. To do this I use Profili. Today I have printed out a couple of chords. In loading the program I was informed that I am an unregistered user of 1.2, in the past this was not an issue. The screen said I should register to use 2.30c. In registering what are the down sides and benefits. Who knows? Quote Link to comment Share on other sites More sharing options...
kc Posted December 3, 2023 Share Posted December 3, 2023 When I opened Profili today after not using it for several years it said it is 2.30b but unregistered - and if not registered 2.3 acts like 1.2 with minor improvements. So you could update and not register yet continue using. ( perhaps I updated to 2.3 when I last used it ) not sure what the registered version gives but it was not too dear a few years ago but I didn't bother. Still works. Lots of airfoils everything you could think of - worth looking at Trainer 60 which was the nearest i could find to the Ugly Stik airfoil. I think Trainer 60 was an RCM ( USA magazine ) Trainer by Joe Bridi. Quote Link to comment Share on other sites More sharing options...
kc Posted December 3, 2023 Share Posted December 3, 2023 The registered features compared to un-registered is here. Seems to cost 25 Euros to register for those who don't make money from selling plans. 90 euros for clubs etc. Quote Link to comment Share on other sites More sharing options...
Andy Stephenson Posted December 3, 2023 Share Posted December 3, 2023 This software looks interesting but what do they mean by "polars", is this as opposed to Cartesian coordinates? Quote Link to comment Share on other sites More sharing options...
Nigel R Posted December 4, 2023 Share Posted December 4, 2023 https://www.mh-aerotools.de/airfoils/hdipolar.htm Quote Link to comment Share on other sites More sharing options...
Andy Stephenson Posted December 4, 2023 Share Posted December 4, 2023 Nigel, Thanks for that explanation. Quote Link to comment Share on other sites More sharing options...
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