custom-vince Posted December 6, 2016 Share Posted December 6, 2016 I would be interested in building a graph of actual wing speeds. With enough data we could get a mean average speed, a number anyone could work from to estimate their expected speed. To collect data we would need. All up weight. Wing make and size. Speed at slow trim, fast trim, speedbar. It would be great to see a real picture of what speeds people are getting. Quote Link to comment Share on other sites More sharing options...
aljken Posted December 6, 2016 Share Posted December 6, 2016 What's the best method? Use a GPS and go one way, check the speed, then go the other way, check the speed. Then take the mean of the 2? Or any better ideas? Quote Link to comment Share on other sites More sharing options...
Casper Posted December 6, 2016 Share Posted December 6, 2016 (edited) Best method is to use a TAS probe https://www.flymaster-avionics.com/products/tas Isn't the data from the manufactures enough? ~+-2 km/h. From my understanding it's hard to get it accurate since there are too many factors involved. According to PPGpS and my Garmin Virb Ultra, I fly everything between backwards and 105 km/h depending on wind. Edited December 6, 2016 by Casper Quote Link to comment Share on other sites More sharing options...
custom-vince Posted December 8, 2016 Author Share Posted December 8, 2016 yes GPS is fine. Ideally upwind, then down wind. Maybe we should simplify it. Whats the most interesting to know? max trims out speed. not bar. What I would call XC cruising speed. Quote Link to comment Share on other sites More sharing options...
GR002 Posted December 8, 2016 Share Posted December 8, 2016 Paramania GTX 24 clip in 130KG slow trim 28mph fast trim 33 mph bar 38 mph Nivuik Kougar 2 23m clip in 130kg slow trim 25 mph fast trim 28 mph bar 33 mph These speeds were using gps into and down wind averages done a few times but still wont be 100 per cent acurate Quote Link to comment Share on other sites More sharing options...
aljken Posted December 12, 2016 Share Posted December 12, 2016 You might find this article an interesting read: http://www.xcmag.com/2016/11/how-fast-does-it-go-testing-paraglider-speeds/ Basically wings aren't as fast as manufacturers generally think. Quote Link to comment Share on other sites More sharing options...
custom-vince Posted December 16, 2016 Author Share Posted December 16, 2016 Magnetic 23. Pilot 85kg plus all gear. Motor of 20kg. 42kmh slow trim, Fast Trim 53kmh, speedbar 72kmh (all speeds were taking gps up and down wind) Quote Link to comment Share on other sites More sharing options...
GR002 Posted December 17, 2016 Share Posted December 17, 2016 Hi Vince, the fast trim on your Magetic is about the same as fast trim on my Paramania GTX 24. My Question is do you think there is a difference in fuel burn between these wings at fast trim? Quote Link to comment Share on other sites More sharing options...
custom-vince Posted December 19, 2016 Author Share Posted December 19, 2016 For me Yes, the Magnetic burns less as it has no reflex the whole wing surface is still in efficient mode. It is also slower at fast trim than my GTX22. To me, reflex gives a heap of safety while sacrificing efficiency, im not a wing designer but to my mind floppy cloth must cause drag if its not being used. That said the full fast on my magnetic asks more from the engine than GTX did at full fast, GTX top speed for me was 68kmh from memory, which is why I never quoted it before. Quote Link to comment Share on other sites More sharing options...
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