Scruffmeister Posted December 10, 2013 Share Posted December 10, 2013 Would appreciate any data you have on running for AXI 2826/10 using 4 or 5-cell LiPos. What props are you using with success, what current/wattage are you getting? For 4s I've been considering the Aeronaut CAMcarbon 12x7, 12x6 or 11x7 but I don't want to buy all of these as they're fairly expensive! For 5s I'm not sure where to start... Thanks in advance. Quote Link to comment Share on other sites More sharing options...
Swissflyer Posted December 10, 2013 Share Posted December 10, 2013 The AXI 2826/10 is in the DriveCalc database as are the props you mention. Why not download it (it's free and safe) & play with some values? KR Mark **LINK** Quote Link to comment Share on other sites More sharing options...
Chris Bott - Moderator Posted December 10, 2013 Share Posted December 10, 2013 Is that a 920kv motor Scruffmeister? If so, with 5S it will be trying to achieve a pretty high rpm. I think you'll be having to use quite small props to keep the current in spec. Quote Link to comment Share on other sites More sharing options...
Frank Skilbeck Posted December 10, 2013 Share Posted December 10, 2013 Just as well you didn't buy those props, some quick drive calc runs 4s APC 10 x 7e, 35A, 10,450rpm 1879g static thrust Aerocam 11 x 7 42mm 39A, 10,100 rpm, 2201g static thrust 5s APC 9 x 6e, 35A, 13,300 rpm, 2152g static thrust The motor is rated at 42A on a 4s a 11 x 7 is about on the limit and a 11 x 7 APC e would have it just above the 42A rating of the motor. Quote Link to comment Share on other sites More sharing options...
Scruffmeister Posted December 10, 2013 Author Share Posted December 10, 2013 Thanks all for the info so far - I wasn't aware of Drive Calc, that's a good free resource and it works on a Mac (which is what I use)! Quote Link to comment Share on other sites More sharing options...
Swissflyer Posted December 11, 2013 Share Posted December 11, 2013 Good news about the Mac. DriveCalc contains a very well developed electric motor model (the author added a correction to the classic three constant model that most calculators use). The prop constants are good too. That means that if you measure carefully, the predictions and reality usually match up to within about 3%. If they don’t it is worth checking to find out what is wrong, it is rarely the calculator. Most often I have found wrong motor constants to be the culprit. Once re-tested with DriveCalc things come back on track. KR Mark Quote Link to comment Share on other sites More sharing options...
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