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Very simply, T-Motor rates their MN3110 470kv motor as 460g thrust @50% throttle using TM 15x5 props and 4s power. If I chose these motors, TM's specs tell me I should stay around 2kg AUW to be ~50% throttle @hover with that configuration. Yet eCalc estimates are completely disconnected from...

I couldn't find the book, so came here. Is it my imagination or are these frames very light in their basic form? I want a light, strong frame. I'm looking at building a hexa flat and need some guidance on how these Mikrocopters are assembled. The "kit" I found appeared to only include the...

Read ECalc's essay on coaxial efficiency and how it can improve. http://www.ecalc.ch/calcinclude/help/xcoptercalchelp.htm#hints I have 3 Y6's. Not one of them react the same when choosing props. Variables such as frame size, axial distance between props, motors etc. make prop choice a crap...

This will be my third co-axial, the first X8. The frame was bought second hand for a low price, assembled but unused and only missing one screw! Having a Spy 750 Y6, I wanted a light weight X8. It seems like a strong frame, somewhat more than the Tarot I had, but there really isn't any...

platform: Pixhawk, CSGShop Neo-M8N GPS (same error with 3DR LEA6H GPS) If anyone knows or has an idea what may be causing these INAVerr, I'm all ears. I've posted at DIYDrones, RCG and APM Copter support. The latest reply from Randy was: I should be more clear. The PM message's long-loops...