Melnic
Key Veteran
Location: Columbia, MD,USA
My Posts This: Topic Forum | You may very well be at about 2900 but maybe not. At least I know your probably not at 2200 
I've spent a bunch of time lately on headspeed stuff. Online headspeed calculators (I like the Darkhorse Motor Calc) don't tell you what you are flying at, Mostly what you SHOULD fly at w/ the motor, gear ratios you are using to get optimum efficiency. It worked out well when I was messing w/ my EXI as well as deciding what pinion to get w/ my 3000kV motor for the HBK2.
Depending on the linearity of your ESC and how you set your pitch and throttle curve, headspeed can varry 400-500RPM (or more) than the calc.
I use an optical tach for an RC airplane stuck into the ground and tach it in idle up mode as it gets light on the skids. Sometimes I'll also strap it down to my Workmate300 bench and measure it there using a flashlight since the tach does not like 60hz lighting.
I'd like to revise my wind limits and say that like today 44F and 15MPH, I don't think I want to fly ANYTHING unless I'm surrounded by my flying buddies heckling me. I left my "Radio Mit" at home and my only issue was the cold fingers. Everyone was leaving as I was arriving around noon.
http://dhrc.rchomepage.com/calc.htm
I wonder if there is a sound spectrum analyzer that could calculate RPM from sound of a video or audio file? Anyone know? |
dude
Where did that come from?
