Dobra, nie w mm. Silnik 540 ma obudowe o dlugosci 5.4cm mierzona od lozyska do lozyska.

o ile pamiętam to jest chyba moc lub ile rozwine obrotów na s ale dokładnie nie wiem ale raczej to pierwsze

Moj Panie... skad takie informacje???

Nie jestem specem od elektrykow ale wszedlem na pare stronech www i tam wyczytalem, ze to jest opis silnika w stosunku do jego mocy.

That's the first numbering scheme, used by the electric car guys and with some minor changes by most of the electric flight people. It is very simply based on the physical size of the motors. The most basic sizes are 360/380 and 540/550. These motors are 36 or 38 or 54 or 55 millimeters long. Easy ? I believe the German company Graupner coined the Speed xxx naming convention and in the process rounded things up a bit. But basically if you measure the length of a standard ferrite electric motor in mm and add a 0 you have its approximate Speed xxx designation (in fact most Speed 400s are actually Mabuchi 380s but that's near enough). These are now widely used as generic names so a Speed 400 motor tends to mean any of that size, not necessarily one from Graupner.

Tak jak napisalem silnik przykladowo o oznaczeniu 540 rozni sie od jakiejs tam 300 moca. Mowie tu o silnikach, ktore maja identyczna liczbe zwoi a tylko sa mniejsze wiec i moc mniejsza...