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adwb
12-04-2006, 05:32 PM
A couple of questions re head speed checking.
is it possible to check the head speed with out the main blades fitted by "clocking" the Paddles with the revcounter?

or

on a raptor 30 what if you checked the tail rotor rpm?
that should work would it not? by what would you multipy or divide the tail rotor speed to get the head speed?

thanks
Alistair

Radd
12-05-2006, 03:19 AM
not sure what you mean by fitting and clocking?...but I'm a newbie...lol

I have an optical tach...you look through a view finder and tune a button until the blades visually stop...a readout tells you the speed..

the tail blades move 4 times faster usually

mine is "kinda" like this one

http://www.deeteeenterprises.com/NS.WR.Chinook.Tach.php

http://www.deeteeenterprises.com/NS.WR.Chinook.Tach.php

leapfrog
12-05-2006, 06:06 AM
/me giggles...

watt_the?!
12-05-2006, 11:40 PM
blades on- at any pitch angle, will affect load therefore voltage to the motor, so for best results do it with them on.

otherwise do it without them on and apply a fudge factor to account for the low loading condition.

Radd
12-06-2006, 12:02 AM
yes...sorry...I didnt read it right as well as didnt understand it...I must have been asleep...

you will over rev the motor without blades on...and we generally check the headspeed at hover and under load..or... with an optical tach you can check it and how it loads even in 3D flying ..