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#2
01-10-2008, 04:00 PM
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| Re: What is phasing A brushless motor has phases (three) but I don't know what you mean about phasing.
__________________ We have nothing to fear but fear it's self! Oh and the ground and trees and LOOK OUT DOG! and buildings and spectators and Walkera 36- 430L,30amp esc, Futaba 6ch Walkera 36- basket case-Comet 500, Kalt Baron Whisper, Caliber 30 GMP/ HIROBO COBRA 50 FLYING!!  |
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#3
01-10-2008, 05:43 PM
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| Re: What is phasing Seen on RR, It is set by the washout guide pins, it controls tracking. If its off to much your heli will slide side-ways when you push the cyclic stick forward. I have know idea about this so im asking!! |
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#4
01-10-2008, 05:47 PM
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| Re: What is phasing Oh, I guess that is what they call the timing of the cyclic pitch inputs as the head rotoates.
__________________ We have nothing to fear but fear it's self! Oh and the ground and trees and LOOK OUT DOG! and buildings and spectators and Walkera 36- 430L,30amp esc, Futaba 6ch Walkera 36- basket case-Comet 500, Kalt Baron Whisper, Caliber 30 GMP/ HIROBO COBRA 50 FLYING!! |
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#5
01-11-2008, 07:54 AM
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| Re: What is phasing Phasing is about the cyclic input to the rotor head. Gyroscopic precession is at work here, this states that where we put an 'input' into a rotating mass the 'reaction' occurs 90 degrees later. Now: take a small wheel...give it a spin...(small cycle wheel is handy) and try to alter its postion...try tilting it...the reaction takes place where you dont expect it...90 degrees later. The same thing happens with helicopters, the typical system we use...Bell Hiller...is using the flybar...to stabilise but also to give a 'power steering' effect whatever input we do to the cyclic...the flybar is altered as it turns, this is then going to influence the rotor blades....turn the head by hand...and observe what happens. Phasing can only go out if the rotorhead is not quite right...some models are fool proof...others are not...so if something is not lined up right...usually on the main shaft/mast...then the heli will tend to drift in a particular direction...always the same direction...if the direction varies then there is something loose about the mechanics of the heli. Its important to make sure the flybar paddles are nuetral...or as near as possible...a slight angle can alter the phasing too...usually its an irratating wobble you get. Tracking is really about the blades and how they fly...by using red tape on one tip and yellow on the other...go and hover...and see if there are two tips at the ends of the disc...the colours will tell you which is the highest...if the red is high...land and adjust the pitch link for the blade....make sure to adjust so the red tipped blade rides lower. DO NOT ADJUST THE MIXING LEVERS...this will only upset the flybar arrangment...some helis might tolerate this...but its not good practice. Rob |
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#8
01-12-2008, 03:06 PM
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| Re: What is phasing Well no....I didnt know much when I first started out...it was only when I started my current job as a Helicopter mechanic that I really started to realise I knew so little...so I started reading up and pestering the qualified Guys as to how things work. What happens with real helis applies to our models too. Rob |
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What is phasing 
