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Old 17th June 2007 | 03:18
  #6 (permalink)  
BGRing
 
Joined: Dec 2006
Posts: 44
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From: Australia
So why DOES the plane pull left in a climb even though the descending blade is NOT at a higher angle of attack?
It was just this one part of the quote that has me.
He goes on to explain how a heli has the Higher speed on the advancing side (True) but the thing is a Heli dose also have a lower pitch on that side to bring it into balance.
Now if the heli blade he uses as an Example was Fixed in pitch angle, like a typical Prop (Just imagine for now), Then that advancing blade would have both the Added aircraft speed and The increased AoA on that side (Relative to airflow from transition and beyond), so the statement
even though the descending blade is NOT at a higher angle of attack
is incorrect.
Am I wrong or just getting confused with is example

PS Good call brett s That is Mr X.

David. thanks for you input, I do understand your HO and Value it. thanks again. (Auto gyros do have cyclic eh, thus able to affect blade pitch during the blade rotation)

I will say that. if one understands heli blade dynamics they will most certainly understand Prop Dynamics. that is to say. heli have a lot more to learn eh.
So, Mr X was correct and wise to turn to heli for his example.


David. check out this link for an example of why multy engine don't feel P Factor so much.http://en.wikipedia.org/wiki/P-factor

I will go so far as to say that excessive yaw will cause a double effect (Two engines) on p-factor and sudden yaw will give a Gyro kick. the effects of excessive Pitch and sudden pitch will have a lesser effect on P-Factor and Gyro kick (On same twin engine example).
Thanks again people
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