Quick 8
Member
Hey guys,
I have a question (and maybe an answer). Can someone confirm my interpretation? :
Assuming a gyro has more than enough power to reach a VERY high forward speed, what would happen to the rotor behavior?
I am GUESSING, from reading Gessow & Meyers and NACA 716 by Bailey, that one of two things would happen first. Either:
1. You would reach your speed limit when you experience too much retreating blade stall and the rotor flaps against its teeter stops.
-OR-
2. You would reach your speed limit when your forward speed added to your advancing tip speed starts to approach around .75 times the speed of sound and compressibility effects start to make rotor drag skyrocket.
Which one of these would happen first depends on rotor diameter and blade loading. Higher blade loading makes a faster turning rotor and you would reach limiting condition #2 first. A lower blade loading makes the rotor turn slower and you would reach limiting condition #1 first.
ASSUMING ALL OF THE ABOVE IS CORRECT, what would happen in the real world if you reached either one of these limiting factors? Whould you just reach a point where you could not go any faster? Or, is there somthing that would happen that would make you crash and burn?
Any opinions are welcome.
Thanks,
~JIM
I have a question (and maybe an answer). Can someone confirm my interpretation? :
Assuming a gyro has more than enough power to reach a VERY high forward speed, what would happen to the rotor behavior?
I am GUESSING, from reading Gessow & Meyers and NACA 716 by Bailey, that one of two things would happen first. Either:
1. You would reach your speed limit when you experience too much retreating blade stall and the rotor flaps against its teeter stops.
-OR-
2. You would reach your speed limit when your forward speed added to your advancing tip speed starts to approach around .75 times the speed of sound and compressibility effects start to make rotor drag skyrocket.
Which one of these would happen first depends on rotor diameter and blade loading. Higher blade loading makes a faster turning rotor and you would reach limiting condition #2 first. A lower blade loading makes the rotor turn slower and you would reach limiting condition #1 first.
ASSUMING ALL OF THE ABOVE IS CORRECT, what would happen in the real world if you reached either one of these limiting factors? Whould you just reach a point where you could not go any faster? Or, is there somthing that would happen that would make you crash and burn?
Any opinions are welcome.
Thanks,
~JIM