All_In;n1131156 said:
My posts may seem like arguing.
OK so now please correct this for me...
Here is what I learned today about landing flares:
After talking to Vance on the phone and then doing some math = it's the LIMITED TIME FRAME in both flares and zero G events.
His simple anwser was it the short time frame = just do the math.
Of course the physics is correct as is the opinion.
But the time frame is so small. A few seconds that their isn't that much time to spin up faster, but lighter blades do of course, or that much time to spin down either heaver last longer just as physic proves.
That's why there are no more accidents in either type of blades the time frame is too small unless the pilot flared way too high adding enough time to really hit hard and do any real damage.
This I would have learned with more experience and less theory.
As to why the helicopter engine is not the same as the wind. It is of course to drive the blades. But Gyro planes self regulate depending on the density altitude and the load it is carrying.
I understood this fact and applied it to a zero G event. Of course Low inertia blades spins up faster but for a very short time frame until they are up to speed again = if you cut power and enter a vertical decent.
Likewise if both low and high inertia blades enter a zero G event for a SMALL duration of time the high inertia blades will not have slowed down as much when they reach the top and the low inertia blades will only slow down a little in a short period of time.
But the main reason it's not like a helicopter is because helicopters have to stay in a very narrow RPM range and gyroplanes RPM are automatic and depends on the density altitude and the load it carrying.
So yes the wind is like an engine but RPM in gyros are automatic and uncoupled. In my example of zero G events the time frame is too small unless you stay in a zero G event too long increasing the time frame so either high to low inertia blades are adversely effected by the event in such a short period of time.
Your latest writing looks right to me John.
In my opinion a zero G event in a gyroplane is a very rare occurrence and I have found it difficult to get below .6 Gs.
I feel there are few black and white answers because everything is a compromise and the systems are interdependent and work in concert.
How I optimize a particular landing for a particular gyroplane is affected by many more things than high or low inertia blades.
Things that affect the procedure for an optimized landing in no particular order: high or low inertia blades, the horizontal stabilizer, the thrust line in relation to horizontal stabilizer, the ground in relation to the horizontal stabilizer, the effectiveness of the vertical stabilizer and rudder, a full flying rudder as opposed to a vertical stabilizer and rudder, the suspension, the aerodynamics of the aircraft shell, the characteristics of the rotor blade airfoil, the available power, the thrust line in relation to the center of gravity, the propeller, the goals of the landing, the rotor control linkage and how the aircraft is steered, the current loading and center of gravity.
Many things outside the aircraft affect the procedure for the optimized landing: the density altitude, wind, turbulence, proximity of obstacles to the wind, the landing surface, the proximity of the wind sock, what the wind sock is telling me, how well I am flying today, the needs of ATC or other traffic at a non-towered and where I want to turn out.
If I have a low time client I extend the downwind leg so they have a stabilized approach.
In my opinion the reason to practice is so you have tools to manage all these variables and still come up with a satisfactory landing.
I have well over 2,000 landings in my log book and I still learn from every one.
The best landing and takeoff procedure will be different for each gyroplane.
Every landing and takeoff is unique.
In my opinion a low G event is to be avoided and should not happen often enough to develop a procedure. A high inertia rotor will reduce rpm more slowly and recover from low rpm more slowly. I would not suggest that the blade inertia makes a difference in the outcome of a low g event.
I find the more I learn the less black and white the world seems and the harder it is to be definitive in the answer to a question. I often don’t understand the original question and struggle to find the source of the confusion.