A reforming stirrer!!!!!
- Oct 30, 2003
- Ballarat Australia
- None at the moment.
- Total Flight Time
- Since 1982 Gyro 5000+ mostly instructing, and approx. 200 fixed wing in the late 1960s.
Hi,Any comments on the roll axis being to one side??
I wonder what the explanation would be if they offered an engine that spun the prop in the opposite direction?Hi,
I took a photo of the rotor head during the recent Dannevirke fly-in (North Island, NZ) because it looked so weird, but I couldn't get it off my cellphone. I asked about it and was treated to a novel sounding explanation, which went something like this...
"Since the advancing blade experiences a greater airspeed than the retreating blade, there is assymetry of lift, which tends to roll the gyro to the left. By offsetting the axis, this tendency is overcome".
Which is why most gyros fly round in circles, I guess...
One would have assumed that the designers had heard of flapping, but perhaps I'm missing something?
Thanks, Sam. Now I see it. The offset doesn't rotate; it's static. Interesting. The theory put forth earlier now makes a little more sense to me. =Ed="Since the advancing blade experiences a greater airspeed than the retreating blade, there is asymmetry of lift, which tends to roll the gyro to the left. By offsetting the axis, this tendency is overcome".
Nice pick up Paul, interesting !!!!!!!!!!!!!!!!!!!!!Ernie offsets the roll pin through the U block by a small amount. I understand that it is to have the airframe hanging against the prop torque.
Sounds like it might be teeter bearing friction. Metal-on-metal teeter bearings normally try to lay the stick over to the left, forcing the pilot to hold right pressure.The offset works OK. Most MTs seem to have a tendency to want to roll to the left in flight, so need a bit of right-stick pressure in the cruise. It's not a big deal as the stick forces are quite light. It also needs some right stick on take-off.