lynbuell
Junior Member
Float tubes make your boots last longer.
Posts: 73
|
Post by lynbuell on May 5, 2006 8:36:36 GMT -5
Here's one to start a chat...if a helecopters blades are doing 100mph and the forward speed of the helecopter is 100mph that means the blade going forward is doing effectivly 200mph and the blade going backwards 0mph what stops the helecopter flipping over!!
|
|
|
|
Post by TroutBoy on May 5, 2006 8:50:01 GMT -5
why would the helicopter blade speed match the forward velocity - it's not linear
|
|
lynbuell
Junior Member
Float tubes make your boots last longer.
Posts: 73
|
Post by lynbuell on May 5, 2006 9:36:44 GMT -5
The applied torque to the rotor head would result in a fixed RPM accurate to with one or two RPM,this matched to the speed would equate to the forward speed of the blade in relation to the airspeed doubling and cancelling out in regard to the retreating blade(down wind if u like).
|
|
|
|
Post by AlanB on May 6, 2006 1:32:07 GMT -5
Fear! All aircraft work on the fear of the people on board. Thats what makes them fly. If the fear level gets too low then they fall out the sky.
Not my theory, blame Mr Gierach.
Cheers
Alan.
|
|
|
|
Post by jan on May 6, 2006 2:26:10 GMT -5
no chance of that happening on the logan air flights to shetland on a windy day
|
|
|
|
Post by IanH on May 6, 2006 3:23:22 GMT -5
Doesn't the helicopter tilt in the direction it's travelling?
|
|
|
|
Post by Windknot on May 7, 2006 3:55:33 GMT -5
That can happen- it's know as retreating blade stall. Helicopter designers have been trying to overcome RBS since day one. The answer seems to be contra-rotating blades.
The angle of attack of the retreating blade is increased to compensate for the reduction in lift.
|
|
