"I think it is entirely possible to fly a wheeled helicopter just like a fixed-wing plane (rolling take-off and landing) if you never need to hover or auto-rotate." Isn't this how a gyrocopter works? RP On 31 March 2017 at 11:03, Sean Breheny wrote: > Helicopters have two distinct flying "modes" depending on how much forwar= d > speed you have. Above a certain speed threshold, they behave almost exact= ly > like a fixed-wing aircraft, except for some much larger gyroscopic effect= s. > Below the threshold (hover and transitioning to/from hover) the dynamics > change dramatically, inherent stability is lost, and it feels like trying > to keep a marble centered on an upside-down bowl. > > The above applies only to traditional helicopters which perform their > flight controls using a swashplate, articulated blades, etc. or the > Bell-Hiller system. It would be easy to make a fly-by-wire helicopter whi= ch > did not display the above discontinuity. > > I think that the general behavior was in part dictated by technology > limitations (no inherent stability in hover) and in part by intention > (making the mid-flight behavior as similar to a fixed-wing aircraft as > possible). > > I think it is entirely possible to fly a wheeled helicopter just like a > fixed-wing plane (rolling take-off and landing) if you never need to hove= r > or auto-rotate. > > Sean > > > On Thu, Mar 30, 2017 at 9:16 AM, peter green wrote= : > > > >>Do **NOT** attempt horizontal landings !!! > http://www.aviation.com/wp- > > content/uploads/2015/02/V-22.jpg > > >And once you have landed make sure there is a tractor to pull you to > > your parking spot ... > > > > AIUI helicopters frequently land much like aircraft either landing on > > their wheels if they have wheels and are landing on a runway or coming > into > > a ground effect hover just before they touch the ground. Coming in > > vertically is possible but risky and fuel hungry. Helicopters with whee= ls > > can taxi on the ground. > > > > From looking on youtube it looks like when taxing and taking off from = a > > runway the V22 operates with the proprotors almost but not quite vertic= al > > and when landing it operates with them vertical. > > > > https://www.youtube.com/watch?v=3D3zfbgadNdmM > > > > https://www.youtube.com/watch?v=3DYEYOTv0v058 > > -- > > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > > View/change your membership options at > > http://mailman.mit.edu/mailman/listinfo/piclist > > > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .