View Full Version : RNP AR Airspeed or Groundspeed limit
The plates quote minimum and maximum speed for this type of approach (I believe the max speeds are normally to prevent excursions beyond the lateral limit). If so does this relate to groundspeed rather than IAS. Can’t find this anywhere? Thanks in advance.
aterpster
5th Oct 2018, 12:40
The plates quote minimum and maximum speed for this type of approach (I believe the max speeds are normally to prevent excursions beyond the lateral limit). If so does this relate to groundspeed rather than IAS. Can’t find this anywhere? Thanks in advance.
KIAS. True airspeed and historical omni-directional winds are part of the design criteria.
Thanks....so are you saying if I fly IAS there are built in margins. Any idea where this is written as I have had this discussion with a few people now and you are not the first to say this.....but no one could offer a reference.
aterpster
5th Oct 2018, 13:52
Thanks....so are you saying if I fly IAS there are built in margins. Any idea where this is written as I have had this discussion with a few people now and you are not the first to say this.....but no one could offer a reference.
For the US, FAA Order 8260.58A, Page 1-13 (for IAS to TAS) and Appendix A for historical winds. The order is on the FAA's website.