Posted for "glong2" <glong2@netzero.net>:

 Bob:
 It indeed does interfere with the AHRS. I used 3 inch aluminum duct that I
 picked up at Home Depot, it was available, inexpensive, and did not affect
 the AHRS.
 
 Eugene Long
 Lancair Super ES
 glong2@netzero.net
 
"""
 The air duct hose supplied by Lancair that runs from the rear NACA forward
 has wire in it and is therefore magnetic.  My Chelton AHRS is located on top
 of the FS171 bulkhead and Kirk says that that hose will interfere with the
 operation of the AHRS.
 
 Does anyone know where I can get some 3" ducting hose that is non-magnetic?
 
 Bob Comyn
"""