In case you cannot see where Kevin is going, if both the static and pitot line ports had pressure applied from the car slipstream, the instrument would not read, since it reads the pressure difference between pitot and static. The static must be free to read static only.
Colin & Bev Rainey KR2(td) N96TA Sanford, FL crain...@cfl.rr.com http://kr-builder.org/Colin/index.html