As a reference design, I mounted a Dynon heated AOA pitot on a SafeAir1 mast just aft of the stall warning vane. I installed a doubler between the ribs that is riveted to both the ribs and the bottom skin. The heater control box is mounted on the stall switch access panel, this limits the wiring run to the two main power conductors (14 AWG). I wanted to maintain the removable wing capability, so the wire routing and two pressure tubes go to the first spar lightening hole then aft of the spar to the wing root. All wiring and pressure tubes are routed through a 1" thin wall tube inserted in and attached to the rib lightening holes. This routing also required a wing panel access hole to be added near the spar lightening hole. The F-1273-L baggage corner skin was modified with an access panel and holes for the two pressure tube quick connector bulkhead fittings and a 4-pin MIL-Circ connector for the pitot heater power. Routing the two pressure tubes aft to the Dynon ADAHRS is simple. Power is routed down the tunnel from a panel mounted Pitot Heat switch. To remove the wing, you pull the wing out about an 1.5" and disconnect the pitot power and two pressure lines.
I asked Van's about drilling the spar for two AN bulkhead connectors to route the pressure line and they did not recommend it, hence routing via the lightening holes. All the mods were done after the wing was built. I have seem some other examples where the mods are done on an open wing, looks a lot easier.
Hope this helps.
John Salak
RV12 N896HS
