Scat tube
I have seen another builder connect the bottom cowl nozzle (air intake to the fab/carb) using a length of scat tube. He had modified the lower cowl to make the nozzle removable; it was secured to the rest of the cowl with 3 or 4 countersunk screws. When removed, the nozzle pulls out of the cowl with a length of scat tube attached. I assume the scat tube must slide over some sort of spigot on the fab box; I didn't see that part.
This seemed like a good solution because it isolates the cowl from the engine kick when it starts, via the flexible scat tube, whilst also making for a good path for fresh air to enter the fab box. But there's more fibre glass work and time, though, that's the down side.
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Paul vS (yes I'm also a Van)
Building RV-6A #22320 O-320 FP. Wings and tail complete, working on fuselage
Flying my low-n-slow Aeroprakt A-22 and the aero club's RV-9A while I build
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