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Engine Air Filter Inlet / Cowl Opening / Air Box

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dylanxpeters

Registered Users
Joined
Oct 5, 2016
Messages
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Location
New Hampshire
Gentlemen,

I'm in need of some up close photos of the engine air inlet on both the outside and inside of the cowling of an S-1. I'm setting up a Rotec TBI on my o-320 vertical/updraft induction.

My project came with a cowling that had a square hole in about the area of the airbox (after i made some spacers to get it there), but its set back a few inches from the cowl skin.

My luscombe is like many early low power airplanes where the cowling is tight to the airbox and no ducting or anything like that is required. With the airbox being set a few inches back from the cowling, i'm looking for recommendations.

1) Should i fabricate a cover over the hole like the red picture below? In this case, should i run some sort of ducting to the air box or just leave it in the bottom cowl not attached to the cowling?
2)Should i design or change my airbox to put it snug to the cowling like the Lucombe picture below?

The yellow aircraft below is mine for a little reference.

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