In doing the annual on my RV, our A&P has found kind of an unusual air
fitler installation. As you guys probably know, the bottom of the
accelerator pump extends about 1/2" below the surface of the carburator,
where the top of the air box is attached. The accerator pump bottom then
extends about 1/2" into the air box. Unfortunately, where it protrudes
into the air box just happens to line up exactly with where the edge of
the air filter mates up to the top of the air box. The solution that
the builder of my plane used was to simply cut out a knotch in the air
filter gasket edge about 1/2" and then re-form a new seal around the
accelerator pump w/ RTV silicone. We're looking for an improvement, to
eliminate the possibility of some RTV material becoming dislodged from
the makeshift gasket and being ingested into the carb. We've looked at
offsetting the air box so it's not centered on the carb inlet but then
we're worried about missalignment with the air inlet in the cowl!
ing.
We've also discussed using an automotive air filter that consists of a
wire basket and foam filter, thinking we could deform the wire basket
to mis the accerator pump hump and the foam would still conform to the
basket, essentially creating a filter that wasn't perfectly round. Have
any of you run into this problem and if so, what was your solution?
Thanks for the help. Rick Luck
fitler installation. As you guys probably know, the bottom of the
accelerator pump extends about 1/2" below the surface of the carburator,
where the top of the air box is attached. The accerator pump bottom then
extends about 1/2" into the air box. Unfortunately, where it protrudes
into the air box just happens to line up exactly with where the edge of
the air filter mates up to the top of the air box. The solution that
the builder of my plane used was to simply cut out a knotch in the air
filter gasket edge about 1/2" and then re-form a new seal around the
accelerator pump w/ RTV silicone. We're looking for an improvement, to
eliminate the possibility of some RTV material becoming dislodged from
the makeshift gasket and being ingested into the carb. We've looked at
offsetting the air box so it's not centered on the carb inlet but then
we're worried about missalignment with the air inlet in the cowl!
ing.
We've also discussed using an automotive air filter that consists of a
wire basket and foam filter, thinking we could deform the wire basket
to mis the accerator pump hump and the foam would still conform to the
basket, essentially creating a filter that wasn't perfectly round. Have
any of you run into this problem and if so, what was your solution?
Thanks for the help. Rick Luck