Pilot135pd
Well Known Member
So I'm rebuilding my carb heat box flap (closes off filtered air and allows exhaust heated air to the carb) and apparently it hadn't been maintained or inspected since 1968.
As you can see in the pictures I need to fabricate a new shaft to hold that flap. I bought new bearings and now need to buy the metal rod. Everything I find online shows 4130 and locally they didn't even tell me the metal number, they just told me that it's hard enough and will do fine.
Since all this does is when it's cold before you land you pull the cable and the flap opens, then when you land you close it, why would that shaft material have to be so strong?
As you can see in the pictures I need to fabricate a new shaft to hold that flap. I bought new bearings and now need to buy the metal rod. Everything I find online shows 4130 and locally they didn't even tell me the metal number, they just told me that it's hard enough and will do fine.
Since all this does is when it's cold before you land you pull the cable and the flap opens, then when you land you close it, why would that shaft material have to be so strong?