Hi All,
This sounds like a "what I learned from that" moment.
Good practice for holes that need to be fluid tight is to drill
or bore the hole slightly undersize and then finish the cut with a
reamer. Reamers come sized in thousandths of an inch, so it's not
usually much of a problem to get exactly the correct size.
Moreover, a reamed hole is going to be truly cylindrical, something
you can't count on when honing or polishing a drilled hole.
A chucking reamer - suitable for use in a drill press - will
run about $20 from suppliers like Rutland and ENCO, sometimes
considerably less, depending on the size and what's "on sale" at
the moment.
Good Building,
Dale R.
Stephen Brooks wrote:
It appears that I won't be able to attend this years round up,
htough I was hoping that I would have time to get there.
I came to SC yesterday, intending to finally take my plane to
NC. I've only flown it once in that last 4 months, so I pulled the
cowling, checked things out, and started the engine.
After a couple of minutes run time, I shut it down, and checked
everything out. I found that I now have a fuel leak from one of the
injectors, at the fuel rail. Apparently I have an o ring that is not
leaking. I've ordered a new set of seals from Mazatrix, and I'm going
to go back to the airport today, and remove the fuel rail so that I can
take it back home with me.
When I drilled the fuel rail for the injectors, the holes are
not perfectly smooth. I think that the roughness of the bore probably
led to the o ring failure. I'm going to polish the bore, without
hopefully enlarging it any. I think that I'm going to use a dremel
with a fine stone on it.
This weekend I also have to help our yougest dughter and
son-in-law frame up a new house they are building.
I hope that everyone has a great time at the roundup, and I hope
to make it next year.
Steve Brooks
Cozy MKIV N75CZ
Turbo Rotary 13B