[rebel-builders] belly sumps
Posted: Sun Feb 19, 2012 11:04 am
1. What came with the kit with the CAV-110 drain screwed into the
adapter and the adapter screwed onto the 1/4"NPT male AN825 "T" fitting.
The adapter has a 1/8 NPT female on one end and 1/4 NPT female on the
other end. My parts were all heavy brass and I don't like to encourage
corrosion by changing metal types if I don't have to. And I didn't want
the drain to extend so far below the fuselage.
2. Or for less vertical space I believe I screwed the CAV-110 into a 1/8
to 1/4 bushing (AN912) and the bushing into a 1/4" AN917 "T" fitting.
Then AN816's etc to bring the 3/8 aluminum tubes into and out of the
'T". It was then easy to make a couple of "L" brackets with grommets
that slipped over the AN816's and held everything. I added a cover plate
in the fuselage floor for access although some guys even bury rubber
hose without access. (I think they don't plan to keep the aircraft very
long...)
3. for even less vertical space you could always make a "T" similar to
the AN917 out of a block of aluminum and then have mounting holes to
bolt it directly to the airframe. That avoids the AN912 bushing and
makes it easier to mount but probably not worth the effort. Only
requires NPT taps and a drill to make it though.
Ken
Jesse Jenks wrote:
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adapter and the adapter screwed onto the 1/4"NPT male AN825 "T" fitting.
The adapter has a 1/8 NPT female on one end and 1/4 NPT female on the
other end. My parts were all heavy brass and I don't like to encourage
corrosion by changing metal types if I don't have to. And I didn't want
the drain to extend so far below the fuselage.
2. Or for less vertical space I believe I screwed the CAV-110 into a 1/8
to 1/4 bushing (AN912) and the bushing into a 1/4" AN917 "T" fitting.
Then AN816's etc to bring the 3/8 aluminum tubes into and out of the
'T". It was then easy to make a couple of "L" brackets with grommets
that slipped over the AN816's and held everything. I added a cover plate
in the fuselage floor for access although some guys even bury rubber
hose without access. (I think they don't plan to keep the aircraft very
long...)
3. for even less vertical space you could always make a "T" similar to
the AN917 out of a block of aluminum and then have mounting holes to
bolt it directly to the airframe. That avoids the AN912 bushing and
makes it easier to mount but probably not worth the effort. Only
requires NPT taps and a drill to make it though.
Ken
Jesse Jenks wrote:
The recent talk of sumps gives me the prompting to ask something I've been
wondering for a while:
What is the accepted method of making the sump? I haven't seen a specific
fitting for this. Do you just use an AN fitting with 1/8 pipe thread on one
side and screw the quick drain in there? If so, how do you go about mounting
it inside the fuselage? It would be nice if there was some sort of flanged
fitting you could rivet in the belly
Thanks.
Jesse
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