As some of you know, we've been supplying a sump hose package for the Barrett IO540 mainly for the RV10s. Because of the internal structure of the sump, there is an external hose that supplys the oil pump. Well, in the RV10, the space between the aft sump and the nose gear limits the adapter fittings, and does complicate things alittle.
In the past we've used a AN823-10D (45*) adapter at the aft sump with a 120* hose end. It was labor intensive for me to modify the 120* hose end for our hose. So we changed it to a AN822-10D (90*) and that solved the issue----for the time being. Works well.
However---gee there is always a 'however', doing maintenance on the sump screen became an issue. It wasnt the fact that the screen wasnt serviceable, it was that the sump ports were NPT thread. Removing the 90* adapter to get to the screen meant that there was a real probablity that getting the fitting in the same orientation AND tight/leak free, might be an issue. In addition to changing the threads ever so slightly each time the fitting was reinstalled. Several renditions of bushings and oring boss adapters didnt solve the problem of the NPT thread in the sump.
Through the efforts of Bob Lussow, we think we have a protential solution.
Its a fitting screen used in alot of dry sump race engine applications. Bob removed the original sump screen, and installed the fitting screen. (it can be install at the aft sump fitting, or the branch port fitting on the sump tee. Serves the same purpose.) 10 hours +- of flight time, no difference in oil pressure throughout the flight profile. Pics below.
The advantage is this is a 730 micron screen, and is easily accessable. Biggest advantage is that once the aft sump fitting is sealed, tight and oriented properly, you dont have to remove it. So that eliminates the biggest worry and headache of most owners.
No---we dont make the screen and with permission of Doug, I'd like to give credit to Dry Sump Solutions of Temecula, CA. Screen available from them.
WE'll have one at our OSH exhibit along with the new version sump tee and quick drain for your viewing pleasure. Again---thanks to Bob Lussow for his contribution!
Tom
In the past we've used a AN823-10D (45*) adapter at the aft sump with a 120* hose end. It was labor intensive for me to modify the 120* hose end for our hose. So we changed it to a AN822-10D (90*) and that solved the issue----for the time being. Works well.
However---gee there is always a 'however', doing maintenance on the sump screen became an issue. It wasnt the fact that the screen wasnt serviceable, it was that the sump ports were NPT thread. Removing the 90* adapter to get to the screen meant that there was a real probablity that getting the fitting in the same orientation AND tight/leak free, might be an issue. In addition to changing the threads ever so slightly each time the fitting was reinstalled. Several renditions of bushings and oring boss adapters didnt solve the problem of the NPT thread in the sump.
Through the efforts of Bob Lussow, we think we have a protential solution.
Its a fitting screen used in alot of dry sump race engine applications. Bob removed the original sump screen, and installed the fitting screen. (it can be install at the aft sump fitting, or the branch port fitting on the sump tee. Serves the same purpose.) 10 hours +- of flight time, no difference in oil pressure throughout the flight profile. Pics below.
The advantage is this is a 730 micron screen, and is easily accessable. Biggest advantage is that once the aft sump fitting is sealed, tight and oriented properly, you dont have to remove it. So that eliminates the biggest worry and headache of most owners.
No---we dont make the screen and with permission of Doug, I'd like to give credit to Dry Sump Solutions of Temecula, CA. Screen available from them.
WE'll have one at our OSH exhibit along with the new version sump tee and quick drain for your viewing pleasure. Again---thanks to Bob Lussow for his contribution!
Tom
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