Jared_Solomon
Well Known Member
Hi All,
I've been doing a lot of aerobatics lately and recently installed a Half Raven and an Accusump 2qt system on my RV-14A. So far, I pretty disappointed with the Accusump's performance and I'm wondering if i'm expecting too much from it. I track all of my engine data and debrief my acro flights with CloudAhoy. Before the Accusump, when performing stall turns, my oil pressure would drop to about 37psi. I installed the Accusump thinking it would keep the oil pressure from dropping so low during my brief zero G section of the maneuver. Unfortunately after analyzing the data the oil pressure diminished at the same rate (down to 37psi) both with and without the Accusump. I've read other's mention in previous threads that it takes 5-7 seconds for their oil PSI to fall to 25psi with a 1.5qt Accumulator. At what PSI does the pressure drop start to slow down for most of you? I would guess that without the accumulator my engine would take about 5-7 seconds to fall to 25 PSI anyway...at least that's what I've been seeing during my zero G stall turns. What am I missing? I would like to get a better idea of the expected performance of the accumulator before I start to debug and assume there is something wrong with either it or the installation.
Some details:
I've been doing a lot of aerobatics lately and recently installed a Half Raven and an Accusump 2qt system on my RV-14A. So far, I pretty disappointed with the Accusump's performance and I'm wondering if i'm expecting too much from it. I track all of my engine data and debrief my acro flights with CloudAhoy. Before the Accusump, when performing stall turns, my oil pressure would drop to about 37psi. I installed the Accusump thinking it would keep the oil pressure from dropping so low during my brief zero G section of the maneuver. Unfortunately after analyzing the data the oil pressure diminished at the same rate (down to 37psi) both with and without the Accusump. I've read other's mention in previous threads that it takes 5-7 seconds for their oil PSI to fall to 25psi with a 1.5qt Accumulator. At what PSI does the pressure drop start to slow down for most of you? I would guess that without the accumulator my engine would take about 5-7 seconds to fall to 25 PSI anyway...at least that's what I've been seeing during my zero G stall turns. What am I missing? I would like to get a better idea of the expected performance of the accumulator before I start to debug and assume there is something wrong with either it or the installation.
Some details:
- Accusump is precharged to 10psi
- Accusump is connected via a T-fitting on the exit port of the oil cooler
- Accusump pressure gauge reads 85psi at idle
- The Accusump has no valve (i.e. EPC valve) connected
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