From: "David Leonard" <flyrotary@lancaironline.net>
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Date: Thu, 14 Jan 2016 09:11:08 -0800
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Subject: Oil Scavenge Pump vs Custom Oil Pan
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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Hi All,

I have decided to install an oil scavenge system to return the oil from
Tracy's gear box and perhaps from my turbo as well.  I am really getting
tired of all the oil getting all over everything.  It clearly seems to be
coming from the area between the RD1B and engine, which means that it is
probably coming past the RD1B oil seal.  Tracy calls for a nice big line
and downhill only run of the oil to a point that is higher than the oil
level in the sump.  However, there is precious little elevation drop and I
have not been able to achieve those requirements with a gravity only
system.  If I run the oil level very low in the sump the problem is
improved, but I think it is time for a better solution.

I am considering either a custom oil pan that allows for a deeper drop of
the oil, or a scavenge pump.

The benefit of the custom oil pan is that it can be an improvement in
weight over the stock pan, and requires no moving parts or power and is
unlikely to fail.  The scavenge pump is nice because it would be an easier
installation and will probably be more effective at fixing my solution,
though I do worry about adding another possible failure point.

1) Soliciting pinions on the decision between Scavenge pump and custom oil
pan.

2) Recommendations on someone who makes custom oil pans and pickups?

3) If I choose a pump, does that solution require a tank or can the drain
lines be connected directly to the pump?  This would create a suction on
the outlets of the RD1B and or the Turbo, does anyone see a problem with
that?  Drain oil from the RD1B too fast?  Bad for turbo bearings?

4) Would I need 2 pumps for redundancy?  I am leaning that way, which means
I am leaning more toward custom oil pan.

5) Turbo drain back seem adequate, which means I could use the pump to
isolate the Gear Box oil, allowing for different oil there.  Thoughts on
this option?

Thanks for the input!

Dave Leonard
Turbo Rotary RV-6 N4VY

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<div dir=3D"ltr"><div class=3D"gmail_extra">Hi All,</div><div class=3D"gmai=
l_extra"><br></div><div class=3D"gmail_extra"><div>I have decided to instal=
l an oil scavenge system to return the oil from Tracy&#39;s gear box and pe=
rhaps from my turbo as well.=C2=A0 I am really getting tired of all the oil=
 getting all over everything.=C2=A0 It clearly seems to be coming from the =
area between the RD1B and engine, which means that it is probably coming pa=
st the RD1B oil seal.=C2=A0 Tracy calls for a nice big line and downhill on=
ly run of the oil to a point that is higher than the oil level in the sump.=
=C2=A0 However, there is precious little elevation drop and I have not been=
 able to achieve those requirements with a gravity only system.=C2=A0 If I =
run the oil level very low in the sump the problem is improved, but I think=
 it is time for a better solution.</div><div><br></div><div>I am considerin=
g either a custom oil pan that allows for a deeper drop of the oil, or a sc=
avenge pump.</div><div><br></div><div>The benefit of the custom oil pan is =
that it can be an improvement in weight over the stock pan, and requires no=
 moving parts or power and is unlikely to fail.=C2=A0 The scavenge pump is =
nice because it would be an easier installation and will probably be more e=
ffective at fixing my solution, though I do worry about adding another poss=
ible failure point.</div><div><br></div><div>1) Soliciting pinions on the d=
ecision between Scavenge pump and custom oil pan.</div><div><br></div><div>=
2) Recommendations on someone who makes custom oil pans and pickups?</div><=
div><br></div><div>3) If I choose a pump, does that solution require a tank=
 or can the drain lines be connected directly to the pump?=C2=A0 This would=
 create a suction on the outlets of the RD1B and or the Turbo, does anyone =
see a problem with that?=C2=A0 Drain oil from the RD1B too fast?=C2=A0 Bad =
for turbo bearings?=C2=A0</div><div><br></div><div>4) Would I need 2 pumps =
for redundancy?=C2=A0 I am leaning that way, which means I am leaning more =
toward custom oil pan.</div><div><br></div><div>5) Turbo drain back seem ad=
equate, which means I could use the pump to isolate the Gear Box oil, allow=
ing for different oil there.=C2=A0 Thoughts on this option?</div><div><br><=
/div><div>Thanks for the input!</div><div><br></div><div>Dave Leonard</div>=
<div>Turbo Rotary RV-6 N4VY</div></div></div>

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