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Subject: Re: [FlyRotary] Re: OMP Plumbing
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From: Tracy <rwstracy@gmail.com>
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Date: Mon, 9 Apr 2012 14:28:44 -0400
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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I understand why that would motivate you to go OMP Mark!

Not that I know the bottom line truth to the auto fuel/ fiberglass nightmare=
s that have struck so many builders lately but the latest theory I heard is t=
hat it is not the Ethanol that is eating the tanks but the much advertised f=
uel injector / valve cleaner additives that many oil companies are putting i=
n the gasoline.   Who knows?

Tracy
Sent from my iPad

On Apr 9, 2012, at 12:38 PM, Mark Steitle <msteitle@gmail.com> wrote:

> Tracy,
>=20
> OK, here's the rest of the story...
>=20
> I have come to believe the Lancair wing fuel tank design may have been
> partly responsible for the damage to my apex seals.  Lancair uses a
> wet wing and there are ribs forming 4 separate fuel bays per wing.
> The ribs have "mouse holes" to allow fuel to pass from section to
> section.  Years ago, when I used to run mogas, I used a fuel trailer
> and would add 2-stroke when filling.  It would be well mixed by the
> time I pumped it into my a/c tanks.  I was forced to switch to 100LL
> when the beaurocrats started blending ethanol in all auto fuels
> (ethanol is non-compatible with the Jeffco adhesives).  I now have to
> fuel at the airport(s), so the process is to pour the 2-stroke into
> the wing as I pump the fuel.  This isn't easy to do and I seldom
> finish pouring the oil at the same time the tank is reaching full.
> Pouring oil while fueling surely helped, but in retrospect I suspect
> it still didn't mix thoroughly due to the ribs in the tanks.  I can't
> figure a way to get the fuel thoroughly mixed, so I decided to switch
> over to the OMP system.
>=20
> Maybe the answer is to do both.  I can run the OMP (with 3-lines) and
> also add some additional 2-stroke (1/2 oz./gallon) to the wing tanks.
> Not perfect, but much better than the alternative.
>=20
> Mark
>=20
>=20
> On 4/9/12, Tracy <rwstracy@gmail.com> wrote:
>> Hope I didn't give the impression I was an expert on the Mazda oil inject=
ion
>> system.   I only remember where the 4 lines went on the 13B from
>> disassembling so many of them.   Only 2 of the ports (secondaries I belie=
ve)
>> got the oil lines so only 4 needed.    Don't think I've ever seen a 20B O=
MP
>> setup  (my 20B engine was built from new parts).   I can't imagine why th=
ere
>> are 4 lines on a 20B setup.   I think there are only 2 lines used on 3rd g=
en
>> 13Bs.  Only the rotor housings are fed, not the manifold.   Since the 20B=
 is
>> essentially a 3rd gen engine,  I would have thought it would have a simil=
ar
>> setup with 3 lines (one to each rotor housing).
>>=20
>> I'm still of the opinion that you can't do better (from a functional
>> standpoint) than premixing the oil so I've never played with the injectio=
n.
>> It just isn't practical for most people in car use.   That's why 95%+ of O=
MP
>> adapters are purchased by car guys.
>>=20
>> Tracy
>>=20
>> PS:   I thought I sent that updated EC2 installation guide to you before I=

>> left home (I'm in Colorado until early May)   The main difference from la=
st
>> one you have is that Both A & B are programmed when running on A controll=
er.
>>  When using B, only B is affected by programming changes.
>>=20
>> Sent from my iPad
>>=20
>> On Apr 9, 2012, at 10:12 AM, Mark Steitle <msteitle@gmail.com> wrote:
>>=20
>>> Tracy,
>>>=20
>>> How should I plumb the 4 lines for the 3-rotor.  =46rom your
>>> explanation, it seems it should have 6 lines (2 per rotor)?  Even the
>>> 20b OMP only has 4-ports. Should I split the 4th line into three
>>> separate lines?  Do you know of anyplace where I could read about how
>>> OMPs are connected from the factory?
>>>=20
>>> Thanks,
>>> Mark
>>>=20
>>> P.S.  Were you going to email me a copy of the updated EC-2 manual?
>>>=20
>>>=20
>>> On 4/9/12, Tracy <rwstracy@gmail.com> wrote:
>>>> Two into the rotor housings, two into the intake manifold just upstream=

>>>> of
>>>> the ports in the block.
>>>>=20
>>>> Tracy
>>>>=20
>>>> Sent from my iPad
>>>>=20
>>>> On Apr 9, 2012, at 5:42 AM, Mark Steitle <msteitle@gmail.com> wrote:
>>>>=20
>>>>> Steve, that's why I'm asking the experts on this.  I'm still trying to=

>>>>> figure this out.  The older 13b OMP has 4 ports.  So did the 20B OMP,
>>>>> with
>>>>> only three lines.  I was planning on not using the 4th port.  Where do=
es
>>>>> the 4th line go to on the 13b setup?
>>>>>=20
>>>>> Mark
>>>>>=20
>>>>> On Sun, Apr 8, 2012 at 8:29 PM, Steven W. Boese <SBoese@uwyo.edu> wrot=
e:
>>>>> Mark,
>>>>>=20
>>>>>=20
>>>>>=20
>>>>> Since the OMP 's I've seen are set up with 4 oil lines and intended fo=
r
>>>>> a
>>>>> two rotor engine, how do you intend to adapt it to the three rotor
>>>>> engine
>>>>> in terms of amount of oil metered and how it is distributed?
>>>>>=20
>>>>>=20
>>>>>=20
>>>>> Steve
>>>>>=20
>>>>>=20
>>>>>=20
>>>>> From: Mark Steitle
>>>>>>=20
>>>>>>> Sent: Saturday, April 07, 2012 8:10 PM
>>>>>>> To: Rotary motors in aircraft
>>>>>>> Subject: [FlyRotary] OMP Plumbing
>>>>>>>=20
>>>>>>> Is anyone running an oil metering pump (OMP) that can help me figure=

>>>>>>> out
>>>>>>> how the lines should be connected.  I'm planning on using the Mazda
>>>>>>> banjo fittings to hook up to the OMP, but what do I do with the chec=
k
>>>>>>> valves.  Do you connect the check valves to a vacuum source or just
>>>>>>> block them off?  Will the system work properly if I plug the check
>>>>>>> valves?  I plan on locking the lever in the full open position.  Wil=
l
>>>>>>> this work for a/c use?  I'll be using Richard Sohn's adapter with a 1=

>>>>>>> gallon reservoir filled with 2-stroke oil.
>>>>>>>=20
>>>>>>> Mark S.
>>>>>>>=20
>>>>>>>=20
>>>>>>>=20
>>>>>>=20
>>>>>>=20
>>>>>=20
>>>>>=20
>>>>=20
>>>=20
>>> --
>>> Homepage:  http://www.flyrotary.com/
>>> Archive and UnSub:
>>> http://mail.lancaironline.net:81/lists/flyrotary/List.html
>>=20
>> --
>> Homepage:  http://www.flyrotary.com/
>> Archive and UnSub:
>> http://mail.lancaironline.net:81/lists/flyrotary/List.html
>>=20
>=20
> --
> Homepage:  http://www.flyrotary.com/
> Archive and UnSub:   http://mail.lancaironline.net:81/lists/flyrotary/List=
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