On Aug 6, 2012, at 11:08 AM, Mark Steitle <
msteitle@gmail.com> wrote:
> Tracy,
>
> See Bobby's comments regarding my MAP at idle. My engine idles at
> about 17.5 - 18" MAP, but the MAP will drop lower when slightly off
> idle. I attribute this to the greater overlap of the p-port design.
> Makes tuning a little more challenging though.
>
> A while back I had posted a question about "normal" MAP readings for
> p-port engines but never got a reply. I guess I'm in unchartered
> territory.
>
> Mark
>
> ---------- Forwarded message ----------
> From: "Bobby J. Hughes" <
bhughes@qnsi.net>
> Date: Mon, 6 Aug 2012 09:24:06 -0500
> Subject: FW: [FlyRotary] Re: PP engine advice?
> To: Mark Steitle <
msteitle@gmail.com>
>
> Might tell Tracy about your 18" MP at idle and slightly lower MP off
> idle. The other builders may be fighting the same issue. It would also
> be interesting to know if they are seeing MP this high in their
> installation.
>
> Bobby
>
> -----Original Message-----
> From: Rotary motors in aircraft [mailto:
flyrotary@lancaironline.net] On
> Behalf Of Mark Steitle
> Sent: Monday, August 06, 2012 8:32 AM
> To: Rotary motors in aircraft
> Subject: [FlyRotary] Re: PP engine advice?
>
> Tracy,
>
> I ended up replacing the slide throttle with three individual 46mm
> throttle bodies. I too had trouble getting stable manifold pressure
> readings from the oil injection ports, so I installed MP taps just
> downstream of the butterflies in the TB's, one for each TB. They are
> tee'd together near the engine. That seems to be working just fine.
> I'm using the oil injection pump instead of pre-mix, so the oil
> injection ports are being used as originally intended by Mazda.
>
> If they are using a slide throttle, then the primary injectors should be
> located downstream of the slide else fuel will puddle on the upstream
> side during low throttle operation causing rough running.
>
> Update: The root of my tuning problems seems to have been the missing
> injector diodes. Once I installed the diodes, the engine idle was much
> improved and tuning has been a breeze.
>
> Mark
>
>
> On 8/5/12, Tracy <
rwstracy@gmail.com> wrote:
>> Mark. S. (and anyone else with PP engine experience)
>>
>> How did you end up getting a usable MP signal for the EC2/3? I have
>> another couple of builders who took Paul L's advice and used PP
> engines with
>> slide throttle mounted right to the ports. They are not having any
> luck
>> getting a stable MP using the oil injection ports on the rotor
> housing.
>>
>> Did you ever come up with a good solution?
>>
>> Thanks,
>> Tracy Crook
>>
>> Sent from my iPad
>>
>> On Aug 5, 2012, at 9:41 PM, Mark Steitle <
msteitle@gmail.com> wrote:
>>
>>> Charlie,
>>>
>>> My system uses those EFI filters also. They are Fram p/n G3727.
>>> They take a Saginaw fitting on the filter side (see pic). I don't
>>> recall where I purchased my AN-Saginaw fittings.
>>>
>>> Mark S.
>>>
>>> On Sun, Aug 5, 2012 at 7:16 PM, Charlie England
>>> <
ceengland@bellsouth.net>
>>> wrote:
>>> I'm not flying yet, but I more or less copied Ed Anderson's filter
>>> configuration: each high pressure pump feeds a separate GM inline
>>> filter, with the outputs from the filters T'd back together to feed
> the regulator.
>>> There are AN adapters that screw into the filter. Attached is the
>>> only pic I could find. The pumps are off the bottom of the pic.
>>>
>>> Ed, do you have the NAPA # handy?
>>>
>>> Charlie
>>>
>>>
>>> On 08/05/2012 03:35 PM, David Leonard wrote:
>>>>
>>>> So my next question is how small of filtration do we need? ie, what
>
>>>> is the size of a particle that will fit through the injector nozzle
> easily?
>>>>
>>>> I was using the Earls sintered bronze element at 35microns, but I
>>>> also could use the SS screen version at 85 mic. The Peterson in
>>>> line 600 series is MUCH more expensive and comes in 45, 60, and 100
>>>> micron SS screens.
>>>>
>>>>
http://www.jegs.com/p/Peterson-Fluid-Systems/Peterson-600-Series-Fue
>>>> l-Filters/1528539/10002/-1
>>>>
>>>> Those do have more surface area but will be a hassle for me to
>>>> retrofit, and not sure they are worth 4x the price of the earls.
>>>> Lots of other brands I have not explored yet.
>>>>
>>>> I like the sintered bronze for strength and durability. Other
> opinions?
>>>>
>>>> Dave Leonard
>>>>
>>>> On Sun, Aug 5, 2012 at 12:42 PM, David Leonard <
wdleonard@gmail.com>
>>>> wrote:
>>>> Yea, mine is an Earls cleanable high pressure with maybe 10 sq cm
>>>> worth of area. Will look into the Peterson. Thanks Tracy.
>>>>
>>>> Dave Leonard
>>>>
>>>> On Sun, Aug 5, 2012 at 10:48 AM, Tracy <
rwstracy@gmail.com> wrote:
>>>> Al probably means the filter that's on factory in-tank pumps. OK,
> but
>>>> very hard to implement on RV wet-wing tanks. I used a gascolator
> for
>>>> low side filter on my -4. Worked OK and when it clogged, switching
>
>>>> on the backup pump with main pump caused the screen disk to collapse
> and let
>>>> fuel bypass it. which is better than no fuel at
>>>> all but not an ideal solution.
>>>>
>>>> On the -8 i used a cleanable Peterson filter with TONS of filter
> area,
>>>> works great. That was a replacement for the Summit Racing fuel
> filter
>>>> with a filter element disk the size of a nickel. It clogged up in
>>>> about about 5 hours of flight.
>>>>
>>>> Tracy
>>>>
>>>> Sent from my iPad
>>>>
>>>> On Aug 5, 2012, at 10:18 AM, David Leonard <
wdleonard@gmail.com>
> wrote:
>>>>
>>>>> Yes, it was the high side filter. I don't have any low side
> filters.
>>>>> Would be interested in a source for the self-cleaning fool-proof
>>>>> low side filters that Al mentions.
>>>>>
>>>>> --
>>>>> David Leonard
>>>>>
>>>>> Turbo Rotary RV-6 N4VY
>>>>>
http://N4VY.RotaryRoster.net
>>>>>
http://RotaryRoster.net
>>>>>
>>>>> On Sun, Aug 5, 2012 at 6:34 AM, Tracy <
rwstracy@gmail.com> wrote:
>>>>> I assume Al is referring to the pump intake side filter. So for
> the
>>>>> record, was it the inlet side or the high pressure side filter that
>
>>>>> clogged? ( Both are needed ) From the symptoms I'm guessing high
>>>>> side but not sure.
>>>>>
>>>>> BTW, nice job!
>>>>>
>>>>> Tracy
>>>>>
>>>>> Sent from my iPad
>>>>>
>>>>> On Aug 4, 2012, at 3:53 PM, "Al Wick" <
alwick@juno.com> wrote:
>>>>>
>>>>>> As long as your are rebuilding, tremendous safety improvement by
>>>>>> using same fuel filter method that all cars use. No matter how
>>>>>> much foreign material you throw at it, it can't clog. It minimizes
>
>>>>>> pressure drop, so lower risk of vapor lock. Self cleaning filter.
> Self priming pumps.
>>>>>>
>>>>>> -Al Wick
>>>>>> Cozy IV powered by RDM Subaru 3.0R.
>>>>>> Expert at failure prevention methods, N9032U 240+ hours from
>>>>>> Portland, Oregon Glass panel design, Subaru install, Prop
>>>>>> construct, Risk assessment
>>>>>> info:
>>>>>>
http://www.ez.org/pages/alwick/index.htm
>>>>>> ----- Original Message -----
>>>>>> From: Jeff Whaley
>>>>>> To: Rotary motors in aircraft
>>>>>> Sent: Saturday, August 04, 2012 1:38 PM
>>>>>> Subject: [FlyRotary] Re: Rotary Forced Landing
>>>>>>
>>>>>> Dave, having gone through recently what you just experienced I
>>>>>> would like to say GOOD JOB on getting down safely and with such
>>>>>> little damage. Anyway at 1500 AGL there isn't a lot of time ...
>>>>>> obviously you made the right choices.
>>>>>>
>>>>>> Jeff
>>>>>>
>>>>>> (Rebuilding my Ride)
>>>>>>
>>>>>>
>>>>>>
>>>>>> From: David Leonard <
wdleonard@gmail.com>
>>>>>> Subject: Re: [FlyRotary] Fw: Fw: [FlyRotary] Rotary Forced
> Landing
>>>>>> Date: Fri, 3 Aug 2012 06:18:47 -0700
>>>>>> To: Rotary motors in aircraft <
flyrotary@lancaironline.net>
>>>>>>
>>>>>>
>>>>>> Sigh..
>>>>>>
>>>>>> Yup, that was me. I have been meaning to fess up. We were at about
>
>>>>>> 1500 agl when the fuses blew on my fuel pumps. I was in a close
>>>>>> formation of
>>>>>> 40 aircraft at the time too. I think I got some bad MOGAS
>>>>>> somewhere in Iowa as I did notice my fuel return flow creep
>>>>>> downward but didn't think it was a big problem.
>>>>>>
>>>>>> On the incident flight, a one hour formation flight from SQI for a
>
>>>>>> mass arrival at OSH, the return fuel flow drifted down to zero. I
>>>>>> actually though it was a sensor problem. I didn't have the ability
>
>>>>>> to give it a lot of attention because we were in a loose
>>>>>> formation. Soon after we pulled it together for a tight formation
>>>>>> power switched off. I tried to find a road, but quickly ran out of
>
>>>>>> options and put it down in a bean field. With the beans hitting
>>>>>> the flaps it brought me to a stop in about 200ft, just before I
>>>>>> would have gone into the full grown corn. As mentioned, wheel
>>>>>> pants broke in half but no other damage besides pulling bean
>>>>>> leaves out of every nook and cranny. The farmers were very nice,
>>>>>> and the stories are true... they have attractive daughters. They
> were out there barefoot in their Sunday best enjoying the excitement.
>>>>>> Helped me clean the fuel filter and replace the fuses. Within a
>>>>>> couple of hours I was able to take off from one of their driveways
>
>>>>>> as they all waived good bye (but strangely, no one took me up on
>>>>>> my offer for a ride).
>>>>>>
>>>>>> Landed at OSH just before dark to a reserved parking space and a
>>>>>> very warm reception from the formation group and friends. Great
>>>>>> support from everyone all around, though I am trying to avoid the
>>>>>> obvious new call signs they are trying to give me.
>>>>>>
>>>>>> --
>>>>>> David Leonard
>>>>>> This message, and the documents attached hereto, is intended only
>>>>>> for the addressee and may contain privileged or confidential
> information.
>>>>>> Any unauthorized disclosure is strictly prohibited. If you have
>>>>>> received this message in error, please notify us immediately so
>>>>>> that we may correct our internal records. Please then delete the
>>>>>> original message. Thank you.
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>> --
>>>> David Leonard
>>>>
>>>> Turbo Rotary RV-6 N4VY
>>>>
http://N4VY.RotaryRoster.net
>>>>
http://RotaryRoster.net
>>>>
>>>>
>>>>
>>>> --
>>>> David Leonard
>>>>
>>>> Turbo Rotary RV-6 N4VY
>>>>
http://N4VY.RotaryRoster.net
>>>>
http://RotaryRoster.net
>>>
>>>
>>> --
>>> Homepage:
http://www.flyrotary.com/
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>>>
>>> <Saginaw_2_AN.jpg>
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>>
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