From: "Stephen Izett stephen.izett@gmail.com" <flyrotary@lancaironline.net>
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Subject: Re: [FlyRotary] SpeedUino
Date: Sun, 21 Jun 2020 22:39:11 +0800
References: <list-389070@logan.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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Message-Id: <F1D80FF7-6D9F-4582-81E5-05C17428460D@gmail.com>

Hi Steve Boese or other cleverer people than I.

Can you explain or point me to info regarding intake port and injector =
staging.
In the Renesis engines as an example, the various ports have valves =
(excepting the primaries) and injectors.
Mazda seems to have done magic to create an intake system that supports =
a usable torque curve over a significant range.
Now I take it that it would be a mistake to turn on injectors while that =
port was closed.
But do  they open a port, lets say the secondaries in a 4 port rotary =
but not switch on the injectors?
Now that=E2=80=99s what we are doing with our EC=E2=80=99s, Tracy has =
them on Primaries all the way up to 20=E2=80=9D MAP before the secondary =
injectors turn on.
So because most of us have removed any valve (open all the time as =
we=E2=80=99re not interested in low rpm) we have a Primary runner with =
fuel being mixed,
but a Secondary runner without fuel being mixed.
So during the intake =E2=80=9Cstroke/rotational movement=E2=80=9D the =
two masses of air from either side of the rotor, through seperate ports =
must mix to ideally create an even air/fuel mixture.
Wouldn=E2=80=99t it make sense to have fuel being mixed in that =
secondary runner?

It seems to me that smaller capacity injectors may provide better =
atomisation for lower end engine performance/economy/emissions, =
particularly when only the primary runners were active.

I=E2=80=99m also still wondering, should I consider replacing the small =
Primary Injectors that have saturated at times with larger injectors =
making 4 equal injectors?

Thanks for all the help.

Steve Izett


> On 19 Jun 2020, at 11:10 am, Steven W. Boese SBoese@uwyo.edu =
<flyrotary@lancaironline.net> wrote:
>=20
> I have a SpeedUino running a 13B test engine.  That system is already =
set up with a throttle body position input which is not used in the =
recent version I have.  A few code changes allows a potentiometer to be =
used through that input for manual mixture control.  I also found it not =
particularly difficult to come up with a dual wheel CAS file to be used =
with the Ardustim signal generator to simulate the 13B CAS for testing.
>=20
> Steve Boese
>=20
> On Jun 18, 2020, at 6:36 PM, Finn Lassen finn.lassen@verizon.net =
<flyrotary@lancaironline.net> wrote:
>=20
>> =E2=97=86 This message was sent from a non-UWYO address. Please =
exercise caution when clicking links or opening attachments from =
external sources.
>>=20
>> Actually Tracy now recommends the SpeedUino boards and using =
TunerStudio (there is a free version) as the modern solution.
>> Yes, you'll have to do a bit of work if you want redundancy and =
manual mixture control.
>> I see them on eBay for about $150 each. Add relays to switch between =
the outputs of the boards for redundancy.
>> A bit of cooperative work on the open source SpeedUino code and you =
could have manual mixture control, if not already done by now.
>> So it doesn't really doesn't have to be all that expensive. Maybe =
$400 for the hardware. Naturally, if you want an of-the-shelf solution =
and expect hand holding and support, you most likely have to pay for it.
>>=20
>> So why did I chose a RWS EC3 for the RV-4 I'm building in spite of =
Tracy's recommendation?
>> The RV-3B I bought and have been flying has RWS EC2 and EM2, so I'm =
familiar with the operation of it.
>> And I guess I was too lazy to get into SpeedUino and learn that. Just =
seemed easier to install an EC3 and go fly. Would have worked too, if I =
hadn't listened to the warnings about using the stock Renesis ignition =
coils and gone and bought LS2 coils (D585). Also in the back of my mind =
was the track record of Tracy's controllers. I never really had a =
problem with them. In my mind they were reliable and proven. I guess one =
tends towards what one is familiar with. I should say that I still kind =
of enjoy tinkering with software and hardware. There is a certain =
satisfaction in overcoming obstacles and making things work, although it =
can bevery time consuming.
>>=20
>> I think we can draw a parallel to the mindset it takes to make your =
engine installation from scratch and just install a Lycoming.=20
>>=20
>> So, with the data I now have, I think I would recommend what Tracy =
recommends for any new installations and only get spares for working =
EC2/3 installations. If I understand it right, there is wide support for =
SpeedUino out there.
>>=20
>> Finn
>>=20
>>=20
>> On 6/18/2020 6:06 PM, 12348ung@gmail.com wrote:
>>> Re Tracy ECM.
>>>                              I note all the grief that is going back =
and forward and sympathise with you all.  I had trouble with mine way =
back, sent it back to Tracy and it took 3 months before I saw it again.  =
Decided then that this was not a good way to go as Tracy was semi =
retired then already.  Tracy to me was absolutely brilliant in what he =
did, but that was 40 years ago??  So I bought a fueltech unit which is =
current technology but very dear compared to Tracy=E2=80=99s ECM.  I =
have not regretted this purchase.  The engine log can be emailed for =
support and within 24 hours you are fixed up.  Then I am totally =
computer illiterate, so unable to fix anything like that myself, so I =
pay as usual. =20
>>> Neil.
>>> =20
>>> From: Rotary motors in aircraft <flyrotary@lancaironline.net>=20
>>> Sent: Friday, June 19, 2020 2:10 AM
>>> To: Rotary motors in aircraft <flyrotary@lancaironline.net>
>>> Subject: [FlyRotary] Re: EC3 software for Renesis RX-8/LS2 coils =
fixed and uploaded
>>> =20
>>> Hi Bobby,
>>>=20
>>> Actually Tracy does have a few new EC3 boards. I didn't ask how =
many.
>>>=20
>>> The hot question really is how big is the demand (quantity)?
>>>=20
>>> I probably have enough data from him (schematics, parts lists, PCB =
layout) to get a production run done.
>>>=20
>>> Tracy is serious about having retired. I was really, really lucky to =
get his help.
>>>=20
>>> I think a big reason for his decision to retire is to have time to =
enjoy life. I think the majority of his time before his retirement was =
spent on support (phone, emails).
>>>=20
>>> He really has no economic incentive to come out of retirement.
>>>=20
>>> So while we could get a production run done, I doubt anyone would be =
willing to spend time on support -- certainly not for new installations. =
Also the variety of engines, accessories and specialized programming for =
some installations would make it a nightmare to program the chips. =
Solution for that would probably be to read the working chips for your =
installation and then program the new chips with that, but then some =
would not get the latest features (closed loop, auto program using EC3 =
w/o EM).
>>>=20
>>> I thought I might take it on, but having second thoughts :)
>>>=20
>>> Will probably be a few days before I'm ready to roll the fuselage =
out of the hangar and do engine runs.
>>>=20
>>> Finn
>>>=20
>>> On 6/18/2020 10:18 AM, Bobby J. Hughes bhughes@qnsi.net wrote:
>>> Thanks Finn. I downloaded the files and notes. Once you are =
confident the hardware and software works properly we might consider a =
onetime production run of EC3=E2=80=99s for existing EC2/3 owners. I =
would like to have a tested spare available. It would likely take =
Tracy=E2=80=99s involvement to facilitate the board build or at least =
provided the suppler information and proper Rev number.
>>> =20
>>> I really appreciate the work you, Steve Izett and Steve B. are =
doing.
>>> =20
>>> Bobby
>>> =20
>>> From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]=20=

>>> Sent: Wednesday, June 17, 2020 6:11 PM
>>> To: Rotary motors in aircraft
>>> Subject: [FlyRotary] EC3 software for Renesis RX-8/LS2 coils fixed =
and uploaded
>>> =20
>>> Here it is:
>>> =
https://drive.google.com/drive/folders/1mVzPOxUwcGUlPizxnRF40nUyKBzfT4DC?u=
sp=3Dsharing
>>> It's EC3closedloop.zip.
>>>=20
>>> You may want to grab it now in case Google decides to close my =
account :)
>>>=20
>>> You can program the 18F452 chips directly using the EC3CL8.HEX file, =
or open EC3ClosedLoop.mcp in MPLAB IDE, compile and program. This is for =
RX-8 (EC3 engine type A8), LS2 coils (D585), large secondary injectors, =
default is wide band O2 sensor.
>>>=20
>>> Turns out Tracy has never programmed or delivered an EC3 for Renesis =
with LS2 coils.
>>> Software was missing code to load LS2 coils dwell time.
>>>=20
>>> I added Steve's code for configuration bits so don't have to =
remember what to set them to when programming.
>>> I set all protection bits to zero to avoid any chip reprogramming =
troubles, but you could change to:
>>>=20
>>>=20
>>> ; CONFIG6L
>>>   CONFIG  WRT0 =3D ON             ; Write Protection bit (Block 0 =
(000200-001FFFh) write protected)
>>> Finn
>>>=20
>>> ENG            EQU    0xA8      ;PUT ENGINE TYPE CODE HERE AND CHECK =
**** ALL **** FLAGS BELOW!!!!!!!!!!!!!!!!! =20
>>>=20
>>> N109TC        EQU 0x00    ;N109TC USES A DIFFERENT assignment of =
coil drivers  CLEAR for ALL except N109TC !!!!! and KERMIT unit   20B =
controllers
>>>=20
>>> DIAG        EQU 0x00        ;DIAG =3D=3D1 ALLOWS DIAGNOSTIC USE OF =
02H&L
>>>=20
>>> ;  *****************     CHECK ALL FLAGS BEFORE PROGRAM MING CHIPS  =
!!!!!   **************************************************
>>>=20
>>> ;   ***************    DWELL TIME FLAGS   *SET ONLY ONE*      =
***********************************************
>>>=20
>>> RX8COIL        EQU    0x00        ;1=3D 2.6MS DWELL TIME  (RX-8 =
COIL)
>>> RX7COIL        EQU 0x00        ;1=3D 3.5MS DWELL TIME USED   (also =
used for A7 2007 option)=20
>>> LS1COIL        EQU    0x00        ;1=3D 4.3 MS DWELL USED=20
>>> HONDACOIL    EQU 0x00        ;1=3D 1.7 MS DWELL            (A REALLY =
TINY COIL)
>>> LS2COIL        EQU    0x01        ;1=3D 4.0 MS DWELL       =20
>>>=20
>>>  =20
>>> TURBO        EQU    0x00        ;0 =3D NA, 1 =3D TURBO VERSION     =
(BIT 0 SET IN ECINFO IF TRUE)
>>> BFACTOR        EQU    D'20'        ;BOOST RETARD FOR IGNITION TIMING =
 lower value =3D more boost retard (25 IS USED FOR MOST ROTARY 20 on =
03-05-09,
>>> LGSEC        EQU    0x01        ;0 =3D PRI & SEC INJECTORS SAME SIZE =
 1 =3D LARGER SECONDARY INJECTORS (RENESIS 4 port)
>>> WIDEBAND    EQU 0x01        ;0 =3D NARROWBAND O2 SENSOR IN USE, 1 =3D =
WIDEBAND SENSOR IN USE.
>>> TEMPSENSOR    EQU    0x00        ;0 =3D THERMISTOR, 1 =3D LM34
>>> MAPSENSOR    EQU    0x00        ;0 =3D MPX4250 SENSOR, 1 =3D MPX4115 =
(EARLIER VERSION OF EC2 ONLY)
>>> BUSENSOR    EQU    0x00        ;0 =3D NO BACKUP SENSOR, 1 =3D BACKUP =
INSTALLED (0xA8,0xA9,AB,AD,B1,B2,B4 0-200 ENGINE ONLY)
>>> BREW        EQU    0x00        ;0 =3D SET TO 1 FOR 3RD GEN 13BREW =
ENGINES :  COMPENSATES FOR 5 DEG EARLIER 3RD GEN TIMING OF CAS
>>> ONEINJ        EQU    0x00        ;0 =3D NORMAL 2 INJECTOR PER ROTOR  =
1 =3D 1 INJ PER ROTOR  (NOT RECOMMENDED)
>>> CONT        EQU    0x00        ;0 =3D NORMAL 0xA9 ENGINE, 1 =3D =
CONTINENTAL/Lyc VARIENT (also sets bu at 18 geg before primary)
>>> EMT            EQU    0x00        ;0 =3D A9 W/ TRIG @ 6 DEG ATDC   1 =
=3D TDC @ TOOTH 11 (ELECTROMOTIVE TIMING SPEC) also sets BU at 180 deg
>>> A72007        EQU    0x00        ;0 =3D PRE 2005 SUBE EJ25   1 =3D =
2005 OR LATER EJ25 W/ RX-8 TYPE CAS         =20
>>> WTF         EQU 0x00        ;0 =3D normal version  1 =3D BRAT  - AKA =
- WhatTheFuck project version with transmission control functions       =20=

>>>=20
>>> TBINJ        EQU    0x00        ;1=3D THROTTLE BODY INJECTION FLAG=20=

>>> LS2_60_2    EQU    0x00        ;1=3D LS2 ENGINE EQUIPPED W/60-2 =
TOOTH TRIGGER WHEEL  (USE ENG CODE 0xAB)
>>> =20
>>>=20
>>> Disclaimer
>>>=20
>>> The information contained in this communication from the sender is =
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authorized to receive it. If you are not the recipient, you are hereby =
notified that any disclosure, copying, distribution or taking action in =
relation of the contents of this information is strictly prohibited and =
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>>>=20
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>>>=20