From: "Stephen Izett stephen.izett@gmail.com" <flyrotary@lancaironline.net>
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Subject: Re: [FlyRotary] Re: First engine run -- prop or not?
Date: Mon, 25 May 2020 15:24:16 +0800
References: <list-286258@logan.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
In-Reply-To: <list-286258@logan.com>
Message-Id: <CD26DA58-325D-46CB-9742-07629B8735C4@gmail.com>

Hi again Finn

Pretty sure the EM3 requires injector pulse input for tach and fuel =
flow.
See the pinout/in instructions:
TB4-3       TACH & FUEL FLOW SENSE  FUEL INJECTOR 1 LEAD ON EC3 & FUEL =
INJECTOR
The previous pin is for engines without an EC2/3 for their Tach.

Steve


> On 25 May 2020, at 3:17 pm, Stephen Izett stephen.izett@gmail.com =
<flyrotary@lancaironline.net> wrote:
>=20
> Hi there Finn
>=20
> Its exciting when it first starts and disappointing when it doesn=E2=80=99=
t run sweet.
> Congrats.
>=20
> Steve Izett
>=20
>> On 25 May 2020, at 10:01 am, Finn Lassen finn.lassen@verizon.net =
<flyrotary@lancaironline.net> wrote:
>>=20
>> Probably too early to give you that. (Used 8.10 and PICkit2).
>>=20
>> Ran for the first time today (no prop).
>>=20
>> Over speeding not an issue. Ran like a Harley :( =20
>> No sure if because no prop or because not tuned yet or if something =
else wrong.
>>=20
>> Zero RPM readout on EM3. I must have misunderstood the instructions =
or the program. I thought the EM3 got RPM from the EC3, so I didn't wire =
the tach input to the EM3.
>> EM3 shows "NOP" until EC3 is turned on. Then shows "0".
>>=20
>> Only did a couple of runs. Fuel pumps started leaking badly around =
O-rings when I adjusted fuel pressure up to 37psi (engine not running). =
Pooled up in fuselage. Need to fix before I try running again. Gas is =
cheap, but not that cheap. I'll try copper washers on the pressure =
(output) side instead of the o-rings.
>> <hdhnppaldlddbemj.jpg>
>> Yes, I know, not pretty. Threaded the output fitting at an angle :(=20=

>> Too lazy to redo the output block.=20
>> I also need to bend a new input tube without a kink.
>>=20
>> Max oil pressure only about 50 psi, hopefully because of low RPM.
>> Forgot to turn on master switch so alternator didn't come on-line.
>> Didn't log the run where that worked.
>>=20
>> Anyhow, can now say I've run the engine :)
>>=20
>> Finn=20
>>=20
>> On 5/22/2020 6:12 AM, Stephen Izett stephen.izett@gmail.com wrote:
>>> Great work Finn
>>> Could I get the MPLABs version your using and any more info for the =
build.
>>> I could build and program and confirm the burn but the EC3 ran like =
a dog.
>>>=20
>>> Steve
>>>=20
>>>=20
>>>=20
>>>=20
>>>> On 22 May 2020, at 9:16 am, Finn Lassen finn.lassen@verizon.net =
<flyrotary@lancaironline.net>
>>>> wrote:
>>>>=20
>>>> Well, after several hours of Murphy working overtime, I finally was =
able to get the wiring on my EC3 chip programming board right, chips =
programmed and EC3 installed.
>>>>=20
>>>> Flux capacitor fluxing, injectors clicking and spark plug firing.
>>>>=20
>>>> Time to get the wheels on and roll it out and start the engine.
>>>>=20
>>>> Oh, wait, guess I need to finish and install the prop :(
>>>>=20
>>>> Finn
>>>>=20
>>>>=20
>>>> On 5/21/2020 9:23 AM, Finn Lassen=20
>>>> finn.lassen@verizon.net
>>>> wrote:
>>>>=20
>>>>> 1) Without prop any vibration will be from engine and PSRU and can =
inspect engine (leaks, etc.) with no fear of prop.
>>>>>=20
>>>>> 2) With prop less chance of over rev and some cooling air through =
rads and oil cooler.
>>>>>=20
>>>>> What do you think?
>>>>>=20
>>>>> Finn
>>>>>=20
>>>>>=20
>>>>>=20
>>>>> --=20
>>>>> Homepage: =20
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>>=20
>>=20
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