From: "Stephen Izett stephen.izett@gmail.com" <flyrotary@lancaironline.net>
Received-SPF: pass
 receiver=logan.com; client-ip=209.85.216.48; envelope-from=stephen.izett@gmail.com
Content-Type: text/plain;
	charset=utf-8
Content-Transfer-Encoding: quoted-printable
Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.11\))
Subject: Re: [FlyRotary] Re: Modifying the EC2 Staging point
Date: Sun, 21 Jun 2020 08:18:23 +0800
References: <list-396202@logan.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
In-Reply-To: <list-396202@logan.com>
Message-Id: <5F847510-40CF-4E6C-8386-7BED3405D2A7@gmail.com>

Thanks Bobby.

I could see the BSFC on one of those tables but not the other marked =
Renesis.

The one that does shows a BSFC of 0.51 at ~7000 which is a bit better =
than I expected.

As far at reprogramming some chips for LS2 coil dwell. That is very =
simple if we can prove our programmers are doing the job.
Simply changing two digits in the code and the computer does the rest.

Steve Izett


> On 21 Jun 2020, at 12:58 am, Bobby J. Hughes bhughes@qnsi.net =
<flyrotary@lancaironline.net> wrote:
>=20
> Steve,
> =20
> Two dyno sheets from Daryl Drummond with BFSC for reference. One built =
for Pro formula Mazda and one for an individual according to Google.=20
> =20
> <image003.jpg>
> =20
> =20
> =20
> Bobby
> =20
> From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]=20=

> Sent: Saturday, June 20, 2020 2:46 AM
> To: Rotary motors in aircraft
> Subject: [FlyRotary] Re: Modifying the EC2 Staging point
> =20
> Hi there Le Roux.
>=20
> I thought the BSFC would more realistically be around 0.55 for best =
power in the Renesis with 10:1 compression.
> We burn PULP 95 unleaded.
> So calculated might be in the ball park of - hp =3D 16.4 x 6.2 / 0.55 =
=3D 185hp at 6800 static
> As the rpm rises on takeoff I would expect the hp to rise with rpm =
until the torque curve dives faster than the RPM rise.
>=20
> What numbers are others seeing and how do they compare with Lycoming =
powered RV=E2=80=99s etc.
>=20
>=20
> These are the numbers I got of the web for fuel weight (so not =
confirmed).
> AU PULP 6.26 lb.gal Premium 95 Unleaded here in Western Aust
> AU ULP 6.13 Standard 92 Unleaded here in Western Aust
> AU Avgas 5.84
> US Avgas 6.01=20
>=20
> Cheers
>=20
> Steve Izett
>=20
> > On 20 Jun 2020, at 2:01 pm, Le Roux Breytenbach =
breytenbachleroux@gmail.com <flyrotary@lancaironline.net> wrote:
> >=20
> > =EF=BB=BF
> > Steve: =46rom what i have read, you could use this formula to =
calculate horsepower ( or more or less)
> >=20
> > =
https://performancedevelopments.com/fuel-flow-calculations-for-horsepower/=

> >=20
> > HP =3D (GPH) x 5.92 / 0.44 (BSFC)
> >=20
> > 16,4 (GPH) x 5.92 ( weight of 1 pound of fuel )=20
> > devide by
> > 0,44 Brake Specific Fuel Consumption BSFC.=20
> >=20
> > =3D 220 Hp
> >=20
> > I could be wrong
> >=20
> > Sent from my iPhone
> > Le Roux Breytenbach=20
> >=20
> >=20
> >=20
> > Sent from my iPhone
> > Le Roux Breytenbach=20
> >> On 20 Jun 2020, at 04:49, Stephen Izett stephen.izett@gmail.com =
<flyrotary@lancaironline.net> wrote:
> >>=20
> >> =EF=BB=BFThanks Jeff and all
> >>=20
> >> Last flight (after playing around with Mode #1 tuning on the =
ground) the Primaries (4 port Red) were saturating at various times, =
indicated as Steve Boese reminded me, by the loss of RPM readouts (EM3 & =
Dynon Skyview) sensed from the Primary Injector line.
> >> Do others with small Primaries have this issue or is it a Tuning =
issue?
> >> ie. Getting modes # 3,6,2 right will spread the load between the =
Pri and Secondaries so the primaries don=E2=80=99t saturate?
> >> I do have another set of the larger (Blue) secondary injectors that =
could replace the small red Primaries giving us 4 equal injectors, if =
this was helpful.
> >> Do injectors have a sweet spot or better spray pattern at a =
particular band of duty cycle?
> >>=20
> >> We have an electric inflight adjustable prop which may make a =
difference from those with experience with FP props.
> >>=20
> >> On another note, I rechecked max fuel flow at static ~6800 rpm and =
0.92 Lambda which I think is best power. Fuel Flow peeks at 16.4 Gal/hr.
> >> It's a Renesis 4 Port with the stock exhaust header and resonator =
and a modified stock intake manifold which is basically shortened from =
23.6=E2=80=9D to 18.1=E2=80=9D.=20
> >> I had noted down that Tracy recommended 16=E2=80=9D and Paul L =
20=E2=80=9D for the intake length.
> >> What kind of hp do you think this might be producing and what are =
others seeing?
> >>=20
> >> How could we determine peak power/rpm? Could we use the airframe as =
a dyno in some way?
> >> What about at WOT clean air and level, and adjust prop pitch/rpm =
for maximum airspeed.
> >> I suppose is we kept the mixture constant we could look for highest =
fuel flow.
> >> I=E2=80=99m trying ti ascertain the best rpm for takeoff.
> >> At the moment I=E2=80=99m leaving the prop set fine and rpm is =
peaking at ~7500 on climb out.
> >>=20
> >> Your expertise and insights would be greatly appreciated.
> >>=20
> >> Steve Izett
> >>=20
> >>=20
> >>=20
> >>=20
> >>=20
> >>=20
> >>=20
> >>> On 19 Jun 2020, at 9:37 pm, Jeff Whaley jwhaley@datacast.com =
<flyrotary@lancaironline.net> wrote:
> >>>=20
> >>> I don't think you're missing anything Steve - my EC2 is the same : =
fixed at 20" ...
> >>> It was originally 15.5" and could be set anywhere ... but after =
sent back to Tracy it is now 20" and cannot be changed.
> >>> Jeff=20
> >>>=20
> >>> Hi people.
> >>>=20
> >>> I did some tuning this morning.
> >>> But I couldn't get the staging point to change.
> >>>=20
> >>> I reset all modes to default.
> >>> The built in default Stage Point on my EC2 seems to be ~20"
> >>>=20
> >>> Ran engine at the desired MAP, selected Mode #7 (I was aiming at =
15.5") and pressed the Store Button.
> >>> I also tried holding it for a few seconds.
> >>> Staging Point stayed at ~20".
> >>> What am I missing here?
> >>>=20
> >>> Steve Izett
> >>>=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.html
>=20
>=20
> --
> Homepage: http://www.flyrotary.com/
> Archive and UnSub: =
http://mail.lancaironline.net:81/lists/flyrotary/List.html
>=20
>=20
> Disclaimer
>=20
> The information contained in this communication from the sender is =
confidential. It is intended solely for use by the recipient and others =
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 =
may be unlawful.
>=20
> This email has been scanned for viruses and malware, and may have been =
automatically archived by Mimecast Ltd, an innovator in Software as a =
Service (SaaS) for business. Providing a safer and more useful place for =
your human generated data. Specializing in; Security, archiving and =
compliance. To find out more Click Here.
>=20
> <Daryl Drummond Dyno Data.jpg>--
> Homepage:  http://www.flyrotary.com/
> Archive and UnSub:   =
http://mail.lancaironline.net:81/lists/flyrotary/List.html