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From: Steve Brooks <prvt_pilot@yahoo.com>
Organization: Home
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: Difficult cold start
Date: Thu, 29 Jun 2006 20:43:29 -0400
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Message-Id: <200606292043.29878.prvt_pilot@yahoo.com>

Buly,
I've never used full rich or that much priming, so maybe that's too much ?
Compression should be easy enough to check to eliminate that.

Maybe some others have some ideas.

Steve

On Thursday 29 June 2006 4:38 pm, Bulent Aliev wrote:
> That crossed my mind, but I crank up the mixture to full rich and hit
> the primer up-to 6 times. Than have to hit the cold start to get it
> to rpm and than it is fine. Wander if the compression is low?
> Buly
>
> On Jun 29, 2006, at 4:34 PM, Steve Brooks wrote:
> > Buly,
> > Are you rich enough ??
> >
> > When I cold start, I turn the mixture to 3 o'clock,
> > cold start on, bump the prime twice, and hit the
> > starter.
> >
> > Even after sitting for a month or more, it fires up
> > after about 2-3 seconds of cranking.
> >
> > If I don't have the mixture turned to rich, or the
> > cold start on though, it won't fire.
> >
> > Steve
> >
> > --- Bulent Aliev <atlasyts@bellsouth.net> wrote:
> >> Steve, I have cut off switches on my pumps and I
> >> shut the engine by
> >> shutting the fuel pumps off. The strange thing is
> >> that once it
> >> sputters, I have to give it a boost with the cold
> >> start, or it will
> >> die again? Maybe I have to install the bypass fuel
> >> bleed circuit? all
> >> my injectors are uphill and any fuel leaking, will
> >> go in the engine.
> >> Buly
> >>
> >> On Jun 29, 2006, at 4:09 PM, Steve Brooks wrote:
> >>> Buly,
> >>>
> >>> I have the opposite problem.  When hot,, mine
> >>
> >> start
> >>
> >>> somewhat hard.  Especially if it has sat for a
> >>
> >> while
> >>
> >>> and has a good heat soak.  I believe that my
> >>
> >> intake
> >>
> >>> gets hot, and is what causes my hard start when
> >>
> >> hot.
> >>
> >>> On your problem, I used to have an issue with cold
> >>> start, before I added a cutoff switch for the
> >>
> >> primary
> >>
> >>> FI pump.  I had trouble leaving pressure on the
> >>
> >> fuel
> >>
> >>> rail, because it seeped through the injectors and
> >>
> >> ran
> >>
> >>> out of the throttle body.  Some ran into the
> >>
> >> engine
> >>
> >>> also, which caused it to be flooded.  Wet plugs
> >>
> >> are
> >>
> >>> hard to get started.
> >>>
> >>> On shut down, I turn off the primary FI pump, and
> >>
> >> let
> >>
> >>> the engine die before cutting off the master
> >>
> >> switch.
> >>
> >>> No more problem with the flooding.  Also, if I do
> >>> flood it (hot start), I shut off the fuel pumps,
> >>
> >> and
> >>
> >>> when the engine fires up, I flip the pump on and
> >>
> >> the
> >>
> >>> engine continues running.
> >>>
> >>>
> >>> FWIW,
> >>> Steve Brooks
> >>>
> >>>
> >>> If your problem is flooding, I can see why priming
> >>> doesn't help.
> >>>
> >>> --- Bulent Aliev <atlasyts@bellsouth.net> wrote:
> >>>> Today I did couple of fast taxis with my test
> >>
> >> pilot
> >>
> >>>> that flew the
> >>>> plane the first time with the turbo and fixed
> >>
> >> pitch
> >>
> >>>> prop.
> >>>> We had 500 pounds on the front seat and the plane
> >>>> lifted off the
> >>>> runway in less then 1500 ft. He said it is a
> >>
> >> great
> >>
> >>>> improvement from V.
> >>>> 1.0. That's the good part. Last few times I had
> >>>> trouble starting
> >>>> cold. If I give it a sniff of the starting fluid
> >>
> >> it
> >>
> >>>> will sputter and
> >>>> I have to turn on the Cold Start for a second or
> >>
> >> two
> >>
> >>>> to get it going.
> >>>> Before start I hit the primer 4-6 times, but it
> >>
> >> does
> >>
> >>>> not help. After
> >>>> it worms up, starts instantly. Anybody with ideas
> >>
> >> to
> >>
> >>>> improve the
> >>>> situation? Thanks.
> >>>> Buly
> >>
> >> --
> >> Homepage:  http://www.flyrotary.com/
> >> Archive and UnSub:
> >> http://mail.lancaironline.net/lists/flyrotary/
> >
> > --
> > Homepage:  http://www.flyrotary.com/
> > Archive and UnSub:   http://mail.lancaironline.net/lists/flyrotary/
>
> Buly
> http://tinyurl.com/dcy36
>
>
>
>
> --
> Homepage:  http://www.flyrotary.com/
> Archive and UnSub:   http://mail.lancaironline.net/lists/flyrotary/