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From: Bulent Aliev <atlasyts@bellsouth.net>
Subject: Re: [FlyRotary] Re: Difficult cold start
Date: Thu, 29 Jun 2006 16:38:34 -0400
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>

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