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From: Bulent Aliev <atlasyts@bellsouth.net>
Subject: Re: [FlyRotary] Re: Difficult cold start
Date: Thu, 29 Jun 2006 16:30:26 -0400
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>

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
>>