From: "Todd Archer archerwt@gmail.com" <flyrotary@lancaironline.net>
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Subject: Re: [FlyRotary] Re: Rotary engine did not start -
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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Date: Wed, 29 Nov 2017 17:22:20 -0900
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Sounds like you got it sorted, Dennis. I would imagine you are good to go.

A standard shutdown practice for injected RX7s (FCs: leaky injectors 
common) is to goose the engine the instant before turning off 
ignition.   With the ignition off and the engine at =>3k, keep your foot 
to the floor.  This ingests a bunch of air without the fuel.  Minimizes 
the build-up of raw fuel for the next start.  Pretty much the same as 
the standard lean-cutoff shutdown in carbureted aircraft engines.

Todd Archer


On 11/29/2017 5:04 PM, Clouduster clouduster@austin.rr.com wrote:
>
> I had a no-start of my RX-8 in my RV-7A about three weeks ago.  I had 
> rebuilt the engine starter and after re-installing it, I started the 
> engine 3 times to make sure the starter was performing properly.  
> Everything was OK. I got in the airplane 2 days later and the engine 
> turned over but  did not start.  I ran the P 680 battery down trying 
> to start it.  I discovered I had NO compression on any of the 6 rotor 
> faces!  I checked the ignition, injectors and cleaned the plugs.  I 
> also squirted some fuel into the spark plug holes to try to get it to 
> fire.  I finally squirted 2 stroke oil into each rotor face using the 
> prop to rotate the engine. I sprayed  2 to 3 squirts per rotor face 
> using a hand oil  dispenser.  The engine fired several times but did 
> not start on the first try – I let it sit 3 hours and tried again.  It 
> started and after about 10 seconds it ran smoothly.  It filled the 
> hanger with smoke burning  the oil!
>
> I figure I must have left some unburned gasoline in the engine when I 
> tested the starter and this washed most of  the oil out of the seals 
> while sitting a couple of days. Hence no compression.  This is only a 
> guess -
>
> I ran it on the ground several times and have flown it about 5 hours 
>  – everything appears back to normal!
>
> PS – I don’t ever measure the rotor’s compression.  I only turn the 
> prop thur by hand – compression is back to  normal.
>
> Dennis Haverlah
>
> RX-8 in RV-7A
>
> About 800 hours
>


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    <div class="moz-cite-prefix">Sounds like you got it sorted, Dennis. 
      I would imagine you are good to go.<br>
      <br>
      A standard shutdown practice for injected RX7s (FCs: leaky
      injectors common) is to goose the engine the instant before
      turning off ignition.   With the ignition off and the engine at
      =&gt;3k, keep your foot to the floor.  This ingests a bunch of air
      without the fuel.  Minimizes the build-up of raw fuel for the next
      start.  Pretty much the same as the standard lean-cutoff shutdown
      in carbureted aircraft engines.<br>
      <br>
      Todd Archer<br>
      <br>
      <br>
      On 11/29/2017 5:04 PM, Clouduster <a class="moz-txt-link-abbreviated" href="mailto:clouduster@austin.rr.com">clouduster@austin.rr.com</a> wrote:<br>
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        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal">I had a no-start of my RX-8 in my RV-7A
          about three weeks ago.  I had rebuilt the engine starter and
          after re-installing it, I started the engine 3 times to make
          sure the starter was performing properly.  Everything was OK. 
          I got in the airplane 2 days later and the engine turned over
          but  did not start.  I ran the P 680 battery down trying to
          start it.  I discovered I had NO compression on any of the 6
          rotor faces!  I checked the ignition, injectors and cleaned
          the plugs.  I also squirted some fuel into the spark plug
          holes to try to get it to fire.  I finally squirted 2 stroke
          oil into each rotor face using the prop to rotate the engine. 
          I sprayed  2 to 3 squirts per rotor face using a hand oil
           dispenser.  The engine fired several times but did not start
          on the first try – I let it sit 3 hours and tried again.  It
          started and after about 10 seconds it ran smoothly.  It filled
          the hanger with smoke burning  the oil!</p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal">I figure I must have left some unburned
          gasoline in the engine when I tested the starter and this
          washed most of  the oil out of the seals while sitting a
          couple of days. Hence no compression.  This is only a guess -</p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal">I ran it on the ground several times and
          have flown it about 5 hours  – everything appears back to
          normal!</p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal">PS – I don’t ever measure the rotor’s
          compression.  I only turn the prop thur by hand – compression
          is back to  normal.</p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal">Dennis Haverlah </p>
        <p class="MsoNormal">RX-8 in RV-7A </p>
        <p class="MsoNormal">About 800 hours </p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal">  </p>
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