Return-Path: Received: from relay02.roc.ny.frontiernet.net ([66.133.131.35] verified) by logan.com (CommuniGate Pro SMTP 4.2b1) with ESMTP id 3145608 for flyrotary@lancaironline.net; Sun, 04 Apr 2004 15:35:04 -0400 Received: (qmail 24133 invoked from network); 4 Apr 2004 19:35:03 -0000 Received: from 65-73-215-188.bras01.cok.tn.frontiernet.net (HELO frontiernet.net) ([65.73.215.188]) (envelope-sender ) by relay02.roc.ny.frontiernet.net (FrontierMTA 2.3.18) with SMTP for ; 4 Apr 2004 19:35:03 -0000 Message-ID: <407063B8.16AC9D69@frontiernet.net> Date: Sun, 04 Apr 2004 14:36:24 -0500 From: Jim Sower X-Mailer: Mozilla 4.77 [en] (Win98; U) X-Accept-Language: en MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] idle speeds References: Content-Type: multipart/alternative; boundary="------------0DEF56A548ED9E02121DD758" --------------0DEF56A548ED9E02121DD758 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit <... I need to get the idle speed way down ...> You sure do. I've regaled you several times about my EZ with an O-235 idling at 800-900 rpm that could NEVER be slowed down enough to land - floated 1000' or more down every damned runway I encountered. Landed fine when I set the idle down to 500-600 rpm. Ran rough as a cob at that speed on the ground (which is why it had been set so high), but I could advance it to 800 for ground ops, and go to the idle stop on final. With all your power, I would emphatically recommend that you back the idle down till it will just barely idle on the ground. You can always taxi above the idle stop, but you can never land below it. I would also strongly recommend a shutdown switch (injectors? pumps?) near the throttle quadrant for convenient shutdown on final. A guarded switch (guarded ON) would satisfy safety considerations, and be convenient enough that you could shut down nearly as easily as pulling the mixture. That way, you have all the bases covered ... Jim S. John Slade wrote: > Last week we had some discussion on idle speeds, and I think the consensus > was to keep it around 2000 or a little under. Just for information for other > canard pusher people, I think 2000 is going to be a real problem for me. At > the current 1850 setting with the big 3 66/84 prop I have on she's pushing > hard against the brakes. I think I could taxi the length of the runway at > idle and be doing 30/40 kts at the end. On a short (3400) runway the only > way to stop might be kill the engine once on the ground, or even on short > final. So I need to get the idle speed way down. > John Slade (more power than I know what to do with) > > >> Homepage: http://www.flyrotary.com/ > >> Archive: http://lancaironline.net/lists/flyrotary/List.html -- Jim Sower ... Destiny's Plaything Crossville, TN; Chapter 5 Long-EZ N83RT, Velocity N4095T --------------0DEF56A548ED9E02121DD758 Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: 7bit <... I need to get the idle speed way down ...>
You sure do. I've regaled you several times about my EZ with an O-235 idling at 800-900 rpm that could NEVER be slowed down enough to land - floated 1000' or more down every damned runway I encountered. Landed fine when I set the idle down to 500-600 rpm. Ran rough as a cob at that speed on the ground (which is why it had been set so high), but I could advance it to 800 for ground ops, and go to the idle stop on final. With all your power, I would emphatically recommend that you back the idle down till it will just barely idle on the ground. You can always taxi above the idle stop, but you can never land below it. I would also strongly recommend a shutdown switch (injectors? pumps?) near the throttle quadrant for convenient shutdown on final. A guarded switch (guarded ON) would satisfy safety considerations, and be convenient enough that you could shut down nearly as easily as pulling the mixture.

That way, you have all the bases covered ... Jim S.

John Slade wrote:

Last week we had some discussion on idle speeds, and I think the consensus
was to keep it around 2000 or a little under. Just for information for other
canard pusher people, I think 2000 is going to be a real problem for me. At
the current 1850 setting with the big 3 66/84 prop I have on she's pushing
hard against the brakes. I think I could taxi the length of the runway at
idle and be doing 30/40 kts at the end. On a short (3400) runway the only
way to stop might be kill the engine once on the ground, or even on short
final. So I need to get the idle speed way down.
John Slade (more power than I know what to do with)
>> Homepage: http://www.flyrotary.com/
>> Archive: http://lancaironline.net/lists/flyrotary/List.html

--
Jim Sower ... Destiny's Plaything
Crossville, TN; Chapter 5
Long-EZ N83RT, Velocity N4095T
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