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     1. 04:25 AM - Re: Re: Prop pitch? (George Helton)
 
 
 

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Time: 
04:25:54 AM PST US
From: 
George Helton <gdhelton@gmail.com>
Subject: 
Re: Prop pitch?
      
      
      Hi Richard, it sounds like your pretty close to me. I would expect that increase
      in EGT at throttle back between 4800 and 5000 rpm.( to be avoided.) Some Rotax
      engines have that lean spot at reducing power after having been run at high
      power settings. Your static pull sounds pretty close as does you climb out rpm
      sounds good. I would suggest raising your carb needles maybe one 
      notch and installing your muffler for a little back pressure. Actually Id just
      install the muffler and try it again. Im not much on multiple adjustments at one
      time. George 
      
      Sent from my iPhone
      
      > On Mar 20, 2021, at 8:39 PM, Richard Pike <thegreybaron@charter.net> wrote:
      > 
      > 
      > Finally got everything together and flew this afternoon. WOW! The 72" prop and
      3.47:1 ratio really accelerates!
      > 
      > Still got some things to sort out, with 13 degrees of pitch, static tied down
      was 6250, climbing out the prop loaded up a bit and was only turning 6000-6100.
      Egt's were good, pulled back to 54-5500 rpm cruise, egt's were good.
      > Repitched the prop to 12 degrees, climbout was 63-6400 rpm, climbing 1,000/min,
      but as soon as I reduced throttle to 5500, the EGT's went up to 1200 degrees.
      Eased the throttle back to around 5,000, went back and landed.
      > 
      > My initial reaction is that the prop unloaded a bit much in cruise, which jacked
      the egt's, but first I'll go through the carbs and make sure that everything
      is like it's supposed to be.
      > 
      > The wife says that it is remarkably quiet, and that is w/o the after muffler
      installed.
      > 
      > --------
      > Richard Pike
      > Kolb MKIII N420P (420ldPoops)
      > Kingsport, TN 3TN0
      > 
      > Forgiving is tough, being forgiven is wonderful, and God's grace really is amazing.
      > 
      > 
      > 
      > 
      > Read this topic online here:
      > 
      > http://forums.matronics.com/viewtopic.php?p=501045#501045
      > 
      > 
      > 
      > 
      > 
      > 
      > 
      > 
      > 
      
      








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