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best props
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John Hauck



Joined: 09 Jan 2006
Posts: 4521
Location: Titus, Alabama (hauck's holler)

PostPosted: Sun Jan 07, 2018 1:00 pm    Post subject: best props Reply with quote

Reckon you are a better explainer than I am. Wink

I ended up with about 1200 hours on my two strokes before I graduated to a 912. Never used the enricher during descents, or got an indication that I needed to richen things up a bit. I normally shot landings at engine idle, and was probably too excited making wild ass descents with power on back in those golden days of utralighting.

john h
mkIII
Titus, Alabama


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John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama
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Richard Pike



Joined: 09 Jan 2006
Posts: 1487
Location: Blountville, Tennessee

PostPosted: Sun Jan 07, 2018 9:30 pm    Post subject: Re: best props Reply with quote

What John said. Prop loading is what primarily determines EGT's on 2 strokes, assuming all other things are as they should be. One of the things I like about the IVO is that once you get the jetting where it ought to be (by jetting it like Rotax says) is that you can adjust your EGT's by adding or taking away pitch. More pitch=lower EGT's. Less pitch=higher EGT's. With the IVO, you loosen the big nut and turn the hub bolt 1/2 turn coarser for winter. Lock the big nut down. When warmer weather comes, loosen the big nut, turn the big bolt 1/2 turn finer. Lock the big nut down. Go fly.
Worse case scenario? You have to raise or lower the jet needle in the clip one notch from winter to summer if modding the prop pitch does not do quite enough. Big deal.
Here is why it works that way: http://oh2fly.net/oldpoops/pg11.htm


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Richard Pike
Kolb MKIII N420P (420ldPoops)
Kingsport, TN 3TN0

Forgiving is tough, being forgiven is wonderful, and God's grace really is amazing.
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