Today's Message Index:
----------------------
1. 06:44 AM - Re: Re: Engine Surges (Gary Aman)
2. 09:32 AM - Re: Re: Engine Surges (Lynn Matteson)
Message 1
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| Subject: | Re: Engine Surges |
Alan,
Not unusual for the engine to be tight shortly after shutdown when the cyli
nder temps are high.Forged pistons change dimension quite a bit with temp.T
hey clank a bit when cold and drag some when really heat soaked after shutd
own.That's one of the reasons .015 cold clearance is OK in some larger engi
nes.This has been my experience only and is open to revision by more knowle
dgeable sources.
G.Aman jabiru 2200A 700hrs
-----Original Message-----
From: Thruster87 <alania@optusnet.com.au>
Sent: Wed, Mar 28, 2012 9:17 pm
Subject: JabiruEngine-List: Re: Engine Surges
au>
Talked to Jab Aus and they cannot source the black floats anymore so back t
o
white.After changing idle jet to 45 and freeing the balance tube blockage t
ook
the plane for a circuit and everything went well.On the second circuit pull
ed
throttle back to 2000 rpm and it started surging again and once over the
threshold back to idle stop and the fan stopped.It started straight away an
d I
taxied back to hangar.On turning the prop at the hangar it seemed quite tig
ht
compared to pre- flight [ when it was cold] .How does your engine compare h
ot to
cold ? Cheers Alan
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=369504#369504
Message 2
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| Subject: | Re: Engine Surges |
Gary-
I don't think you'll find that the Jabiru pistons are forged.....at
least mine are not. Maybe some of them are, but mine are cast, I'm
almost 100% sure.
Lynn Matteson
Kitfox IV Speedster, taildragger
Jabiru 2200, #2062
Prince prop 64 x 30, P-tip
Electroair direct-fire ignition system
Rotec TBI-40 injection (sleeved to 36mm)
Status: flying with 1242 hrs... (since 3-27-2006)
On Mar 29, 2012, at 9:43 AM, Gary Aman wrote:
> Alan,
> Not unusual for the engine to be tight shortly after shutdown when
> the cylinder temps are high.Forged pistons change dimension quite a
> bit with temp.They clank a bit when cold and drag some when really
> heat soaked after shutdown.That's one of the reasons .015 cold
> clearance is OK in some larger engines.This has been my experience
> only and is open to revision by more knowledgeable sources.
> G.Aman jabiru 2200A 700hrs
>
>
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