Tony,
The Rotax can be kept quite simple as it is using Bing carbs and feeding
independent cylinders.
My recommendation for the Rotax is:
Two CHT on Cyl 1 and 3. Just to monitor the temp extremes of coolest
and warmest.
Oil Temp and Pressure using the VDO senders on the Rotax.
Two 2 EGT on the back two cylinders.
This helps determine if one carb is leaning or having problems vs
the other when troubleshooting the rough running engine. It is not
necessary and I don't have them on mine as you can hear and feel if the
engine is out of balance.
If you use round VDO or Mitchell gauges you do not need to buy new CHT,
or Oil and temp/pressure senders. They work fine using the Rotax
senders. To monitor EGT, just purchase the Westach clamp on probe for
the Rotax 912 or the bayonette type for the 914 since it has the bosses
welded in already...
If you install a Dynon or Grand Rapids or similar EFIS / Engine Monitor
system you must buy their probes for CHT and EGT .
Fuel pressure is a must for me as it an ammeter and voltmeter. If you
use a constant speed prop a manifold pressure gauge is essential.
My basic round dial setupfor the 914 is TACH, MAN PRESS, OIL T, OIL P,
CHT #3 cyl (one), FUEL PRESS, AMPS&VOLTS (one one gauge by Westach).
Regards,
Bud
----- Original Message -----
From: Tony Renshaw<mailto:tonyrenshaw268@gmail.com>
To: europa-list@matronics.com<mailto:europa-list@matronics.com>
Sent: Sunday, April 17, 2011 11:12 PM
Graham and co,
I was thinking in terms if a 4 cylinder Rotax and
Realize your advice pertained to the 6 cylinder
Jabiru and to be able to monitor each cylinder.
(Buenos Aires to Sydney yesterday. Brain is about
Over International dateline, or the Pacific somewhere,
certainly not in my body.)
Reg
Tony Renshaw
On 18/04/2011, at 5:17 AM, GRAHAM SINGLETON
<grahamsingleton@btinternet.com<mailto:grahamsingleton@btinternet.com>>
wrote:
Rick
there's a lot of good experience out there for you to benefit from.
(I don't have much)
I recommend a good engine monitor with 6 EGTs and 6 CHTs, Mixture
distribution is tricky and important.
Graham
-------------------------------------------------------------------------
---
From: AirEupora
<AirEupora@sbcglobal.net<mailto:AirEupora@sbcglobal.net>>
To: europa-list@matronics.com<mailto:europa-list@matronics.com>
Sent: Sunday, 17 April, 2011 18:41:04
Subject: Europa-List: Re: Jabiru vs. Rotax
<AirEupora@sbcglobal.net<mailto:AirEupora@sbcglobal.net>>
You are right Kevin. Trying to compare a Jabiru to a Rotax 912 or
914 is like comparing Apples and Oranges. Both taste good.
The Jabiru will use a little over one gallon more per hour so it
will cost me $5.00 more an hour to operate. If I get to fly 100 hour
this coming year it will cost me $500.00 dollars this year over your
cost for fuel. I can still divide that into the initial cost firewall
forward.
I looked on the web pages today and Rotax 912ULS is 21K plus the
cost of firewall forward vs. 18K for everything on the Jabiru.
Rick Stockton
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=337229#337======
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