Today's Message Index:
----------------------
1. 06:50 PM - Re: RotaxEngines-List Digest: Capacitor (Roger Lee)
2. 07:04 PM - Ethanol/methanol. Myth or fact (Roger Lee)
3. 07:33 PM - Dynamic prop balance and Tips (Roger Lee)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: RotaxEngines-List Digest: Capacitor |
Hi All,
Just spent the last three days in a Rotax 912 class. The capacitor is only necessary
if you don't want to fry your avionics/circuts from overcharging. If the
regulator/rec. fails then there is nothing to stop severe over charging from
the engine and this will trash your avioncs/circuts. The capacitor acts to help
protect your investment. Those who have had reg/rec failures have paid without
capacitors. Your right it is not needed to run the engine, but if you have
a reg/rec. failure then you have no one to blame, but yourself for trashing your
system. Pay a little now or pay big$ later. Think of it like insurance. You
don't usually need auto insurance, but for those of you that have been involved
in an accident then I bet you were happy you didn't have to pay the whole
thing out of pocket. Pay a little now for piece of mind, well that can go a long
way. I have had reg/rec failures over the years and if you use them long enough
then you may also. In other words why gamble with your big dollar investment
for a couple of bucks. Doesn't seem like a hard choice to me.
Check with Bob at aero electric, he is on top of things.
--------
Roger Lee
Tucson, Az.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p-935#95935
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Ethanol/methanol. Myth or fact |
Hi Guys,
Myth
Just spent the last few days at a Rotax repairman course. Bottom line for the ethanol/methanol
is don't worry about it. It might rob a little power, but will
not hurt a Rotax engine. Not all engines can say that, but Rotax can. The factory
did test up to 5% because of places around the world that use it and that
is why you see it printed in their manual, but just didn't test more. They can
not test all variables from users from around the world. There are some places
in the world that add up to 15-20%. There is nothing in the Rotax engine that
comes in contact with fuel that this will bother. This comes fro Eric Tucker
from the Rotax/Kodiak. He is the go to man for all engine issues of any kind
including accident investigation, trouble shooting, maint. instruction and tech
support. He has seen it all, more or less.
He is also the one that says put the capacitor in and save yourself some headaches.
--------
Roger Lee
Tucson, Az.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p-939#95939
Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Dynamic prop balance and Tips |
Hi All,
From Eric Tucker at Kodiak/Rotax.
The 912 came out in 1989 and the certified S came out in 1990. The original TBO
was 600 hrs. Rotax currently produces 5k 912's a year. With a little more data
they might go to 1800 hr. TBO. Business is booming worldwide for the Rotax.
I recommend evryone tha works on a Rotax engine take the class. Lots of good info.
1. If you built or changed your prop then you should get a Dynamic prop balance
for the longevity of your gearbox.
2. The engine was set up to run better temps. and vibration smoothness at 4800-5200
rpm. 4700 and below usually run a little more temp, but more vibration,
whether you feel it or not. I have heard of some guys that want to run the engine
at 5500 rpm all the time, well yes it can, but pay more in excessive wear
later.
3. Mufflers should have 5 liters volume for your Rotax 912uls/s to have a tuned
exhaust.
4. You 912 was set up to fly for up to 30 minutes at 75% power if you lose oil
pressure. Yes, btter to land, but not at the expense of crashing. Yes the engine
will need some work if you go for the 75% at 30 min. Remember your cylinders
are not water cooled, only the heads.
5. Water temp gauges are not needed if you are keeping you CHT's in limits.
6. Use only mineral spirits to clean you aluminum engine if it becomes necessary.
If you use some types of cleaners and note that there are color changes then
this is undesirable.
7. clean your carbs with only mineral spirits. No carb cleaners. They are too harsh.
8. No automotive wire connectors are supposed to be used.
9. Rotax would like to see an oil sample sent in to analysis lab once a year at
annual.
10. Shock cooling a Rotax is not an issue while flying. Lots of data to support
this.
Just some tips and issues disscused at the Rotax class. If you haven't been and
heard something from a friend or other mechanic then it is just hearsay or some
other logic or experience from a different engine type.
There have been quite a few items that have changed over the years and some of
the old ideas do not apply to todays engines v.s. 10-15 year old 912's.
--------
Roger Lee
Tucson, Az.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p-948#95948
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|