Today's Message Index:
----------------------
1. 07:57 AM - Re: Schicke GR6 Voltage Regulator (Brian Ellis)
2. 09:54 AM - Re: Strange Problem (Roger Lee)
3. 10:10 AM - Re: Re: Strange Problem (william sullivan)
4. 12:03 PM - Rotax 912 ULS Strange Problem (JohnF)
5. 04:07 PM - Re: Rotax 912 ULS Strange Problem (Roger Lee)
6. 04:11 PM - Re: Strange Problem (Roger Lee)
Message 1
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| Subject: | Re: Schicke GR6 Voltage Regulator |
Hi all=0A=0AIt seems to me that Rotax are missing a trick here with their v
oltage regulators.=0A=0AAs we all know aircraft are now-carrying-more a
nd more-sophisticated-electronics-on board, yet their regulator remai
ns at-least-a 20 year old design and does-occasionally-fail causing
a frying of expensive electronics as the result of high voltage output.=0A
=0AOne would think that Rotax could offer a voltage regulator that monitors
the output voltage at its output to the aircraft supply. Should the voltag
e rise above 15v the unit would cut the output to the aircraft supply to pr
event damage to the-expensive electronics. -The aircraft could then con
tinue on the 12v supply from the on board battery.-=0A=0AThere are some a
dd ons on sale that does the same job but fitting-introspectively is usua
lly a pain; but to be able to just swap the regulator for another Rotax one
with built in protection-utilizing the Rotax plug / existing mounting ho
les is a much easier option.=0A=0ABrian -- - -=0A=0A-=0A=0A=0A___
_____________________________=0A From: R Holder <rholder@avnet.co.uk>=0ATo:
rotaxengines-list@matronics.com =0ASent: Thursday, May 31, 2012 9:35 AM=0A
Subject: RotaxEngines-List: Schicke GR6 Voltage Regulator=0A =0A--> RotaxEn
gines-List message posted by: R Holder <rholder@avnet.co.uk>=0A=0AOn 30/05/
2012 23:35, FLYaDIVE wrote:=0A=0A> BUT!- I can't believe that no one here
in the USA makes=0A> a voltage regulator!=0A=0A> There are ONLY three conn
ections - Ground - Field &=0A> Output.- Any regulator can handle that!=0A
=0AThis is not quite true. The regulator for the Rotax needs=0Ato rectify t
he AC current out of the stator first. And=0Athere is no field on a stator
!=0A=0AThe connections have to be=0A=0AStator (AC) 2 cables=0A12v output=0A
Earth output=0AWarning light=0A=0AYou may find that there is a suitable rec
tifier-regulator=0Aavailable for the smaller John Deere tractors which will
=0Ado the job.=0A=0AThere are pictures on t'internet somewhere, and althoug
h=0Ait may be a bit chunky it will be built to last !!!!!!=0A=0AHTH=0A=0ARi
=========================0A
======================
Message 2
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| Subject: | Re: Strange Problem |
Hi Bill,
If its factory oiled it won't have too much.
--------
Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Repair Center - Heavy Maint. Rated
Home 520-574-1080 TRY HOME FIRST
Cell 520-349-7056
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=374946#374946
Message 3
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| Subject: | Re: Strange Problem |
- Roger- Mine was factory oiled, but seemed to be sopping wet.- I put a
plastic bag over it for the winter, and the plastic seemed to adhere to th
e oil.- I'm going to check, whenever I get dry enough weather.
--- On Thu, 6/7/12, Roger Lee <ssadiver1@yahoo.com> wrote:
From: Roger Lee <ssadiver1@yahoo.com>
Subject: RotaxEngines-List: Re: Strange Problem
Hi Bill,
If its factory oiled it won't have too much.
--------
Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Repair Center - Heavy Maint. Rated
Home 520-574-1080- TRY HOME FIRST
Cell 520-349-7056
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=374946#374946
le, List Admin.
Message 4
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| Subject: | Rotax 912 ULS Strange Problem |
Taking Roger Lee's advise I removed the air filters, removed the oil
with detergent, dried them, put a shop vac on them and paper held nearby
was snapped on the outside and held tightly, so I know they are moving
air freely.
Re-gapped spark plugs to 0.027" VERY carefully. Reinstalled with correct
torque and heat transfer paste.
No help; still way too much mag drop and can't get even close to static
rpm I want. Mag drop 330 and 360 rpm ..static rpm WAY too low. RPM
decreases if throttle increased past 4000 rpm.
The new Rotax fuel pump shows 1.75 psi more fuel pressure than the
original pump did, so I reinstalled to old pump...ran the engine only to
find there was a serious fuel leak at one of the stems..(a new event)
..reinstalled the new fuel pump.
Ran the engine...mag drop 100rpm on both sides, static rpm 5050
This happened once before; that is, everything looks well, but next
morning it is same old problem.
Non-contact laser thermometer shows heads all within 2-degrees F after
engine was run. Differential pressure check like new on all cylinders,
each within a pound of each other.
CarbMate carb balancer show carbs balanced as near as that instrument
can measure...really close.
Adjustable prop blades set exactly at same on both sides...each reads
the same to 1/10th of a degree.
Cylinder head temps on Dynon D-180 show normal and about the same -
typically around 175-degrees F
EGT on Dynon also normal...didn't run engine long enough to see final
temp, but they are generally just fine...1200 or so - both about the
same even though not fully warmed up
All throttle and 'enrichment' cables, and settings and stops are normal;
springs OK, nothing has moved.
Added 8-gallons of fresh fuel just in case that was somehow involved
(though remote)
I gave up working on it for today...will re-cowl the engine tomorrow and
see if it stayed "OK"
John
Message 5
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| Subject: | Re: Rotax 912 ULS Strange Problem |
Damn good report, John.
First most static rpms are usually around the 4850-5000 for a WOT rpm flat and
level rpm around 5500-5600 in flight. This varies a little from prop to prop.
So the static is fine. I would fly it.
Is the 300 rpm drop only on one mag or both? Are the mag drops on each equal at
300 rpm? Is the engine smooth on the mag drop check? If it is smooth and they
both drop 300 rpm I would suspect something with the read out and not the engine
itself. If one is 60 rpm drop at 3500 rpm and the other is a 300 rpm drop
at 3500 then there is a loss of one plug.
Where are the carb vent lines attached?
--------
Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Repair Center - Heavy Maint. Rated
Home 520-574-1080 TRY HOME FIRST
Cell 520-349-7056
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=374970#374970
Message 6
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| Subject: | Re: Strange Problem |
Over oiling is a very common problem with K&N air filters, but usually not from
the factory.
When you spray one of these filters it does not need to cover every inch of the
gauze and it needs only the lightest of sprays. Just enough to turn the element
reddish and you should be able to see some of the white gauze. The oil will
spread like crazy and migrate every where so a tiny amount means a better air
flow.
--------
Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Repair Center - Heavy Maint. Rated
Home 520-574-1080 TRY HOME FIRST
Cell 520-349-7056
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=374971#374971
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