Today's Message Index:
----------------------
1. 01:06 AM - Re: Mitsubishi Turbo on a rotax 912 (K Dilks)
2. 03:17 PM - ROTAX 914 LOW OIL PRESSURE (ROBERT LINDSAY)
3. 04:20 PM - Re: ROTAX 914 LOW OIL PRESSURE (pjeffers@talktalk.net)
4. 04:25 PM - Re: ROTAX 914 LOW OIL PRESSURE (Roger Lee)
5. 04:41 PM - Re: ROTAX 914 LOW OIL PRESSURE (Ivan)
6. 06:04 PM - Re: ROTAX 914 LOW OIL PRESSURE (Paul McAllister)
7. 08:04 PM - Re: ROTAX 914 LOW OIL PRESSURE (ROBERT LINDSAY)
8. 08:13 PM - Re: ROTAX 914 LOW OIL PRESSURE (ROBERT LINDSAY)
Message 1
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| Subject: | Re: Mitsubishi Turbo on a rotax 912 |
I think you are missing the reasons for the tcu and the difference in price.
TCU is needed to allow the engine to operate without risk of over boost at low
altitudes but still develop a full 100 hp at 15,000 ft. A wast gate does not
work well enough.
Secondly the price is high but the exhaust , engine mount and air box are standard
fit, so add that cost in to the equation.
Power cost money.......just ask Obama LOL
--------
Austria .............
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=231621#231621
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| Subject: | ROTAX 914 LOW OIL PRESSURE |
Recently I had the need to climb to FL180 on a below standard temp day. Oi
l press in Rotax 914 UL3 (ser 4417756, 475 hrs) has always been normal, but
on this occasion while climbing 34 inches 5500 rpm thru 15000 ft, oil pres
sure began decreasing (OAT was 10 deg below stnd). At 18000 ft Grand Rapid
s EIS oil pressure alarmed at 25 psi. Power was retarded to below 65 perce
nt and descent commenced. Oil pressure returned to normal (about 50 psi) b
elow 15 Kft where OAT was near stnd. Flight continued at 12Kft at 75 perce
nt power, all engine parameters indicating normal.
Oil quantity checked after landing indicated near full. Oil is Honda GN-4
10W40. Oil pressure on several flights since (altitude below 10 Kft) has b
een normal.
Why would oil pressure drop under the above conditions? I suspect a sensin
g/indication problem.
Thanx, all. Bob Lindsay, Europa XS monogear N77EU, San Diego CA
Message 3
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| Subject: | Re: ROTAX 914 LOW OIL PRESSURE |
Hi Bob,
The one piece of info you did not supply was what was the oil temp at this time??
You had apparently been climbing at max continuous for quite a while which
inevitably gets the oil pretty warm.? My experience would indicate that even if
the temp stays within limits (just) it will result in a significant reduction
in oil pressure also within limits (just).? I suspect you are seeing a normal
consequence of high oil temp. A higher air speed in climb or better cooling
or both would probably have prevented the potential problem.
Pete Jeffers
-----Original Message-----
From: ROBERT LINDSAY <RLINDSA2@san.rr.com>
Sent: Mon, 23 Feb 2009 18:14
Subject: RotaxEngines-List: ROTAX 914 LOW OIL PRESSURE
Recently I had the need to climb to FL180 on a
below standard temp day.? Oil press in Rotax 914 UL3 (ser 4417756, 475 hrs)
has always been normal, but on this occasion while climbing 34 inches 5500 rpm
thru 15000 ft, oil pressure began decreasing (OAT was 10 deg below stnd).?
At 18000 ft Grand Rapids EIS oil pressure alarmed at 25 psi.? Power was
retarded to below 65 percent and descent commenced.? Oil pressure returned
to normal (about 50 psi) below 15 Kft where OAT was near stnd.? Flight
continued at 12Kft at 75 percent power, all engine parameters indicating
normal.
?
Oil quantity checked after landing indicated near
full.? Oil is Honda GN-4 10W40.? Oil pressure on several flights since
(altitude below 10 Kft) has been normal.
?
Why would oil pressure drop under the above
conditions?? I suspect a sensing/indication problem.
?
Thanx, all.? Bob Lindsay, Europa XS monogear
N77EU, San Diego CA
Message 4
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| Subject: | Re: ROTAX 914 LOW OIL PRESSURE |
Most of these oil pressure issues tend to be sending units or bad grounds. If you
really lose oil pressure you'll have some other serious issues to contend with.
--------
Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Service Center
520-574-1080
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=231712#231712
Message 5
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| Subject: | Re: ROTAX 914 LOW OIL PRESSURE |
As long as the oil is withing limits (as opposed to being "hot") I
would assume that the pressure would be fine. After all is not that the
function of the pressure regulator?
Ivan
----- Original Message -----
From: pjeffers@talktalk.net
To: rotaxengines-list@matronics.com
Sent: Monday, February 23, 2009 5:19 PM
Subject: Re: RotaxEngines-List: ROTAX 914 LOW OIL PRESSURE
Hi Bob,
The one piece of info you did not supply was what was the oil temp at
this time? You had apparently been climbing at max continuous for quite
a while which inevitably gets the oil pretty warm. My experience would
indicate that even if the temp stays within limits (just) it will result
in a significant reduction in oil pressure also within limits (just). I
suspect you are seeing a normal consequence of high oil temp. A higher
air speed in climb or better cooling or both would probably have
prevented the potential problem.
Pete Jeffers
-----Original Message-----
From: ROBERT LINDSAY <RLINDSA2@san.rr.com>
To: rotaxengines-list@matronics.com
Sent: Mon, 23 Feb 2009 18:14
Subject: RotaxEngines-List: ROTAX 914 LOW OIL PRESSURE
Recently I had the need to climb to FL180 on a below standard temp
day. Oil press in Rotax 914 UL3 (ser 4417756, 475 hrs) has always been
normal, but on this occasion while climbing 34 inches 5500 rpm thru
15000 ft, oil pressure began decreasing (OAT was 10 deg below stnd). At
18000 ft Grand Rapids EIS oil pressure alarmed at 25 psi. Power was
retarded to below 65 percent and descent commenced. Oil pressure
returned to normal (about 50 psi) below 15 Kft where OAT was near stnd.
Flight continued at 12Kft at 75 percent power, all engine parameters
indicating normal.
Oil quantity checked after landing indicated near full. Oil is Honda
GN-4 10W40. Oil pressure on several flights since (altitude below 10
Kft) has been normal.
Why would oil pressure drop under the above conditions? I suspect a
sensing/indication problem.
Thanx, all. Bob Lindsay, Europa XS monogear N77EU, San Diego CA
Message 6
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| Subject: | Re: ROTAX 914 LOW OIL PRESSURE |
Hi Bob,
One possibility is that you are getting oil foaming at altitude. I seem to
recall John Hurst back in the days he was at Europa that he had a problem w
ith some oils doing this.-
I can't remember which oil he had the most trouble with, but I seem to reca
ll that he got good results with Valvoline Durablend.-
Paul
--- On Mon, 2/23/09, ROBERT LINDSAY <RLINDSA2@san.rr.com> wrote:
From: ROBERT LINDSAY <RLINDSA2@san.rr.com>
Subject: RotaxEngines-List: ROTAX 914 LOW OIL PRESSURE
Recently I had the need to climb to FL180 on a
below standard temp day.- Oil press in Rotax 914 UL3 (ser 4417756, 475 hr
s)
has always been normal, but on this occasion while climbing 34 inches 5500
rpm
thru 15000 ft, oil pressure began decreasing (OAT was 10 deg below stnd).
-
At 18000 ft Grand Rapids EIS oil pressure alarmed at 25 psi.- Power was
retarded to below 65 percent and descent commenced.- Oil pressure returne
d
to normal (about 50 psi) below 15 Kft where OAT was near stnd.- Flight
continued at 12Kft at 75 percent power, all engine parameters indicating
normal.
-
Oil quantity checked after landing indicated near
full.- Oil is Honda GN-4 10W40.- Oil pressure on several flights since
(altitude below 10 Kft) has been normal.
-
Why would oil pressure drop under the above
conditions?- I suspect a sensing/indication problem.
-
Thanx, all.- Bob Lindsay, Europa XS monogear
N77EU, San Diego CA
=0A=0A=0A
Message 7
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| Subject: | Re: ROTAX 914 LOW OIL PRESSURE |
Oil temp during my cruise climb of 100 KIAS was actually a little cool at a
bout 160 to 170F.
----- Original Message -----
From: pjeffers@talktalk.net
To: rotaxengines-list@matronics.com
Sent: Monday, February 23, 2009 4:19 PM
Subject: Re: RotaxEngines-List: ROTAX 914 LOW OIL PRESSURE
Hi Bob,
The one piece of info you did not supply was what was the oil temp at thi
s time? You had apparently been climbing at max continuous for quite a whi
le which inevitably gets the oil pretty warm. My experience would indicate
that even if the temp stays within limits (just) it will result in a signi
ficant reduction in oil pressure also within limits (just). I suspect you
are seeing a normal consequence of high oil temp. A higher air speed in cli
mb or better cooling or both would probably have prevented the potential pr
oblem.
Pete Jeffers
-----Original Message-----
From: ROBERT LINDSAY <RLINDSA2@san.rr.com>
To: rotaxengines-list@matronics.com
Sent: Mon, 23 Feb 2009 18:14
Subject: RotaxEngines-List: ROTAX 914 LOW OIL PRESSURE
Recently I had the need to climb to FL180 on a below standard temp day.
Oil press in Rotax 914 UL3 (ser 4417756, 475 hrs) has always been normal, b
ut on this occasion while climbing 34 inches 5500 rpm thru 15000 ft, oil pr
essure began decreasing (OAT was 10 deg below stnd). At 18000 ft Grand Rap
ids EIS oil pressure alarmed at 25 psi. Power was retarded to below 65 per
cent and descent commenced. Oil pressure returned to normal (about 50 psi)
below 15 Kft where OAT was near stnd. Flight continued at 12Kft at 75 per
cent power, all engine parameters indicating normal.
Oil quantity checked after landing indicated near full. Oil is Honda GN-
4 10W40. Oil pressure on several flights since (altitude below 10 Kft) has
been normal.
Why would oil pressure drop under the above conditions? I suspect a sens
ing/indication problem.
Thanx, all. Bob Lindsay, Europa XS monogear N77EU, San Diego CA
Message 8
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| Subject: | Re: ROTAX 914 LOW OIL PRESSURE |
I don't know what actually causes oil to foam. Honda GN-4 was recommended
by Rotax rep Eric Tucker. I plan on trying to repeat the situation on a fo
rthcoming high altitude flight.
----- Original Message -----
From: Paul McAllister
To: rotaxengines-list@matronics.com
Sent: Monday, February 23, 2009 6:02 PM
Subject: Re: RotaxEngines-List: ROTAX 914 LOW OIL PRESSURE
Hi Bob,
One possibility is that you are getting oil foaming at altitude. I
seem to recall John Hurst back in the days he was at Europa that he had a p
roblem with some oils doing this.
I can't remember which oil he had the most trouble with, but I seem
to recall that he got good results with Valvoline Durablend.
Paul
--- On Mon, 2/23/09, ROBERT LINDSAY <RLINDSA2@san.rr.com> wrote:
From: ROBERT LINDSAY <RLINDSA2@san.rr.com>
Subject: RotaxEngines-List: ROTAX 914 LOW OIL PRESSURE
To: rotaxengines-list@matronics.com
Date: Monday, February 23, 2009, 5:14 PM
Recently I had the need to climb to FL180 on a below standard tem
p day. Oil press in Rotax 914 UL3 (ser 4417756, 475 hrs) has always been n
ormal, but on this occasion while climbing 34 inches 5500 rpm thru 15000 ft
, oil pressure began decreasing (OAT was 10 deg below stnd). At 18000 ft G
rand Rapids EIS oil pressure alarmed at 25 psi. Power was retarded to belo
w 65 percent and descent commenced. Oil pressure returned to normal (about
50 psi) below 15 Kft where OAT was near stnd. Flight continued at 12Kft a
t 75 percent power, all engine parameters indicating normal.
Oil quantity checked after landing indicated near full. Oil is H
onda GN-4 10W40. Oil pressure on several flights since (altitude below 10
Kft) has been normal.
Why would oil pressure drop under the above conditions? I suspec
t a sensing/indication problem.
font face="Arial" size="2">Thanx, all. Bob Lindsay, Europa X
S monogear N77EU, San Diego CA
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