Today's Message Index:
----------------------
1. 07:02 AM - Re: Low idle RPM recommendation on Rotax 912 UL? (Bernard Wilder)
2. 07:53 AM - Re: Pulsar-List Digest: 6 Msgs - 12/26/12 (bobh5@earthlink.net)
3. 08:24 AM - Re: Low idle RPM recommendation on Rotax 912 UL? (Myron Truex)
Message 1
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| Subject: | Re: Low idle RPM recommendation on Rotax 912 UL? |
Lockwood course instructions was for an idle of 1,400 to 1,600 BUT they add
that you shouldn't run your engine that slow,,, because, as you have found
ouit, at that slow an idle the engine doesn't run smoothly.
My engine won't stall at 1,500. But that said, I idle at no less than 2,000.
I also have a Prince P Tip. Love it ! ! !
Bernie Wilder
On Wed, Dec 26, 2012 at 4:24 PM, triumphrider <
investmentsalesconsultant@gmail.com> wrote:
> investmentsalesconsultant@gmail.com>
>
> How low should the low idle speed be adjusted for on the Rotax 912 UL?
> I had someone help with it and he said 1400 rpm and if I pull the throttle
> that low, the engine shutters. I usually taxi at around 1800 RPMs. With the
> reduction gear of the Rotax, perhaps 1400 rpm idle is too low?
>
> Engine seems dialed in at cruise and acceleration, but a little rough at
> low idle, as if the prop is not balanced. I did a few small carbon fiber
> prop ding repairs and was careful not to overweight one side. Perhaps, I
> did it inadvertently? It's a Prince P-Tip. Used to purr like a kitten. As
> the Chinese say, it it's not broken don't fix it? It was adjusted at the
> conditional inspection. Is protection too much to expect from a 850 hr.
> engine? Am I asking too much?
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=390994#390994
>
>
Message 2
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| Subject: | Re: Pulsar-List Digest: 6 Msgs - 12/26/12 |
912 should never be idled below 1600 rpm as low speeds cause gearbox to vibrate.
Mine idles around 1750 rpm, smoothly.
Prop balance will effect vibrations. I use a static tire balancer to check prop
and any minor corrections just require a spray shot of urethane spar varnish
on backside of light blade.
Carb balancing has dramatic effect on engine smoothness; I'd check that first.
Bob H
-----Original Message-----
>From: Pulsar-List Digest Server <pulsar-list@matronics.com>
>Sent: Dec 26, 2012 11:58 PM
>To: Pulsar-List Digest List <pulsar-list-digest@matronics.com>
>Subject: Pulsar-List Digest: 6 Msgs - 12/26/12
>
>*
>
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>
>HTML Version:
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> ---
> Total Messages Posted Wed 12/26/12: 6
> ----------------------------------------------------------
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>
>Today's Message Index:
>----------------------
>
> 1. 01:14 PM - Re: Pulsar-List Digest: 9 Msgs - 12/16/12 (triumphrider)
> 2. 01:25 PM - Low idle RPM recommendation on Rotax 912 UL? (triumphrider)
> 3. 02:04 PM - Re: Low idle RPM recommendation on Rotax 912 UL? (Brian Anderson)
> 4. 02:11 PM - Re: Re: Pulsar-List Digest: 9 Msgs - 12/16/12 (Brian Anderson)
> 5. 02:14 PM - Re: Low idle RPM recommendation on Rotax 912 UL? (pilot623)
> 6. 06:47 PM - Re: Low idle RPM recommendation on Rotax 912 UL? (Esa Lehto)
>
>
>
>________________________________ Message 1 _____________________________________
>
>
>Time: 01:14:32 PM PST US
>Subject: Pulsar-List: Re: Pulsar-List Digest: 9 Msgs - 12/16/12
>From: "triumphrider" <investmentsalesconsultant@gmail.com>
>
>
>Thanks for sharing your knowledge and thoughts. As a non-builder, what size/ length
>of SS Fuel Lines do I need to order for the left and right? It's a Rotax
>912 UL. Available at Aircraft Spruce?
>
>
>Read this topic online here:
>
>http://forums.matronics.com/viewtopic.php?p=390993#390993
>
>
>________________________________ Message 2 _____________________________________
>
>
>Time: 01:25:27 PM PST US
>Subject: Pulsar-List: Low idle RPM recommendation on Rotax 912 UL?
>From: "triumphrider" <investmentsalesconsultant@gmail.com>
>
>
>How low should the low idle speed be adjusted for on the Rotax 912 UL?
>I had someone help with it and he said 1400 rpm and if I pull the throttle that
>low, the engine shutters. I usually taxi at around 1800 RPMs. With the reduction
>gear of the Rotax, perhaps 1400 rpm idle is too low?
>
>Engine seems dialed in at cruise and acceleration, but a little rough at low idle,
>as if the prop is not balanced. I did a few small carbon fiber prop ding repairs
>and was careful not to overweight one side. Perhaps, I did it inadvertently?
>It's a Prince P-Tip. Used to purr like a kitten. As the Chinese say, it
>it's not broken don't fix it? It was adjusted at the conditional inspection. Is
>protection too much to expect from a 850 hr. engine? Am I asking too much?
>
>
>Read this topic online here:
>
>http://forums.matronics.com/viewtopic.php?p=390994#390994
>
>
>________________________________ Message 3 _____________________________________
>
>
>Time: 02:04:25 PM PST US
>Subject: Re: Pulsar-List: Low idle RPM recommendation on Rotax 912 UL?
>From: Brian Anderson <briana@xtra.co.nz>
>
>
>I think 1400rpm is definitely too low, and at that speed you should expect to
get
>a deal of gearbox chatter. I'm happy with the engine idling at about 1700.
>Idle should be smooth at that speed if the carbs are properly synchronised.
>
>Brian
>
>
>On 27/12/2012, at 10:24 AM, "triumphrider" <investmentsalesconsultant@gmail.com>
>wrote:
>
>>
>> How low should the low idle speed be adjusted for on the Rotax 912 UL?
>> I had someone help with it and he said 1400 rpm and if I pull the throttle that
>low, the engine shutters. I usually taxi at around 1800 RPMs. With the reduction
>gear of the Rotax, perhaps 1400 rpm idle is too low?
>>
>> Engine seems dialed in at cruise and acceleration, but a little rough at low
>idle, as if the prop is not balanced. I did a few small carbon fiber prop ding
>repairs and was careful not to overweight one side. Perhaps, I did it inadvertently?
>It's a Prince P-Tip. Used to purr like a kitten. As the Chinese say, it
>it's not broken don't fix it? It was adjusted at the conditional inspection.
>Is protection too much to expect from a 850 hr. engine? Am I asking too much?
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=390994#390994
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
>________________________________ Message 4 _____________________________________
>
>
>Time: 02:11:01 PM PST US
>From: Brian Anderson <briana@xtra.co.nz>
>Subject: Re: Pulsar-List: Re: Pulsar-List Digest: 9 Msgs - 12/16/12
>
>See my .ppt posting to the Pulsar Aviators group on Yahoo. Fuel
>Smell.PPT This gives some part numbers but the length and end fittings
>will be a custom fit, depending on how the builder did the installation.
>
>The teflon fuel lines used are from Earls, but there is an equivalent
>Aeroquip line that Aircraft Spruce can supply.
>
>Brian
>
>
>On 27/12/2012, at 10:13 AM, "triumphrider"
><investmentsalesconsultant@gmail.com> wrote:
>
><investmentsalesconsultant@gmail.com>
>>
>> Thanks for sharing your knowledge and thoughts. As a non-builder, what
>size/ length of SS Fuel Lines do I need to order for the left and right?
>It's a Rotax 912 UL. Available at Aircraft Spruce?
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=390993#390993
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
>________________________________ Message 5 _____________________________________
>
>
>Time: 02:14:05 PM PST US
>From: "pilot623" <pilot623@gmail.com>
>Subject: RE: Pulsar-List: Low idle RPM recommendation on Rotax 912 UL?
>
>
>I agree that 1400 is too low. I usually idle at 2000 to avoid the gearbox
>chatter issue.
>
>Jim
>
>-----Original Message-----
>From: owner-pulsar-list-server@matronics.com
>[mailto:owner-pulsar-list-server@matronics.com] On Behalf Of Brian Anderson
>Sent: Wednesday, December 26, 2012 4:04 PM
>Subject: Re: Pulsar-List: Low idle RPM recommendation on Rotax 912 UL?
>
>
>I think 1400rpm is definitely too low, and at that speed you should expect
>to get a deal of gearbox chatter. I'm happy with the engine idling at about
>1700. Idle should be smooth at that speed if the carbs are properly
>synchronised.
>
>Brian
>
>
>On 27/12/2012, at 10:24 AM, "triumphrider"
><investmentsalesconsultant@gmail.com> wrote:
>
>> --> <investmentsalesconsultant@gmail.com>
>>
>> How low should the low idle speed be adjusted for on the Rotax 912 UL?
>> I had someone help with it and he said 1400 rpm and if I pull the throttle
>that low, the engine shutters. I usually taxi at around 1800 RPMs. With the
>reduction gear of the Rotax, perhaps 1400 rpm idle is too low?
>>
>> Engine seems dialed in at cruise and acceleration, but a little rough at
>low idle, as if the prop is not balanced. I did a few small carbon fiber
>prop ding repairs and was careful not to overweight one side. Perhaps, I did
>it inadvertently? It's a Prince P-Tip. Used to purr like a kitten. As the
>Chinese say, it it's not broken don't fix it? It was adjusted at the
>conditional inspection. Is protection too much to expect from a 850 hr.
>engine? Am I asking too much?
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=390994#390994
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>
>
>________________________________ Message 6 _____________________________________
>
>
>Time: 06:47:15 PM PST US
>From: Esa Lehto <esalehto@yahoo.com>
>Subject: Re: Pulsar-List: Low idle RPM recommendation on Rotax 912 UL?
>
>Hi=0A-=0AMy idle speed is set as well to 2000 rpm.=0A-=0AEsa-=0A=0A
>=0A________________________________=0AFrom: pilot623 <pilot623@gmail.com>
>=0ATo: pulsar-list@matronics.com =0ASent: Wednesday, December 26, 2012 2:13
> PM=0ASubject: RE: Pulsar-List: Low idle RPM recommendation on Rotax 912 UL
>=0A=0AI agree that 1400 is too low. I usually idle at 2000 to avoid the gea
>rbox=0Achatter issue.=0A=0AJim =0A=0A-----Original Message-----=0AFrom: own
>er-pulsar-list-server@matronics.com=0A[mailto:owner-pulsar-list-server@matr
>onics.com] On Behalf Of Brian Anderson=0ASent: Wednesday, December 26, 2012
> 4:04 PM=0ATo: pulsar-list@matronics.com=0ASubject: Re: Pulsar-List: Low id
>le RPM recommendation on Rotax 912 UL?=0A=0A--> Pulsar-List message posted
>by: Brian Anderson <briana@xtra.co.nz>=0A=0AI think 1400rpm is definitely t
>oo low, and at that speed you should expect=0Ato get a deal of gearbox chat
>ter.- I'm happy with the engine idling at about=0A1700. Idle should be sm
>ooth at that speed if the carbs are properly=0Asynchronised.=0A=0ABrian=0A
>=0A=0AOn 27/12/2012, at 10:24 AM, "triumphrider"=0A<investmentsalesconsulta
>r" =0A> --> <investmentsalesconsultant@gmail.com>=0A> =0A> How low should t
>he low idle speed be adjusted for on the Rotax 912 UL?=0A> I had someone he
>lp with it and he said 1400 rpm and if I pull the throttle=0Athat low, the
>engine shutters. I usually taxi at around 1800 RPMs. With the=0Areduction g
>ear of the Rotax, perhaps 1400 rpm idle is too low?=0A> =0A> Engine seems d
>ialed in at cruise and acceleration, but a little rough at=0Alow idle, as i
>f the prop is not balanced. I did a few small carbon fiber=0Aprop ding repa
>irs and was careful not to overweight one side. Perhaps, I did=0Ait inadver
>tently? It's a Prince P-Tip. Used to purr like a kitten. As the=0AChinese s
>ay, it it's not broken don't fix it? It was adjusted at the=0Aconditional i
>nspection. Is protection too much to expect from a 850 hr.=0Aengine? Am I a
>sking too much?=0A> =0A> =0A> =0A> =0A> Read this topic online here:=0A>
>=0A> http://forums.matronics.com/viewtopic.php?p=390994#390994=0A> =0A>
>=============
>
>
>
>
>
>
>
>
Message 3
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| Subject: | Low idle RPM recommendation on Rotax 912 UL? |
Carbs balanced and Idle at 1900-2000. However, I adjusted my throttle so I
could pull it back to 1500 rpm. I could get a bit shorter roll out on
landing. You will be amazed what carb balancing can do.
_____
From: owner-pulsar-list-server@matronics.com
[mailto:owner-pulsar-list-server@matronics.com] On Behalf Of Bernard Wilder
Sent: Thursday, December 27, 2012 7:01 AM
Subject: Re: Pulsar-List: Low idle RPM recommendation on Rotax 912 UL?
Lockwood course instructions was for an idle of 1,400 to 1,600 BUT they add
that you shouldn't run your engine that slow,,, because, as you have found
ouit, at that slow an idle the engine doesn't run smoothly.
My engine won't stall at 1,500. But that said, I idle at no less than 2,000.
I also have a Prince P Tip. Love it ! ! !
Bernie Wilder
On Wed, Dec 26, 2012 at 4:24 PM, triumphrider
<investmentsalesconsultant@gmail.com> wrote:
<investmentsalesconsultant@gmail.com>
How low should the low idle speed be adjusted for on the Rotax 912 UL?
I had someone help with it and he said 1400 rpm and if I pull the throttle
that low, the engine shutters. I usually taxi at around 1800 RPMs. With the
reduction gear of the Rotax, perhaps 1400 rpm idle is too low?
Engine seems dialed in at cruise and acceleration, but a little rough at low
idle, as if the prop is not balanced. I did a few small carbon fiber prop
ding repairs and was careful not to overweight one side. Perhaps, I did it
inadvertently? It's a Prince P-Tip. Used to purr like a kitten. As the
Chinese say, it it's not broken don't fix it? It was adjusted at the
conditional inspection. Is protection too much to expect from a 850 hr.
engine? Am I asking too much?
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=390994#390994
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