Today's Message Index:
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1. 02:03 AM - Re: Rotax 912 and Carb ice? (mjb777)
2. 02:23 AM - Re: Re: Rotax 912 and Carb ice? (Barry J Edwards)
3. 03:02 AM - Re: Re: Rotax 912 and Carb ice? (Keith Palmer)
4. 08:14 AM - Re: Re: Rotax 912 and Carb ice? (Sonja Englert)
5. 01:21 PM - Re: Rotax 912 and Carb ice? (mjb777)
6. 02:05 PM - Re: Re: Rotax 912 and Carb ice? (Brian Anderson)
7. 02:36 PM - Re: Re: Rotax 912 and Carb ice? (Dennis Adams)
8. 06:20 PM - Re: Re: Rotax 912 and Carb ice? (Myron Truex)
9. 08:41 PM - Re: Rotax 912 and Carb ice? (mjb777)
10. 11:23 PM - Re: Re: Rotax 912 and Carb ice? (Barry J Edwards)
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| Subject: | Re: Rotax 912 and Carb ice? |
Thanks guys,
I have seen the water manifold units and now the UK company that makes them is
even selling them, along with other 912 cooling system products on ebay.
Anyone out there running cold air induction? Notice a difference?
I am interested as I read in the Rotax manuals that this is the only way to achieve
rated power and economy.
Regards,
Matt.
--------
Pulsar 1 TD Kit.
Captain B777.
Licenced Aircraft Maintenance Engineer.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=422083#422083
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| Subject: | Re: Rotax 912 and Carb ice? |
The thing about rated power is that you only ever use it on take-off (OK th
e most important time!) as most of the time you will be flying at 75% power
=2E I=99ve never had any problems getting of of our 500 yard grass st
rip in the UK, even with a hot engine on a hot day (yes we do get hot days
in the UK!). I think any marginal increase in power you may get with a cold
air system will be off-set by the increased weight and complexity of it. K
eep it simple, keep it working.
Barry
G-XPXP 912 Taildragger UK 1000+ hrs
From: mjb777
Sent: Saturday, April 19, 2014 10:03 AM
Subject: Pulsar-List: Re: Rotax 912 and Carb ice?
Thanks guys,
I have seen the water manifold units and now the UK company that makes them
is even selling them, along with other 912 cooling system products on ebay
=2E
Anyone out there running cold air induction? Notice a difference?
I am interested as I read in the Rotax manuals that this is the only way to
achieve rated power and economy.
Regards,
Matt.
--------
Pulsar 1 TD Kit.
Captain B777.
Licenced Aircraft Maintenance Engineer.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=422083#422083
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| Subject: | Re: Rotax 912 and Carb ice? |
Matt, I read up on cold/ram induction many years ago, definitely worth
reading up on, on the internet. Also helps with prop settings & in the long
run consumption.
Go well
Keith
-----Original Message-----
From: owner-pulsar-list-server@matronics.com
[mailto:owner-pulsar-list-server@matronics.com] On Behalf Of mjb777
Sent: Saturday, April 19, 2014 11:03 AM
Subject: Pulsar-List: Re: Rotax 912 and Carb ice?
Thanks guys,
I have seen the water manifold units and now the UK company that makes them
is even selling them, along with other 912 cooling system products on ebay.
Anyone out there running cold air induction? Notice a difference?
I am interested as I read in the Rotax manuals that this is the only way to
achieve rated power and economy.
Regards,
Matt.
--------
Pulsar 1 TD Kit.
Captain B777.
Licenced Aircraft Maintenance Engineer.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=422083#422083
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| Subject: | Re: Rotax 912 and Carb ice? |
I have no carburetor heat on my 912 and have not needed it. The exhaust
mufflers next to the carbs keep them from getting cold enough to form ice.
Sonja
On Sat, Apr 19, 2014 at 2:03 AM, mjb777 <mattbrock777@gmail.com> wrote:
>
> Thanks guys,
>
> I have seen the water manifold units and now the UK company that makes
> them is even selling them, along with other 912 cooling system products on
> ebay.
>
> Anyone out there running cold air induction? Notice a difference?
>
> I am interested as I read in the Rotax manuals that this is the only way
> to achieve rated power and economy.
>
> Regards,
>
> Matt.
>
> --------
> Pulsar 1 TD Kit.
> Captain B777.
> Licenced Aircraft Maintenance Engineer.
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=422083#422083
>
>
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| Subject: | Re: Rotax 912 and Carb ice? |
Makes sense Sonja.
I am thinking of building an exhaust like Ricky Thomasons. With your engine installation
experience, do you think that a system like his, with the mufflers
further away from the carbs would provide sufficient heating? Just after your
thoughts, as I know that the only true way to find out is via testing.
Any one with Ricky's style of exhaust have any comments?
Regards,
Matt.
--------
Pulsar 1 TD Kit.
Captain B777.
Licenced Aircraft Maintenance Engineer.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=422114#422114
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| Subject: | Re: Rotax 912 and Carb ice? |
Matt,
I have Ricks exhaust. Works well. The air in the cowling space still gets hot and
the carbs are still quite close to the rear of the muffler and the exhaust
pipes off the two rear cylinders.
Be aware though that the Bing carbs are very sensitive to to ambient air pressure,
or rather any difference in air pressure between the inlet and the pressure
sense port [the one with the little tube attached on the side of the carb.].
There have been some interesting loss of power moments in installations that
do not manage that carefully. A lot of Jabiru engine owners have issues here,
and they have only one Bing carb to manage.
Brian
On 20/04/2014, at 8:17 am, mjb777 <mattbrock777@gmail.com> wrote:
>
> Makes sense Sonja.
>
> I am thinking of building an exhaust like Ricky Thomasons. With your engine
installation experience, do you think that a system like his, with the mufflers
further away from the carbs would provide sufficient heating? Just after your
thoughts, as I know that the only true way to find out is via testing.
>
> Any one with Ricky's style of exhaust have any comments?
>
> Regards,
>
> Matt.
>
> --------
> Pulsar 1 TD Kit.
> Captain B777.
> Licenced Aircraft Maintenance Engineer.
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=422114#422114
>
>
>
>
>
>
>
>
>
>
Message 7
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| Subject: | Re: Rotax 912 and Carb ice? |
I have Ricky's exhaust and have flown my Pulsar XP in 7 degree F with
no problems. I always warm the engine oil to 120 degrees or better
and keep an eye out for the dew point.
The close cowling really helps keep the carbs warm. Also I block
about half of the incoming air.
Dennis Adams
Sent from an IPad
On Apr 19, 2014, at 2:25 PM, mjb777 <mattbrock777@gmail.com> wrote:
Makes sense Sonja.
I am thinking of building an exhaust like Ricky Thomasons. With your
engine installation experience, do you think that a system like his,
with the mufflers further away from the carbs would provide sufficient
heating? Just after your thoughts, as I know that the only true way to
find out is via testing.
Any one with Ricky's style of exhaust have any comments?
Regards,
Matt.
--------
Pulsar 1 TD Kit.
Captain B777.
Licenced Aircraft Maintenance Engineer.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=422114#422114
Message 8
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| Subject: | Re: Rotax 912 and Carb ice? |
Remember, Carb Ice is not necessarily associated with cold weather. In both
cases mine occurred in very moderate temps but high humidity. In each case I
had not properly warmed my engine. In one specific case I was in a hurry to
avoid fog. I started the engine and went to the end of the runway and did my
runup. A very short distance but the sucker hole was moving so I jumped off
the runway. This runway has a 50 plus drop off at each end that ends in the
Pacific Ocean. On climb out the engine went rough. I circled the airport
climbing up to about 10,000 feet to look over the coastal range. Things were
clear and the engine was nice and warm and running like a Timex. The airport
was closing out quickly so I headed East knowing I could glide in worst case
to the highway on the other side of the mountain. Things went well and in
less than two hours we were home.
>From both of my experiences I believe warming the engine oil to the proper
level first will prevent carb ice. That said, I added some landing lights at
the cowl inlets that served a couple of purposes. Lights of course and a
signifigant close out of the inlet which was a bonus in Winter.
-----Original Message-----
From: owner-pulsar-list-server@matronics.com
[mailto:owner-pulsar-list-server@matronics.com] On Behalf Of Dennis Adams
Sent: Saturday, April 19, 2014 4:29 PM
Subject: Re: Pulsar-List: Re: Rotax 912 and Carb ice?
I have Ricky's exhaust and have flown my Pulsar XP in 7 degree F with no
problems. I always warm the engine oil to 120 degrees or better and keep an
eye out for the dew point.
The close cowling really helps keep the carbs warm. Also I block about half
of the incoming air.
Dennis Adams
Sent from an IPad
On Apr 19, 2014, at 2:25 PM, mjb777 <mattbrock777@gmail.com> wrote:
Makes sense Sonja.
I am thinking of building an exhaust like Ricky Thomasons. With your engine
installation experience, do you think that a system like his, with the
mufflers further away from the carbs would provide sufficient heating? Just
after your thoughts, as I know that the only true way to find out is via
testing.
Any one with Ricky's style of exhaust have any comments?
Regards,
Matt.
--------
Pulsar 1 TD Kit.
Captain B777.
Licenced Aircraft Maintenance Engineer.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=422114#422114
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| Subject: | Re: Rotax 912 and Carb ice? |
Great info, and thanks everyone.
I think I have a plan now. Something along the lines of Ricky's exhaust, and will
just stick with what works, the individual air filters on the Bings, inside
the cowling.
I think I'll have a good look at those UK water jacket extensions for the Bings
also unless anyone has had any bad experience with them?
Myron, do you have any pictures of your landing light cowl inlet modifications?
It gets pretty cold and pretty warm in Oz, any temperature issues at all with the
smaller inlets?
Regards,
Matt.
--------
Pulsar 1 TD Kit.
Captain B777.
Licenced Aircraft Maintenance Engineer.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=422140#422140
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| Subject: | Re: Rotax 912 and Carb ice? |
One point on the air inlet close-outs. I tried this and found it beneficial
, however, my engine is an old one and does not have the GRP shroud that gu
ides air down over the engine. I did find that my lower coolant hoses got v
ery hot and perished much faster than normal =93 I had to change them
at least every 2 years which is a real pain to do and to inspect. If you u
se the inlet close-out, just keep an eye on the lower hoses. I took my clos
e-outs off and shielded some of the rads. I plan to make an adjustable shut
ter for the rear of the radiator - one day!
Barry
G-XPXP 912 Taildragger UK 1000+hrs.
From: mjb777
Sent: Sunday, April 20, 2014 4:40 AM
Subject: Pulsar-List: Re: Rotax 912 and Carb ice?
Great info, and thanks everyone.
I think I have a plan now. Something along the lines of Ricky's exhaust, an
d will just stick with what works, the individual air filters on the Bings,
inside the cowling.
I think I'll have a good look at those UK water jacket extensions for the B
ings also unless anyone has had any bad experience with them?
Myron, do you have any pictures of your landing light cowl inlet modificati
ons?
It gets pretty cold and pretty warm in Oz, any temperature issues at all wi
th the smaller inlets?
Regards,
Matt.
--------
Pulsar 1 TD Kit.
Captain B777.
Licenced Aircraft Maintenance Engineer.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=422140#422140
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