Today's Message Index:
----------------------
1. 06:09 AM - Re: Re: Rotax 912 and Carb ice? (Myron Truex)
2. 08:05 AM - Re: Re: Rotax 912 and Carb ice? (Bernard Wilder)
3. 09:53 AM - Re: Re: Rotax 912 and Carb ice? (HUGH COULTER)
4. 11:05 AM - Re: Re: Rotax 912 and Carb ice? (barrynorman@comcast.net)
5. 02:58 PM - Re: Re: Rotax 912 and Carb ice? (Otto Souta)
6. 02:58 PM - Re: Re: Rotax 912 and Carb ice? (Sonja Englert)
Message 1
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| Subject: | Re: Rotax 912 and Carb ice? |
No pictures available at this time. They are packed. I built the enclosure
out of light tin and used small round fog lamps. During the heat of the
Sacramento valley I would remove them. We are talking 100+ degrees.
-----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 10:41 PM
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, 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
Message 2
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| Subject: | Re: Rotax 912 and Carb ice? |
I closed out my cowl openings at the time I was building.
Used the TLAR design principle.
Other than having to install an oil thermostat to keep oil temps high
enough, since first flight in Nov. of 2000, never have had any cooling
problems even in hot summers.
Bernie
On Sun, Apr 20, 2014 at 2:16 AM, Barry J Edwards <barry@connisbeare.com>wro
te:
> 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 guides air down over the engine. I did find that my lower
> coolant hoses got very 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 use the inlet close-out, just keep an eye on the lower
> hoses. I took my close-outs off and shielded some of the rads. I plan to
> make an adjustable shutter for the rear of the radiator - one day!
>
> Barry
> G-XPXP 912 Taildragger UK 1000+hrs.
>
> *From:* mjb777 <mattbrock777@gmail.com>
> *Sent:* Sunday, April 20, 2014 4:40 AM
> *To:* pulsar-list@matronics.com
> *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,
> 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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Message 3
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| Subject: | Re: Rotax 912 and Carb ice? |
I have Rickey's muffler and have had no icing problems.
Clarke
n Sat, 19 Apr 2014 13:17:45 -0700
"mjb777" <mattbrock777@gmail.com> wrote:
><mattbrock777@gmail.com>
>
> 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
>
>
>
>
>
>
>
>Un/Subscription,
>Forums!
>Admin.
>
>
>
Message 4
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| Subject: | Re: Rotax 912 and Carb ice? |
Matt,
I run a ram air system on my Pulsar III during the warmer months because it
does make a big difference in performance. My muffler set up is different
than the XP and resides under the engine. I use a modified Predator air box
that feeds cold air from an inlet off the side of the lower cowling toward
s the front of the plane. The pressure sensing tubes are attached to the ai
r box that feeds the carbs. I have temperature probes inside the airbox tha
t tend to read 5 degrees higher than OAT during flight. When I'm not using
the air box, the temp probes are located next to the carb air filters and t
hey read 50-60 degrees higher that OAT during flight. (This means the ram a
ir feeds much cooler air when being used) I remove it during colder months
due to the fear of icing even thought I have never experienced it. Bottom l
ine is, I get better than winter time performance in the summer with the ai
r box. Cruise speed is 5-8 MPH faster and climb 200-300 fpm better. In the
summer I cruise around 175 mph.
Be very careful how you set it up. If you do this to make sure flow is equa
lly distributed to both carbs and the sensing tubes are attached to the air
box. I used several sensors when I developed it including manifold pressur
e. Rotax does not recommend this due to liability issues unless you use the
ir airbox.
Barry
----- Original Message -----
From: "mjb777" <mattbrock777@gmail.com>
Sent: Saturday, April 19, 2014 5:03:18 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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===========
===========
Message 5
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| Subject: | Re: Rotax 912 and Carb ice? |
Hi Matt,
I see you have stirred up the carb icing issue. Since you mentioned your
other business is turbo engineering, why not stick the turbo in? That kills
the ice big way!
cheers
otto
On 20 April 2014 19:03, <barrynorman@comcast.net> wrote:
> Matt,
>
> I run a ram air system on my Pulsar III during the warmer months because
> it does make a big difference in performance. My muffler set up is
> different than the XP and resides under the engine. I use a modified
> Predator air box that feeds cold air from an inlet off the side of the
> lower cowling towards the front of the plane. The pressure sensing tubes
> are attached to the air box that feeds the carbs. I have temperature probes
> inside the airbox that tend to read 5 degrees higher than OAT during
> flight. When I'm not using the air box, the temp probes are located next to
> the carb air filters and they read 50-60 degrees higher that OAT during
> flight. (This means the ram air feeds much cooler air when being used) I
> remove it during colder months due to the fear of icing even thought I have
> never experienced it. Bottom line is, I get better than winter time
> performance in the summer with the air box. Cruise speed is 5-8 MPH faster
> and climb 200-300 fpm better. In the summer I cruise around 175 mph.
>
> Be very careful how you set it up. If you do this to make sure flow is
> equally distributed to both carbs and the sensing tubes are attached to the
> air box. I used several sensors when I developed it including manifold
> pressure. Rotax does not recommend this due to liability issues unless you
> use their airbox.
>
> Barry
>
>
> ------------------------------
> *From: *"mjb777" <mattbrock777@gmail.com>
> *To: *pulsar-list@matronics.com
> *Sent: *Saturday, April 19, 2014 5:03:18 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
>
>
> *
>
>
> *
>
>
Message 6
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| Subject: | Re: Rotax 912 and Carb ice? |
If I had a picture of the installation with Ricky's exhaust, I might
be able to comment on it.
Sonja
On 4/19/14, 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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