Hello
I am sure this will help the original poster with his problem on a 912 with no carb heat and his test by the English FAA
I am sure an answer of "Fit carb heat at my next available opportunity" will get him full marks
I think he was more after "Open throttle to increase manifold pressure and descend if possible"
Peter
From: apollonorthamerica <apollonorthamerica@yahoo.com>
To: Sport_Aircraft@yahoogroups.com
Sent: Monday, December 26, 2011 2:56 PM
Subject: Re: Light-Sport Aircraft Yahoo group Is there any carb-icing proceedure for the Rotax 912?
This is the always-on carb heat system that uses the hot coolant from inside the engine and makes it go only around the butterfly area of the carb keeping it above 32 degrees F
http://www.skydrive.co.uk/proddetail.asp?prod=CH%2D912%2D3
Since it does not heat up the incoming air, there is no roughness and the power loss is negligible.
In this case you absolutely do not want to lower RPM because that will make the hot coolant, well coolar and remove its effectiveness in heating the carb butterfly.
Abid
--- In Sport_Aircraft@yahoogroups.com, Helen Woods <Helen_Woods@...> wrote:
>
> http://www.kodiakbs.com/engines/images/912s1.JPG
> This set up uses cold external air and is hence prone to ice and has a
> manual knob.
>
> http://www.lightsportaircraft.ca/puma-aircraftreview/images/rotax912engineinstallation.jpg
> This set up has the heat "always on" as is takes the air from the warm
> and toasty area under the cowling.
>
> On 12/25/2011 6:16 PM, circicirci wrote:
> > As you know, with the exception of some of a few flying 912s in the UK and other places who have custom-installed some sort of carb heat on their Rotax, our 912's have no carb heat.
> >
> > Although it appears that there rarely is carb-icing, it IS possible. And anyway I believe my flight examiner may want me to state what the symptoms are (I do know those) and what the proceedure for dealing with it is.
> >
> > Of course in most piston aircraft engines like the Lycomasaurus, the primary response is supposed to be "turn on carb heat."
> >
> > But is there ANYthing one could do on a Rotax that has no carb heat if detecting symptoms of carb icing (other than pray?).
> >
> > Might "descend to lower warmer altitude if available" be appropriate?
> > Or?
> > Possibly cut back power (if practical/safe?) as that might reduce the rate of cooling due to expanding air flow in the carb intake?
> >
> > Or?
> >
> > Alex
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > ------------------------------------
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
>
http://www.skydrive.co.uk/proddetail.asp?prod=CH%2D912%2D3
Since it does not heat up the incoming air, there is no roughness and the power loss is negligible.
In this case you absolutely do not want to lower RPM because that will make the hot coolant, well coolar and remove its effectiveness in heating the carb butterfly.
Abid
--- In Sport_Aircraft@yahoogroups.com, Helen Woods <Helen_Woods@...> wrote:
>
> http://www.kodiakbs.com/engines/images/912s1.JPG
> This set up uses cold external air and is hence prone to ice and has a
> manual knob.
>
> http://www.lightsportaircraft.ca/puma-aircraftreview/images/rotax912engineinstallation.jpg
> This set up has the heat "always on" as is takes the air from the warm
> and toasty area under the cowling.
>
> On 12/25/2011 6:16 PM, circicirci wrote:
> > As you know, with the exception of some of a few flying 912s in the UK and other places who have custom-installed some sort of carb heat on their Rotax, our 912's have no carb heat.
> >
> > Although it appears that there rarely is carb-icing, it IS possible. And anyway I believe my flight examiner may want me to state what the symptoms are (I do know those) and what the proceedure for dealing with it is.
> >
> > Of course in most piston aircraft engines like the Lycomasaurus, the primary response is supposed to be "turn on carb heat."
> >
> > But is there ANYthing one could do on a Rotax that has no carb heat if detecting symptoms of carb icing (other than pray?).
> >
> > Might "descend to lower warmer altitude if available" be appropriate?
> > Or?
> > Possibly cut back power (if practical/safe?) as that might reduce the rate of cooling due to expanding air flow in the carb intake?
> >
> > Or?
> >
> > Alex
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > ------------------------------------
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
>
__._,_.___
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