<<When the carb temp came down to a few
degrees (C) above zero, carb ice was a definite possibility.>>
I thought ice was a possibility at any carb temp below 20C?
Have you experienced carb ice at carb body temps much above 0C too?
Duncan McF.
----- Original Message -----
From: "Terry Seaver (terrys)" <terrys@cisco.com>
Sent: Tuesday, September 05, 2006 5:32 PM
Subject: *** SPAM *** RE: Europa-List: Skydrive on/off control
> <terrys@cisco.com>
>
> Hi,
>
> We have a mono-wheel XS with 912S and have had the Skydrive carb heat
> since first flight, 5 years and 450 hours ago. At first we had the carb
> heat on all the time, but after a year or so installed the supplied
> water valve because of problems with hot starts in warm weather.
> Installing the valve (and turning off carb heat during the taxi back)
> cured our hot start problem.
> Once we had the valve installed, we were able to carefully measure
> time to climb as a check of any lost performance due to carb heat on vs
> off. There was no measurable difference in climb performance.
> Also, once we had the ability to fly with carb heat off, we found
> that we could get carb icing, on the ground and in the air, even on what
> seemed fairly moderate days. When the carb temp came down to a few
> degrees (C) above zero, carb ice was a definite possibility. Turning on
> the carb heat water cured the rough running in seconds.
> As others have mentioned, we mounted our carb heat water valve on top
> of the port side foot well, with relatively short water tubing runs to
> the valve, and ran a stiff wire through the firewall for control from
> the cockpit.
>
> Regards,
> Terry Seaver
>
>
> -----Original Message-----
> From: owner-europa-list-server@matronics.com
> [mailto:owner-europa-list-server@matronics.com] On Behalf Of Karl Heindl
> Sent: Sunday, September 03, 2006 4:09 AM
> To: europa-list@matronics.com
> Subject: Re: Europa-List: Skydrive on/off control
>
>
> Tim,
>
> That is what I thought, but it is actually not true.
> When on the ground, and you have a long taxi run, especially on a grass
> field and/or on a very hot day, the hot coolant will cause the fuel to
> boil in the carburator bowls. You can easily verify this by looking at
> the clear carb vent tube through the stbd cowling door, and you will see
> the fuel bubbling up into the airbox. You will not be able to start your
> engine at this stage as the carbs are flooded. I've proven it by putting
> a clamp on the coolant hose to stop circulation. The local Rotax agent
> educated me about the Skydrive. He also claims that because the added
> collar moves the carburator further from the engine, it contributes to
> vibration problems.
> And lastly, I don't believe that hot air and hot fuel going into the
> combustion, does not affect engine performance. You have a 914, so you
> wouldn't know.
>
> Best regards,
>
> karl
>
>
>>From: "Tim Ward" <ward.t@xtra.co.nz>
>>Reply-To: europa-list@matronics.com
>>To: <europa-list@matronics.com>
>>Subject: Re: Europa-List: Skydrive on/off control
>>Date: Sun, 3 Sep 2006 13:45:58 +1200
>>
>>
>>Karl,
>>Just keep the carb heat on all the time, no performance penalty. Having
>
>>a switch is just another thing to go wrong and fix!
>>Cheers,
>>Tim
>>Tim Ward
>>12 Waiwetu Street,
>>Fendalton,
>>Christchurch, 8052
>>New Zealand
>>
>>Ph +64 3 3515166
>>Mobile 021 0640221
>>ward.t@xtra.co.nz
>>----- Original Message ----- From: "Karl Heindl" <kheindl@msn.com>
>>To: <europa-list@matronics.com>
>>Sent: Sunday, September 03, 2006 12:20 PM
>>Subject: Europa-List: Skydrive on/off control
>>
>>
>>>
>>>
>>>
>>>Does anyone know of an inline valve, controlled electrically, for
>>>controlling the coolant flow in the Skydrive carb heater ?
>>>I know they exist for central heating systems, but are the wrong
> voltage.
>>>
>>>thanks in advance,
>>>
>>>Karl
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>
>>
>>
>>
>>
>>
>
>
>
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