Not entirely true. G-JULZ has a cockpit heater based on the hot air behind
the radiators being ducted, via bulkhead shutoff valves, into the cockpit.
All PFA approved.
regards,
Mike
----- Original Message -----
From: "Richard Holder" <rholder@avnet.co.uk>
Sent: Friday, September 15, 2006 6:44 PM
Subject: Europa-List: Heat exchanger for the XS Europa
>
> Rob Housman wrote:
>
>> Perhaps I misunderstand what is being offered, but the
>> word exhaust suggests to me that this device would be
>> a heater muff added to the Rotax exhaust plumbing. If
>> so, why add the weight and risk of a carbon monoxide
>> sucking muff when there is already ample warm (hot?)
>> air available aft of the water and oil coolers?
>
>> What the Europa factory forgot was the necessary
>> ducting to get warmed air into the cockpit. Anyone
>> interested can contact me off list for the details of
>> how I ducted warm air from aft of the two coolers,
>> unheated air from the 914 turbo air inlet, and mixed
>> (or not, as desired) the two prior to being ducted into
>> the cockpit.
>
> Here in the UK any cabin air must be sourced from outside
> the cowling. Without any chance of under-cowling air
> getting in there.
>
> The rationale is that if there is an engine fire then any
> under-cowling air pick-up will pick up smoke and flames
> and these are undesirable inside the cockpit.
>
> Any heater/demist using an exhaust muff must have the muff
> fed from outside the cowling and then led through the
> firewall. And then the CAA/PFA will want some type of
> integrity test or a solid blanking off plate on the
> firewall also.
>
> The "warm air aft of the water & oil coolers" route would
> also have a problem if either radiator split and hot oil
> or water was streamed up your duct into the cockpit.
>
> A long shot but that's the way the CAA looks at things and
> it costs us dear :-(
>
> In the Land of the Free you are free to risk whatever you
> like as YOU have to sit in it. The CAA would like anyone
> who sits in the plane to be guaranteed safety :-) Ha ha !
>
> Just my two-penny worth.
>
> Richard
> G-OWWW
> High Cross
>
>
> --
>
>
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