installation? I grew up with a VW Beetle and can remember the smell of
exhaust well. Certainly wouldn't want CO^2 pulled into the cabin while
flying.
Randy
-----Original Message-----
From: Titanaircraft@yahoogroups.com [mailto:Titanaircraft@yahoogroups.com]
On Behalf Of David
Sent: Tuesday, October 20, 2009 8:57 AM
To: Titanaircraft@yahoogroups.com
Subject: [Titanaircraft] Re: Winter cockpit heater
Hello fellas, im new and have been lurking for a few weeks. after seeing
your post about coolant and oil heaters, the obvious question came to
me...forgive this newbie conceptualization here , but the would it not be as
effective to run a heat transfer type system around one of the exhaust
headers from the bottom and into the cockpit? I mean a system like this
gets heat from a non regulated source and bypasses the need for controls
other than a sort of flue vent of sorts. havent others been using these on
other titan airtcraft as well? :)
David Shirar
--- In Titanaircraft@yahoogroups.com, Jeff Lewis <jlewis22@...> wrote:
>
> Hi Peter, Thank you for taking the time to submit all this great info. I
am in the middle of creating a heating unit for a Rans S-12. Your ideas are
helpful.
>
> Jeff Lewis
> jlewis22@...
> Kennewick Wa
>
>
>
>
> ________________________________
> From: lwoods102 <lwoods102@...>
> To: Titanaircraft@yahoogroups.com
> Sent: Monday, October 19, 2009 4:48:12 PM
> Subject: [Titanaircraft] Re: Winter cockpit heater
>
>
>
> Hi Peter:
>
> Good ideas and thanks for the URL. I had a good, long look at it and
appreciate the reference.
> I came away with good ideas that I will try out.
>
> Best,
> Larry
> --- In Titanaircraft@ yahoogroups. com, "Peter" <pcowan41@ .> wrote:
> >
> >
> > Larry If you look at the Napa 140/BMW thermostat,( see picture in:
http://www.pipcom. com/~cowcam/ ransheat. htm )
> > it accomplishes everything you want in one unit. First it is a bypass
thermostat to handle quick warm up at full flow. With it in the system you
can simply plumb the 5/8 rad across the main lines between the bmw
thermostat and the engine.
> > Yes in one installation I did put in a restricter valve to force more
flow thru the cabin rad but you may find that unnecessary as long as the
overall coolant temp is kept high by the thermostat. In my curent
installation there is no restricter valve and it works fine.
> > One difference between us is that you would have a much longer run to
your cabin heater rad than I do and this may be preventing enough coolant to
flow thru the cabin heater. Is this the case?
> > P
> >
> > -
> > >
> > > The Tornado I work on employs a 582. The 582 has 1 inch diameter
inlets/outlets, as do its rad(s). ROtax wants fairly large volume
circulation and doesn't want the water pump flow restricted in any
consequential way (at least that is what they told me), which means that I
had to try to find a heater core with similar sized inlets/outlets.
> >
> > Why so? Isn't the heater core in parallel with the existing rad?
> >
> > I was not able to find any that were of reasonable size or weight so
settled on one with 5/8ths inch diameter inlets/outlets. To meet the flow
volume requirements, I decided to employ a three way "diverter valve", which
is adjustable via a cable.
> > >
> > > The plumbing is fairly simple.... I put a Tee in the hose leaving the
head (hot coolant) with the diverter valve on one side (to heater) and the
other side plumbed to the rad inlet. From the tee, I necked down to 5/8th
inch hose and plumbed to the heater. Like you, I have an additional tee in
the coolant return circuit just upstream from the water pump entry. This tee
provides coolant returning from the heater with access back into the primary
circuit.
> > >
> > > In operation, the coolant warms up quickly (via the bypass circuit and
its thermostat)irrespec tive of valve setting. Once the bypass thermostat
opens up (drop in coolant temp), I open the valve which allows some hot
coolant to flow to the heater. It doesn't take much practice to quickly get
to know where the valve should be set to keep the engine temps at an
appropriate (elevated) temperature. With this setup, I can adjust flows so
that the coolant temperature is close to the upper temperature limits of the
engine, which is best for both the engine and the pilot. (g).
> > >
> > > I really like the diverter valve. It will maintain a constant flow
irrespective of the valve setting if all involved hoses are of the same
diameter. Of course using different sized hoses interferes with this
capability to some extent.
> > >
> > > This year, I intend to find an "inline" thermostat housing that I will
fit in the primary circuit. A high temp thermostat located therein will open
in the presence of excessive engine coolant temperature and open to feed
coolant to the engine .
> > >
> > >
> > >
> > > Best,
> > > Larry
> > >
> > >
> > >
> > > --- In Titanaircraft@ yahoogroups. com, "Peter" <pcowan41@> wrote:
> > > >
> > > > Larry are you referring to the need for thermostats? I'd be
interested in hearing your comments on the issues.
> > > >
> > > > I fly with both an oil and a coolant thermostat and wouldn't be
without them.
> > > > The coolant thermostat is a BMW bypass unit from NAPA for about $40
(available in the US only it seems).It has 1 1/4" holes so necking down is
required but it works just fine.
> > > > The oil is a Permacool modified by machining the seat to remove the
notches which allow oil to bypass the cooler when the unit is hot. You don't
want any oil bypassing the cooler when hot. Without this mod you get hotter
temps in summer. The permacool also takes a standard auto thermostat wax
stat so it is easy to increase it from the standard 171 to over 190.
> > > > I just cut in a T into both the coolant lines running to and from
the rad and put the cabin heater core and a valve between the T's. I also
have an outside air inlet ducted to the heater core. The coolant thermostat
takes care of keeping the temp up.
> > > > Peter
> > > >
> > > > --- In Titanaircraft@ yahoogroups. com, "lwoods102" <lwoods102@>
wrote:
> > > > >
> > > > > Last year, I spent far too much time developing a cockpit heater
system for the Tornado, but the result works well and is not expensive. This
winter, I will add one more improvement (which will keep the engine coolant
temp where it belongs without the pilot having to adjust it manually).
> > > > >
> > > > > What looks like a simple job (simply syphoning off some of the hot
coolant to the heater), is anything but. There are several things that have
to be taken into consideration, especially if you want the engine to operate
at factory-recommended temperatures.
> > > > >
> > > > > Best,
> > > > > Larry
> > > > >
> > > >
> > >
> >
>
>
>
>
> [Non-text portions of this message have been removed]
>
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