Today's Message Index:
----------------------
0. 12:20 AM - List Fund Raiser (Matt Dralle)
1. 05:38 AM - Re: Re:Crossflow Subaru Engine (Ernest Christley)
2. 08:58 AM - Re: Re:Crossflow Subaru Engine (Hinde, Frank George (Corvallis))
3. 04:57 PM - Intercom Audio Ground (Carlos Trigo)
4. 06:32 PM - Re: Intercom Audio Ground (Robert McCallum)
5. 06:32 PM - Re: Intercom Audio Ground ()
Message 0
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | List Fund Raiser |
A couple of years ago I implemented an automatic "squelch button" of sorts for
the Fund Raiser messages. Here's how it works... As soon as a List member makes
a
Contribution through the Matronics Fund Raiser web site, he or she will instantly
cease to receive these Fund Raiser messages for the rest of the month! Its
just that simple. Don't you wish PBS worked that way! :-)
I really do appreciate each and every one of your individual Contributions to support
the Lists. It is your support that enables me to upgrade the hardware
and
software that are required to run a List Site like this. It also goes to pay for
the commercial-grade Internet connection and to pay the huge electric bill
to
keep the computer gear running and the air conditioner powered on. I run all of
the Matronics Email List and Forums sites here locally which allows me to
control and monitor every aspect of the system for the utmost in reliably and performance.
Your personal Contribution matters because, when combined with other Listers such
as yourself, it pays the bills to keep this site up and running. I accept
exactly ZERO advertising dollars for the Matronics Lists sites. I can't stand
the pop-up ads and all other commercials that are so prevalent on the Internet
these days and I particularly don't want to have it on my Email List sites.
If you appreciate the ad-free, grass-roots, down-home feel of the Matronics Email
Lists, please make a Contribution to keep it that way!!
http://www.matronics.com/contribution
Thank you!
Matt Dralle
Matronics Email List Administrator
[Note that there are certain circumstances where you might still see a Contribution
related message. For example, if someone replies to one of the messages,
when using the List Browse feature, or when accessing List message via the Forum.
The system keys on the given email address and since most of these are
anonymous public access methods, there is no simple way to filter them.]
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re:Crossflow Subaru Engine |
Jerry2DT@aol.com wrote:
>
> The idea that these are "plug and play" and can just be popped into
> your airframe like a Lyco is false,
The idea that a Lyco is "plug and play" and can just be popped into your
airframe is false also. A proper Lyco installation requires no less
engineering than an auto installation. What is different is that
usually all the engineering has already been done by the plane's
designer. It is not at all uncommon to here of engine problems in a new
airplane design. Those problems are generally dismissed with a "Yeah,
we know how to handle that" or "That's just the way Lycomings are."
(Oil seeping cases anyone?)
It boils down to the simple fact that using an alternative engine means
that you are working on an alternative airplane design. You can't pull
just one string of a spider's web. For planes that are designed for an
alternative engine*, just popping in a Lyco would be the difficult choice.
*If it is designed for an alternative engine, wouldn't that make the
Lyco the alternative?
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re:Crossflow Subaru Engine |
I havent replied to this thread but having built both a Lycoming and a soob powered
airplanes here are my thoughts.
As others have said be prepared to do some engineering with an auto conversion.
The problem is not normally with the engine itself, its if the engine has been
"rebuilt" and the ancillery components like the gearbox have a lot less development
hours than the engine itself.
As an installation is only as strong as the weakest link then it is not unusual
to find some issues...
Fuel consumption for the same amount of power are really not much different between
a Lyc and a soob...Now a Lyc with fuel injection can be run LOP which improves
the BSFC by quite a bit. I don't honestly know if automotive FI systems
have this option.
One thing not mentioned below is cooling drag. This is a hotly debated issue. In
a slow airplane its probably not going to make any difference, but in a fast
airplane the cooling drag is a significant part of the overall drag. A radiator
has a lower temp than a cylinder head. This translates into more cooling flow
required for the same amount of horsepower rejected.
I have seen a few RV's with water cooled engines that have larger exits scoops
for this very reason...How much does this translate into increased fuel flow to
fly at the same speed as an air cooled motor has yet to be determined.
I think the old wives tale about "lycomings need 100LL" is now long dead and buried..a
lot of them are run on mogas and mine is now run on 10% ethanol without
a problem. I too will avoid 100LL if I can.
The big advantage as far as I can see for an automotive install is the rebuild
cost will be considerably lower than a lyc.
Frank
Rv7a IO360..330 hours
Zenair zodiac Ea 81 soob..4000 hours
Do not archive
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Ken
Sent: Tuesday, November 04, 2008 2:46 PM
Subject: Re: AeroElectric-List: Re:Crossflow Subaru Engine
Which is all mostly true but mostly surmountable with effort.
My one off 2.2 liter subaru with dual multi port EFI and electrical systems comes
in at about the same weight as an 0-320. The mission weight with fuel for the
same range is arguably quite a bit less. SFC's are similar to a Lyc running
LOP but I happily cruise at very low power (just over 4 gph) with no fouling,
temperature, or mixture issues. Yet it seems to match a fixed pitch 0-320 for
take off and climb performance. All with an economical Warp Drive prop. I cruise
slow but I usually catch up to my buddies (same aircraft types) by the time
they've finished refueling. At the end of the day I've burnt about half the
fuel quantity and it is cheaper mogas. I don't participate in the "how hot is
your engine" conversations, and I'm there in time for the first beer ;)
My only issue has been the gearbox which in my case is indeed heavy and expensive.
But so far I'm happy with the second one. Conversions are over hyped and definitely
not for everyone but they can be absolutely wonderful for some applications
like mine. 0-320 STOL performance, the advantages of EFI, rotax 912 fuel
consumption in cruise, hassle free winter flying, etc.
Downside includes: I'm on my own if anything needs repair. Since I avoid leaded
fuel, it is sometimes less convenient obtaining mogas on long trips. (Long means
more than 7 hours in my case). It is getting harder to avoid alcohol but I
will burn it in preference to 100LL as long as it is consumed within about 24
hours.
Ken
(I promise not to say any more on this list)
Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Intercom Audio Ground |
Hi there fowkes
I am installing my Flightcom 403 intercom and I have a problem to solve.
I need to connect several (4 or 5) audio ground wires that come from the
pilot and co-pilot mic and headset jacks to a single pin in the D-Sub 25-pin
connector.
Can somebody please indicate me the best technique to do it?
Carlos
Message 4
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Intercom Audio Ground |
Carlos;
This has been covered in the archives , but try techniques similar to
these illustrated on Bob's web site.
http://aeroelectric.com/articles/pigtail/pigtail.html or the
"practical example" at the bottom of this page;
http://aeroelectric.com/articles/multiplewires/multiplewires.html One of
these should work for you.
Bob McC
----- Original Message -----
From: Carlos Trigo
To: aeroelectric-list@matronics.com
Sent: Wednesday, November 05, 2008 7:55 PM
Subject: AeroElectric-List: Intercom Audio Ground
Hi there fowkes
I am installing my Flightcom 403 intercom and I have a problem to
solve.
I need to connect several (4 or 5) audio ground wires that come from
the pilot and co-pilot mic and headset jacks to a single pin in the
D-Sub 25-pin connector.
Can somebody please indicate me the best technique to do it?
Carlos
Message 5
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Intercom Audio Ground |
Carlos
Solder the 4-5 wires together with one extra wire and heat
shrink the solder joint bundle. Take the one extra wire and put that into
the D-sub connector.
Neil
_____
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Carlos
Trigo
Sent: Wednesday, November 05, 2008 7:55 PM
Subject: AeroElectric-List: Intercom Audio Ground
Hi there fowkes
I am installing my Flightcom 403 intercom and I have a problem to solve.
I need to connect several (4 or 5) audio ground wires that come from the
pilot and co-pilot mic and headset jacks to a single pin in the D-Sub 25-pin
connector.
Can somebody please indicate me the best technique to do it?
Carlos
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|