Today's Message Index:
----------------------
1. 05:44 AM - Re: Electronic Cabin Heat Vent (flylightning)
2. 05:52 AM - Flight to Tennessee w/ some manifold pressures (N1BZRich@aol.com)
3. 06:24 AM - Re: Re: more prop test info (Pete Krotje)
4. 08:47 AM - Re: Electronic Cabin Heat Vent (Jim Langley)
5. 09:58 AM - Re: Electronic Cabin Heat Vent (flylightning)
6. 01:20 PM - Re: To Nick // Paperwork Austin at Royal Aviation Needs (Charles Dewey)
7. 02:14 PM - Re: To Nick // Paperwork Austin at Royal Aviation Needs (Mark Stauffer)
8. 02:41 PM - Re: Electronic Cabin Heat Vent (selwyn)
9. 04:04 PM - Re: Re: Electronic Cabin Heat Vent (Jim Langley)
10. 07:03 PM - Re: Re: more prop test info (N1BZRich@AOL.COM)
Message 1
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Subject: | Electronic Cabin Heat Vent |
Nice.digital when you need fast precise cabin heat vent operation..question
is will it 3D?
Good idea I like it.
nick
_____
From: owner-lightning-list-server@matronics.com
[mailto:owner-lightning-list-server@matronics.com] On Behalf Of Jim Langley
Sent: Tuesday, March 24, 2009 8:53 PM
Subject: Lightning-List: Electronic Cabin Heat Vent
Here's a little tidbit that I know Nick can relate to because he's a fellow
RC'r.
Instead of using the cable to control the vent for my cabin heat, I am using
a 12v-5v regulator, servo tester and Hitec Digital servo.
The servo will be mounted on the firewall, connected to the vent with a
Hangar 9 titanium control link. The servo is a standard RC digital servo
that came out of one of my big rc airplanes and has about 180lbs of torque.
This is what I had handy, although a 60-80lb servo would work fine. I built
the voltage regulator from parts and the following plans,
http://www.mybitbox.com/articles/standalone-voltage-regulator/
I also built a simple servo tester which is not much more than a 555IC, and
some cheap parts from Radio Shack with a pot to control the servo travel.
The servo will move throughout its range as fast as you turn the dial, so
you can open or close the vent pretty fast. I will be mounting the servo
tester, (heat control like on a car dash), on my center console along with
my master/EFIS switch and my flap position selector; (see my crude drawing).
The nice thing about the Hitec servos is that they are pretty robust when it
comes to heat, and are programmable for arm travel.
All in all, $59.00 for the servo and $12.00 for the rest of the parts, plus
some solder time = total of $71.00 for a digitally actuated heater vent! If
you want to go cheaper, use a HS-75BB with 100lbs of torque. It is used a
lot for robotics and only costs $29.00!
http://www.servocity.com/html/hs-75bb_retract.html What I used is over
kill, but was lying around and not being used.
I will write up something with pictures after it is installed.
Jim!
Message 2
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Subject: | Flight to Tennessee w/ some manifold pressures |
All,
Good flight to SYI yesterday morning. Almost no clouds in the sky until
approaching Shelbyville then widely scattered. Winds and "bumpy" air were
another story. I actually had a tail wind for about the first 1/3 of the trip
(it varied between 6 to 10 knots on the tail), but then went away as I got
into the foothills of Virginia. By the time I got to the mountains and had to
climb from 4,500 to 6,500 and then to 8,500 the wind became a head wind and
the "bumps" started, eventually you could feel them all the way up to 8,500.
Head wind from about 50 miles east of Bristol all the way to SYI varied
between 10 to 18 on the nose.
In order to get some manifold pressure data for Selwyn and Bob, I wrote
those numbers down for the altitudes and fuel management technique I was
using. Here are the results:
At 2,000 MSL I set fuel flow at 6.0 GPH which resulted in 2850 RPM, 161 TAS
in MPH, and a MP of 22.4
At 3,000 MSL, with fuel flow set at 6.0 GPH, RPM was 2860, TAS in MPH was
161, and MP was 22.2
At 4,000 MSL, with fuel flow set at 6.0 GPH, RPM was 2870, TAS in MPH was
162, and MP was 21.8
At 4,500 MSL, with fuel flow set at 6.0 GPH, RPM was 2880, TAS in MPH was
161, and MP was 21.4
At 6,500 MSL, with fuel flow set at 6.0 GPH, RPM was 2890, TAS in MPH was
162, and MP was 20.2
At 8,500 MSL, with fuel flow set at 6.0 GPH, RPM was 2920, TAS in MPH was
162, and MP was 19.2
NOTE: TAS while at 8,500 was initially 162, but climbed to 165 as fuel was
burned off.
Based on distance flown and total elapsed time from pulling onto the
runway to turning off the runway at SYI, the speed across the ground was 157.67
mph (of course this includes all climbs and descent). And remember, I had
some tail wind and some head wind. Also, my climb technique is to use a
cruise climb of about 120 mph. Total time spend in climbs today was not too bad
because the longest sustained climb was only 2000'. My descent technique is
to start down far enough out so that I can get a 500'/min rate with at least
the same speed. I keep pulling the power pulled back and even slow down if
the bumps that I am flying in get too uncomfortable. I think the average speed
of about 158 from on the runway to off the runway is pretty good. Fuel flow
for the flight, based on how many gallons I added at SYI, worked out to be
5.8 GPH which is pretty much what I expected. I have my fuel flow system set
slightly conservative, so when I am showing 6 GPH, I am really burning
slightly less. I like it that way. On shutdown, I still had about an hour and
twenty minutes of flying time left if I kept the power the same. Much longer
if I wanted to reduce power.
Some of the new LS-1 parts are back from the paint shop and it is
looking good. Also, Pat and Carl are here and their jet really looks good based
on
the colors they chose. I will be finishing up the newsletter while here and
will try to get some photos of both of these new Lightnings. I flew one
test flight in the demo yesterday afternoon to gather ASTM data for the SLSA
paperwork. Nick had done an incredible job of putting together the overall test
plan to show compliance for the ASTM certification. He has every small
detail written out as to the data required and the compliance methods. I just
hope the weather cooperates. Right now SYI is IFR with low clouds and mist.
Bummer.
Blue Skies,
Buz
**************Feeling the pinch at the grocery store? Make dinner for $10 or
less. (http://food.aol.com/frugal-feasts?ncid=emlcntusfood00000001)
Message 3
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Subject: | Re: more prop test info |
We have not used an in flight adjustable prop but many times have set and
adjusted Sensenich Ground Adjustable props. The more pitch that we put in
it the richer the resulting mixture. Don't forget that the vacuum at the
top of the diaphragm is generated upstream from the throttle butterfly. The
more open the butterfly (throttle) the more vacuum the top side of the
diaphragm will see and the higher the needle will ride causing a richer
mixture. Two of the other four forces that affect mixture are more directly
related to airflow through the carb. The other two are related to
atmospheric pressure at the carb.
Pete
-----Original Message-----
From: owner-lightning-list-server@matronics.com
[mailto:owner-lightning-list-server@matronics.com] On Behalf Of selwyn
Sent: Tuesday, March 24, 2009 7:23 PM
Subject: Lightning-List: Re: more prop test info
pete(at)flylightning.net wrote:
> Actually Selwyn, more prop pitch will result in a richer mixture not
leaner.
>
> Pete
>
> --
Hi Pete,
Sorry, I don't follow that one.
My understanding is that what will set the mixture is a combination of
throttle opening and engine revs. Engine revs is the critical thing because
it affects the flow through the carby and thence the needle position which
is what regulates the mixture. The profile of the needle has to match the
operating rev band.
>From that, if you imagine an engine with a variable pitch prop and you run
it with a wide open throttle and the thing is running somewhere near max
revs, the needle will be right out and it will be running rich mixture with
most of the needle profiles we are likely to use. If we then start winding
in pitch the revs will come back as we load the engine and somewhere a
little under 3000 RPM the mixture will start to lean off as the flow through
the carby throat decreases and the needle begins to descend. If we keep
winding in pitch we will end up at 2850 cruise revs, wide open throttle and
a nice lean cruise mixture, high manifold pressure, probably good cruise
performance but an engine waiting to go bang.
That's my theory of how the Bing works. I would be very pleased to see
debate from the experts.
--------
Cheers, Selwyn
Kit 66
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=236039#236039
Message 4
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Subject: | Re: Electronic Cabin Heat Vent |
It will hang on the vent all day...
On Wed, Mar 25, 2009 at 8:43 AM, flylightning <info@flylightning.net> wrote
:
> Nice=85digital when you need fast precise cabin heat vent
> operation=85=85question is will it 3D?
>
>
Message 5
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Subject: | Electronic Cabin Heat Vent |
Nice!
_____
From: owner-lightning-list-server@matronics.com
[mailto:owner-lightning-list-server@matronics.com] On Behalf Of Jim Langley
Sent: Wednesday, March 25, 2009 10:45 AM
Subject: Re: Lightning-List: Electronic Cabin Heat Vent
It will hang on the vent all day...
On Wed, Mar 25, 2009 at 8:43 AM, flylightning <info@flylightning.net> wrote:
Nice.digital when you need fast precise cabin heat vent operation..question
is will it 3D?
Message 6
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Subject: | To Nick // Paperwork Austin at Royal Aviation Needs |
Nick, Austin at Royal Aviation in Hagerstown needs the installation instructions
for aileron trim tab modification. He already had the instructions for installation
in the elevator (the ones you forwarded to him on Tuesday). Charles
Dewey
--- On Wed, 3/25/09, flylightning <info@flylightning.net> wrote:
> From: flylightning <info@flylightning.net>
> Subject: RE: Lightning-List: Electronic Cabin Heat Vent
> To: lightning-list@matronics.com
> Date: Wednesday, March 25, 2009, 12:50 PM
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> From:
> owner-lightning-list-server@matronics.com
> [mailto:owner-lightning-list-server@matronics.com] On Behalf Of Jim Langley
>
> Sent:
> Wednesday, March 25, 2009
> 10:45 AM
>
> To:
> lightning-list@matronics.com
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> Subject: Re:
> Lightning-List:
> Electronic Cabin Heat Vent
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> It
> will hang on the vent
> all day...
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> On Wed, Mar 25, 2009 at 8:43 AM,
> flylightning <info@flylightning.net>
> wrote:
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> Nicedigital when you
> need fast precise cabin heat vent
> operationquestion is will it
> 3D?
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> http://www.matronics.com/Navigator?Lightning-Listhttp://forums.matronics.comhttp://www.matronics.com/contribution
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Message 7
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Subject: | To Nick // Paperwork Austin at Royal Aviation Needs |
Charles,
This may be better served with a personal e-mail to Nick. Just a thought.
Mark
-----Original Message-----
From: owner-lightning-list-server@matronics.com
[mailto:owner-lightning-list-server@matronics.com]On Behalf Of Charles
Dewey
Sent: Wednesday, March 25, 2009 3:15 PM
Subject: RE: Lightning-List: To Nick // Paperwork Austin at Royal
Aviation Needs
Nick, Austin at Royal Aviation in Hagerstown needs the installation instructions
for aileron trim tab modification. He already had the instructions for installation
in the elevator (the ones you forwarded to him on Tuesday). Charles
Dewey
--- On Wed, 3/25/09, flylightning <info@flylightning.net> wrote:
> From: flylightning <info@flylightning.net>
> Subject: RE: Lightning-List: Electronic Cabin Heat Vent
> To: lightning-list@matronics.com
> Date: Wednesday, March 25, 2009, 12:50 PM
>
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> From:
> owner-lightning-list-server@matronics.com
> [mailto:owner-lightning-list-server@matronics.com] On Behalf Of Jim Langley
>
> Sent:
> Wednesday, March 25, 2009
> 10:45 AM
>
> To:
> lightning-list@matronics.com
>
> Subject: Re:
> Lightning-List:
> Electronic Cabin Heat Vent
>
>
>
>
>
> It
> will hang on the vent
> all day...
>
>
>
> On Wed, Mar 25, 2009 at 8:43 AM,
> flylightning <info@flylightning.net>
> wrote:
>
>
>
>
>
> Nicedigital when you
> need fast precise cabin heat vent
> operationquestion is will it
> 3D?
>
>
>
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>
> http://www.matronics.com/Navigator?Lightning-Listhttp://forums.matronics.comhttp://www.matronics.com/contribution
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Message 8
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Subject: | Re: Electronic Cabin Heat Vent |
Neat idea Jim.
I notice you have a rotary flap selector drawn in as well which implies some sort
of servo control for the flap motor. What are you using there?
--------
Cheers, Selwyn
Kit 66
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=236143#236143
Message 9
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Subject: | Re: Electronic Cabin Heat Vent |
I don't have it installed yet, but I will be using a rotary selector switch
like that used on the Flight Design CT, and my MGL I/O extender will control
the flaps.
-----Original Message-----
From: owner-lightning-list-server@matronics.com
[mailto:owner-lightning-list-server@matronics.com] On Behalf Of selwyn
Sent: Wednesday, March 25, 2009 5:37 PM
Subject: Lightning-List: Re: Electronic Cabin Heat Vent
Neat idea Jim.
I notice you have a rotary flap selector drawn in as well which implies
some sort of servo control for the flap motor. What are you using there?
--------
Cheers, Selwyn
Kit 66
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=236143#236143
Message 10
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Subject: | Re: more prop test info |
In a message dated 3/24/2009 11:55:16 A.M. Eastern Daylight Time,
jeynon2@verizon.net writes:
So Buz, if my interpolation skills are up to par, you could shut off your
fuel altogether and cruise all day at 100 mph.
Absolutely brilliant, John. I wish I had thought of that. Sure would lower
the cost of flying.
Buz
**************Feeling the pinch at the grocery store? Make dinner for $10 or
less. (http://food.aol.com/frugal-feasts?ncid=emlcntusfood00000001)
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