---------------------------------------------------------- Lightning-List Digest Archive --- Total Messages Posted Wed 03/25/09: 10 ---------------------------------------------------------- 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 _____________________________________ Time: 05:44:04 AM PST US From: "flylightning" Subject: RE: Lightning-List: 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 _____________________________________ Time: 05:52:57 AM PST US From: N1BZRich@aol.com Subject: Lightning-List: 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 _____________________________________ Time: 06:24:38 AM PST US From: "Pete Krotje" Subject: RE: Lightning-List: 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 _____________________________________ Time: 08:47:39 AM PST US Subject: Re: Lightning-List: Electronic Cabin Heat Vent From: Jim Langley It will hang on the vent all day... On Wed, Mar 25, 2009 at 8:43 AM, flylightning wrote : > Nice=85digital when you need fast precise cabin heat vent > operation=85=85question is will it 3D? > > ________________________________ Message 5 _____________________________________ Time: 09:58:05 AM PST US From: "flylightning" Subject: RE: Lightning-List: 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 wrote: Nice.digital when you need fast precise cabin heat vent operation..question is will it 3D? ________________________________ Message 6 _____________________________________ Time: 01:20:21 PM PST US From: Charles Dewey 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 wrote: > From: flylightning > Subject: RE: Lightning-List: Electronic Cabin Heat Vent > To: lightning-list@matronics.com > Date: Wednesday, March 25, 2009, 12:50 PM > > > > > > > > > > > > > > > > > > > > > > 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 > > 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 > wrote: > > > > > > Nicedigital when you > need fast precise cabin heat vent > operationquestion is will it > 3D? > > > > > > > > > > > > http://www.matronics.com/Navigator?Lightning-Listhttp://forums.matronics.comhttp://www.matronics.com/contribution > > > > > > > > > > > ________________________________ Message 7 _____________________________________ Time: 02:14:01 PM PST US From: "Mark Stauffer" Subject: RE: Lightning-List: 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 wrote: > From: flylightning > Subject: RE: Lightning-List: Electronic Cabin Heat Vent > To: lightning-list@matronics.com > Date: Wednesday, March 25, 2009, 12:50 PM > > > > > > > > > > > > > > > > > > > > > > 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 > > 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 > wrote: > > > > > > Nicedigital when you > need fast precise cabin heat vent > operationquestion is will it > 3D? > > > > > > > > > > > > http://www.matronics.com/Navigator?Lightning-Listhttp://forums.matronics.comhttp://www.matronics.com/contribution > > > > > > > > > > > ________________________________ Message 8 _____________________________________ Time: 02:41:28 PM PST US Subject: Lightning-List: Re: Electronic Cabin Heat Vent From: "selwyn" 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 _____________________________________ Time: 04:04:55 PM PST US From: "Jim Langley" Subject: RE: Lightning-List: 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 ____________________________________ Time: 07:03:06 PM PST US From: N1BZRich@AOL.COM Subject: Re: Lightning-List: 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. 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