Kolb-List Digest Archive

Wed 01/07/09


Total Messages Posted: 13



Today's Message Index:
----------------------
 
     1. 05:19 AM - Re: Building a trailer/maybe some ideas... (Thom Riddle)
     2. 06:28 AM - Re: ! Re: Landing video Kolb MK III (Richard & Martha Neilsen)
     3. 06:39 AM - Re: More flying videos (grantr)
     4. 07:10 AM - Re: C90 Brakes (Richard & Martha Neilsen)
     5. 07:34 AM - Brake basics (Mike Welch)
     6. 08:50 AM - Re: Monument Vallley - Gouldings Campground (The Kuffels)
     7. 12:01 PM - Re: Brake basics ()
     8. 12:33 PM - Dynamic Air Pressure Filter Housing (Jack B. Hart)
     9. 02:26 PM - Re: Dynamic Air Pressure Filter Housing (Dana Hague)
    10. 06:08 PM - Re: Dynamic Air Pressure Filter Housing (Richard & Martha Neilsen)
    11. 06:21 PM - Re: Dynamic Air Pressure Filter Housing (Jack B. Hart)
    12. 06:51 PM - Re: Dynamic Air Pressure Filter Housing (Dana Hague)
    13. 07:06 PM - Re: Dynamic Air Pressure Filter Housing (Jack B. Hart)
 
 
 


Message 1


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    Time: 05:19:16 AM PST US
    Subject: Re: Building a trailer/maybe some ideas...
    From: "Thom Riddle" <riddletr@gmail.com>
    If you trailer fans want one but don't want to build one, mine is for sale, and can be seen at http://riddletr.googlepages.com/flylite%2Cinc.2 Scroll down to the photo and click on the TEXT header above the photo. I'm in a generous mood so you might get it pretty cheap. Make an offer. -------- Thom Riddle N1208P RANS S6S, Tailwheel, 912UL N197BG FS1/447 -------------------- It is by universal misunderstanding that all agree. For if, by ill luck, people understood each other, they would never agree. - Charles Baudelaire Read this topic online here: http://forums.matronics.com/viewtopic.php?p=223307#223307


    Message 2


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    Time: 06:28:42 AM PST US
    From: "Richard & Martha Neilsen" <NeilsenRM@comcast.net>
    Subject: Re: ! Re: Landing video Kolb MK III
    Bill I'm not getting any younger either. I can still hear fairly well and use the headphones to keep my hearing. Yes the headphones are only plugged into my intercom. The sigtronics speakers are also plugged in with the Sony headphones plugged into the passenger port. I use a headphone to mp3 adapter and a one into two splitter (both from Radio Shack) so that my passengers can use a set of Sony headphones under their headphones. I have modified the Sony headsets. I scored the plastic handle/stem and broke it off to make the Sigtronics headsets fit better. I purchased one Sony headset at Target and one online. They make two or three models and I have the cheapest and they work super. Rick Neilsen Redrive VW powered MKIIIC ----- Original Message ----- From: WhiskeyVictor36@aol.com To: kolb-list@matronics.com Sent: Tuesday, January 06, 2009 8:11 PM Subject: Re: Kolb-List: ! Re: Landing video Kolb MK III In a message dated 12/29/2008 12:48:51 P.M. Eastern Standard Time, NeilsenRM@comcast.net writes: I have a Sigtronics head set with the Headsets ANR kit in them. They help a bunch but not enough so for a while I flew with ear plug also which caused hearing problems when tying to communicate. Lately I have been using Sony MDR-EX51LP headphones (like the MP3 players use) under my Sigtronics with the ANR on. These things are super for voice clarity and reduce outside noise almost as much as the foam ear plugs. No more ear ringing after flying. Hi Rick, I'm older than John h and I suppose my hearing is worse than his. Anyway, thought I might give your idea using the Sony headphones a try. But where did you get them? I've tried a couple of stores to no avail. And do I understand you correctly that they are not wired into your Sigtronics set, but just worn as ear plugs with the ANR turned on? Thanks for any help you can give. Bill Varnes Original Kolb FireStar Getting older every day!! Audubon NJ Do Not Archive ------------------------------------------------------------------------- ----- New year...new news. Be the first to know what is making


    Message 3


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    Time: 06:39:33 AM PST US
    Subject: Re: More flying videos
    From: "grantr" <grant_richardson25@yahoo.com>
    Cristal, It is a local R/c hobby shop that mostly sells r/c airplane. I am big into the r/c planes as well. I think the field is 1600 feet. They used to have a piper cub on the field however the shop owners brother had an engine failure I think 2 summers ago and crashed it. He is ok now. Its a nice private grass strip about 2 miles from ACJ. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=223327#223327


    Message 4


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    Time: 07:10:46 AM PST US
    From: "Richard & Martha Neilsen" <NeilsenRM@comcast.net>
    Subject: Re: C90 Brakes
    Rick Wow I thought you were selling your plane. It's super your still working on it. I have the stock Matco brakes and they will hold the plane at least till the tail comes up with the stock wheel size. A bigger issue is how the brake peddle to master cylinder leverage is configured. With toe peddles you are pushing against the rudder peddles and the bigger concern the rudder cables during brake activation. I have the heal peddles but I understand Paul Petty had a arrangement with more mechanical advantage. This may be the same set up that Mark German developed. Rick Neilsen Redrive VW Powered MKIIIC ----- Original Message ----- From: "Rick Lewis" <cktman@hughes.net> Sent: Monday, January 05, 2009 7:28 PM Subject: Kolb-List: C90 Brakes > > I am about to order the brakes for my Kolb M3X and am wondering if the C90 > brakes, that Kolb offers, is adequate. Looking at them they seem kinda of > wimpy. What are the pro and cons? I really like the neat installation > but wonder if they will do the job. > > Rick Lewis > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=223051#223051 > > > Attachments: > > http://forums.matronics.com//files/kolbs_yellow_planes_consturction_007_132.jpg > > >


    Message 5


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    Time: 07:34:52 AM PST US
    From: Mike Welch <mdnanwelch7@hotmail.com>
    Subject: Brake basics
    Kolb people, If anyone is interested, Grove Brake Co, and Matco, too, for that matter, have some useful brake design suggestions on their websites. Such things as pedal geometry, Kenetic Energy of your plane at landing speed, etc. Here is Grove's page: http://www.groveaircraft.com/brakedesign.html I used their K.E. formula to calculate my MkIII's kentic energy at landing. Looks like I'm in good shape. Theoretically, my disc brakes should stop a C-130. Either that, or I missed a decimal point. Hmmm? Mike Welch Mk130 _________________________________________________________________ Windows LiveTM: Keep your life in sync. http://windowslive.com/howitworks?ocid=TXT_TAGLM_WL_t1_allup_howitworks_012009


    Message 6


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    Time: 08:50:10 AM PST US
    From: "The Kuffels" <kuffel@cyberport.net>
    Subject: Re: Monument Vallley - Gouldings Campground
    do not archive John Hauck: << Larry and Karen Cottrell put their Taj Mahal complex up in the SE corner of the tent camping area. >> OK, will email Matilda and ask our site to be as close to the tent camping area as possible. John Hauck: << Guess you all got the new airplane flying. >> Boyd Young: << Are you going to fly or drive in this year >> Won't be flying down. Progress on the Sportsman is still slow, my stamina is not yet up to par. We are towing Betty's brand new Taj Mahal (all 16 feet of it) down and meeting up with Betty's sister and her husband. Plan to arrive Tuesday the 12th and depart Tuesday the 19th. Will be bringing some of my homebrew beer and the in-laws will bring some of their home-made wine. First come, first served. Tom Kuffel


    Message 7


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    Time: 12:01:22 PM PST US
    From: <apilot@surewest.net>
    Subject: Re: Brake basics
    I use the go kart brakes that Azusa engineering sells. They stop the plane after a bit and they are good enough to put the nose on the ground which I do to get a full power run up. They do not cost much, easy to install and seem to work good in all hard surface situations.


    Message 8


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    Time: 12:33:31 PM PST US
    From: "Jack B. Hart" <jbhart@onlyinternet.net>
    Subject: Dynamic Air Pressure Filter Housing
    Kolbers, In most tractor engine configurations, ram or dynamic air pressured air is fed into the carburetor. With a pusher propeller and the engine mounted so that the carburetor is above the wing the carburetor inlet is being fed with lower static air pressure than can be found below the wing. Last summer, I ran an experiment where I connected the carburetor inlet with a long tube to the air filter mounted on the main spar cross through at the root tube. One flight told me that I could not tolerate the inlet noise that close to my head. Also, the weight of the carburetor adapter and connecting tubing was a severe weight penalty. I have been grounded by winds, cold temperatures, snow, and ice so I began re thinking the problem. A dynamic air pressure scoop around the air filter seemed to be the way to go. The result of this thinking can be seen at: http://www.thirdshift.com/jack/firefly/firefly147.html To keep the weight down, I attached it directly to the air filter. This should more than make up for the 1.0 to 1.5 inches of water air filter loss that was found under cruise conditions. When the weather improves, I will be able to measure the carburetor static inlet pressure. The first test will be with the opening pointed upward or downward to simulate scoop inlet static pressure. Then the second test will run with the opening pointed forward. I really do not expect a huge improvement, but when you have only a few horses, it is a shame to waste any of them. Jack B. Hart FF004 Winchester, IN


    Message 9


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    Time: 02:26:31 PM PST US
    From: Dana Hague <d-m-hague@comcast.net>
    Subject: Re: Dynamic Air Pressure Filter Housing
    At 03:34 PM 1/7/2009, Jack B. Hart wrote: >...With a pusher propeller and the engine mounted so >that the carburetor is above the wing the carburetor inlet is being fed with >lower static air pressure than can be found below the wing.... >...A dynamic air pressure scoop around the air filter >seemed to be the way to go....This >should more than make up for the 1.0 to 1.5 inches of water air filter loss >that was found under cruise conditions... About 0.14 inches of mercury (1.9 inches of water) at 55 knots, or less than 1% of 1 atmosphere; 1/2HP for a 50HP engine (since output power is roughly proportional to intake air pressure)... seems unlikely it'd be noticeable. Can't hurt though, unless it comes loose and goes through the prop... -Dana -- In some cultures what I do would be considered normal.


    Message 10


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    Time: 06:08:47 PM PST US
    From: "Richard & Martha Neilsen" <NeilsenRM@comcast.net>
    Subject: Re: Dynamic Air Pressure Filter Housing
    Jack Nice work. I would like to make two suggestions. One you may want to allow for a way for water to get out of the scoop. If you get in a rain storm you might flood the engine. Also why not add a long taper to the back of the scoop to cut drag. I have had similar ideas for my VW. The big Webber air cleaners have considerable drag that I don't need. Also the small boost in air pressure would give me more horse power. I have been mulling over designs for some time and may steal some of your design. Rick Neilsen Redrive VW powered MKIIIC ----- Original Message ----- From: "Jack B. Hart" <jbhart@onlyinternet.net> Sent: Wednesday, January 07, 2009 3:34 PM Subject: Kolb-List: Dynamic Air Pressure Filter Housing > > Kolbers, > > In most tractor engine configurations, ram or dynamic air pressured air is > fed into the carburetor. With a pusher propeller and the engine mounted > so > that the carburetor is above the wing the carburetor inlet is being fed > with > lower static air pressure than can be found below the wing. Last summer, > I > ran an experiment where I connected the carburetor inlet with a long tube > to > the air filter mounted on the main spar cross through at the root tube. > One > flight told me that I could not tolerate the inlet noise that close to my > head. Also, the weight of the carburetor adapter and connecting tubing > was > a severe weight penalty. > > I have been grounded by winds, cold temperatures, snow, and ice so I began > re thinking the problem. A dynamic air pressure scoop around the air > filter > seemed to be the way to go. The result of this thinking can be seen at: > > http://www.thirdshift.com/jack/firefly/firefly147.html > > To keep the weight down, I attached it directly to the air filter. This > should more than make up for the 1.0 to 1.5 inches of water air filter > loss > that was found under cruise conditions. When the weather improves, I will > be able to measure the carburetor static inlet pressure. The first test > will be with the opening pointed upward or downward to simulate scoop > inlet > static pressure. Then the second test will run with the opening pointed > forward. I really do not expect a huge improvement, but when you have only > a > few horses, it is a shame to waste any of them. > > Jack B. Hart FF004 > Winchester, IN > > >


    Message 11


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    Time: 06:21:02 PM PST US
    From: "Jack B. Hart" <jbhart@onlyinternet.net>
    Subject: Re: Dynamic Air Pressure Filter Housing
    At 05:21 PM 1/7/09 -0500, you wrote: > >About 0.14 inches of mercury (1.9 inches of water) at 55 knots, or less >than 1% of 1 atmosphere; 1/2HP for a 50HP engine (since output power is >roughly proportional to intake air pressure)... seems unlikely it'd be >noticeable. > >Can't hurt though, unless it comes loose and goes through the prop... > Dana, I believe the pressure change will be greater than 1.5 inches of water, as the air is passing through the propeller is much greater than IAS. I won't know what it is until I measure it, but if air velocity past the carburetor has to be much higher than 55 knots IAS. Jack B. Hart FF004 Winchester, IN


    Message 12


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    Time: 06:51:10 PM PST US
    From: Dana Hague <d-m-hague@comcast.net>
    Subject: Re: Dynamic Air Pressure Filter Housing
    At 09:22 PM 1/7/2009, Jack B. Hart wrote: >I believe the pressure change will be greater than 1.5 inches of water, as >the air is passing through the propeller is much greater than IAS. I won't >know what it is until I measure it, but if air velocity past the carburetor >has to be much higher than 55 knots IAS. Good point... though I don't know how much faster it'll be on the upstream side of the prop, as compared to behind the prop. Be interesting to see. -Dana -- Come to think of it, there already are a million monkeys at a million typewriters, and the Internet is _NOTHING_ like Shakespeare!


    Message 13


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    Time: 07:06:11 PM PST US
    From: "Jack B. Hart" <jbhart@onlyinternet.net>
    Subject: Re: Dynamic Air Pressure Filter Housing
    At 09:04 PM 1/7/09 -0500, you wrote: > >Jack > >Nice work. I would like to make two suggestions. One you may want to allow >for a way for water to get out of the scoop. If you get in a rain storm you >might flood the engine. Also why not add a long taper to the back of the >scoop to cut drag. > Rick, I considered the rain/water problem. If you look at the last photo on the page, you will see a series of little holes along the corner or edge of the assembly. These are the relief holes for bending the tabs along the edge of the main body. I did not seal them so that water could leak out. Later if an oil slobbering problem develops, I will seal them and add a drain or relief tube so that I can run the oil and/or water to a catch bottle. This will prevent oil spatter on the tail surfaces. I did consider streamlining the scoop, but at this time I am more concerned with the added weight. After, I get done testing and if it proves to be worth while, I may stream line it with foam that is covered with organza fabric. I worry about too much weight hanging out from the carburetor boot. Jack B. Hart FF004 Winchester, IN




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