AeroElectric-List Digest Archive

Tue 05/30/17


Total Messages Posted: 7



Today's Message Index:
----------------------
 
     1. 03:43 AM - Automatic header tank filling (Peter Sokolowski)
     2. 11:05 AM - Re: Automatic header tank filling (Robert L. Nuckolls, III)
     3. 11:59 AM - Re: IVO Prop current limiter (kfav8r)
     4. 07:51 PM - Dsub Connector Shell With Female Threaded  (William Hunter)
     5. 08:23 PM - Re: Dsub Connector Shell With Female Threaded (don van santen)
     6. 08:27 PM - Re: Dsub Connector Shell With Female Threaded (Daniel Hooper)
     7. 08:44 PM - Re: Dsub Connector Shell With Female Threaded (Art Zemon)
 
 
 


Message 1


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    Time: 03:43:48 AM PST US
    From: Peter Sokolowski <air.peter@googlemail.com>
    Subject: Automatic header tank filling
    Hi, I am flying a Lancair 360 with wing tanks and the standard header tank. Rather thinking every 20 to 30 minutes to fill up the header tank again I would like to have an automatism filling the tank. I have a capacitive fuel gauge (output 0 to 5 V) and an independent emergency reminder looking up at the annunciator panel @ about 5 gallons. Rather re-inventing the wheel - is there a circuit diagram out there I can use for such a fuel filling mimic ? Thanks in advance, Peter LNC 360 MKII D-EPSO


    Message 2


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    Time: 11:05:30 AM PST US
    From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
    Subject: Re: Automatic header tank filling
    Hi, I am flying a Lancair 360 with wing tanks and the standard header tank. Rather thinking every 20 to 30 minutes to fill up the header tank again I would like to have an automatism filling the tank. I've done a couple of similar systems. Last one was for the Piaggio P-180. I have a capacitive fuel gauge (output 0 to 5 V) and an independent emergency reminder looking up at the annunciator panel @ about 5 gallons. The analog output makes the 'control' easy to do. The dragon to slay is failure mitigation. Any time you add a automatic feature to the airplane, it's wise to assume that it will fail at some point. What are the ways it can fail? How will you become aware of the failure? Is the failure pre-flight detectable? What are plans A, B, etc. for dealing with the failure(s)? You have a low level warning light . . . this should be totally independent of any other function. Suppose the transfer sticks ON and overfills the tank. What happens if the tank is over filled; what happens to excess fuel? Is there a practical way to add a high level warning? Rather re-inventing the wheel ' is there a circuit diagram out there I can use for such a fuel filling mimic ? You can watch the dc voltage from the fuel gage with a comparator that will, for example, turn the transfer ON at 3 volts or below and OFF at 4 volts or above . . . or what ever hysteresis values seem most practical. The existing low level warning backs up a failure to transfer, some kind of high level warning should back of a failure to stop transferring. Bob . . .


    Message 3


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    Time: 11:59:09 AM PST US
    Subject: Re: IVO Prop current limiter
    From: "kfav8r" <kfav8r@outlook.com>
    Will do Bob. Thanks! -------- Doug Read this topic online here: http://forums.matronics.com/viewtopic.php?p=469718#469718


    Message 4


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    Time: 07:51:29 PM PST US
    From: "William Hunter" <billhuntersemail@gmail.com>
    Subject: Dsub Connector Shell With Female Threaded
    Hi All, I have a couple of instances where I need to mate a male Dsub to a female Dsub end to end within the length of a wire bundle (example: connect the under panel wire harness to the wire harness of the control stick). I already have the male and female Dsub connectors wired up and they are connected end to end and I have the plastic shells (see below) however the metal screws of the one shell needs to screw into a threaded bore of the other connector so that the two connectors do not disconnect. Kinda like when you attach the Dsub connector to the back of a computer the plug slides into the receptacle and then the screws on the connector shell thread into the threaded bore of the computer case. How does one (me) do this on an end to end connector? .. Cheers!!! Bill Hunter


    Message 5


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    Time: 08:23:10 PM PST US
    From: don van santen <donvansanten@gmail.com>
    Subject: Re: Dsub Connector Shell With Female Threaded
    multiple ways to to this 1 buy one connector with built in nuts (Stein has these) 2 remove screws and use zip ties to hold the connectors together. On May 30, 2017 19:56, "William Hunter" <billhuntersemail@gmail.com> wrote: > Hi All, > > > I have a couple of instances where I need to mate a male Dsub to a female > Dsub end to end within the length of a wire bundle (example: connect the > under panel wire harness to the wire harness of the control stick). > > > I already have the male and female Dsub connectors wired up and they are > connected end to end and I have the plastic shells (see below) however the > metal screws of the one shell needs to screw into a threaded bore of the > other connector so that the two connectors do not disconnect. Kinda like > when you attach the Dsub connector to the back of a computer the plug > slides into the receptacle and then the screws on the connector shell > thread into the threaded bore of the computer case. > > > How does one (me) do this on an end to end connector? > > > [image: > http://www.steinair.com/wp-content/uploads/2016/03/SA-1030-BACKSHELL-DSUB15-L-DSC09853.jpg] > > > .. > > > Cheers!!! > > > Bill Hunter > >


    Message 6


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    Time: 08:27:58 PM PST US
    From: Daniel Hooper <enginerdy@gmail.com>
    Subject: Re: Dsub Connector Shell With Female Threaded
    I think you want something like this female screw kit: http://www.mouser.com/search/ProductDetail.aspx?qs=5KjJMQyy%252baNdw8WXW xtgeQ%3d%3d <http://www.mouser.com/search/ProductDetail.aspx?qs=5KjJMQyy%2baNdw8WXWx tgeQ==> It attaches to the contact portion before you install the back shell. Each one should contain a kit for one connector pair, and you can just use the provided male threaded hardware with the other one. Be careful to either tighten the female nuts adequately or use some Loctite to keep the nuts from falling out if you ever need to separate the two connectors. Here is a similar part from SteinAir http://www.steinair.com/product/dsub-nut-pack-4-40-thread-size/ <http://www.steinair.com/product/dsub-nut-pack-4-40-thread-size/> or you can also buy one with built in female lugs like this: http://www.steinair.com/product/9-pin-male-dsub-connector-with-4-40-lugs/ <http://www.steinair.com/product/9-pin-male-dsub-connector-with-4-40-lugs/ > These last ones are nice because you never have to worry about the lugs backing out when you take the connectors apart! > On May 30, 2017, at 9:49 PM, William Hunter <billhuntersemail@gmail.com> wrote: > > Hi All, > > I have a couple of instances where I need to mate a male Dsub to a female Dsub end to end within the length of a wire bundle (example: connect the under panel wire harness to the wire harness of the control stick). > > I already have the male and female Dsub connectors wired up and they are connected end to end and I have the plastic shells (see below) however the metal screws of the one shell needs to screw into a threaded bore of the other connector so that the two connectors do not disconnect. Kinda like when you attach the Dsub connector to the back of a computer the plug slides into the receptacle and then the screws on the connector shell thread into the threaded bore of the computer case. > > How does one (me) do this on an end to end connector? > > > <image002.jpg> > > .. > > Cheers!!! > > Bill Hunter


    Message 7


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    Time: 08:44:30 PM PST US
    From: Art Zemon <art@zemon.name>
    Subject: Re: Dsub Connector Shell With Female Threaded
    Bill, I hate those screws. I have seen barrel connectors which are female on both ends, stuck between two D-sub shells. They require having a screwdriver on both ends, Pain-in-the-a**. I am planning to use a pair a zip ties in a X in the places where I have D-sub connectors in my plane. I would rather cut and replace the zip ties than mess around with the screws. I will be really interested to see if anyone has better ideas. -- Art Z. On Tue, May 30, 2017 at 9:49 PM, William Hunter <billhuntersemail@gmail.com> wrote: > Hi All, > > > I have a couple of instances where I need to mate a male Dsub to a female > Dsub end to end within the length of a wire bundle (example: connect the > under panel wire harness to the wire harness of the control stick). > > > I already have the male and female Dsub connectors wired up and they are > connected end to end and I have the plastic shells (see below) however the > metal screws of the one shell needs to screw into a threaded bore of the > other connector so that the two connectors do not disconnect. Kinda like > when you attach the Dsub connector to the back of a computer the plug > slides into the receptacle and then the screws on the connector shell > thread into the threaded bore of the computer case. > > > How does one (me) do this on an end to end connector? > > > [image: > http://www.steinair.com/wp-content/uploads/2016/03/SA-1030-BACKSHELL-DSUB15-L-DSC09853.jpg] > > > .. > > > Cheers!!! > > > Bill Hunter > > -- https://CheerfulCurmudgeon.com/ *"If I am not for myself, who is for me? And if I am only for myself, what am I? And if not now, when?" Hillel*




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