---------------------------------------------------------- Zenith601-List Digest Archive --- Total Messages Posted Fri 10/15/10: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 01:34 AM - ray allen flap position sender indicator (chris Sinfield) 2. 03:26 AM - Re: ray allen flap position sender indicator (DaveG601XL) 3. 05:43 AM - Re: ray allen flap position sender indicator (Paul Mulwitz) ________________________________ Message 1 _____________________________________ Time: 01:34:51 AM PST US Subject: Zenith601-List: ray allen flap position sender indicator From: "chris Sinfield" Gang which Ray Allen flap sender is used for the flaps on the XL? RAC POS-5 or the POS -12 which RAC indicator can i be used for ? Chris.. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=315790#315790 ________________________________ Message 2 _____________________________________ Time: 03:26:10 AM PST US Subject: Zenith601-List: Re: ray allen flap position sender indicator From: "DaveG601XL" Chris, I cannot answer specifically which position sender will work best because I do not use one at all. A quick glance out to the left gives me all the indication I need. I have not missed being without a flap indication instrument. Good luck, -------- David Gallagher 601 XL/Jabiru 3300 First flight 7/24/08 Upgraded 3/19/10 150+ hours and climbing! Read this topic online here: http://forums.matronics.com/viewtopic.php?p=315793#315793 ________________________________ Message 3 _____________________________________ Time: 05:43:11 AM PST US From: "Paul Mulwitz" Subject: RE: Zenith601-List: ray allen flap position sender indicator Hi Chris, I bought one of the Ray Allen sensors but I haven't installed it yet. I think most of the sensors can be made to work. You need some sort of voltmeter with a modified face to reflect flap position instead of volts. Then you need a variable resistor (such as the Ray Allen sensor) and you need to figure a way to install it so flap motion makes it move. This might be some sort of bracket to put it in a good position and a way to attach it to the flap control arm. The electric circuit should have a dividing resistor (perhaps from Radio Shack). This allows the sensor to actually change the output voltage when the arm moves. Then you need a fuse or other current limit device to prevent fire or damage if there is a short circuit. When it is all assembled you can calibrate the reading for the desired marks on the face of the indicator. I scribbled up a possible electrical circuit for this function and copied it below. It needs some more design work before you can install it in your plane. First you need to decide how much current to run through the sensor in the maximum case. This determines the size of the meter needed and the resistor value. A good place to start might be 50 milliamps. Then obtain a meter that is at least that large - perhaps a 50 mA sensor calls for a 100 mV meter. If you use this kind of current then a 1 amp fuse might work just fine (you don't want the fuse too close to the actual current used - just small enough to trip when a short circuit happens and huge current is called for). There are many sources for meters and resistors. Wire should probably be aircraft grade stuff, but with this kind of current the size is not important. I limit wire to 22 AWG as the smallest choice for mechanical reasons. Ohms law: I = E/R can be used to solve for all the current voltage and resistance values needed. I is current in amps, E is voltage in volts, R is resistance in ohms. If you get stuck on any of the steps please feel free to contact me offline. (Sorry for the tutorial post. I used to design stuff like this, and a lot more complicated stuff, for a living many years ago). Paul Camas, WA -----Original Message----- From: owner-zenith601-list-server@matronics.com [mailto:owner-zenith601-list-server@matronics.com] On Behalf Of chris Sinfield Sent: Friday, October 15, 2010 1:32 AM Subject: Zenith601-List: ray allen flap position sender indicator Gang which Ray Allen flap sender is used for the flaps on the XL? RAC POS-5 or the POS -12 which RAC indicator can i be used for ? Chris.. 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