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  #11  
Old 01-21-2019, 12:16 PM
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jcaplins jcaplins is offline
 
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Location: Davis, CA, USA
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Quote:
Originally Posted by Av8torTom View Post
for all the replies..

So it sounds like a 3 position switch would be called for. Strobes (up), wigwag (down) and off (middle)? Make sense?
(Edited: Deleting invalid comment; pay no attention to me)
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Last edited by jcaplins : 01-21-2019 at 12:46 PM. Reason: I don't know what i'm talking about.
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  #12  
Old 01-21-2019, 12:26 PM
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Av8torTom Av8torTom is offline
 
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Default Jeff

thanks - on the FlyLED system the strobes and wigwag are the same LEDs so I'm thinking

Switch 1 = Position lights (on/off)
Switch 2 = Landing (up) off (middle) Taxi (down)
Switch 3 = Strobes (up) off (middle) wigway (down)
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  #13  
Old 01-21-2019, 12:33 PM
Iluke Iluke is offline
 
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Location: Hope Valley, Rhode Island
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Quote:
Originally Posted by Av8torTom View Post
for all the replies..

So it sounds like a 3 position switch would be called for. Strobes (up), wigwag (down) and off (middle)? Make sense?
I just wired mine with a three position toggle but I have wired for down-off, middle-landing lights on steady, up- wigwag. I have all my other switches set up with down being off and I wanted them all to be consistent.
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  #14  
Old 01-21-2019, 12:58 PM
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Av8torTom Av8torTom is offline
 
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Default Sure

Can be wired any way that makes most sense to you.
I was asking if a 3 position switch made sense.
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  #15  
Old 01-21-2019, 01:09 PM
unitink72 unitink72 is offline
 
Join Date: Oct 2014
Location: Cedar Rapids, IA
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Default My plan

Here's what I'm doing. I have the traditional flyLEDs on the wingtips and duckworks/Baja in the leading edges

Nav/Pos Switch:
Down - Off
Middle - Position Lights
Up - Position + Strobes

Landing Lights Switch -
Down -off
Middle - Wigwag (just the landing lights)
Up - Full On

I'm wigwagging only the landing lights.
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Last edited by unitink72 : 01-21-2019 at 01:10 PM. Reason: formatting
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  #16  
Old 01-21-2019, 01:59 PM
Paul 5r4 Paul 5r4 is offline
 
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Location: Foley, Al
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I turn on my wig wags just before takeoff. Part of my checklist. I leave them on during the entire flight day or night. If it's a night landing, the last thing I do after turning final is wig wag switch to off and both L/R landing light switches to on. I have the flyLED's nav/strobe and Baja Design spots for taxi/landing/wig wags.

I've posted this interesting note somewhere in another thread here on VAF. When I was researching the advantages to wig wags, someone had referenced a study done by Quantes Airlines. They had placed wig wags on a portion of their fleet and found that those WITH wig wags had a 10-50% reduction in bird strikes compared to those aircraft without them. A bird strike on an airliner is big money in lost revenue and repairs.

So, from that I can only conclude that with wig wags, an aircraft is more easily noticed by birds as well and that's a good thing too.

Here is a picture taken of my plane. Wig wags were on so this is actually only ONE Baja Design wingtip LED light. This was about 20 miles out from where the picture was taken. I'm loving these LEDS!

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  #17  
Old 01-21-2019, 02:41 PM
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rjcthree rjcthree is offline
 
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Default Down off, middle wig wag, up both

The natural flow of switches in my panel is down off, up on. I used the middle for wig wag.
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  #18  
Old 01-22-2019, 05:12 AM
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Paul from Flyleds Paul from Flyleds is offline
 
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Location: Melbourne, Australia
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Default

Quote:
Originally Posted by Av8torTom View Post
... on the FlyLED system the strobes and wigwag are the same LEDs so I'm thinking...
Hi Tom

For our "Original" kit this is correct. We figured for those daytime flyers that had no landing lights, having something wigwagging is far better than having nothing.

For our "Works" kit the wigwag function is associated with the landing lights, as they have better forward reach, so it makes sense to group these functions on the same switch.
Then when you turn the strobes on, depending on a switch setting on the controller board, the strobe LEDs can either do their regular strobe thing (on the opposite wing to the wigging or wagging landing light), or they can also be set to join in the wigwag show along with the landing lights.
Just in case you weren't bright enough already...

For a minimal switch setup I would go with:
Switch 1: Position/Position + Strobes
Switch 2: Landing/Wigwag
Switch 3: Taxi

Switch 1 & 2 could be either centre-off type or progressive (off-on-on) switches.

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  #19  
Old 01-22-2019, 09:58 AM
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Av8torTom Av8torTom is offline
 
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Default Thanks Paul

OK, I think I was confused because the instructions talk about needing the heat sinks on the strobe LEDs for their wigwag function...
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  #20  
Old 01-22-2019, 12:27 PM
keitht keitht is offline
 
Join Date: Jun 2016
Location: coupeville wa
Posts: 36
Default Wing wag considerations

I just wanted to share my rationale for how to arrange switches for the landing lights based on functional and safety considerations. This is part of a conversation I have had with Paul at Flyleds. I am building an RV-7A that will be IFR capable with two Duckworth style landing lights.

I looked at how to arrange switches and functions from a couple of considerations.

1. Based on phases of flight
2. Safety and failure modes

1. Phases of flight
a. Startup and taxi for takeoff
i. Landing lights in low power (both on) continuous.
b. Line up and take off (VFR & IFR)
i. Landing lights in high power (both on) continuous.
c. Climb out (VFR)
i. Landing lights in high power (both on) in wing wag.
d. Climb Out (IFR)
i. Landing Lights off
e. Cruise (VFR)
i. Landing Lights in wing wag.
f. Cruise (IFR)
i. Landing Lights off
g. Descent and join pattern (VFR)
i. Landing lights in wing wag.
h. Descent and approach capture (IFR)
i. Landing lights off.
i. Established on Final approach (IFR and VFR)
i. Landing lights on Continuous.
j. Ground ops to parking (beyond the hold line)
i. Landing lights in low power (both on) continuous
2. Safety considerations
a. Probability of loss of function or erroneous function during (a),(c),(e), (g), (j)
i. Not critical < (1:10 E-3 per flight hour)
b. Probability of loss of function or switching to wing wag during (b), (d),(f), (h), (i)
i. Critical < (1: 10E-6 per flight hour)
c. Probability of not being able to switch off landing lights (a) through (j)
i. Critical < (1:10E-6 per flight hour)
I considered day time and night time VFR and IFR operations together with past experiences of having landing light failures at night at critical times on poorly lighted airfields. Training here in the US is focused on being able to land at night without the aid of landing lights so if the lights go into wing wag or start flickering the training is to turn them off and concentrate on flying the plane to a landing.
Of course it is possible to overthink this and make it way more complicated than it needs to be.
Cutting to the chase – I would go with a variation on your option 2 (DIAGRAM B) where the two switches are labeled
1 (on -off) Landing lights (DPST) Basically a “kill” switch.
2 (On-off-on) (Taxi - both on low power)– (continuous – both on high power)– (wing-wag) (DPDT/TPDT ?) This configuration of switch positions makes the sequence of operations match the order of needs. I haven’t thought through the wiring for the DPDT/TPDT switch so depending on how you have arranged the circuit that may not work and it may need some further thought on the switch configuration needed.
This configuration adds a switch to the panel but makes the operational procedures very straightforward for the more critical IFR procedures. Getting distracted by technology is a very real problem even for professional pilots so having a simple way out is important.
I could make a guess at the circuit you have for the wing wag module but my thought was to just add resistors in the “Taxi” switch contacts to drop the landing light LED power. I am using the Duckworth rectangular models with H3 LED lamps from one of the Amazon suppliers. I have tried a couple of different offerings to check out the beam pattern and settled on one as the preferred solution. I haven’t done any nighttime testing yet to figure out what the ballast resistor needs to be for the taxi function.

Paul suggested an alternate method for the "Taxi" mode that needs more thought and more work.

Keith Turner
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