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  #91  
Old 01-26-2014, 09:05 AM
Toobuilder's Avatar
Toobuilder Toobuilder is offline
 
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Looking way back to post #11, Rocketbob indicates the noise can be essentially eliminated.
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Michael Robinson
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Harmon Rocket II -SDS EFI
RV-8 - SDS CPI
1940 Taylorcraft BL-65
1984 L39C
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  #92  
Old 01-26-2014, 02:51 PM
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catmandu catmandu is offline
 
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Quote:
Originally Posted by Bavafa View Post

Thanks, same question for Mike See's setup. I wonder if those flash light type lights create any RF.
Most definitely. Will use the Rocket Bob method to try and eliminate the noise.
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  #93  
Old 01-26-2014, 05:34 PM
Bavafa Bavafa is offline
 
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Quote:
Originally Posted by catmandu View Post
Most definitely. Will use the Rocket Bob method to try and eliminate the noise.
Look forward to see the results. I have done the same thing in my setup with the HID lights and has certainly suppressed a good amount of noise but not completely.

I am tracking my lOC/GS and turn on the lights, I will lose the signal for a sec or two. One example of seeing the effect of RF in my system.

Thanks for sharing your results
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  #94  
Old 01-26-2014, 06:19 PM
Rv8Medic Rv8Medic is offline
 
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Default Wide cornering kit

Have you considered putting the "wide cornering kit" on one of the lights? It may help for taxiing. At $26 it might be worth trying. Thanks for your post. Did you notice what the amp output is?
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  #95  
Old 01-26-2014, 09:06 PM
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Toobuilder Toobuilder is offline
 
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Ok, I have one side done and can post some results.










As you can see, I simply made a new mount plate out of .032 sheet and trapped the lens cover and body in between. I made life a bit harder on myself by retaining the o ring seals so I simply chucked the body in the lathe and back cut .032. This would not be required if you're not worried about the o ring seals.

For the power connector, I once again used the lathe to machine the "body" of the battery tube down to a manageable size, and then machined a nylon bushing to fit inside. I drilled the center of this bushing and inserted a #10 countersunk screw which contacts the center spring on the light head and provides a stud for the positive power lead. The side of this modified battery tube was drilled and tapped for the ground stud, and also holds the center bushing in place.

It should be noted that there are at least two different versions of this flashlight. Outwardly, they appear identical, but one has one additional cooling fin, no spring for the ground connection, and the threads that hold the whole mess together are different. I ordered the 4 I own in batches of two within days of each other, and I have two of each. Not a big deal except that the 5 functions are in a different sequence when you cycle through the modes. Also, the "extra cooling fin" version seems to throw a lot more RFI.

As for performance, they are simply blinding. And I didn't think the multiple modes would be of use, but the strobe and SOS functions will work fine for a wig wag. And for those wondering, full output for the pair of lights is measured at 1.6 amps. The lights are aimed in the flight position and as expected with the Rocket's tall gear, point well up with the tail on the ground. There is still enough spill over to see the runway/taxiway, however. That was a nice surprise. The last picture shows the comparison to the standard GE 100w aircraft landing light against my hangar. The beam pattern is better on the LED's as is the color, but I think there is not much difference in intensity when compared to the 100w if in its narrow "sweet spot".

I have yet to fly with them, but all in all, these $25 flashlights seem to be a real improvement.
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WARNING! Incorrect design and/or fabrication of aircraft and/or components may result in injury or death. Information presented in this post is based on my own experience - Reader has sole responsibility for determining accuracy or suitability for use.

Michael Robinson
______________
Harmon Rocket II -SDS EFI
RV-8 - SDS CPI
1940 Taylorcraft BL-65
1984 L39C

Last edited by Toobuilder : 01-26-2014 at 09:35 PM.
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  #96  
Old 01-26-2014, 09:28 PM
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rocketbob rocketbob is offline
 
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Mike it appears your lights are aimed pretty high. In the 3pt attitude mine are slightly above level.
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Bob Japundza CFI A&PIA
N9187P PA-24-260B Comanche, flying
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  #97  
Old 01-27-2014, 10:07 AM
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Toobuilder Toobuilder is offline
 
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Bob, Yes they are high but I still need to play with them. I think I'm looking more for recognition with these than for seeing as far down that taxiway as possible. So considering the high directionality of LED's, I'd rather bias the mounting to provide a level attitude in flight. We'll see how it plays out.
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WARNING! Incorrect design and/or fabrication of aircraft and/or components may result in injury or death. Information presented in this post is based on my own experience - Reader has sole responsibility for determining accuracy or suitability for use.

Michael Robinson
______________
Harmon Rocket II -SDS EFI
RV-8 - SDS CPI
1940 Taylorcraft BL-65
1984 L39C
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  #98  
Old 01-27-2014, 02:45 PM
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catmandu catmandu is offline
 
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Well, shoot, can't get rid of the RFI. Tried a single Radio Shack Ferrite wrapped seven times, then two sandwiched in parallel with 14 wraps (7 each long side) and it didn't make a dent. Time to go get smart on RFI. Perhaps having the lamp 12 inches from the bent whip is the issue?
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  #99  
Old 01-27-2014, 03:30 PM
Bavafa Bavafa is offline
 
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Quote:
Originally Posted by catmandu View Post
Well, shoot, can't get rid of the RFI. Tried a single Radio Shack Ferrite wrapped seven times, then two sandwiched in parallel with 14 wraps (7 each long side) and it didn't make a dent. Time to go get smart on RFI. Perhaps having the lamp 12 inches from the bent whip is the issue?
I think that would be the challenge.

Other suggestion would be to try the ferrite at different location, with my HID, the most effect was the location of the ferrite as oppose to the number of wraps.

Also, you could put twist on your positive and negative leads that goes to the light and as the last resort, try wrapping it in the aluminum foil. See if any of that yields better results.
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  #100  
Old 01-27-2014, 03:59 PM
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Toobuilder Toobuilder is offline
 
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One of my EE guys suggested a .1uF capacitor between power and ground, close to the light as possible.
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WARNING! Incorrect design and/or fabrication of aircraft and/or components may result in injury or death. Information presented in this post is based on my own experience - Reader has sole responsibility for determining accuracy or suitability for use.

Michael Robinson
______________
Harmon Rocket II -SDS EFI
RV-8 - SDS CPI
1940 Taylorcraft BL-65
1984 L39C
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