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HomeAircraftHelicopterHelicopter Main Discussion › 450, 500 DIY Tail Nite Blades
06-15-2013 01:52 AM  5 years agoPost 1
liftforwardrrNovice - boston, ma - usa - My Posts: All  Forum  Topic

First I would like to thank all those out there who made diy main blades so easy to understand and put into reality... However I had very difficult times trying to apply that same idea to tail blades... until I found something similar to what I am going to share.

Now the issue with tail blades is their size and weight. I tried putting batteries on the tail surface, putting batteries on the tail hub but nothing seemed to work right.. until I saw someone put LEDs into the tail and that got me thinking..

so here is what I came up with.

First I will be using cr927 buttom batteries. they are small thin and have the 3v needed to drive 1 blue, white, or green led without resistor.

Next, I drilled a hole through the blade near the root using a 3/8 drill. Just about the same OD as the battery.

Then you lay out the copper foil tape like the rest of the diy projects out there for main blades.. except you take one line and wrap it into the hole to give you the positive connection to the battery.

the trickiest part was to make a way to complete the connection without having the LED always on. I tried tying wire together (too insecure and could be damaged during flight), slip switches, toggle switches, push button are all to big. I finally came up with a female to female connector pair that requires a jumper pin to complete the connection.

After that you shrink wrap and there you go.

The only down side is that the batteries are not rechargable and they only work for 1hr life. After that you need to replace and reshrink to use.

Thoughts or improvements are very welcome, can always make it better.

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06-15-2013 02:25 AM  5 years agoPost 2
AWittleWabbit

rrElite Veteran

O.C., CA

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Neat idea there as there are no lighted. 450 sized night tail blades.

One concern, the battery is mostly behind the cg/center of lift chord wise(width). It may make the the blades lead forward and make them a bit unstable.Proceed carefully as you've now weakened the tail and added more mass.

I recently got some night blades myself and find not having real night tails a bummer. I think the best way is lights on the tail and power them through a slip ring.

Watch at YouTube

I used homemade slip rings on the autogyro you see in the vid. I've thinking of doing the same for the tail of my pro. I may use some components from the axe SSL night flyer microheli to do so.

Heli-itis sufferer.

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06-15-2013 03:31 AM  5 years agoPost 3
RCHSF

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NC

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Very nice, great job.

Is it possible to put a tiny magnet on the tail case somewhere. And have some copper wire wrapped around the blade, and use the rotation of the wire passing the magnet real fast to power the LED like a generator?

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06-15-2013 04:24 AM  5 years agoPost 4
sewerfly

rrApprentice

el cajon CA USA

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Very nice I wanna try that on a MCPX BL

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06-15-2013 05:15 AM  5 years agoPost 5
AWittleWabbit

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O.C., CA

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Is it possible to put a tiny magnet on the tail case somewhere. And have some copper wire wrapped around the blade, and use the rotation of the wire passing the magnet real fast to power the LED like a generator?
That would be cool! 450 tails are spinning north of 10k. It would probably be the slickest way to power them.
Very nice I wanna try that on a MCPX BL
Have you looked at the Hobbico SSL? I might buy all the night flying bits and try to graft them on the MCPX BL

Heli-itis sufferer.

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06-16-2013 06:47 PM  5 years agoPost 6
liftforward

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boston, ma - usa

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an led generator, sounds interesting. not sure if the led can use that as a power source and how you get the desired voltage.

the slipring idea is interesting. My problem has always been getting the powersouce in an easy location and having a circuit that can withstand the spinning force and still work.

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06-16-2013 11:24 PM  5 years agoPost 7
AWittleWabbit

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O.C., CA

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the slipring idea is interesting. My problem has always been getting the powersouce in an easy location and having a circuit that can withstand the spinning force and still work.
The 450 tail would take some work. If the tail shaft were hollow and longer, it would be easy. A small ring would easily handle. A brushed motor does it all day.

Have you flown your blades yet? I hope they work. Just be careful in case it slings a blade. I love to see a purpose built night tail blade around ~60mm from edge or Mscomposit.

Heli-itis sufferer.

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06-21-2013 09:49 PM  5 years agoPost 8
RCHSF

rrKey Veteran

NC

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liftforward you could use a tiny bit and drill a hole down through the leading edge of the blade, and have the wire contact the head of a T-pin used to pin plans down. When you insert the t-pin down into the blade it would contact the wire, and also the battery on the - side underneath. On/Off to save the batts.

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