World's longest SF KL3 setup flexibly explored

lemlux

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World\'s longest SF KL3 setup flexibly explored

Enquiring minds wanted to know what happened if you kept on adding SF body extenders and batteries to drive a KL3 at various voltages. I have round bezel, round barrel 3P's, 6Ps', and 9P's. My KL3 works with each (although the 3P needs at least one A19 to get the voltage up.)

Performance is regulated to be the same to my eyes (at least until battery drops below the Vf of the Luxeon) powered by anywhere between 3.7 V and 9.0 V including the following combinations:
1 @ 3.7 V lithium
3 @ 1.25 V NiMH A cells or 1.5 V Alkaline AA's
1 @ CR123 + 1 @ AA or A cell
1 @ 3.7 V lithium + AA or A cell
4 @ 1.25 V NiMh A or 4/5 A cells
2 @ CR123's
1 @ 3.7 V lithium + 1 @ CR123
2 @ 3.7 V lithium
2 @ CR123's + 1 AA or A cell
1 @ CR123 plus 4 @ AA or A
5 @ AA or A's
2 @ 3.7 V lithium + 1 @ AA or A,
2 @ CR123's + 2 @ AA or A cell
3 @ CR123.
6 @ AA or A's
7 @ 1.25 V NiMH A's or AA's (these would probably blow a P90, but not the KL3.)

I frivously decided to see how many working combinations I could put together in this voltage range.

Some of these combinations required an interesting combination of 6P or 9P body plus A14s and/or A19's. I have 6 @ A19's and 2 @ A14's. With these parts you can get to the 7 AA length with a 9P + 5 A19's plus an A14. To get even longer I next substituted 5 @ 4/3 A cells for A's to add the sixth A19 and second A14. This made the overall battery length = 8 AA cells plus 1 123 = 17.4 " . If I had another A19 I could have used 7 @ 4/3 A cells for total battery length of 18.7" which is equivalent to 9 1/3 A cells

The KL3 works very well and very flexibly. BTW, for Roy's and Klaus' benefit, I haven't performed, and don't intend to perform, a run time test with 5 @ 3800 mAh 4/3 A cells plus 3 @ 2700 mAh A cells.
 

MR Bulk

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Re: World\'s longest SF KL3 setup flexibly explored

Interesting Clark. With the Turbo head, proper LA and loooooooong body, could you replicate the M6?
 

lemlux

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Re: World\'s longest SF KL3 setup flexibly explored

Charlie:

Brock reports that the 500 Lu M6 MN21 HOLA runs at 6.1 V and 4.9 A. I suppose that 4/3 A cells might exist that can deliver 4.9 A at a steep voltage drop.

A better bet electrically would be to use the 500 Lu N62 designed for the 12PM that Brock measures at 7.65 V and a far more manageable 3.7 A. One could probably get there with 7 or 8 3800 mAh to 4200 mAh 4/3 high current A cells driven at < C. In other words, it would take the length of a 9P the same size or 68mm longer than the longest configuration I discuss above.

I presently drive my N62's in 3" TH's mounted to a 3P body into which I've epoxied a SF dummy cell and attached terminal connectors to which I connected leads with an in-line switch and a Tamaya connector.

This TH now spends it's time mounted to a 7 C 4000 mAh MiMH cell project light (a modified Big Beam 166 with the sealed beam removed). It will probably spend some of its time mounted to an 8.4 V 3000 mAh Sub C pack like this in the future: http://www.bydusa.com/product.asp?0=278&1=279&3=77 Until I get a more attractive idea to connect TH to Airsoft battery, I'd breadboard by using a hose clamp to mount the 3P body to the forward end of the battery pack. The expanding cone of the TH would point forward, and the whole package would probably be about 9" long compared to 7.75" for the M6. Run time would probably be around 40 to 45 minutes.

If you wanted to go shorter with a wider hot spot, you could use the M6's HOLA and a 7.2 V R/C Sub C pack which would total about 8" in length.
 

lemlux

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Re: World\'s longest SF KL3 setup flexibly explored

Did I mention that the plastic sleeves removed from DB4AA's to allow the use of CR123's make nice sleeves when AA's are used in SF 123 bodies? The DB6AA and DB8AA caddies can also be used, but they complicate matters by adding length..
 

lemlux

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Re: World\'s longest SF KL3 setup flexibly explored

Nerd:

I am interested in seeing details of what eventually becomes available in Lithium Polymer cells and packs. The high 3-4 C discharge rates discussed are very appealing although I didn't see much discussion of cycle life.

I wonder when convenient form factor LiPoly cells will become available.
 
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