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Old 06-20-2008, 05:23 AM   #1 (permalink)
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What hammer weights do nelsons perfer?

and what spring combos, i just got done watching mr. Bs youtube vid

and was jealous how the nelson get so many shots with a lighter hammer, and could use a Red valve and yellow main springs, wondering now what weight would be best, i wouldnt mind trying to cut down some hammers
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Old 06-20-2008, 07:31 AM   #2 (permalink)
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Light hammer with strong valve springs and stronger main spring = good efficiency. I just changed out the springs in my stock Razorback, and I am getting a little more than 50 usable shots with the stock hammer.
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Old 06-20-2008, 07:38 AM   #3 (permalink)
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Quote:
Originally Posted by pump View Post
and what spring combos, i just got done watching mr. Bs youtube vid

and was jealous how the nelson get so many shots with a lighter hammer, and could use a Red valve and yellow main springs, wondering now what weight would be best, i wouldnt mind trying to cut down some hammers
Can you list the link to that video please.
You know that a stock CCI hammer is quite heavy right? And under the right conditions, reports of efficiency in the range of 50+ are common.
Add a Lapco fluted hammer designed by Colin Thompson, and who knows exactly how many shots we would get?
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Old 06-20-2008, 09:02 AM   #4 (permalink)
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There may be a limit on how far you can push that variable. The reason for the better efficiency is that the valve closes faster, and thus lets less gas out. Basically you're lowering your "dwell" like you would on an electro. The biggest factor is that you decrease valve "bounce" (farting sound often associated with snipers).

Also, I am not 100% sure, but I believe that lighter the hammer/stronger valve spring is, the less consistent and more prone to cooling the gun will be. So if you could get 70 shots off of one 12g, you may need to wait 5 seconds between each shot to not notice any velocity loss. (just a fake random example)

Someone on Special ops said that they could get 64 full powered shots on their phantom a while back. Just throwing it out there, I can't remember for the life of me what he changed.

Feel free to correct me, I am no expert.
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Old 06-20-2008, 09:05 AM   #5 (permalink)
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YouTube - From the Attic Ep7 - Nelson paintball gun 12 gram efficiency

seems that its just dwell time that makes for good efficiency when i think of all the guns and valves out there
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Old 06-20-2008, 09:08 AM   #6 (permalink)
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Edit: Damn it, I always leave right before I hit the reply button.

Yeah, it made a huge difference for me. I was getting around 20 usable shots before I changed my springs, and I basically just randomly guessed until I got nice results.
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Old 06-20-2008, 12:04 PM   #7 (permalink)
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I have a LAPCO super light weight fluted hammer coming and I will try it out on a few Nelsons (Nelspot, Phantom, Bushmaster) and post the results. I might even get a dropout for my Phantom (it is currently VSC) to try to push the limit.
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Old 06-20-2008, 01:09 PM   #8 (permalink)
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I was able to get 40ish from a drop-out valved razorback with adjustable guts and small diameter tube as well as stiff springs both places; but can't remeber the chrono speed for that one (14" barreled)

However, I got 30-40 from nelspot at 275fps +/- 5fps by swapping springs and using a #6 powertube with stock internals. Gonna have to get a proper spring kit since all the springs I have are getting weaker (they're old.) And I need to get it up to 280, 290 depending on location (some of the local fields limits at 300, others 290)
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Old 06-20-2008, 01:17 PM   #9 (permalink)
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As noted the way the gas gets into the valve also greatly helps with efficiency. The shorter the path = the less expansion = greater efficiency especially with 12 grams. Drop out valves have the shortest path between source and valve at least with the phantoms.

I would love to see a bucket style changer that threads on to the valve so that it's straight off the valve with out using the asa portion. That would be very interesting!

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Old 06-20-2008, 01:29 PM   #10 (permalink)
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Quote:
Originally Posted by Schmitti View Post
I would love to see a bucket style changer that threads on to the valve so that it's straight off the valve with out using the asa portion. That would be very interesting!
I agree. I've actually been toying with the idea of basically permanantly attaching a bucket changer to a trracer asa and using some tubing and epoxy internally to devolumize.
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