'The Scotsman16' date='13 August 2010 - 10:54 AM' timestamp='1281714897' post='226486'
I am not sure why you are saying that hop-up doesn't improve accuracy, when that was one of its purposes... Or is the SCS nub just a scam that 10000 people bought into, and tell all the time about how it makes great differences in accuracy? I dont think so...
I have a KSC that is deadly accurate...I have no idea what the KWA you shot are doing...but all the KSC I have run have no accuracy issues.
Maybe KWA has a different material in their Hop-ups...I never had a KWA...so I do not know. And you have not shot a KSC...so you don't know. Maybe we are both right.
Response to Response:
As for the SCS nub...I am out on that one. TM has no SCS sytem in their AEG's and their hop-up works very well. Madbull came out with the Shark system and people are not finding them that great, they are identical to the SCS System.
For the 10K you think that SCS is all that...I know a 100K that don't think a thing about SCS/Shark and are very happy with their Prom/SystemA/TM hop-ups.
Thing is, SCS in theory is a very sound idea, there are fundamental physical problems that lead me to believe that SCS is more gimmick then actual physical fact.
Here is what I see. SCS nub is designed to match the couture of the bb. However...at what diameter? If it's 6mm...then most bb will be to small and will suffer a single point effect also, albeit on a different scale. This is due to the fact that the radius do not match.
Second issues is the packing. Most SCS are paired with a good packing. Try using a SCS in a stock packing that is hard like vinyl...I bet SCS doesn't work so well then. Notice how everyone adds SCS and a GOOD packing?
Second the packing defeats the concept of SCS...because when you look in the barrel with a packing and SCS nub...what do you see? A straight line, this straight line hampers the SCS nub. It would be very similar in effect to a good packing and a soft nub. Albeit the give will be slightly different, but there is no two point of contact, it will be just one.
Spartan and users of SCS claim that it does this:
What actually reproduces the same effect but on a better scale is a V-Cut packing. When the nub comes it pushes against an internal bar of rubber that has a cut and it splits forming a V.
Sadly SCS does nothing like this, which is what everyone is spewing about 2-points of contact. When in fact SCS looks like this with a SystemA packing:
V-Hop Packing after installation in the same G3 Ho-up unit and with hop- arm engaged.
Granted the underlying effects are different based on the SCS nub versus a regular nub. But, in no way does it center a bb in the barrel after it travels past the hop unit, because the backspin will pull the bb up to ride along the top of the barrel as it travels down the barrel.
As for your accuracy statement. Hop-up in no way can improve accuracy. If your shots are hooking all over and you adjust your hop-up. It will still hook all over. By technical definition there is no effect on accuracy. Turn your gun side ways, what happens? BB is going to curve...adjusting the hop-up in this state will not improve accuracy.
Hop-up only induces an increase amount of level flight and that extra distance of level flight is "perceived" accuracy, because the ball would normally fall to the ground without the back spin.
A majority of the increased performance is not so much the effect of the nub, but rather the packing that one installed with the nub. Again, I ask you to try a rubbery vinyl packing if you disagree versus a stretchy SystemA or Prommy packing which so many people use with the SCS nub.
Hop-up is purely a range modifier because it induces the Magnus Effect on a round ball. Ever hear of the Right Hand Rule? You know stuff from High School Physics. If hop-up was a factor of accuracy...why do real rifles follow RHR ballistic concept instead? You know where induced spin is on the axis of flight not like hop-up which induces spin perpendicular to flight?
Now of the old days of muskets...they shot a spherical ball...not very accurate at long range were they?
That is why the "minnie ball" was invented...round balls are terrible for accuracy.
And my last argument for hop-up is for range is this. What does the manual show for adjust a hop-up? It show you how to get the furthest flight possible on one axis...not two.