Dave I am not picking on you personally, as an "older technology":spin3:
but - let's look at it a couple of ways:
1. I love normally aspirated ( carberator using) engines. Simple, easy to tune, and they work great, up to that point.
Here is the problem tho - they are never going to be as energy efficient as precisely metered fuel injection engines of current manufacturing technology. And the fuel injection systems go further, with less fiddling than a carb.
So - my point is simple: I have used probably more different Beckett;s than amost here ( 3 major manufacturers, 6 different skimmers) - and they work. Period. But - having said that, - from about 20 years of using Becketts, I decided to try a needle wheel job recently. It too works. Better. Measured ANY way you want. Quanity, darkness of skimmate, whatever...just MUCH better.
Understand, I really *do* know how to tune Becketts, improve Becketts, and get the most out of them. And, again they work. But....
2. And this for me is important as the number of systems I am keeping is increasing: You simply cannot get the same performance from a Beckett that you can from a needle wheel skimmer of good design for anywhere near the same amount of electricity.
Again - see my comparitive electrical consumption of the needle wheel - vs - Beckett in my previous post. And I can assure you - that if you think a 8'' x 48'' Beckett is working well using a Iwaki 55 - you really should try it on a Iwaki 100. THEN - you can compare the air to water mix, in density and opacity to what the needle wheel are doing with MUCH less electricity.
The physics of how a Beckett work mandate that - not me. It just requires a much higher pressure rated pump to get my Becketts to "honk".
And - again, they are noisy as compared to the needle wheel. And when you have 5 skimmers in one room...the noise and the electrical draw make the fact that the needle wheel is more efficient, just another point in their favor.
T