roidan

and also not to deviate from the purpose of this thread which is to document who is the best SUCKER at this very moment....the BBK 650 wins

yeah lor.... alot of designs coming up and will continue to do so even after we leave this world.. probably we may hear purpose-built iwaki needlewheel impellers or needlewheel impeller tunze streams (housed near the base of the skimmer) which run super low wattage with high flow to chop the bubbles fine fine? anyway, there are ingenious ways to make the beckett bubbles finer but even as we say for the conventional beckett bubbles, their bubbles are not pretty far off compared to needlewheels seriously.....to scrutinise every single bubble is akinned to comparing noise levels from a canon 300d and a nikon d70... inspecting pixel by pixel, yes, you can see the differences in noise level....but when you wake up to the practical world of printing in 4R to even 8R or A4 size...you will not be able to tell the pictures apart seriously.... so sometimes we may get carried away at the micro level and forgot to appreciate our systems at the macro level

maybe those staying in landed property can house one in their backyards...lol kidding lah..jokes aside... we should liken the beckett injector like a Mercedes-McLaren engine....every thought and design of the car must be carefully mapped out to bring out the potential of the engine as well as for the engine to serve to its full potential for the car.. if any parts of the car (skimmer) like suspension (downpipes), brakes(housing) cannot fully complement the engine, you will end up with a very problematic car (skimmer).....hehe also the same engine (beckett) use in different cars (designs), you will get different performance also so beckett users do not lose heart...if you have a well designed one...the skimmer will serve you very well

yeah.... in a way you are not wrong also...just isolating the beckett venturi and surrounding air for analysis, all beckett injectors will draw in a similar fashion...but it's all these design parameters in the skimmer itself that will either aid the beckett injector from drawing air the way it should and could or the design may end up bottle-necking the beckett injector from performing the way it should... thus a poorly designed beckett skimmer is actually handicapping the potential of the beckett venturi despite the same beckett injector used in thousands of beckett skimmers everywhere. a 3m high beckett theoretically speaking will have more head pressure for the pump to work on than the 1m high one...so the 1m high one theoretically should push more.....BUT that's provided other variables are kept constant...both same size downtubes...both same injector housing...and so on... but it won't be surprising if, even using the same pump, a well designed 3m high version will suck in more air than the 1m high poorly designed version which handicaps the beckett venturi.....but of coz this is only in terms of air suction in terms of reaction time...the 3m high version will win hands down..hehe

i beg to differ boss..hehe the design of the beckett skimmer itself does play an important role in the airflow....like i said earlier..the sizes of the pipes..the chambers...the back pressure due to the design and other factors... just take the below factor for an example One of the design parameters of this type of skimmer is the length of the injection tube. You can mount the Beckett injector directly on top of the skimmer box, which amounts to having a zero-length injection tube, or you can have a length of rigid PVC or acrylic tubing between the Beckett and the skimmer box. I found that the length of the injector tube significantly affects the amount of air that the skimmer draws. To my surprise, increasing the injector tube length increased the air flow http://www-2.cs.cmu.edu/~cap/raid/skimmers/thoughts/ just take for example the design of downtubes for example....2 similar lengths...one larger diameter, one more narrow.....the rest of the skimmers are identical..but you can have vastly different airflow through them as the diameter of the downtubes affect water flow thru the tubes..which incidentally affects the air suction induced by the water flow and also the diameter of downtubes will have different back pressure on the same pump used... so there are really a lot of factors to consider...

i measure mine at operating position.... which makes me wonder also if the manufacturers give their air flow numbers at operating or full open..... but with the logic that not every user will dial in their airflow valves the same, probably the manufacturers' figures are at full open position so there will not be any discrepancy in air flow and they get sued for providing misleading figures... borrow ah...if i pass by toa payoh next time i call you lor..if u are at home then i run up with the meter lend you but i dunno which block you stay, only know you stay toa payoh... i think those who DIY skimmers should get their hands on a flowmeter so that they know if their air flow is far off from those manufactured ones...if you are close means the design is sound and ok....if far off from the figures means there is something wrong with the design and you can R&D till you get near the ballpark figures

anyway, upon viewing the list....i would like to think that the BBK300 is quite a value for money needlewheel because the AP1003 is more expensive for BBK300 users out there....enjoy your skimmers, you have just edged AP1003 triple 1260 powered needlewheels by 200 l/hr

a non-SRC reefer counterpart got it for me... how much? not sure, he hasn't billed me yet but i am sure $100 still got change..hehe

no lah..since i am running in dual beckett mode now....it still sucks less air than the BBK 650 (my 3600l/hr vs 4000l/hr) so the BBK still rules over me in terms of air suction, for model 650 at least which the external model costs just under EURO 5k according to their catalogue i think it's time to roll in the RK2s for comparison

ya...flown in from the states...hehe i am running in dual beckett mode currently mah... so i see 1800l/hr of air ###### in through each injector so dual beckett mode is 1800l/hr x 2 lor each airline to each flowmeter but hor..must remember this flow is achieved from mx100 pushing through 2 injectors....and even if use the same mx100 to push through another dual beckett skimmer...air flow suction may differ alot also...do to tonnes of factors in the skimmer design...like size of downtubes..size of chamber...size of beckett housings....tooo many factors to consider that will affect airflow despite a same pump pushing through them... well, as you can see from the list....it is of no coincidence that that higher range skimmers from deltec or BBK suck in more air than their lower models...hehe more air flow means more expensive, along with other factors of coz....

AP 850 600l/hr BBK 200 1000l/hr AP 902 1200l/hr AP 702 1400l/hr BBK 250 1500l/hr AP 1003 1800l/hr BBK 300 2000l/hr AP 703 2100/hr AP 1004 2400l/hr BBK 400 2500l/hr BBK 500 3000l/hr AP 1006 3600l/hr = Roidan's Quattro in dual-mode 3600l/hr BBK 650 4000l/hr Roidan's Quattro in quattro mode 7200l/hr just air suction comparison, BBK and deltec air flow taken from manufacturer's catalogue

here is the air suction of my beckett injector, running in dual beckett mode with mx100 30litres of air / min which means 1800 litres/hr on each beckett injector 1800 l/hr x 2 (dual beckett mode) = 3600 l/hr of air 1800 l/hr x 4 (quattro mode) = 7200 l/hr of air phew......

dunno which fairy tale this is from... but very lovey dovey

tokyo tower from the hotel lift lobby on 14th floor very dark at night so i used ISO3200 (H) to force this shot there is a disc shape object in the sky....dun worry, not UFO...just a reflection of a lobby light behind me on the window

i must say the japs are really good with flowers

rows and rows of flowers

dunno what bird this is..hehehe

Chihuahuas

a wide angled view of the castle....really stands out amongst the darkness

my room when i was at The Westin, Nagoya Castle can see the Nagoya Castle from my window..hehe

thanks guys.... AT, i feel like going back again too during cherry blossom season like tanzy did some time back.......hehe wolfie, i am using canon 20d with a sigma 18-125mm f3.5-f5.6 lens http://www.dpreview.com/reviews/canoneos20d/ http://www.dpreview.com/reviews/canoneos20d/page2.asp everything has to be composed through the viewfinder instead of the LCD screen so it took me some adjustment to get used to the camera before i made the trip...hehe penyu, not a pro lah ...just so happen to pick up interest in photography recently since i couldn't add more fishes or corals to my system ....so it's basically maintaining what i have in my reef which is becoming kinda routine and boring and trying to find excitement in capturing moments of the world around me through my camera instead here's spiderman

sakura next year march/april then got leh.... maybe next year fly there do that stupid para para sakura under the cherry blossoms heeee

9 days without getting near a computer...lol 9 days without seeing my marine stuff.... here's a WRX for you, lvcap

bro lightningstrike is somewhere in the centre of the map...hehe but he is coming back to singapore today...lol

dun you think this shot got a *Xmas card* kind of look? hehehe