So bigger element then? On Sat, Mar 5, 2011 at 5:43 PM, Benjamin McCafferty <[email protected]> wrote: > Hey John, > > Have a look at my posts on steam tips about two years ago--I did a similar > experiment on how fast tips would bring water to a certain temp, and also > measured holes sizes and all that to get total hole area. I also watched the > steam pressure gauge to see how the boiler handled the bigger tips. I think > you will change your conclusion, since the boiler pressure drops dramatically > and runs out of gas with bigger tips. Even with smaller tips the boiler > doesn't have enough juice to hold pressure. If the steam wand was the choke > point, you would expect the boiler to hold pressure or build higher pressure, > but it does just the opposite, even with the stock steam arm. > > Still, I'll be interested to see what your experiment yields. > > bmc > > On Mar 5, 2011, at 6:35 AM, John Brinkman wrote: > >> Hi Kitt >> >> I think that it is a pretty well know fact that the Brewtus is down on >> steaming power when compared to other similar machines on the standard >> water heating test. According to the reviews on Home Barista of the >> Brewtus, it is around 33% slower than other machines in the same sort >> of price range, namely La Spaziale VII 1.2mm Tip, Vibiemme Domobar >> Super, Quickmill Andreja Premium or Giotto Premium who all seem to >> take around 28 seconds to raise a 8oz of water from 40 to 160 degrees >> Fahrenheit vs the Brewtus which takes 38 seconds with the two hole tip >> and 60 seconds with the single hole tip. Home Barista even mention in >> the conclusion of their review of the Brewtus "However, both the >> single and two-hole tips fell short of the steaming power one would >> expect from a machine with a dedicated steam boiler." >> >> Now whilst steam speed is not everything and sometimes a bit slower >> makes it easier, there are times when I would appreciate a machine >> that can heat a jug in 28 seconds rather than 60 seconds (like when I >> have to make coffee for the whole family). I have owned both a Brewtus >> III and now Brewtus Rotary for the last 5 years love the machines. I >> did noticed a slight increase in steam performance between the two >> when I upgraded. It is however no where close to what I get from a GS3 >> (haven't taken that step yet, still considering). I know that the >> machines are not in the same price range but I would hope that the >> Brewtus's steam would be slightly better than it is. >> >> I have played around with steam tips using an 8mm to 10mm converter >> and various steam tip. I have found that the machine simply cannot >> deliver enough steam to power a tip with 4 holes properly. I >> believe/hope that it is not because it doesn't have enough steam but I >> suspect rather because the steam arm is restricting the flow of steam >> from the boiler. >> >> My aim is to try changing the arm to a standard arm to see if it can >> drive a 4 hole tip with enough steam to be able to produce microfoam >> (just not possible with current arm). I will also measure the time it >> takes to heat water as a comparison. >> >> JohnB >> >> On Sat, Mar 5, 2011 at 3:27 PM, Kitt Johnson <[email protected]> wrote: >>> John, >>> >>> What are you trying to "overcome" ... i. e., what aspect of steaming with >>> the Brewtus do you see as "limited", and there-by unsatisfactory? (I am >>> guessing that it is the elapsed time required to raise the temperature of 5 >>> oz of whole milk from 44 F to 155 F, but you could be trying to raise 16 oz >>> of milk in a large pitcher or unhappy with the nature of the foam or >>> something else.) >>> >>> Would you mind telling me what (and perhaps how) you plan to measure as a >>> marker of the performance before and after switching wands? Do you plan to >>> use the same wand tip and same boiler pressure (=temperature) in the boiler? >>> >>> Just curious >>> >>> Kitt >>> ----- Original Message ----- From: "John Brinkman" , 2011 7:38 AM >>> Subject: Re: Steam Pressure >>> >>> >>>> I am still convinced that the main limiting factor on the Brewtus >>>> regarding steam delivery is the inside diameter of the "Cool Wand" >>>> steam wand. >>>> >>>> I am planning to replace my cool wand with a standard steam wand, do >>>> some tests and see what the difference is in steam performance. I will >>>> let you guys know what the results are. >>>> >>>> JohnB >>> >>> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Brewtus" group. >> To post to this group, send email to [email protected]. >> To unsubscribe from this group, send email to >> [email protected]. >> For more options, visit this group at >> http://groups.google.com/group/brewtus?hl=en. >> > > -- > You received this message because you are subscribed to the Google Groups > "Brewtus" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/brewtus?hl=en. > >
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