I did a test run on my 2" screw top tin "esbit" type stove with its "combo" stand/windscreen on my patio this evening.
Here are the particulars.
Ambient temperature was 81* F.
Water temperature @ 50* F. (ice cold water from the refrigerator)
7 mph ENE wind (no real effect on patio due to house shielding the stove)
The fuel tablet was lit with a match and allowed to achieve a completely flaming tablet.
The "combo" was then placed around the stove and the "cook pot" with 1 cup of the cold water was placed on top of the "combo".
The timer was then started.
A boil with visible steam venting from under the cook pot lid was achieved at 14 minutes and 36 seconds.
The fuel tablet continued to burn until complete flame out at 34 minutes and 24 seconds.
I believe two 1 cup boils are possible due to the fact that the boil time doubled equals 29 minutes and 12 seconds. The tablet burned for 5 minutes and 12 seconds more than that amount of time.
The "cupped" shape of the stove tin may be part of the reason for the slower boil time than the tray type stove.
This stove, stand and windscreen setup seemed to perform like a simmering stove.
I blew through the "combo" and it seemed to like the added combustion air as the flame seemed to grow and become more vigorous as long as I continued to blow into the "combo" screen/stand.
After flame out there was quite a bit of residual fuel tablet left in the bottom of the tin.
The bottom of the "cook pot" was well coated with soot.
This is to be expected with solid fuel tablet stoves but it wasn't this bad when I test burned the tray type stove.
R & D:
I believe I can speed up (lower) the boil time by adding more punch holes in the "combo".
My darling wife suggested that I try out this new stove at home before going out to the Kisatchie Wilderness without a backup stove. I'm so glad I listened to her and didn't wait until I was on the trail to "test" this stove. ;-)