A question for all the "drummers"
I recently started roasting with my BBQ drum, which consisted of a
stainless cannister mounted on a homebrew shaft. I was getting OK
roasts, but they seemed a bit slow, which I attributed to rather slow
heat transfer with a solid drum.
To correct this, I cut out three sections of the sides of the
cannister, and replaced them with perforated stainless mesh. I have
three stirring vanes mounted on the still solid parts of the
cannister. It holds roughly half a pound.
Since this is now perforated, I would expect some similarity to the
behavior of an RK drum, so I started by basing my profiles on what
I've seen others post for RK's, with some improvised adjustments for
the small batch size. The result is rather woody tasting roasts (a
little like I'm chewing on one of those wooden coffee stirrers, with a
little burnt flavor thrown in). The beans I roasted were some Monkey
blend and a Yirg. I know I went too dark for the Yirg, but I didn't
expect such a wood taste from either bean.
I do know I need to nail down the position of my thermocouple tip,
since it moves around a bit, I tried the best I can to keep it roughly
at bean level.
Here is the basic profile I was using (all temps in deg F):
Preheat empty grill to 475 - adjust burners to maintain temp
Drop in loaded drum and start rotation
Adjust heat to a slow ramp to ~500 (took about 5 minutes - not at full
Hit first crack at around ~13 minutes - cut back gas during first crack
First snaps of 2nd were around 15 minutes, pulled, dumped and cooled.
Given the fact that the thermocouple was free to flop around a bit,
I'm not assuming too much regarding the accuracy of the temp readings.
One remarkable difference is that most of the discussions talk about
needing full gas to ramp back up to ~500, whereas I was at 1/2 gas on
all three burners, and it still seemed to go rather fast, I backed it
down even more. I use Weber grill if that makes a difference.
Anybody know of a specific cause for the woody taste? I'll try a
roast later with the thermocouple more secure and see what happens,
but if I there are any suggestions on profile changes, I'd be