On my last post I was having a bit of trouble with and uneven roast with the
smaller 1 and 2 lb loads, although it worked great on a 4lb load.
Well I've been doing a good bit of experimenting. I really want this drum to
roast 1 to 4 lbs. on a standard rotisserie motor 6 rpm's.
But I thought the reason for and uneven roast, might be to slow of and RPM
with a 1lb load, and not getting a good enough mix.
The first thing I did was set up my gear drive motor 50 rpm's and did 1 lb
of El Salvador. Pre heated grill to 450 degrees, this was a suggestion from
Charlie, thanks Charlie. I then loaded the drum, opened the lid on the grill
and installed the drum, closed the lid, temp dropped to 400 degrees. I never
let the heat get to 500 degrees like I did with the 4 lb load. First crack
came at 9 min, quicker then I wanted. Grill still to hot I guess.
Rolling 2nd at 11:30 I dumped the roast at 11:45. and was pleased to see the
roast came out even. One other thing at 50 rpm all the chaff was forced
thru the perforations in the drum, at 6 rpm a good bit of chaff stays in the
drum, causing a chaff shower when you dump it in the cooling tray, and its
actually quite funny to see all that chaff flying in air.
Well back to the R&D. Since I designed the drum to roast 1 to 4 lbs
with the standard $30 rotisserie kit, I went back to the drawing board. so
set my 6 rpm rotisserie motor back up, I now have it set up so I can run
either motor with the only change needed is to slide the drum a bit to
in the grill and lock the collars down.
I run a cold run to see the bean movement. Thanks Ed for that suggestion,
and with the drum level in the
grill, I noticed, with the 2.5" high stirring vanes that the beans fell
from one vane to the other without many beans hitting the radius of the
drum. I also
notice that the beans gathered more to the rear of the drum, not much
but some, so I placed a 1/2" board under one end of the grill, and now the
greens tumble even in the drum.
So I removed the drum and preheated the grill to 450 degrees, and when it
stabilized at 450 I loaded the drum and greens, again the temp dropped to
400 degrees, I did not touch the gas controls and in about 6 min the grill
came up to 450, near 1st crack the beans go exothermic and the temp rises to
465, at the beginning of first crack time 11:00 min. I cut the heat back a
bit and it leveled out at 440 degrees, first crack got going good at 11:30,
never let the temp go beyond 450 from then on, 2nd started
at 13:30 I then cut the heat back to low and let it coast to a finish a
rolling 2nd crack at14:15 I
dumped the roast. The roast was very even and
smelled great, I was pleased to see and even roast Thanks Charlie your
suggestion of keeping the temp
lower for small loads made a big difference and I believe getting the greens
even in the drum, also made a difference. Charlie will be testing one of the
drums next week, I'm anxiously awaiting his test results. I'm sure there
will be some more tweaking to get it better.
Have a great Labor day
Gas Grill Drum Roasting
in Anderson SC