HomeRoast Digest


Topic: Alp drum dimensions? (12 msgs / 247 lines)
1) From: David Westebbe
Can anybody tell me the approx. length and diameter of the drum in an
Alpenrost?  I'm thinking of making a drum roaster, and was wondering what
size drum is needed for 1/2 pound batches.
homeroast mailing listhttp://lists.sweetmarias.com/mailman/listinfo/homeroast

2) From: Dan Bollinger
I read somewhere that in general good tumbling action in process drums is to
load them to 1/6th volume.  Dan
<Snip>
homeroast mailing listhttp://lists.sweetmarias.com/mailman/listinfo/homeroast

3) From: floyd burton
Dan-this is something I too have been curious about-er what is the formula
for determining vol in a drum.  Been a long time since I worked on problems
like this at PU.
Thanks

4) From: Oaxaca Charlie
--- floyd burton  wrote:
<Snip>
 Whatever the formula is, I'm still getting great results every
day filling mine to 1/3 volume. It finishes about 2/3 full.
Heavy solid metal drums probably need the *formula* to operate
properly-because of time needed to heat both drum and bean mass,
and because of conductive heat from a solid drum being a very
important factor in controlling the roast. Very perferated drums
like Jim G.'s, SS waste baskets, and SS mesh drums like mine
seem to work on a different principle as long as agitation is
good and heating and cooling down the roast are quickly
controllable. If you use an open funnel on the end of the drum
for loading and unloading as some do, then a limiting factor is
how far up the drum the expanded roasting beans go, keeping in
mind that they climb a ways up one side when rotating. 
Charlie
=====
Do you Yahoo!?
Yahoo! Mail Plus - Powerful. Affordable. Sign up now.http://lists.sweetmarias.com/mailman/listinfo/homeroast">http://mailplus.yahoo.comhomeroast mailing listhttp://lists.sweetmarias.com/mailman/listinfo/homeroast

5) From: floyd burton

6) From: Bob Trancho
David,
The drum is @ 9 3/4" long overall by 4 3/4" in diameter 
The straight cylinder portion is @ 6 3/4" long
The open cone-shaped end piece is @ 2 3/4" long and tapers to 3 5/16" at
the mouth
The closed end is @ 1" long and tapers to @ 4" in diameter
Bob Trancho
<Snip>
homeroast mailing listhttp://lists.sweetmarias.com/mailman/listinfo/homeroast

7) From: Dan Bollinger
<Snip>
problems
<Snip>
LOL!   They'd kick you out of Phi Beta Kappa if they heard you now!  ;)
Simple, Area of the circle times the height of the cylinder.  Or,
Pi*radius*radius*height=volume  (where * means to multiply)
1/2 pounds of beans is about 32 cubic inches.  A drum 6 times that volume
would be about 6" diameter and 6" high.  Or, 8" high and 5.5" diameter.
Or....   You get the idea.  Like O'Charlie said, you can probably overload
this drum to one pound and be OK.  Dan
homeroast mailing listhttp://lists.sweetmarias.com/mailman/listinfo/homeroast

8) From: James Gundlach
 It has been several decades since I've had to recall this but I think it is pi*r-squared * h.  
Where pi is 3.14-something r is half the diameter of your drum and h is height, or in this case the 
length of the drum.
Jim gundlach
On Tuesday, February 04, 2003, at 02:20PM, floyd burton  wrote:
<Snip>
homeroast mailing listhttp://lists.sweetmarias.com/mailman/listinfo/homeroast

9) From: floyd burton

10) From: Oaxaca Charlie
--- Dan Bollinger  wrote:
<Snip>
 
  I hope I got something right. I was thinking maybe there was a
 roast masters' formula for determining how much of drum volume
to fill with coffee. Didn't even think that maybe Floyd was just
asking how to determine cylinder volume in cubic inches. 
Charlie
=====
Do you Yahoo!?
Yahoo! Mail Plus - Powerful. Affordable. Sign up now.http://lists.sweetmarias.com/mailman/listinfo/homeroast">http://mailplus.yahoo.comhomeroast mailing listhttp://lists.sweetmarias.com/mailman/listinfo/homeroast

11) From: Dave Huddle
David,
Total length is ~250 mm, diameter of perforated portion is 120 mm.
Perfd. part of cylinder is 143 mm.  Open end taper is 60 mm long, close end 
taper is 30 mm long.
So the roasting volume (perforated portion of cylinder) is about 143 x 60 x 60 x 
pi mm^3, less a bit for the vanes.
Dave	Westerville, OH
<Snip>
homeroast mailing listhttp://lists.sweetmarias.com/mailman/listinfo/homeroast

12) From: AlChemist John
Sometime around 11:59 2/4/2003, David Westebbe typed:
<Snip>
This is not the Alpenroast drum size but from my own size research, 6" dia 
x 6" long should work well.  Actually, it should take 12 or so oz.
<Snip>
--
John Nanci 
AlChemist at large
Roasting and Blending by Gestalt
homeroast mailing listhttp://lists.sweetmarias.com/mailman/listinfo/homeroast


HomeRoast Digest