"New" Roasters Guild Forum

[farmroast]

There is a New Roasters Guild Forum.
Only members(around 400 members) can post but non-members can view.

The Roasters Guild (part of SCAA) used to have a public and a members forum. Only members could view or post to the members site but non-members could view and post the public site. The public site was generally newer shops asking about bag sealers, cleaning pipes,etc. Any roasting,technique,roaster discussions were pretty basic.
They are now making an attempt at a new forum and a few primer posts have gone up. I hope they can get some activity with the pros and the smaller shops.
If we find something interesting we can always discuss it here.
There's one started in heat transfer section on drum speed
View Guild

[chang00]

Faster drum speed produces roast with more fluid bed like flavor, ie brighter taste, due to less contact time of beans to the drum and more air flow around the bean with more agitation. Slower drum speed produces roast with more body. Too slow of drum speed tends to tip the beans. However, if drum speed is too fast, centrifugal force overcomes the bean mass effect, and will then produces more tipping. Larger circumference drum can use slower drum speed, due to longer arc length, and smaller drum the opposite.

The drum speed, damper, and heat should all be taken into account. For example, the drum speed can be faster, and the heat higher. Or the drum speed can be slower, the heat lower, and open the damper less.