Ryan: Do you suppose certain inverted canister stoves may perform better at subzero temps than others? In other words, is it possible to test different inverted canister stoves in subzero conditions before we relegate the champ to the white gas stove?
I guess I ask this question out of recent experience I had in Colorado during their record breaking season cold. While camped in the Indian Peaks Wilderness at somewhere in the range of -10 to -15 degrees F, we ran a Primus Spider Express and a Kovea Spider inverted side by side. While I own both stoves and they perform very similarly in above zero conditions (experience, not tests), they clearly did not perform equally in subzero temps. The Primus acted like it was sitting in my kitchen at home, able to melt Kryptonite while the Kovea flame quality diminished rapidly. I did swap canisters between the two stoves, if someone were to wonder.
I fully realize there could be other factors at play here, such as stove malfunction (but the Kovea did run fine once returned home to more rational temps) and other issues I may not be aware of. I also realize you science guys may take my lunch and shovel me some bologna, but oh well, I guess if a guy sees a UFO, then he is a believer.
I appreciate your work on this subject and enjoyed the read.