I looked briefly at the GoSystem Fly a while back but hadn't really tested it as I couldn't get 100g gas cartridges locally which meant a 90 mile round trip to Belfast and Cotswolds. Not wanting or needing to have them meant postponing the test but I recently had the opportunity to test another stove so bit the bullet and got the cartridges.
Initially I hadn't been too impressed with the Fly as although is about 30g lighter than my current cannister top stove it isn't as compact and also as the burner head is wider it doesn't really suit my pots of choice, the 750ml Alpkit MityMug or 550ml Tibetan titanium pot/mug. To try to match the flame to the Mitymug I had to turn the stove right down which resulted in a pretty slow boil time. I do however have the Snow Peak compact cookset and the smaller of the 2 pots pretty much matches the flame spread of the Fly so I gave it a try.
I ran the firt test indoors using a similar procedure to my previous tests, of the C-3 Mini Stove and Jetboil PCSC-3. The water temperature on the C-3 Mini Stove was only 7.2°c however rather than 16.5°c so the Flyhad almost a 10°c advantage to start with.
The performance was pretty good and even allowing for the difference in water and ambient temperature was almost 2 mins faster than the C-3 Mini Stove/Mitymug and with an even better performance over using it with the Mitymug. Interestingly both stoves used almost the same amount of gas at 8-9g. I think illustrates the importance of matching the burner and pot. It also illustrates that the Fly has a bigger Jet as it can deliver the same amount of gas in a much shorter time. Video of indoor test below.
Having tested it indoors I decided to try it outdoors following the same procedure but using a windshield as I would in real world conditions. It wasn't windy but there was a bit of a breeze. Unsurprisingly there was a fair increase in boil time at 4.09 mins but somewhat surprisingly the gas usage didn't increase accordingly as it only use 11g. Video of outdoors test below.
The Fly (ti) suits the Snow Peak pot well and there's plenty of room for a 100g cannister and the stove with space left for additional items. The combined set is pretty compact as although it's wider than the Mitymug set-up it's shorter.
To be honest I hadn't initially been impressed with the Fly but with the Snow Peak pot it's very good indeed and at a combined weight of 220g for stove, pot and basic windshield isn't an awful lot for a gas set-up although I'd still prefer to use meths if at all possible.