hamster wrote:Tangled Metal wrote: By the end of our last holiday We'd fill it up and without lighting it the burner emptied to half full in about 20 seconds. We use it as per Trangia' s instructions. Let it cool between refills, didn't seal it up until fully cooled, etc. IMHO another poor quality Trangia part.
The burner's fuel level falls after filling as the fuel flows to fill the double walled area between the inner and outer. That's normal and not fuel loss at all.
Not what's happening. We fill it then top it up again so the well is also filled. It then drops quickly to the same level. It happens if lit or unlit.
The other thing is this drop is different from the initial behaviour. The total burn time dropped considerably at the same time this drop off started. Initially the Trangia burner lasted a decent time between refills. Then we started to realise that we were going through meths too quickly. This was a burner behaviour change that was clear. We looked into it and realised it had to be leaking somehow.
To give you an idea of the issue. We got to the campsite for first night then a second campsite the second night. We had used up nearly 1 litre of meths. So we got a 500ml bottle of meths, possibly 2 bottles I forget now. Next day we moved to a new campsite then another site and another site after that. Running low so another 500ml. Got back to the second campsite again and another 500ml bottle of meths.
I've used different types of.meths burners and know what the low calorific value of meths can give out. I've used other Trangia burners before as well. This newer burner is using meths quick, beyond what should happen.
The initial migration into the double wall happens then topping up again to just below the rim of the central well. This is as much meths as the burner can take because of the topping up after the filing of the double wall chamber. In.front of our eyes this meths drops. This is not migration to the pre-filled internal chamber.
I've heard of these burners forming pinholes in the seams of the burner if you screw the lid on without it cooling. We were aware of this and always leave the burner for some time. Usually a good 10 to 20 minutes. It is unlikely to be a case of this pinhole formation. It was a cool, wet day when it first started so would have cooled very quickly so unlikely to be the cause.