Very weird thing happened today, while testing my internally fired mamod i discovered a few minor problems but thanks to the help of other 16mm modelers they are now sorted however i discovered that when the burner, gas tank and gas jet are taken out of the loco and set up the gas flows fine but the burner will not work even though gas is coming out of it it wont light! when we put the burner etc back in the loco and fired it up it worked perfectly (if a bit to perfectly as I think flames burnt a rubber seal on the reverser block which is causing a steam leak, i will turn the gas down next time!) any ideas why this was happening? it doesn't really matter as the loco steams well its just something i found quite confusing. I guess that's mamods for you but at least it works well in the loco
cheers
Joe
Confusing burner???
Confusing burner???
Steam is highly under rated
Burners that are fitted to interanally fired locos wont work outside the boiler. This is because the flame is kept on the burner by the boiler tube (im sure there is a very scientific reasons why but this is what I was told). I have only ever seen one other internally fired mamod, all the others are externally fired.
Dan,
James: "Dan, can you use your hearing and tell me if that trains coming ?"
DLR
www.freewebs.com/dlrail
James: "Dan, can you use your hearing and tell me if that trains coming ?"
DLR
www.freewebs.com/dlrail
- mikewakefielduk@btinterne
- Fireman
- Posts: 309
- Joined: Wed Nov 28, 2012 1:43 pm
- Location: Shropshire
Internally fired boilers are more efficient than externally fired ones as, being surrounded by water there's a greater heating surface. Even so they're not great compared with a multi-tubed boiler but frankly it rarely matters assuming the design of the external pot boiler has an effective heat shield. Not always the case with some Mamods as owners found when the tank decals started to melt and the paint blister.
As for why the internal burner won't light, as already said, its the gas to air mix. If you look at many Accucraft locos you'll see two small holes where the burner goes into the boiler. One is for the steam pipe and the other for secondary air. If you block the second hole the loco won't light properly.
As for why the internal burner won't light, as already said, its the gas to air mix. If you look at many Accucraft locos you'll see two small holes where the burner goes into the boiler. One is for the steam pipe and the other for secondary air. If you block the second hole the loco won't light properly.
Who is online
Users browsing this forum: No registered users and 1 guest