My Accucraft gas tanks all have a plate on them saying 'butane only' - however as I always use a 70/30 butane mix I was concerned enough when my Accucraft NA class arrived to check the certificate numbers.I noticed that Accucraft states one of their manuals only to use pure butane and not a mixture because of the risk of overpressuring the storage vessel in the tender.
The first batch of 20 are supposed to be here in a few weeks. (I was initially told late November, but it's getting pretty tight ) One thing you'll want to know -- the C-18 is a gas burner that thinks it's an alcohol burner! Similar to the C-25 and the 7/8ths Forney, the C-18 has a ceramic burner in a fairly open firebox, so the burner cannot create it's own draft like a poker burner can. So when you initially light this off (from the firebox, there is no smokebox door) you'll need to put a fan on the stack just like you would for a coal or alcohol engine. They have equipped the loco with a blower. My understanding is that at about 10 lbs. pressure you've got enough to power the blower -- crack it open and take off the fan. From that point it should get to pop-off pressure pretty quickly, and I THINK you can just turn the blower off.Has anyone gotten one of these C-18s and had a chance to see how it works. I was wondering mostly about lighting it especially in cooler weather. Would love to hear any reports on this and other aspects. Jim