Many years I built a locomotive that was supposed to run on steam. The boiler drove me nuts, fix one leak and another appears. Finally I decided that this is not fun anymore and ran the locomotive on compressed air. Runs great, but is a show piece on a shelf .
Several months ago I decided to build Rudy K tractor. I started with the boiler. 1-1/2" copper pipe and bronze for the heads.
First try held water but I did not do a hydro test because the boiler looked lousy to me. The water tubes are external and they were the problem. Water tubes were so bent up that I started over again. I used this boiler to experiment. I found a better way to install the tubes. Second boiler held water so I did a hydro test. Water tubes held , backhead leaked immediately . I cleaned the joint and tried again, failure. I decided to cut the backhead off and examine it. I immediately saw what I had done wrong.
I use Harris black flux for hard solder. I use Castrol tapping fluid for tap and threading parts. The Castrol was put in a pill bottle , it is black and looks the same as my flux.
Both are in pill bottles and look the same. I felt like an idiot and made a third boiler. Tapping fluid is a lousy flux as I found out. Made third boiler. Tested 60lbs. pressure and held for 30 minutes. Boiler runs at 30 lbs pressure when running.
This boiler passed the hydro test, I took the wife out to dinner to celebrate.
I rarely give up when a part is made wrong. Proof of this is a box full of " experimental " parts.
Now I am making gears for this tractor. Total of 9 gears. This the first time making gears. First five are made and mesh well. I make two sets of gears, first set in Acetal. Lot cheaper than brass. If all goes well the second set will be brass. So far so good.
Not perfection , but well satisfied so far.
mike
Several months ago I decided to build Rudy K tractor. I started with the boiler. 1-1/2" copper pipe and bronze for the heads.
First try held water but I did not do a hydro test because the boiler looked lousy to me. The water tubes are external and they were the problem. Water tubes were so bent up that I started over again. I used this boiler to experiment. I found a better way to install the tubes. Second boiler held water so I did a hydro test. Water tubes held , backhead leaked immediately . I cleaned the joint and tried again, failure. I decided to cut the backhead off and examine it. I immediately saw what I had done wrong.
I use Harris black flux for hard solder. I use Castrol tapping fluid for tap and threading parts. The Castrol was put in a pill bottle , it is black and looks the same as my flux.
Both are in pill bottles and look the same. I felt like an idiot and made a third boiler. Tapping fluid is a lousy flux as I found out. Made third boiler. Tested 60lbs. pressure and held for 30 minutes. Boiler runs at 30 lbs pressure when running.
This boiler passed the hydro test, I took the wife out to dinner to celebrate.
I rarely give up when a part is made wrong. Proof of this is a box full of " experimental " parts.
Now I am making gears for this tractor. Total of 9 gears. This the first time making gears. First five are made and mesh well. I make two sets of gears, first set in Acetal. Lot cheaper than brass. If all goes well the second set will be brass. So far so good.
Not perfection , but well satisfied so far.
mike