Alan
E-xcellent poster
Posts: 234
|
boiler
Dec 15, 2008 14:55:01 GMT
Post by Alan on Dec 15, 2008 14:55:01 GMT
Hi Guys i have finished my 10v which turns over very nicely. However I have made a simple pot boiler 2" by approx 3" long and connected to the engine. However it seems I am unable to generate enough pressure!! The engine will turn for a few revs but then simply stops. until pressure builds up. I have connected both with a short lenght of eight tubing. with no leaks. I am using a blowlamp to boil the water so there is plenty of heat. Any advice would be appreciated Alan
|
|
|
boiler
Dec 15, 2008 14:59:38 GMT
Post by Deleted on Dec 15, 2008 14:59:38 GMT
Hi Alan. First thing I would suspect in a double acting engine like that (I built one once) is steam leaks past the piston: they won't be obvious like a leaky pipe connection. As designed it uses an oil groove, but I increased the slot depth on mine to take packing and it improved it no end. Regards JB
|
|
|
boiler
Dec 15, 2008 15:18:29 GMT
Post by havoc on Dec 15, 2008 15:18:29 GMT
There is enough heat, but does it end up where you want (need!) it? If it goes up the stack it's lost. I don't know how large that 10v is, but a pot of those dimensions doesn't have much heating surface. Maybe add some circulation tubes or porcupine quills.
|
|
|
boiler
Dec 15, 2008 23:57:10 GMT
Post by spamcanman on Dec 15, 2008 23:57:10 GMT
the boiler does not seem big enough as though it's running out of steam, try running very slowly so the boiler can maintain the steam produced.
|
|
|
boiler
Dec 16, 2008 0:01:34 GMT
Post by GWRdriver on Dec 16, 2008 0:01:34 GMT
In addition to the comments already, another problem is a 2x3 boiler doesn't have sufficient steam reserve space and even when forced (aggressively fired) the steam supply is quickly depleted, as you experience. The smallest boiler Stuart sold to demonstrate (as opposed to working) this engine is about 2.5x8 and was fired by a large spirit burner. In this particular case, size does matter.
|
|
Alan
E-xcellent poster
Posts: 234
|
boiler
Dec 21, 2008 18:06:31 GMT
Post by Alan on Dec 21, 2008 18:06:31 GMT
Thank you Gentelmen, your advice is learnt and appreciated
Alan
|
|