Tweet
Neill's Pompeii rotisserie
Building a good sized rotisserie to inside my 40? Pompeii has kept me thinking for some time now. It is one thing to roast a leg of lamb, a beef roast, a couple of chickens etc. in a pan, but to cook a whole lamb or a suckling pig, a half dozen chickens, well, that is another challenge for the Pompeii.
There are/were numerous obstacles to overcome in the design, including:
how to mount the shaft end inside the oven,
how to mount the outside end,
how to drive the shaft at a variable rate,
how to access the fire and the meat with the unit in position,
how to insulate the electrical from the oven heat,
are all to be decided before work can get underway
I got what I thought was a great idea, to drive a 1?ski boat stainless prop shaft though an automotive drive plate sitting on 2 starter motor bendix drives. These would be driven by a 12v variable speed windscreen wiper motor via a small chain. I have all of the bits in my workshop but the 3 drive sprockets (which would be easy but fiddly to make) and made a prototype this afternoon. I got a crankshaft flange from a worn out motor, turned it down, drilled and bored out the centre to fit the shaft diameter, assembled it. I can even use the oil lubrication holes to locate on a pin through the shaft as well as 2 grub securing allen screws. The drive plate can also be assembled once the meat on the shaft is inserted and located on the inside end assembly which is easily made with a pipe bender to the oven inside diameter radius.
It was all coming together very nicely , and when I was almost finished the prototype, I then found the alternative, simpler option, the worm drive. The pars required were laying in my scrap steel bin, directly under my feet.
Both have advantages and disadvantages, each system has the others disadvantages as their advantages
So now it is get cracking whilst I await for the council to approve my patio plans prior to my outdoor kitchen construction.
Neill
There are/were numerous obstacles to overcome in the design, including:
how to mount the shaft end inside the oven,
how to mount the outside end,
how to drive the shaft at a variable rate,
how to access the fire and the meat with the unit in position,
how to insulate the electrical from the oven heat,
are all to be decided before work can get underway
I got what I thought was a great idea, to drive a 1?ski boat stainless prop shaft though an automotive drive plate sitting on 2 starter motor bendix drives. These would be driven by a 12v variable speed windscreen wiper motor via a small chain. I have all of the bits in my workshop but the 3 drive sprockets (which would be easy but fiddly to make) and made a prototype this afternoon. I got a crankshaft flange from a worn out motor, turned it down, drilled and bored out the centre to fit the shaft diameter, assembled it. I can even use the oil lubrication holes to locate on a pin through the shaft as well as 2 grub securing allen screws. The drive plate can also be assembled once the meat on the shaft is inserted and located on the inside end assembly which is easily made with a pipe bender to the oven inside diameter radius.
It was all coming together very nicely , and when I was almost finished the prototype, I then found the alternative, simpler option, the worm drive. The pars required were laying in my scrap steel bin, directly under my feet.
Both have advantages and disadvantages, each system has the others disadvantages as their advantages
So now it is get cracking whilst I await for the council to approve my patio plans prior to my outdoor kitchen construction.
Neill
Comment