Sure TomG

Lotsa info on the link below.

http://peswiki.com/index.php/Directory:Cavitation_Heaters

I also wrote up a brief discription of how I built it under the thread Frenette-Heater  (Page 2 This site)

No where did I find the specks for the size or depth of holes to drill in the rotor so I just went with 1/2 inch dia. and approx. 3/4 inch deep, spaced 18 degrees apart and 15 degrees angled off center of shaft.
If possable build a furnace and burner as I did and turn a lawnmower into a rotor and end caps.  You won't have time to mow the grass anyway once ya get started on this project. 

As for the 5" diameter x 5" thick alumininum billet, and a 5" diameter cast iron pipe that sounds a little small for what you want to do with it. Another thing to think about is that the Griggs heater is not really a pump for circulating fluids and if you could incorperate a pump inside the unit then you would have a great machine. You'll notice that I machined slots (5 degree angle) across the face of my rotor thinking that it would work as a pump.(Doesn't work that well.) I'm in the process of mounting the motor, heater and Nissan power steering pump (for circulation) inside a gutted out 10,000 BTU air conditioner and using only the condenser for heat supply (Hope it works)
You're lucky to have a machine shop at you're disposal and I wish you all the luck in building a Griggs heater. Keep us informed how you're doin.

Regards
Dave

PS  Here's a pic. of my hot water tank furnace, and burner (6"x9" melting pot = 20lbs.alunimun

@CompCyber

Manufacturer say:
Not only does the temperature of the water increase, but the ambient air
temperture does as well.  The air in the room will increase at approximately
1/10 of a degree every five minutes.


This is not seriosly !!!

This will say 1 ?C  near ONE Hour !!!?

This is for 1 liter  ? 50 liter Bath  or 5000 Liter Swimming pool ?

The ambient air to heat

for  an living room ? an hall?

how good must all be "insulated" ??

how many watts wil go in the pump ?

The heat of "pump-motor" will als heat the water up....


I belive "not so effective heater"

G.P

Thanks Dave,
It is a start. Guess I will do a little more research. Got a couple of ideas but not a whole lot of materials. I might be able to stack a bunch of one inch alumininum plates and make it larger diameter like 12 inches. It would be easier to machine as each segment would be 1 inch thick x 12 inches diameter so I could do 6 seperate segments instead of trying to find (and afford) a solid one piece of material. The trick maybe finding a 12 inch steel pipe to put it all in. As soon as I get going I will post pictures and results.

Thanks,
TomG

@ Whitebird

Hope this photo answers some of your questions.

@ TomG

How's your project coming along. I'll post a pic of what I'm up too later

Dave

Hello pese,

don't have detailed specifications about this "thermowave"-unit; i think, the most simple way is just to buy one and then "re-engineer" it ... for the seriously interested people, $12.50 isn't to much money ... for a commercial available cavitational heater ...

Tried to buy one, but they're only shipping to the U.S., not to Germany