We are getting ready to test some of the components
of a turbo compound engine. What we plan to do
is install a gear box on a turbo charger mounted
on an engine and connect the output of the gear box
to a generator to act as a turbo charger dyno if
you will. We want to make sure the gear box works.
We will also instrument the turbo charger
for TIT and RPM.

The air output of the compressor will
be connected to a valve to simulate the intake
system. In other words the engine will not
be turbo charged. We are merely using a normally
aspirated engine to drive the turbo charger.

This is done to prevent a turbo charger
turbine or bearing failure from generating scrap
aluminum that will find its way into the engine.
We don't want to be overhauling the engine
every time a turbo charger fails.

My problem is: what do I use for a generator
that will handle 50 HP or 37 KW.
Also what do I use for a load.
I could use 37 one KW electric room heaters.

Anybody have any ideas?

Paul Lamar

3 phase motors can work for that. They come in all sizes. It will
require one of the 3 coil wires to be wired to your circuit box to
excite it to generate the output of electricity. Then you can do
whatever you want with the output current from the other two leads.

 I am pretty sure you will not be able to sell your generated juice
back into the grid unless you get some panels for your roof, or a wind
generator, and get into the wacko bureaucratic enviro scam that allows
you to sell it to the rest of us. Just don't tell'em you are using
hydrocarbons to move the electrons.

 The 3 phase motor output can be used as a dyno simply by measuring
current. I don't know the formula for that.

 The MoTec guys used a 200hp  water dyno in their shop in Huntington
Beach for testing. I think you know how that works. The tank was'nt very
 big, and yes, a couple used radiators should get rid of the heat.

 I don't know your locale. Some states will be happy to let you plug
into the grid. It's cheaper for them to get it from you than to buy it
from another state, like cali.

 Of course, you know, it don't know the difference if you just plug it
in and give it to them, bypassing your meter, I would'nt suggest running
 your meter backwards, would I?

 If you don't have an old meter laying around, I can send you one. An
amp clamp should do what you need anyway. Many electricians have old
meters laying around.


Ed Carver

Sounds like a can of worms Ed. I think we will go with heating
elements if we go the generator route.

Paul Lamar


Don't concern yourself about phasing or synchonizing or load. That's all a
bunch of bunk from the power companies to get your money. Just use some
battery jumper cables and full power ahead. :-)

Nuf said to prove a point.

Bruce.