http://www.aerocharger.com/

Ed Carver  brought by his Aerocharger on a recent visit to the hangar.

Somehow I missed the fact all these years that is was a variable vane turbo.
Apparently a well kept secret in the turbo charger world.
How I missed this fact I will never know. Perhaps they have good patents and
nobody wants to talk it up. If it works as claimed it will put all the other
turbo guys out of biz.

This unit is ideal for turbo charging an aircraft engine as you can slow the
prop RPM with higher prop pitch and boost the HP at that RPM with the
variable vanes.

It is also ideal for turbo compound.

The convoluted design of the turbine housing leads to a cooler exhaust
impinging on the vanes and the turbine wheel. The bearing oil supply is also
self contained. No engine oil required. One could probably use turbine oil
and have a separate oil cooler system if necessary.

This is a very innovated unit indeed.

"VATN is a series of variable-vanes that optimize the flow area of the
turbine by adapting to the exhaust gases. By doing this, the turbine wheel
is able to operate at peak efficiency throughout a wide RPM range, something
that has never been achieved before. This also eliminates the need for a
wastegate, which conventional turbochargers rely upon to control boost.
Instead, the vanes automatically adjust the flow area and backpressure to
perfectly match the torque requirements of the compressor wheel to produce
the desired boost.
Eliminating the need for a wastgate means eliminating extra cost in your
turbo system"



Paul Lamar

Paul,

I tested one of these on a Mercedes 300d back in the Eighties. The variable
geometry aspect worked as promised, largely eliminating the turbo lag when
started from a standing start. However, the thing failed within 1000 miles.
I'm not sure if the failure was caused by the unit's unusual cantilevered
design, it's closed lubrication system, or some fluke, but I don't believe
that the Aerocharger was ever adopted for production by anybody.

Csaba