Water brake dynamometers work by the inertia of the water and viscosity
is not the major influence.  It is the density of the water that is the
major factor.  The design of the fluid coupling in an early Buick
hydraulic trany is more appropriate than the torque converter in a
modern trany.  A water brake dyno is easy to make and direct drive is
better as the higher rpm means greater velocity of the water particles.
The load is controlled by the quantity of water allowed into the water
brake.  The load increases with the rpm squared.  A nice feature of the
water brake is it closely follows the propeller load curve.  I like them
and I have run large electric dynos, eddy current dynos,prony brake
dynos, and water brake dynos.

I currently have a Mazda A12 set up on a Stuska water brake dyno that I
have not yet run.  This is to get some hands on experience with rotary
engines.

Bob Young
Apple Valley, CA

Hey Bob your almost in my neck of the woods.
Let me know when you are ready to run and I'll pop up
there and observe if you don't mind.

Paul Lamar ...No rotor no motor.

The Rotary Engine NewsLetter. Powered by Linux.
ACRE NL web site. http://www.rotaryeng.net
Copyright 1998-2005 All world wide rights reserved.