Engine: Quadra 75 XL, stock.
Fuel: BP Super Unleaded 93 Octane
Oil: 40:1, with 3/4 Klotz racing oil and 1/4 BenOil Castor
Muffler: stock Quadra muffler, with baffle, two pipes.
Plane: Lanier Laser 200, 1/3 scale, 23Lbs dry.
Weather: 71 degrees, calm, cool dense autumn air!

Props:
Menz 23x10 Ultra (baseline)
Menz 24x10 Standard
Menz 26x10 Standard
(not tried today, but in the past, Zinger 24x10)

Menz 23x10 Ultra
Idle: 1600 RPM
High: 6900 RPM

Perfomance: This was the baseline prop that I have run on the plane for
the last year or so since I've had the plane flying. The plane flew well
at the 96 Masters, getting through the TOC known with ease. Up to this
point, due to time constraints, I had only run this prop and the ZInger
24x10, which I will discuss later. I took the Able muffler off and put the
stock muffler back on. I did not notice any power decrease. The plane was
much quieter and gave the appearance of running much smoother. In fact
several watching had the impression that the plane was flying smoother,
when, in fact, it was just due to the quieter engine.

Menz 24x10 Standard
Idle: 1500 RPM
High: 6400 RPM

Performance: The airplane flew slightly slower in the horizontals.
Vertical was better than with the 23x10 Ultra. Down lines were slightly
slower. Torque rolls were easier to do. The engine seemed to respond
better with this prop, especially around the mid-range. Torque rolls were
at a little over half throttle rather than 3/4 throttle with the Ultra.
When throttle was advanced in a torque roll, the plane jumped vertically
and accelerated much better than with the Ultra. Landing speed was also
slower. No real suprises, as this is the prop that is recommended for the
engine.

Menz 26x10 Standard
Idle: 1300 RPM
High: 5580 RPM

Performance: Horizontal flight and Vertical flight was slightly slower
than the Ultra or 24x10 Standard. Down lines were again slightly slower.
Torque rolls were even easier to do than with the 24x10 Standard.
Acceleration out of torque rolls was not as brisk as the 24x10 Standard,
but more than the 23x10 Ultra. The airplane was most quiet with this prop,
due to the effective muffler and lower flying RPM. Throttle response was
even better than the 24x10 Standard. Overall thrust and general
performance was slightly less, but close to the 24x10 Standard, but with
slower all around flight. This is my pick for this airplane/engine
combination! Landing was as slow as that with my Edge.

Zinger 24x10: Although this prop was not tried on this test, it was the
first prop to run when I got the plane in the air last year. Not knowing
much about props, I picked it up at the hobby shop to get the Laser in the
air. Performance was not as good as the Ultra 23x10. Vertical was not as
good and the prop made a lot of noise. It was kind of a neat noise, like
the tips were going supersonic. I did not hear this sound on any of the
Menz props. The flight speed and landing speed were slower than the 23x10.
Best points were that the prop was the least expensive, and offered a slow
landing speed.

Conclusions: For this plane/engine/prop combination, the 24x10 Menz
Standard produced the best thrust. The 26x10 Menz Standard provided the
best torque roll and slowest, smoothest flying in the test weather
conditions.

I personally prefered the 26x10 Standard in these flight conditions
(suprise).

A big THANKS goes to:

Branwell: did the tach measurements, provided observations.
Chuck Thomas, Charles Kinney: did the recording, provided observations.