Engine: Quadra 100 XL
Airplane Aeroworks Edge 540, 36% Scale
Weight: 25Lbs
Gas: BP Super Unleaded 93 Octane
Oil Mixture 40:1 (2/3 Klotz racing, 1/3 Klotz BeNOL (Castor) Oil)
Temperature Low 80s
Humidity: high, some drizzle on and off during the day; overcast

Props: Menz 26x10 Standard, Mejzlik 28x10, Menz 28x10 Standard

1. Menz 26x10 Standard (baseline)

Static RPM
Idle:1200 RPM
High: 6400 (6200 after completion of flight; engine at full operating
temp.)

2. Mejzlik 28x10

Static RPM
Idle: 1100 RPM
High: 5900 RPM

Horizontal flight- approximately the same speed as the 26x10 S. Vertical
up flight slightly faster than the 26x10 S More "pull" across the entire
RPM/throttle range. Not quite as fine of a throttle response as the 26x10
S. More of a "flywheel" feel, possibly due to the slightly higher mass of
this prop as compared to the 26x10 S, which required more throttle stick
movement than with the 26x10 S, especially during torque rolls. Braking
action was approximately the same as the 26x10 S, which was suprising,
considering the larger diameter. We thought it would fly slower and break
more. This was not the case. The looks of the prop are very impressive.
It has a black carbon fiber weave look to it, which is very impressive.
The stiffness is significantly more than the Menz Ultra line, which this
prop most resembles. The prop also makes a neat little whistle while
you're taxiing, going from low to high throttle. It sounds more like a
full scale prop. In the air, the prop sounds very similar to the Menz. No
supersonic tip sound was detected.

3. Menz 28x10 Standard.

Static RPM
Idle: 950 RPM
High: 5400 RPM

Horizontal flight was slower than either the 26x10 S or 28x10 Mejzlik.
Vertical up flight was slower as well, but the prop seemed to "pull" the
same, although the half loop on the top of a verical 8 point had a slower
speed. However, there was absolutely no drop off of rpm or sign of
lugging during extended vertical up which was very impressive. The actual
thrust felt about the same. The engine was definitely not out of the power
band even with such a large prop. The flywheel effect was more than either
the 26x10 S or Mejzlik. We did not try any torque rolls with this prop,
but expect even more of a dropoff of throttle response resolution around
the torque roll than the Mejzlik. Down lines were, suprisingly, about the
same as the other props. Even with the idle down all the way the prop
seemed to break the down lines the same as the other props. This suprised
me a lot because it was expected that with all of the prop area that the
down lines would be extremely slow.

Conclusions: Menz 26x10 Standard and 28x10 Mejzlik were about the same
performance wise, with the Mejzlik having slightly more vertical up pull
and the Menz 26x10 S having slightly better torque rolling capability with
this aircraft/engine combination. Personally, I would rather crash with the
Mejzlik because it would be more spectacular to see all the little black
fibers frayed and mangled- plus it would be neet to see the reputed hollow
insides (had to put something funny in for Branwell).

The Menz 28x10 Standard flew the plane slower in horizontal and vertical
up.

All props had the approximately the same down-line speed for this
engine/plane combination. For those going for looks- the Mejzlik wins
hands down. I plan to stick with the Menz 26x10 Standard (Branwell can
rejoice, since he has already claimed the Mejzik from me).

Note: No high or low speed needle adjustments were made during the tests
since the engine ran solidly on each of the props and adjustments did not
appear to be necessary . Fine tuning with individual props may have
resulted in slightly different rpms and performance. I typically run the
high end on the slightly rich side (with the baseline) and the low end
pretty much right on.

Special thanks to Dave Michael, who did the holding/taching and acted as
the second set of eyes during the evaluations.