All three national organizations offer both stock and
modified engine classes for tunnel hulls like the Top Speed
2. Participation by those new to the hobby of model boating
is possible through club events.
Another good source for information regarding all aspects of
tunnel boat operation is:
http://www.intlwaters.com/
Of course, racing does not have to be an organized and
sanctioned competition to be fun. Small informal races can be
very exciting without the stress that comes with formal events.
Here are some suggestions for setting up a simple race
course for boats:
• Make 2 to 4 simple and inexpensive “marker buoys”
with empty milk jugs, string, and heavy objects for
anchors, similar to the above sketch.
• For “drag racing” place the buoys similar to the
above sketch.
• For “oval racing” place the buoys similar to the above
sketch. Note: The above patterns are not based on any
sort of official standards; therefore, you may set up race
courses any way you desire, using your imagination to
make the races more interesting. Usually the smaller
courses will provide more action and excitement.
The length of the races can be determined by a set number
of laps around the buoys (for example, the first boat to
complete 5 laps is the winner); or by time (for example,
whoever is leading at the end of two minutes is the winner).
FUEL
In April of 2000, designer of the Top Speed 2, Jerry Dunlap,
conducted a comparison test using varying percentages of
nitromethane fuel. Results were obtained running a model
tunnel boat (not the Top Speed 2) with a K&B 3.5ss engine
and an Octura X442 propeller against a radar gun. The only
variable was the percentage of nitromethane in the fuel. The
fuel was of the same brand and lubrication content.
It was found that the percentage of nitromethane in a fuel
affects engine performance.
Nitro %
Top Speed (mph)
10%
37/38
20%
39/40
45%
42
55%
43
65%
44
• The individual running “just for fun” might consider
running lower nitro content. The cost of a gallon of model
engine fuel is proportionate to its level of nitro.
• The use of fuel with a higher content of nitromethane than
the recommendations made by the manufacturer may
void your warranty.
• Using fuel with high levels of nitromethane may
significantly decrease the life of your engine.
RUNNING THE TOP SPEED 2
PLEASE READ these valuable running tips as well as
the “Safety Precautions” at the beginning of this
manual
BEFORE Running the Top Speed 2 to ensure a
successful and safe run.
• NEVER attempt to swim after a stalled or capsized boat!
Wait patiently for the wind currents to return the boat to
shore or use a tennis ball attached to the end of a fishing
rod to retrieve a stalled or capsized boat.
• NEVER threaten wildlife with any R/C vehicle! This is the
quickest way to get R/C boating banned from your favorite
local pond.
PERFORMANCE TIPS
17
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