Aquacraft VS1 User Manual download pdf (Page 17)

The propeller is probably the most important aspect of how

fast your boat goes and or how well it handles. A poor handing,

slow boat can become an instant winner just by using the

right propeller. As a rule of thumb, non-lifting propellers are

best suited for your tunnel hull. Some lifting propellers can

work but typically need to be “re-worked” to make work well

on a Tunnel Hull. For the best overall performance stick with

a low lift propeller like the AquaCraft GrimRacer 40x53 or

AquaCraft GrimRacer 40x52/3. Testing your propeller is best

done with a stop watch. The most important reading is the

time the boat takes to go from buoy one (1) to buoy three

(3) IMPBA and buoys one (1) through ﬁ ve (5) NAMBA. The

second most important time to capture is overall lap speed.

Your boat may sound or look faster with a prop change

but don’t let that fool you. Course timing is the best way to

determine what if any changes your prop change as made.

Rudder Deﬂ ection: Your VS1 needs very little rudder

deﬂ ection to make it around a corner. Obviously your boat will

turn tighter with more rudder defection but the truth is this can

upset the boat in the corners. It is best to have just enough

rudder deﬂ ection to make a nice sweeping corner PLUS just

a tad tighter. To set the amount of rudder deﬂ ection, run your

boat on the race course at half throttle. Adjust the steering

dual rate until the boat makes a nice sweeping corner a few

feet off the buoys. Next: Run the boat at top speed (remember

to lift off the throttle just a little going into the corner) and

drive the course. Add in more dual rate until the boat runs

the course smooth and fast. Give a few more clicks on the

dual rate adjustment. The extra movement might be needed

to get you out of danger in the middle of a race.

VS1 BASIC SETUP PARAMETERS:

Motor Height: .200" Center of the prop shaft to

the bottom of the sponsons

Propeller Thrust Angle: .5° Negative

Hinge Pin Angle: Parallel to the transom

C.G. Range: 7.5" (27%) to 8.6" (31%) from

the back of the sponsons

Prop: 40x52/3 (AQUB9720)

Rudder Deﬂ ection: 1-3/4" left – 1-3/4" right

DRIVING AND RACING TIPS FROM

12-TIME NATIONAL AND

WORLD RACING CHAMPION

MIKE "GRIMRACER" ZABOROWSKI

Your VS1 makes a fantastic Sport Class racing boat. The

VS1 was designed ultra light to take full advantage of low

power stock style motors. The VS1 is fully capable of wining

races against boats with a lot more power.

Grimracer says, “Don’t just drive your VS1 around, drive

your VS1 around something!” To reach the full potential

this boat has to offer, you need to get it on the water running

around the race course. Running your boat on the race

course allows you to build depth perception as well as get to

know the needs of the boat.

The VS1 responds best if you drive it as if you were driving

a car or any other type of wheeled vehicle. Your lap times

will go down if you lift off the throttle and set the boat as you

enter the corner and accelerate out. Driving “white knuckled”

you will likely not be paying attention to your entry point,

losing valuable seconds off your lap time.

If the pond you test at has an elevated driver’s platform,

make sure you stand on it even during testing. Also stand

in multiple locations. This way if you do not get your favorite

spot on race day you will not be surprised by what you

experience. It is also good to take a quick look at the water

and race course before you launch the boat for your heat. If

you see a buoy out of place or an obstacle in the water it’s

best to identify it before you launch the boat.

Starting and launching the boat later in clock time is far

better than starting and launching at the beginning. If your

clock time is 2:30 like most, be warned, if you go out early

you are adding to the seconds your boat can get into trouble.

During the race it’s best to be on the water ONLY as long as

you need to be.

Also have your caller show you the back of the boat before

he or she launches it. Move your rudder back and forth and

make SURE it is working before the boat is launched.

The VS1 was designed for the use of “stock” or “sport”

outboard motors. The ultra light weight of the VS1 and long

ﬂ at section on the sponson bottoms take full advantage of

the lower power stock motors have. We do not recommend

the use of a modiﬁ ed (piped engine) on this hull.

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Aquacraft VS1 User Manual Page 17

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