Not subject to
More stable than
Jet Skis and other
- or -
by Phone, Fax, or Mail
6 - 17 x 22 inch
Outboard-Powered Fast Fun On The
You Build it from Plans
"It springs to life and screams across the
water's surface at 40 mph,
feeling more like a jet fighter than a water machine."
Popular Mechanics Magazine
rest, HydroRunner sits low in the water like a Cheetah poised in deep
grass. Squeeze off a handful of throttle and she leaps onto plane and
skims across the water at 40 mph. On plane, the
modified tunnel-hull design gives a sure-footed stability that is
unmatched by PWCs with conventional vee hulls. Stability comes mainly
from the super-wide beam, which is somewhat camouflaged by
her patented tri-hull design. In reality, HydroRunner's hull is about
half as wide as it is long.
conventional personal watercraft, HydroRunner does not heel into
turns. Instead, she turns flat, more like a hydroplane. For a quick
turn, back off on the throttle, crank the handlebars to one side, then
apply full throttle. HydroRunner will swap ends and head
off in the opposite direction almost within her own length. At high speeds, wake is
normally taken with a giant, airborne leap. But hit a wake at speed on the down side of a
jump and she'll go straight through it, rather than over it.
can come from any
short-shaft outboard of 20 to 35 horsepower. The throttle lever
is a standard bicycle brake lever attached by a cable to the engine's throttle mechanism.
Releasing the throttle lever returns the engine to idle. A standard shut-off lanyard is
attached to the rider's life jacket so the engine will immediately stop in the event of an
unexpected departure from cockpit. (This is not a theory. It
has actually been tested, and HydroRunner comes to rest 2 to 3 meters
from the rider.)
Most of the expense of building her is in the cost of the engine. New, the engine can
run $3,000 or more. A used engine can be purchased for $600 - $800. Figure another $500 -
$700 for enough plywood, fiberglass, and fixtures to finish the craft. HydroRunner is made
primarily of 1/2-inch and 1/4-inch plywood, which is then covered with a layup of
fiberglass. Most of the fixtures are standard boat items.
HydroRunner was featured in Popular Mechanics magazine, August 1988.
Length: 105-1/2 inch
Width: 54 inch
Height: 26-1/2 inch
Empty Weight: 350 lbs
Engine: 25 hp to 35 hp short-shaft outboard
Top Speed: 45 mph
Construction: Fiberglass reinforced with wood monocoque
Build Time: 125-150 hours
To Order Plans
Fax or Mail: Use the online Order Form to
automatically calculate shipping charges and provide a total amount. Click on
the "Order HydroRunner Plans" link above, then press "Add Item to Cart."
Fill in your shipping information. You cannot proceed to the
Confirmation Page (for freight calculations) without making entries in the credit card fields. If you
prefer to enter your credit
card information later, simply enter a series of spaces in the Credit card
fields then press "Proceed to Confirmation." Print the
Confirmation Page and enter any missing information.
mail your confirmation page to us, along with your check, money order, or credit card
information. (Outside the U.S., please make payment in U.S. funds
using a credit card or International Money Order.)
Shipments to U.S. destinations go by First Class or Priority Mail
Shipments to destinations outside the U.S. go by mail.
Arizona residents, add 7.1% sales tax.
Robert Q. Riley Enterprises, LLC.
P.O. Box 14465
Phoenix, AZ 85063-4465
24-Hour Secured Fax Order Line: 623-872-3476
Toll-Free Order-Line: 1-800-230-2855
Technical Questions: 623-872-8010
Copyright Robert Q. Riley Enterprises, LLC.
P.O. Box 14465, Phoenix, AZ 85063-4465
All rights reserved.