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Length: 19-7/8 in. Beam: 7-3/8 in.
Thank you for purchasing this Vac-U-Cracker 1/10 Scale Crackerbox kit. You will find the
quality, fit, and finish of this High Impact Polystyrene model to be superior to other kits.
The Vac-U-Cracker
along the West Coast of the United States. These include a scale Chevy V-8 properly oriented
in the engine compartment and realistic drivers with scale helmets. The exterior hardware is
constructed of stainless steel including the "double shark-fin" turn fin, rudder blade, and trim
tabs. Inside you will find a strong aluminum motor mount that will not flex under load, an
mahogany transom reinforcement, ribbed hull & deck reinforcing liners that resists flexing and
twisting giving the hull the rigidity of a fiberglass model. The hull reinforcement has formed
"beds" for the motor mount base, turn fin, and the pass-through for the stern tube. The design
minimizes hull impact flexing and motor torque-induced roll to the hull floor. The drive train is
complete including a stainless steel shaft supported by Oilite
supporting thick-walled brass stern tube. An Octura
injection-molded rudder assembly includes a stainless steel rudder blade that swings up on
impact reducing the risk of damage to the rudder components. A stainless steel pushrod and
®
DuBro
EZ-Connector are included. The rudder base is designed to fit next to the included Bru
®
Pushrod Seal. The open interior hull floor layout allows you to place your hardware
-Line
where you wish in order to adjust the center of gravity according to racing conditions. You
also get a 60-yard roll of Hatch Tape and building supplies including paper clips, ratchet
clamps, epoxy brush, & a transom clamping board.
Buy as much of the kit as you wish. The "Plastic-Only Kit" includes only the vacuum-
formed plastic, transom reinforcement, and the building supplies. Four hardware packages are
available separately. The "Complete Kit" includes all hardware packages. You supply your
choice of R.O.A.R. motor, radio gear, battery, and speed control.
Regulated by the IMPBA, International Model Power Boat Association, the Crackerbox is a
Specialized N-1 MONO class as a scale model of the full-sized APBA, American Power Boat
Association, one design runabout.
The Crackerbox is not an easy ride. Even with the power limitations of a R.O.A.R. motor,
the hull is almost over-powered. You cannot just give it the gas and expect to cross the finish
line. It takes a good eye, easy touch, and careful use of the throttle just to remain upright
through a complete race! A recovery system for overturned boats is required. This boat is easy
on the budget as well. You won't need exotic electronics to run this boat. The skill of the
driver determines who crosses the finish line first.
features exterior details true to the actual Crackerbox racers found
™
Vac-U-Cracker
1/10 Scale Crackerbox
Model Kit
For Radio Control
Manufactured by Vac-U-Boat
1259 Humphries Rd.
Conyers, GA 30012
philpace@vac-u-boat.com
®
sleeve bearings in a self-
®
X-431 racing prop is included. The
© 2005-2011 Philip Pace dba Vac-U-Boat™
™
™
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Summary of Contents for Vac-U-Boat Vac-U-Cracker
- Page 1 Conyers, GA 30012 philpace@vac-u-boat.com Length: 19-7/8 in. Beam: 7-3/8 in. Thank you for purchasing this Vac-U-Cracker 1/10 Scale Crackerbox kit. You will find the quality, fit, and finish of this High Impact Polystyrene model to be superior to other kits. The Vac-U-Cracker features exterior details true to the actual Crackerbox racers found ™...
- Page 2 If you bought this direct from Vac-U-Boat, I’ll reimburse you for standard return shipping. If you need some help, find a local boat club to join, check with the hobby shop where you purchased your motor and radio gear, or contact internet clubs and organizations for assistance.
- Page 3 INSTRUCTIONS Finally, we are ready to get started building this Vac-U-Cracker. Follow the numbered photos and captions to assemble your boat. Read through the instructions before building. Assemble the necessary tools and adhesives on a clean workbench or table. Keep paper towels handy to catch spills. Don’t forget the safety glasses!
- Page 4 Cut a piece of the paint-stirring stick Take the two pieces of wood, or smaller than the mahogany transom. hardback books, and wedge them to an These two pieces will be used on Assembly note: Set the Hull Liner angle to match the bottom of the either side of the transom for into the hull, then set the transom transom.
- Page 5 When you get to a corner, break away Clean your epoxy brush with alcohol. Cut Make a final alignment check of the the scrap, then continue cutting. Sand out the Deck. Cut carefully as this cut hull to be sure it is centered to the the cut edge smooth.
- Page 6 Then trim around the bottom at the The cup-shaped Helmet Mount will be Rough-trim the helmet close to the point where the plastic flares out. about 1/4 inch high. base as shown. CA the Helmet Mount to the driver’s Sand the cut line as necessary for a Note the shallower 45º...
- Page 7 Hull sides slip Additional instructions include hold the deck to the hull while the into the Deck flange where the sealant standard Vac-U-Cracker hardware sealant cures. is applied. Let this fully cure. you can use as a guide for your own.
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Page 8: Hardware Installation
HARDWARE INSTALLATION Use these instructions to install the hardware components of the Vac-U-Cracker, or as a guide for the basic setup of your own hardware. Alignment of the drive components is critical to a high-performance boat. Installing the hardware in the order shown will allow you to visually check the alignment and to make adjustments before applying adhesives. - Page 9 Hold the Turn Fin at an angle and Straighten the Turn Fin. Fill the recess Reinforce the Turn Fin installation by push filled-epoxy under its flange with filled-epoxy. laying a scrap of fiberglass cloth, or until it appears behind the holes. other material, into the epoxy.
- Page 10 Scuff the underside of the wood base Install the Motor Mount as shown with the Install the motor with the M3 screws so the epoxy will bind to the wood. 6-32 x 1/4 inch screws centered in the base in the lowest position on the Mount. slots of the mount.
- Page 11 1/8” 1/8” Set the Motor Assembly into the Connect the Prop Shaft Assembly to the Check the Prop to Hull distance one last time. Slide the Motor Base left or right to Hull Liner. Work quick. Even 30- Motor. Your goal is to have epoxy around center the Prop.
- Page 12 This completes the construction of Trim Tabs are installed level with the secure to the inside of the hull with the Vac-U-Cracker. Some tips are bottom of the hull at the outer edges. tape. This installation will be relatively attached. Go to www.vac-u-boat.com Drill 1/16th inch holes to mount them.
- Page 13 Now go find some water and have fun! Copyright © 2005 - 2011 Philip Pace, d.b.a. Vac-U-Boat...