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PTI PX 300 Instruction Manual

P-limited high performance tunnel hull kit
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P– Limited High Performance
The PX300 currently holds the SAW P O/B tunnel record
Won the 2012 World Tunnel Champions in Charleston,
Developed by Mike Luszcz of ML Boatworks
completely new ride pad surface with variable
dihedral technology, and is a full frame up kit.
The kit is now available with a Lexan cowl (guarantee from crash
damage for life), a white gel coated fiberglass cowl is also availa-
ble.
This hull is designed specifically for 4s P-limited lipo power sys-
tems.

INSTRUCTION MANUAL

PX 300
Tunnel Hull Kit
in IMPBA
PX 300
the PX300 FE has a
,
Special points of interest:
A full frame up wooden
kit
Includes all wood to
make the hull and radio
box.
Lexan or Fiberglass cowl
Designed for the OS Low-
er unit and any P Limited
motor

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Summary of Contents for PTI PX 300

  • Page 1: Instruction Manual

    PX 300 INSTRUCTION MANUAL PX 300 P– Limited High Performance Tunnel Hull Kit Special points of interest: A full frame up wooden Includes all wood to make the hull and radio box. Lexan or Fiberglass cowl Designed for the OS Low-...

  • Page 2: Getting Started

    Please review the parts list located at the back of this manual. Become familiar with the sheet name and the parts located on them Your PTI boat kits was cut with a Laser Cutter specifically designed for plywood. Small tabs are left to hold the pieces while they are being cut.
  • Page 3 E: Insert former 1L in slot 1 and Former 2L in slot 2, continue till 13L is installed as shown in pic E. Do the same thing for the right side NOTE : this is a picture of the right side installation We are showing how the number should match. Do this for formers 1 thru 13 L and R PX 300 Page 3 Instruction Manual...
  • Page 4 Build the Sponsons Con’t Inside Story Headline Sponson Formers A: Locate Former #1 Doubler from CENTER SECTION B: Glue to former 1 as shown, be sure the edges line up C: Use a triangle or combination square to check perpendicularity and clamp together as shown Page 4...
  • Page 5 Build the Sponsons Con’t Step 2 Sponson Shear A: Locate Sponson Shear from CENTER SECTION B: Starting from the front Insert the shear into the sponson keel as shown BUT glue it AFTER you’ve test fit formers C: While holding the front in place, align the former with the notch in the sponsn shear as shown D: Work your way down the sponson keel, sliding the former into the notch and into the notch in the sponson keelson E: Once all the formers are in place check to be SURE the sponson shear is flush with the end of the former as shown F: Press the shear down gently to be sure its seated on the sponson keelson then using CA glue tack the formers in...
  • Page 6 Build the Sponsons Con’t Step 3 Sponson Nose Doublers A: Locate Sponson nose doublers from SPONSON SHEET B: Glue on both sides of the Sponson keelson as shown, clamp as shown until glue dries C: Using your sanding block, sand flush with the sponson keelson, be sure to do top and bottom Step 4 Sponson Stringers A: Locate the 34”...
  • Page 7 Build the Sponsons Con’t Sponson Stringers E: Repeat this for both ride surface stringers and non trip stringer and both left and right sponsons F: BE SURE all stringers are flush with the formers… Then glue as shown to all the stringers and formers Glue Page 7...
  • Page 8 Build the Sponsons Con’t Step 5 Non– Trip Sponson Sheeting Outer Edge Outer Edge Secondary Ride Pads A: Using a sanding block sand the outer edge surfaces flush with the former as shown B: Locate Sponson “outer edge” from SHEETING SHEET 2 C: Test fit outer edge making sure the edge is flush or has some over hang on BOTH top and bottom stringer AND making sure the sheeting lies flat on the stringer D: Glue both sides of the Sponson Outer edge as shown, clamp as shown until glue dries...
  • Page 9 E: Glue into place, Using masking tape to hold in place, clamp to the building board while the glue dries to prevent twists in the sponsons NOTE: BE SURE to use plenty of masking tape, its very important the sheeting is flash with all the stingers and bulk heads. Note bevel Masking tape omitted for clarity PX 300 Page 9...
  • Page 10 Build the Sponsons Con’t Sponson Sheeting Non Trip Once the glue is dry, remove the tape and sand to shape as shown This picture is in error this should only be 1/8” overhang Page 10...
  • Page 11 Building note: Use a block as shown below, trying to use long strokes front to back To check the surface we recommend a straight edge as shown in the picture on the next page PX 300 Page 11...
  • Page 12 Build the Sponsons Con’t Sponson Sheeting Ride Pad (con’t) Note flush with stringer Note Angle Your’s should look like this Page 12...
  • Page 13 D: Align the over lap then locate the ride pad so it slightly over hangs the non trip sheet. Clamp or tape in place D: Align the pad so there is plenty of overhange on the inside of the sponson E: Mark the outer edge with a pencil as shown PX 300 Page 13...
  • Page 14 Build the Sponsons Con’t Sponson Sheeting Ride Pad (con’t) A: trim and sand BE SURE to keep this edge sharp. Builders Note: The next step is very critical, for the best performance, its very important the sponson remain straight. This step should be done carefully because it is very easy to build in twist during this process.
  • Page 15 When you’ve finished, check the entire ride pad is flat against the frame work. Then go back and glue completely WARNING: This photo is in error. Leave an 1/8” over- hang, it will get trimmed later PX 300 Page 15...
  • Page 16 Build the Sponsons Con’t Alternate Rid Pad Sheeting method This outlines an alternate method to glue the ride pad on to the sponson. It requires a rigid straight piece of wood or metal, we used aluminum angle.. A: Clamp the sponson to the angle as shown B: Align the sponson over hang as before, C: Align the pad so it over laps the non trip sheeting as shown D: Align the front of ride pad as shown and clamp in place...
  • Page 17 Using your Sure Form remove most of the excess ride pad… Finish with a sanding block to insure you sand it flush with the sponson keelson. PLEASE BE SURE to keep this edge as sharp as possible Use a straight edge to confirm PX 300 Page 17...
  • Page 18 Build the Sponsons Con’t Step 8 Sponson Sheeting Secondary Ride Pad Outer Edge Secondary Ride Pads A: Locate Sponson “Secondary Rid Pad” from SHEETING SHEET 2 B: To locate the secondary ride pads correctly on the rid pad, you need to measure 1 and 1/8” in from the inside of the sponson at the rear of the sponson.
  • Page 19 A: Cut or band saw the excess BE SURE TO LEAVE an 1/8 of an inch or so B: Align to marks again then glue into place. Tape reduced for clarity C: Sure Form or sand flush with sponson keelson , keep this edge as sharp as possible Cut here SHARP! PX 300 Page 19...
  • Page 20 Build the Sponsons Con’t Step 9 Sponson Sheeting Sponson Top Ride Pads Sponson Tops A: Before we sheet the tops of your sponson, we recommend sealing the inter frame work. We suggest Epoxy resin as its lighter, but you can use Polyester resin. We also recommend using fiberglass tape included in the kit B: We suggest applying masking tape on the outer keelson to keep resin from leaking through to the mating surface C: Cut pieces of the fiberglass tape to fit in each bay as shown BUILDERS NOTE: While it is not necessary some builders add a bead of thickened epoxy alongside the strings in each...
  • Page 21 E: Using a disposable brush Gently apply liquid resin, just enough to wet the cloth but not push the thicken resin Bead of thickened epoxy PX 300 Page 21...
  • Page 22 Build the Sponsons Con’t Sponson Sheeting Sponson Top Ride Pads Sponson Tops A: Prepare the top of each sponson. Using a sanding block, sand diagonally length wise up and down the sponson until the keelson is flush (and a slight angle) with the former AND the Non trip is flush with the outside sponson as shown B: Locate the “Sponson Tops”...
  • Page 23 Build the Sponsons Con’t Sponson Sheeting Sponson Top PX 300 Page 23...

  • Page 24: Build The Center Section

    Build the Center Section Step 10 Center Section Transom Doubler Front Radio box bulkhead Radio Box sides Center Section bottom Rear Radio Box Nose Doublers Bulkhead Transom Doublers A: Place wax paper on your building surface Locate the “Center Section” from the CENTER SECTION SHEETING sheet.
  • Page 25 Slide square bass- wood in from the front Long Tabs PX 300 Page 25...
  • Page 26 Build the Center Section Center Section Left & Right Outer Former A: Locate the “Left & Right Outer Former” from the SPONSON SHEET, place over extended formers B: Using a square BE SURE the former is square to the table and flush with the center section sheet… Check the entire length.
  • Page 27 C: Glue the TRANSOM in place as shown and clamp NOTE: These pictures show installation before the Outer formers, it can be done then. However we found it easier placed if done when the outers in place PX 300 Page 27...
  • Page 28 Build the Center Section Center Section A: Glue in to place top center section stringers (1/8” square basswood) using clamps B: Using a sanding block sand the stringer and formers flush C: Sand nose doubler flush with outer and inner formers D: Install your dowels we recommend flush with the inside of the radio box and 1/2”...
  • Page 29 OF TAPE!! Then clamp in place on a flat surface. Use clamps as shown to be sure the sheeting lay against the formers and stringers on the radio box side. BE SURE this is on a flat surface so it remains flat while curing, PX 300 Page 29...
  • Page 30 C: Glue the dowels in place D: Test fit the sponons, by clamping are shown then check the perpendicularity to the center section E: Check to be sure the spnsons are flat on your building table PX 300 Page 30...
  • Page 31 Apply liberally to the joint.. Clamp together as before BE SURE TO CHECK The sponson perpendicularity (Photo D) The run your finger along the joint as show to form a fillet, to this for the top deck and the inside of the tunnel Note Gap PX 300 Page 31...

  • Page 32: Radio Installation

    However we have found an install with the servo n the from of the radio box, the battery in the center and the ESC at the back seems to put the center of gravity in a good spot PX 300 Page 32...
  • Page 33 PX 300 Page 33...
  • Page 34 Center Section Sheet Sheeting Sheet 1...
  • Page 35 Sponson Sheet Sheeting Sheet 2...