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PX 300  
Instruction Manual 

Page 3 

Build the Sponsons 

Step 1 

Sponson Formers 

A: 

Locate formers 1L thru 13L and 1R thru 13R from 

CENTER SECTION

 and 

SHEETING SHEET1. 

B: 

Locate Sponson Keelsons from 

SPONSON SHEET

 

C: 

Place wax paper on your building board 

D: 

Clamp the “

LEFT SIDE

” Sponson Keelson on the edge of the building board as shown.  BE SURE to use enough 

clamps so the keelson lies flat on the building board. 

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 

Formers 

Sponson Keelsons 

Left Side 

C 

D 

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 

Doublers 

Содержание PX 300

Страница 1: ...oped by Mike Luszcz of ML Boatworks the PX300 FE has a 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 The PX300 currently holds the SAW P O B tunnel...

Страница 2: ...ts was cut with a Laser Cutter specifically designed for plywood Small tabs are left to hold the pieces while they are being cut To remove the piece press gently near the tab and the part should push out HOWEVER if it does no come out easily we recommend cutting the tab with a hobby knife as shown below Page 2 Introduction Tools required Hobby Knife Hobby Saw Various C Clamps or Spring clamps Mask...

Страница 3: ...T SIDE Sponson Keelson on the edge of the building board as shown BE SURE to use enough clamps so the keelson lies flat on the building board 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 Formers Sponson Keelsons Left Side C D NOTE this is a picture of the right side installation We are showing how the num...

Страница 4: ...ld the Sponsons Con t 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 Sponson Formers B C ...

Страница 5: ... 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 place being sure to put glue on the former and sponson ...

Страница 6: ...sing your sanding block sand flush with the sponson keelson be sure to do top and bottom B Step 4 Sponson Stringers A Locate the 34 long 1 8th Square Basswood sticks B Put one stick into the notch in the 1 former as shown C Press the stinger into all the formers D Mark the stringer where it touches the sponson doublers remove stringer cut where marked re install stringer and glue into place B C D ...

Страница 7: ...n 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 ...

Страница 8: ...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 Note the over hang A C C Non Trip Outer Edge Secondary Ride Pads Builders Note BEFORE you start the next step we recommend experimenting with the Sure Form to see how it behaves Pulling in one direction seems to give some chattering and difficulty pul...

Страница 9: ... the former outer edge sheeting and the former NOTE you will see a slight bevel on the sheeting and the former as shown C Locate Sponson Non Trip from SHEETING SHEET 2 D Test fit sheet as shown making sure the sheet is flush or has some over hang BE SURE TO LEAVE 1 8 See the picture on the next page E Glue into place Using masking tape to hold in place clamp to the building board while the glue dr...

Страница 10: ...Page 10 Sponson Sheeting Non Trip Once the glue is dry remove the tape and sand to shape as shown Build the Sponsons Con t This picture is in error this should only be 1 8 overhang D ...

Страница 11: ...ing block to final sand the entire ride pad area Please note you are trying to sand this so that the pad is a flat surface such that the non trip sheet is flush with the stringer and the sponson keelson are at the same angle as the former 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 th...

Страница 12: ...Page 12 Sponson Sheeting Ride Pad con t Build the Sponsons Con t Your s should look like this Note Angle Note flush with stringer ...

Страница 13: ... to shape the ride pad is made larger to insure the inside edge of the sponson can be made sharp So it will require some trimming To do that we recommend you D Align the over lap then locate the ride pad so it slightly over hangs the non trip sheet Clamp or tape in place PX 300 Page 13 Sponson Sheeting Ride Pad con t Build the Sponsons Con t C C D Align the pad so there is plenty of overhange on t...

Страница 14: ... straight This step should be done carefully because it is very easy to build in twist during this process We have developed two method to install the pads to insure the sponson remain flat The first one is the elevate the sponsons method A Place two of the 1 8 square sticks on your building board B Clamp the sponson on the spacer This will allow the overhang on the inside edge to not interfere wh...

Страница 15: ...ame as shown and tack glue if from the inside work your way forward going one bay at a time IMPORTANT Use small amounts of glue to start Take your time BE SURE the glue is hard before you move on When you ve finished check the entire ride pad is flat against the frame work Then go back and glue completely Sponson Sheeting Con t Ride Pad con t Build the Sponsons Con t C A B C D D WARNING This photo...

Страница 16: ...gn 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 E hold the ride pad against the frame as shown and tack glue if from the inside work your way forward going one bay at a time IMPORTANT Use small amounts of glue to start Take your time BE SURE the glue is hard before you move on When you ve finished check the entire ride pad is flat...

Страница 17: ... are glued down we turn our attention to the sponson inside edge 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 ...

Страница 18: ...e 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 C 10 up from the rear of the sponson place another mark 1 and 1 8 in from the edge of the sponson D There is excess wood on the pad to reduce sanding time we recommend aligning to both marks made then mark ing the edge as shown B C C Mark D D ...

Страница 19: ...r 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 A Cut here B C Build the Sponsons Con t SHARP ...

Страница 20: ...he 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 bay This increases strength and allows the fiberglass tape to lay flat see builders note pictures D Brush resin on all the surfaces and to the tape so that it attaches to the frame BE SURE to apply in all areas for mers and stringers Do th...

Страница 21: ...lica to a thick paste C Fill the cone as shown D Fold the end over and continue to fold until the paste begins to flow put a small bead in the corner on both sides of the center stringer and the inside of the outer stringer 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 A B C D E F D Builders Tip ...

Страница 22: ... increase the hull is breached Using Styrofoam Pool Noodles or in sulation foam Cut to shape to fit the sponson bay as shown D Test Fit a Sponson top make sure it covers the sponson leaving some overhang all around E Begin by brushing the underside of the sheet with resin to seal it WHILE ITS WET place on top of the sponson wet side down BE SURE it covers the sponson and TAPE IT with masking tape ...

Страница 23: ...PX 300 Page 23 Sponson Sheeting Sponson Top Build the Sponsons Con t C ...

Страница 24: ...Test fit in place as shown E With all the formers radio box bulkhead and transom doublers in place tack glue all parts F Finishing adding formers note extra long tabs glue into place G Install Front Radio box bulkhead use masking tape to hold in place H Locate 1 piece of 1 8 square basswood strip as shown in B place out strip as shown in picture F I Be sure the square is in the notch in the transo...

Страница 25: ...PX 300 Page 25 Long Tabs A B F Slide square bass wood in from the front I ...

Страница 26: ... 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 Clamp in place BE SURE this is square it could affect performance so take your time then glue in place B B B ...

Страница 27: ...e CENTER SECTION SHEET B Glue 1 2 together place in radio sides as shown while still wet Clamp together 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 Transom 1 2 B Transom C ...

Страница 28: ...e doubler flush with outer and inner formers D Install your dowels we recommend flush with the inside of the radio box and 1 2 past the outside former sorry no pictures E Seal the center section BE SURE to get all surfaces We recommend putting masking tape on the outside of the outer former to prevent resin from going trough F We recommend putting foam in the center section for flotation B C A E F...

Страница 29: ...rs and nose doubler C Using a slow cure Epoxy glue brush the underside of the sheet to seal it then tape the sheet in place USE LOTS 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 Top Sheet ...

Страница 30: ...sure the center section is square to the building table as shown Take extra time on this step if this is flush and square your sponson will be straight and perpendicular to the center section 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 A B C D D E PX 300 ...

Страница 31: ...nd bottom We recommend the use of least 30 minute epoxy We ALSO recommend thicken paste as suggested in the sponson building section 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 ...

Страница 32: ...ation Radio installations are a matter of personal preference 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 ...

Страница 33: ...PX 300 Page 33 ...

Страница 34: ...Center Section Sheet Sheeting Sheet 1 ...

Страница 35: ...Sponson Sheet Sheeting Sheet 2 ...

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