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WOF 3.5cc Outboard Tunnel

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  • WOF 3.5cc Outboard Tunnel

    WOF stands for wood over foam. This is truly a scratch build as you purchase a set of plans designed by Jerry Dunlap. You then purchase the hobby grade 1/32", 1/16" plywood and pink or blue foam. You then cut out the pattern shapes and trace around them on the wood and cut them out. Then you epoxy it to a piece of foam and trim to fit and then on goes another piece. That is an over-simplifacation but you get the idea. I am a K&B fan from way back but for varietys sake I decided to try the new(back then) OS 3.5 outboard. The advantage to an
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    WOF is its light weight compared to epoxy hulls or GRP. If you build it right it will stand up to the vibration as well.
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    This is the Hot Shot Sprint ABS cover that you buy from Dumas to cover everything and to give it a racey aerodynamic look.
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    Last edited by greenman407; 01-26-2012, 12:26 PM.
    IT TAKES GREAT INTELLIGENCE TO FAKE SUCH STUPIDITY!

  • #2
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    In these pictures you can see how the upper body is offset to the right. Just an attempt to counter inertia forces and keep more weight on the inside of the right hand turn.
    Last edited by greenman407; 01-26-2012, 12:26 PM.
    IT TAKES GREAT INTELLIGENCE TO FAKE SUCH STUPIDITY!

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    • #3
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      The shape of the bottom of the sponsons is designed to shed water and reduce drag. All corners and ends of sponsons should be sharp and square to promote a clean exit of the water.
      Last edited by greenman407; 01-26-2012, 12:26 PM.
      IT TAKES GREAT INTELLIGENCE TO FAKE SUCH STUPIDITY!

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      • #4
        The height of the bottom of the tunnel is also critical to get the lift you need to get the boat to plane in a controllable manner, not too much and not too little. Then its up to you just like in a submarine to get your CGs right and adjust everything so that repeatable results can be achieved. Problem is that when you have accumulated so many boats and submarines and HO scale train projects there just isnt enough time to spend with them in a one year period, so they end up sitting on the shelf way too much, then you start to feel sorry for them.
        Last edited by greenman407; 06-12-2014, 04:57 PM.
        IT TAKES GREAT INTELLIGENCE TO FAKE SUCH STUPIDITY!

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        • #5
          WOW! Five years has passed since I posted to this one. At any rate here are some new graphics for it. Also a new 2.4ghz receiver from Spektrum and a onboard receiver battery. A 2s lipo. Ive been using a AA battery holder but I like the extra insurance of more capacity. While I was at it I re-adjusted prop height and angle and re-did the throttle linkage. Now Im much happier about it all.
          IT TAKES GREAT INTELLIGENCE TO FAKE SUCH STUPIDITY!

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          • #6
            Pickle fork. What kind of speed? I use to have a Seabolt with a Merc, Black Max in the 90s. Scariest machine I ever rode. One wrong move in trim ,its stuff a sponson, or back flip it, one way or another. Drivers are encapsulated, prity much, now days, in crazy fast boats. Only option then was a parachute for the guy, if the body escaped the disintegration.

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            • #7
              Originally posted by Von Hilde View Post
              Pickle fork. What kind of speed? I use to have a Seabolt with a Merc, Black Max in the 90s. Scariest machine I ever rode. One wrong move in trim ,its stuff a sponson, or back flip it, one way or another. Drivers are encapsulated, prity much, now days, in crazy fast boats. Only option then was a parachute for the guy, if the body escaped the disintegration.
              Well, this boat, being powered by a 3.5cc outboard will run in the High 40s to 50mph. Especially since the motor is stock. No mods.
              IT TAKES GREAT INTELLIGENCE TO FAKE SUCH STUPIDITY!

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              • #8
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                Im not much into 3.5cc motors for boats.................So.........off comes the 3.5 and on goes this:
                IT TAKES GREAT INTELLIGENCE TO FAKE SUCH STUPIDITY!

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                • #9
                  Got it off Ebay for a STEAL!! Im listing the OS MAX 21 outboard for sale here:
                  OS MAX 21 OUTBOARD in Toys & Hobbies, Radio Control & Control Line, RC Model Vehicle Parts & Accs | eBay
                  IT TAKES GREAT INTELLIGENCE TO FAKE SUCH STUPIDITY!

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                  • #10
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                    Got a new carburator and piston and sleeve and a motor mount for it from Joe Monahan of 707 Specialtys. Also got a remote needle valve and bracket Here it is hung in place. Throttle cable is not long enough. Gotta order one. I think Ebay loves me. Click image for larger version  Name:	004.JPG Views:	2 Size:	65.1 KB ID:	116689
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                    Last edited by greenman407; 10-09-2016, 07:58 PM.
                    IT TAKES GREAT INTELLIGENCE TO FAKE SUCH STUPIDITY!

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