Optimist Radio Controlled 1/4 Scale Mini Sailing Dinghy
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    • V3 Building Instructions
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    • OLDER GALLERY PICS V1 V2
    • Hull Assembly (Click for Pics)
      • Rudder Assembly & Installation
      • Daggerboard Thwart and Trunk Assembly
      • Airbags Installation
      • Installing Integrated Deck/Cover to Hull
    • Daggerboard Assembly
    • Trimming Parts and Components
    • Rig Assembly
      • Rig Building Pictures
    • Radio RC Installation
    • First Trial Sail
  • OLDER GALLERY PICS V1 V2
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  • About US
  • Contact US
  • Building Guides (Click here for class rules)
    • V3 Building Instructions
    • MiniOpti Gallery Pictures
    • Document Downloads
  • Older Version Building Instructions
    • OLDER GALLERY PICS V1 V2
    • Hull Assembly (Click for Pics)
      • Rudder Assembly & Installation
      • Daggerboard Thwart and Trunk Assembly
      • Airbags Installation
      • Installing Integrated Deck/Cover to Hull
    • Daggerboard Assembly
    • Trimming Parts and Components
    • Rig Assembly
      • Rig Building Pictures
    • Radio RC Installation
    • First Trial Sail
  • OLDER GALLERY PICS V1 V2
  • V1 Older Shipped Kit Example
  • General Builders Pictures
  • News & Info
    • Videos
  • Register
  • Promotions
  • Map Locator
  • Colors
  • Links
  • Organizing a Club
  • Dealers
  • Schedula a Regatta

 

 

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April 17th 2014 Our newest tools to produce the new "Mini-Opti". With these new tools we are able to produce the highest quality 1/4 scale Optimist Dinghy. We have redesigned the kit to incorporate the deck and waterproof cover in one piece making it a better performer overall. 

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Here are the new cad drawings of the daggerboard with integral lead bulb which we are shipping with our new kits.

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August 25th 2011,We are forming the Elgin MiniOpti Sailing Club

If you live in the Northwestern Illinois and in or around Elgin, Illinois and want to participate in club sailing please contact us. We will tentatively be meeting and sailing behind the Gail Borden Library on the Fox River once we have established our club. Anyone interested in coming out to sail one of our demo boats is welcome. We will have ten club boats and hopefully members will build boats this coming winter and we will meet to plan an tentative schedule of 2012 season of sailing regattas and events.

August 24th 2011, We want to thank you all for your patience in getting the first boat kits off of the production line but we do not want to send out hulls that are not up to our standards. We have modified the vacuum former to include a double vacuum to allow proper drawing of the thicker ABS hull in the mold. We are as anxious to get deliveries out as you are in receiving your boats but waiting a bit longer will allow us to get out the first 350 new hulls that are of the highest production quality...

 

 

August 6th 2011 - We have sourced new drum winch servo's that resolve the complicated drum tension problem.

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We will be stocking 4 models of new drum servo's that have enclosed drums which eliminate the need for special handling of the drum lines. They are fully self contained and make sheeting simple and efficient. They are cost effective and will work on a wide variety of sailing models. one set has nylon gears with 4 turns and 6 turns respectively and one set has metal gears for larger boats.

July 15th 2011

This is the big week, our vacuum forming machine is running and we are doing run tests to get all the settings perfect. We will be producing kits later this week so place your orders now.

May 31st has come and gone the bad news no boats yet, but the good news is the production machinery is running we are just waiting for materials, we will be producing the first boats by June 15th. We thank everyone for there interest and patience, good things never come easy!

May 21st 2011
More pictures of boat test #2 with full rubber seal around cover. Third boat will have a more traditional servo sail winch arrangement but we will sea trial this boat in the coming week. We believe some of the fun in building and sailing your Mini Opti will be the freedom you have to design your own radio installation. We want to give you the freedom to come up with your own ideas even as we present ours. The next boat will have the sail servo on a continuous loop with a secondary feed for the sheet. One thing should be noted that this is a dry sailor with good free board height and even without the cover stays dry unless she tips over. Not like some Radio Controlled sailboats that act more like submarines when they sail.

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This is our second test MiniOpti with the clear waterproof cover installed! Has the battery installed in the rear flotation for better Balance. Servo's are mounted to the underneath of the cover and come off with the cover in static display. The sheet extends through two small eyelets in the cover center which is not shown below. Stay tuned!

How's this for a beautiful place to sail Opti's and MiniOpti's we hope to have a dealer sales representative here soon in Melbourne's Albert Park!

May 15th, 2011 We are beginning Sea trials of the new waterproof cover setup and will be posting pics shortly

May 1st, 2011 Sea trials are starting with the preliminary production boats build from original inventory, news to follow we are testing ballast and design of various weighting arrangements as well as the waterproof cover design and gasket methods to ensure watertight fit.

April 30th, 2011 We have our vacuum forming equipment and are setting up shop. First production run of 350 boats scheduled for May 31st delivery.

March 16th, 2011 Our Sails are coming out of production and we will be posting pics shortly. They are authentic hand made sails and very nice!

January 6th, 2011 Purchased exiting business in whole including existing inventory, molds, production rights and incorporated as Optimist RC Mfg., LLC


Building Steps

1 - The Level 1 kit for sale on MiniOpti's Shopify cart has all of the main components precut and ready for assembly. The kit includes the main components assembled, which includes the daggerboard glued and fitted to the hull. The thwart installed and glued to the hull. The mast step aligned and glued in as well as the rudderpost glued up. These are the core components of the build.

The next steps can be done in most any order.
  • Turn the deck upside down and apply the self-sticking weatherstripping to the under edge of the cover.
    • You could use an occasional drop of super glue to keep it from lifting.
    • Put the cover onto the hull and turn it upside down so that you can drill the six holes for the screw downs. (See Pics) The screws are installed from underneath using 8-32 x 1/2" S.S. machine screws.
    • Do not attach the cover yet
  • For the radio cover you will do the same process as the deck. 
    • Turn the radio cover upside down and apply the self-sticking weatherstripping to the under edge of the cover.
    • Put the cover onto the deck and turn it upside down so that you can drill the four holes for the screw downs in the corners. (See Pics) The screws are installed from underneath using 8-32 x 1/2" S.S. machine screws.
    • Do not attach the cover yet.
    • Servo & Receiver components Installation
      • Additional steps to take for the servo cover.
        • Attach the rudder and sail servo to the underside of the cover using plasti-weld or epoxy.
          • Before attaching the sail servo attach the drum cover to the servo (4 small screws included)
            • Line up the servo with the drum towards the rear of the cover dome. Glue and let it set thoroughly.
          • Attach the rudder servo aligning the arm centered in the slot provided for the linkage. Glue as well.
        • Drill out the linkage slot and the mainsheet pass thru. You will use a rubber grommet supplied with the servo install into the hole you drilled make sure it is large enough to insert the grommet, but not too big!
        • Attach the mainsheet to the inner drum. Temporarily attach the inner drum and the line thru the grommet. It will need to be adjusted later and screwed on.
    • Install the battery into the battery well at the lowest portion of the deck cover towards the rear of the well. I prefer Velcro so it can be removed for replacement when necessary.
    • Additionally, add the receiver to the underside of the cover and drill a hole for the antenna. (expand on this)
    • Install the waterproof switch to the cover (expand on this)
    • Plug it all together and test by binding the transmitter and receiver and cycling the servos. Before you can attach the cover, you need to adjust the drum and rudder arm so that they have the necessary travel then you can screw the arm and drum together.
    • Attach the rudder yoke to the rudder servo and pass the rod thru so it can be attached to the rudder. Once this is done you can screw down the cover and attach the yoke to the rudder.
  • Airbag's 
    • There are three airbags to install into the hull two forward of the thwart, one in the rear.
      • There are six elastic straps used to attach the airbags to the hull. (These are optional but recommended since they make the Miniopti nearly unsinkable.
      • Inflate the airbags, attach the straps. You can use either a hot glue gun or plastic bonder from JB Weld to attach the straps to the hull. 
      • Once the airbags are installed you can attach the cover with the six screws you have previously installed.



















  • Assemble and attach the rudder
    • Drill and glue the rudder hinges to the rudder.
      • Install the tiller hinge to the top left of the rudder.
    • Align the hinges and drill and glue the transom hinge to the transom.
      • Note: Make sure the rudder bracket clears the deck, this requires the rudder arm to be high enough to clear the deck.
  • Rigging
    • ​​​Includes
      • ​​Mast, Boom, Sprit, Sail, Battens, Main-hoist, Rigging lines, Boom Jaw, Bowsers, Mini Harken Hoist Block
        • Larger Regatta Rig Mast Height 26" x 1/2"  (660 mm x 12mm)
          • Classic Rig 23-3/8" x 1/2" (595mm x 12mm)
        • Larger Regatta Rig Boom Length 18-3/4" x 1/4"  (475 x 8 mm)
          • Classic Rig 18-3/4" x 1/4" (475mm x 8 mm) [Both use the same sized boom]
        • Larger Regatta Rig Sprit 24-1/2"" x 1/4"  (620mm x 8mm)
          • Classic Rig Sprit 22-1/2" x 1/4" (570mm x 8mm)  
        • Instep Mast Deck Collar
      • The Mast, Boom & Sprit can be carbon fiber or wooden dowel. Both function equally well.
        • You can use a boom jaw or eye hooks to attach the boom
        • The end of the boom is slotted for the outhaul.
        • The Sprit is slotted as well on both ends for the clew and uphaul rigging.
  • "Glues and Attachment accessories you can use
    • ​Epoxy 30 Minute
    • Plastic Bonder from JF Weld
    • Crazy Glue in various consistencies (Thin, Medium, Thick)
    • Velcro - For Batteries and Transmitter
    • Optional Mast Hoops
    • Instep Mast Deck Collar




















  • About US
  • Contact US
  • Building Guides (Click here for class rules)
    • V3 Building Instructions
    • MiniOpti Gallery Pictures
    • Document Downloads
  • Older Version Building Instructions
    • OLDER GALLERY PICS V1 V2
    • Hull Assembly (Click for Pics)
      • Rudder Assembly & Installation
      • Daggerboard Thwart and Trunk Assembly
      • Airbags Installation
      • Installing Integrated Deck/Cover to Hull
    • Daggerboard Assembly
    • Trimming Parts and Components
    • Rig Assembly
      • Rig Building Pictures
    • Radio RC Installation
    • First Trial Sail
  • OLDER GALLERY PICS V1 V2
  • V1 Older Shipped Kit Example
  • General Builders Pictures
  • News & Info
    • Videos
  • Register
  • Promotions
  • Map Locator
  • Colors
  • Links
  • Organizing a Club
  • Dealers
  • Schedula a Regatta