Keel Trunk Fillet Reinforcement

Review of the important reinforcement to the keel Trunk

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Keel Trunk Fillet

 

(This is very important)

With the addition of a mast compression post the need for a keel trunk fillet is an important feature that needs to be added to the hull. This spreads the load from the rig thru to the hull over a greater area. Failure to install this fillet may result in a stress crack at the forward edge of the trunk.

 

This photo is an example of the minimum fillet I would recommend
(Keel tube has been removed for clarity)

 

Preparation

  • Clean the hull and trunk area with a solvent (Alcohol is fine) to remove any oil.

  • Thoroughly sand the area around the trunk and the trunk sides.

  • Remove the dust and clean the area again with Alcohol.

  • The Keel tube and compression post should be installed with CA.

  • Assemble and trial fit the radio board using the modification see Radio Board 3/8" aft of the keel tube.

  • Mark the location of the wood cross beam, clean and sand the marked areas.

  • Remark the radio board location again and prepare for the epoxy.

Epoxy Operation

  • Work steadily and smoothly this must be all done before the epoxy begins to set up.

  • Mix the West system and micro-balloons to a thick "Peanut butter" like consistency.

  • Apply thickened epoxy to bulb fin slot then assemble ballast and keel fin.

  • Apply thickened epoxy to the keel trunk as shown above.

  • Apply epoxy to the locations for the cross beams and install the radio board. smooth the epoxy to create fillets from the beam to hull.

LET CURE OVERNIGHT

I know, your thinking "I have to do all of that, all at the same time". Well it is a bit to do, but if you plan what you are going to do and in the order you are going to do it, you should not really have a problem. Work steadily and smoothly.

Now read this again and go over the "Instructions" #3 and 4.

Get everything ready, rehearse the steps and lets mix some epoxy.

 

 

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