12/10/2023 0 Comments 1979 chris craft runaboutI did not realize this untill the boat was finished and went for the shakedown run and guess what, the boat will not plane off. The problem is that when the planking was applied, a hollow was created between the frame spacing fore and aft between the keel and the chine. I sorry to say that I did check the bottom at the keel and the chine before planking with the plastic, no problem. I am glad to see that I'm not the only one who sees the problem in the bottom planking on the 19' racing runabout. Since I will have to go back and rework the bottom anyhow, this is my chance to turn the boat into a one step hydro, like the 16' CHRIS. That hollow spot is not even a 1/16" gap, but the suction it creates will be enough to never allow the model to climb up and plane off no mater how much power is available. What is normally done in this case? Should I just glue on the edge of the plank along the chine and the other to butterfly keel and fill in the gaps left between the bottom of the frame and plank or sand down the chine? I have noticed that when I rest a straight piece parallel with the bottom of the frame across the butterfly keel and chine (resting on the chine) it will leave a gap meaning that if I am to glue the plank down it would not completely stick to the frame (close to the chine) as the chime is higher. I am in the process of building the Dumas 1949 Chris-Craft 19' Runabout (1249) and I have just finished gluing in the Chine and am about to embark on gluing down the two bottom expanded PVC planks.
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