Wooden Boat People
By McKenzieDriftBoat.com
Cutting notches in the frames for chines?
Can anyone give me some advice as to the best technique for this. i have some ideas but i am tired of racking my brain as to the best approach... I just don't want to build a frame and then screw it up and have to start over! Thanks in advance.
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Permalink Reply by Kevin C. on
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The bestway to tackle this is to first make a mock frame with some scrap 3/4" stock.Pick a frame in the middle of the boat cause it's the easiest angle to practice with.Fasten the uprights to the floor frame with a couple screws,be sure to keep them away from the notch area.Now you can mark the frame where the notch will be depending on how thick and tall your chine is.On a table saw set up a jig with an angle fence and set the blade to the desired height of your cut on with the bottom of your frame laying flat on the table surface and make your upright cut,obviously this cut will be about a 90 deg. cut as its in the center of the boat,but will become a greater angle as you work towards the bow and transom.The angle of the blade should be constant throughout the entire side to accomodate the hull angle. The second cut,the top ,where the top of the chine meets the frame, must also be cut at an angle.Your chine should have a downward angle so water will not collect there so you must determine this angle and make your frame cut to fit this angle by laying the frame on its side,with the outside face of the upright laying flat on the table and the saw blade set for the appropriate depth.All this must be done with the angles already cut on the outside of the frame(that faces the plywood of your hull and floor accordingly) so the cuts will match those same angles.I hope this makes sense,you might have to read it 10 times for that to happen but the finished product will give you perfectly tight notches to seat the chine.Good Luck... Kevin
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i just have this one photo of the upright cut
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IMG00178.jpg, 478 KB
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Permalink Reply by Jordan Davis on
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This is awesome! Exactly what I was looking for. i am not very steady with a draw saw so this will make things perfect. Thank you so much!
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Permalink Reply by Dave Z on
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Hacksaw with a stiff blade.
Rip your chine material to length. Saw off a 2" chunk to use to mark all sides of the frames to receive the notch. Chock up the frame in a vise and get to sawing. A hacksaw is a must in my opinion. The table saw method look precise as all get out, but looks very time consuming. I may be lazy, so don't take my word for it!
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