DR-1 (Sands): Builders Group

[worldcrusier]

This pic shows a spar scarf almost done.

[worldcrusier]

This shows how the plane slides down the jig. Again, the blades are cut down to avoid damage to the guides. The cut depth is set very small and maybe ten or so passes are required, but each complete scarf only takes about a minute or less.

[worldcrusier]

This is the scarf jig for the ply.

[worldcrusier]

This shows a piece of the spar side 45 degree ply in the jig.

[worldcrusier]

After two passes. These are very light passes with the depth set barely above 0"

[worldcrusier]

After three passes. A little practice and you can 'adjust' the pass from end to end to even out any low or high sections.

[worldcrusier]

After five passes the finished scarf.

[worldcrusier]

This shows the plane on the jig. the steel plate serves to set the angle and also hold down the ply during planing. A complete cycle for each scarf is about 30 to 45 seconds and you can do all the scarfs for a spar in a very short time.

[Fokker210]

Worldcruiser,
I really like your scarf jigs, especially the spar jig ! I have been trying to work out the best possible way to handle the large spar scarfs and you look like you have got it down just right !

For my ply scarfs, I am using a John Henry attachment for my planer. It works very well on the ply and with the addition or removal of spacers can attain any number of scarf ratios.

[Fokker210]

The underside of the unit.