Common Name(s): Spotted Gum
Scientific Name: Corymbia maculata (syn. Eucalyptus maculata)
Distribution: Australia (coastal regions of New South Wales)
Tree Size: 100-165 ft (30-50 m) tall, 3-5 ft (1-1.5 m) trunk diameter
Average Dried Weight: 59 lbs/ft3 (940 kg/m3)
Specific Gravity (Basic, 12% MC): .71, .94
Janka Hardness: 2,330 lbf (10,360 N)
Modulus of Rupture: 20,550 lbf/in2 (141.8 MPa)
Elastic Modulus: 2,867,000 lbf/in2 (19.77 GPa)
Crushing Strength: 10,410 lbf/in2 (71.8 MPa)
Shrinkage: Radial: 6.3%, Tangential: 9.9%, Volumetric: 16.3%, T/R Ratio: 1.6
Firstly, are you going to use a milled board or a split bush billet?
When using a bush billet I carefully remove the bark and clean up with a wire brush as I don’t want to violate the fibers on what will be the back of the bow.
viewtopic.php?f=34&t=17237
If using a milled board you could try backing it with dry wall tape.
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https://www.youtube.com/watch?v=iVCMsbF_OD0 Kramer Ammons Dry Wall Tape Backing
[I don’t like the way the handle and abrupt fadeouts are done.]
Below is a basic plan I used when making hard rock maple flat bows backed with jockey silk.
I believe wider and thinner limbs would be better than narrower and thicker limbs.
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The plan is only a suggestion which you can modify where needed.
Daryl.