Roger Matthews has also made a T-38 from the AM plan, but with a difference:
"The Talon T-38 jet as the plan took my fancy, not as a powered flyer but as a catapult glider. So after a search through the scrap box, (balsa is getting thin on the ground at the moment after a seven ( yes 7) model building series during lockdown) I came up with the model pictured below, note the catapult hook.
After a quick test in the garden and finding no balance ballast required, I drew some of the detail colour lines, grabbed a 12mm dia dowel and bands, and went for my daily walking exercise (cough cough) which happens to pass a suitable dog walking field and took some extra exercise launching and retrieving this little model. Pure fun in a stick!"
Roger also told me the cg is back 15mm from the plan and (unexpectedly) it has a floaty glide.
Here is his model data:
1) AUW 13g (Fuselage 3mm med/hard balsa, all tail surfaces 1.5 mm med/soft balsa, wings 3/32 med/hard balsa sanded to a very basic flat bottom airfoil section)
2) No added balance weight used
3) C of G is 15mm rearward of your suggested - this may be due to heavier balsa used in fin and tailplane surfaces?
4) Hook details ands position see picture below, CA'd into position
5) Incident angles and surface dihedral/anhedral angles as per plan
6) Catapult is currently a hard balsa dowel 12mm diameter with 5 smallish bands as propulsion
7) I tend to launch in various angles into/across headwind to achieve a maximum climbing turning height
Maximum current flights up to maybe 8-10 seconds".
Roger and I discussed adding a one shot motor, and given it is very light (13 grams, not 20-25 grams (it is undoped wood) I suggested a pack of old Rapier L-2 LTs as most suitable (these produce about 110 mN) as I have a few of these left.
And so we gather in folk ... perhaps I should have been a US televangelist? (ugh!)
The following user(s) said Thank You: nitrocharged