Originally Posted by
serious power
Hi Malcolm,
I think the camera angle is tricking the view a little.
The lands are 10mm on the template giving a 9mm land on top and 8 to 9mm on bottom (due to pull/push on the wire - one template only).
My scale is not good enough to measure the weight of two sealing coats of dope - it seems to have added nothing at all ??
Brian
Edit ; I no longer have any use for hair spray
The coats of dope indeed add very little. A couple grams each sheet is probably all you add. But this step really helps when laying down the veil or other sheer fabric. Let me suggest that you also lay the veil down with dope. I use nitrate for that, two coats, and rub the veil in with a finger during the second coat making certain every square mm is laid down. Then lightly sand with 320-400 paper. You will add around 10-12 grams each sheet and will be quite stout. Pesky veil may be laid down with a MK iron
BTW- I decided not to build a new wing for Delta afterall. I took a closer look and decided to move the existing wing back instead. It calculated to 0.95" so I moved it 1 1/8" to give me some margin. I'm in process of making a mold of the 20.5 x 10 PN APC so I should be able to remove another 3 ounces from the prop up front.
I'm saving the wing cores I discussed above for my next project "Convergence".