Welcome to the C-130 thread Mark. I guess I've hogged up a good bit of the space. Feel free to pick our brains about whatever you want, but as Bill said, most of us are building/ have built the fiberglass/foam version. I have a set of the Palmer plans for the smaller version Herk, and I shuddered when I looked at them. A tad too much work for me. Since there were some other theads you may not have seen, Jimcork was a Herk driver. All I got to do was ride half way around the world on one. Nice ride, though. Got to see how big the Pacific Ocean was from 20,000'.
I finished mine as a AC-130 Spectre gun ship from the 70's, named "Thor". I got a lot of good info for building mine from Jimcork. He was getting in his first flights just as mine was arriving. Mine is sitting in the basement now, awaiting some decent weather. 20 degree weather just don't suit for testing. Have to do some engine tests yet and it will be ready.
Coincidentally, I also have a TF DC-3, done up as AC-47 "Spook 71", the one John Levitow was in when he won the MOH.
What size engines does your plan call for on the Herk?
Randy