After a looking around online I can't find any sources nor many references (last rec.woodworking reference was in 1998) for planetor bits. When still in production (and available) they were used to bore long straight holes in the ship building, electrical and pipe fitting trades. I once saw a set on Ebay, but that was months ago and haven't seen any since.
My intended use is to bore a hole in the endgrain of a piece of wood (maple, cherry, cocobola) about 20-24" long to make a wooden flute. The final inside diameter could be 11/16" up to 1" It is very important that the hole is straight.
Anyone out there had any experience with these bits? Know of a source? Have an alternative for boring holes like this? Thanks.