How many turbo charged airplanes are viable right now ? Whole swaths of old turbo 310, 320,early 340’s, 401/402, tip tank 414, 421A/B, turbo Aztec’s, early turbo 210, turbo Lances, and high time short body Navajo’s have a sell price less than the cost of the overhaul of their engines. They are going away regardless of the future of 100LL
When you look at airframes where it is worth spending 60K for an overhaul of the existing turbo big block Continental/Lycoming, the list shrinks substantially. I bet 25 STC’s would cover 90 % of the types which are viable going forward