On Oct 5, 12:46 pm, "Gig 601XL Builder" wrDOTgiaconaATsuddenlink.net
wrote:
wrote:
On Oct 5, 10:42 am, "Gig 601XL Builder" wrDOTgiaconaATsuddenlink.net
wrote:
Stefan wrote:
Cessna will offer the 172S Skyhawk with a Thielert turbo diesel
engine

I'd rather say that Cessna is anticipating the difficulty to explain
why they still sell engines with 50 year old technology, once the
pilots start to recognize that there are modern engines around which
burn less than half the fuel.

Are you saying the Thielert turbo diesel burns half the fuel? Wow!!!

A bit more than half. The 135 hp Centurion burns around 4
GPH in cruise. And that's Jet-A, which costs considerably less than
100LL.
The avgas supplies threaten to dry up because the
refineries don't want to bother with it. Avgas constitutes something
like 1% or less of the gasoline market, and carries hundreds of times
the liability. Would you bother with it under those conditions?

Dan

Apples and oranges Dan, the engine that is going in the new Skyhawk is a
turbocharged 155HP. What does it burn?

Dunno that. The original Thielert STC was for a 135 hp engine
in a Skyhawk. Less than the original engine, and a little less
performance because of that, but it generated that hp at about 2300
propeller RPM instead of the Lycoming's 2700 so that less hp would be
lost to drag.
See http://www.centurion-engines.com/

Dan