AnyOldName3

Lots of ad companies and other data harvesters who wanted to keep being evil put out a lot of misinformation about things the GDPR would outlaw, and some of it stuck, so plenty of people think the GDPR says things it doesn’t. In general, you’re safe as long as you don’t do anything obviously dodgy or send data to a company likely to do evil things with it, but in a world where nearly everyone uses Google analytics to monitor if their site goes down, everyone had to change something and there was plenty of opportunity to scare people by telling them they needed to change more than they really did.

I was meaning that the blade count and detachability was the difference in definition between turboprop and propfan/open turbofan, not that it was necessarily the thing making the engine more efficient.

I’ve seen turboprops in museums and on the internet with around six or eight blades. When I looked on the Wikipedia page for propfan engines, which seems to be another name for an open turbofan, the distinction seemed to be mainly how the blades were shaped (like propellor blades or turbine blades) and how tightly-integrated everything is (you can swap the propeller out on a turboprop).

How many blades do you have to add to a turboprop before it’s promoted to an open turbofan and touted as a major new innovation?