Clothes dryers that reverse rotation while drying
A dryer can be much better designed if it only runs in one direction it will dry clothing, faster, and more efficiently and as much less complex and problems prone.
There have been a few attempts in the US to make a reversing dryer none of ever been terribly successful. Last week had to work on a 1999 Frigidaire gallery gas dryer that reversed. What a pain in the neck work on and overly complicated. Frigidaire abandoned this design pretty quickly because it didn’t make any difference and only caused problems.
The only reason frontloading washers typically reverse is because it’s so darn easy it doesn’t add to the complexity, but they still can tangle. There’s no magic formula if it turns so many times and so many times the other way it won’t ball up things so there’s really no benefit even in a washing machine, but not much disadvantage either.
John