On Sunday, October 13, 2013 3:22:16 PM UTC+1, chuck wrote:
For an ASW20:

Thermal flap on downwind.
Landing flap on final.

Why would you want thermal flap downwind in a 20? You're probably flying at 55 kts - so neutral flap gives better performance and handling. Thermal flap or landing flap on final, sure, depending on the conditions and desired approach speed.

Personally I almost never use full landing flap - but position 5 instead. Having said that, I fly a 20F, and I think later versions of the 20 had less flap in the landing flap position.

Paul