In article Bwq0d.166098$Fg5.68105@attbi_s53, Michael 182 wrote:
Hit a mountain wave today near Pikes Peak at FL190 in my TR-182. First I
couldn't maintain FL190 (I only have 300-400 fpm climb at that altitude
anyway) as my indicated airspeed descended to 80 K.

Speed up in sink, slow down in lift is the general rule (OK, you
probably don't want to slow down in lift if you're on an ifr flight plan
- but if you speed up in the sink, or at least maintain your cruise
speed rather than slowing to 80 kts you'll lose less altitude.

Used this sort of thing to good effect in my C140 which was decidedly
lacking in power when crossing the mounains in the western US.

--
Dylan Smith, Castletown, Isle of Man
Flying: http://www.dylansmith.net
Frontier Elite Universe: http://www.alioth.net
"Maintain thine airspeed, lest the ground come up and smite thee"