Pawnee Cooldown Procedures

On Sep 17, 5:59 am, Tim Hanke wrote:
We have acquired a 260 hp Pawnee for a towplane and was wondering what
others are doing for cool down after the sailplane releases...

Thanks,

Tim Hanke
Adirondack Soaring Group
Saratoga Springs, NY

I believe the Lycoming guidance is to cool down no faster than 50
degrees a minute (CHT). To accomplish this, after release we continue
to fly straight and level for one minute, reducing power to just keep
the RPM at or below red line. Then we start a decent at 100-120 mph
reducing power gradually until we enter the pattern. This allows us
to cool down at about 25 degrees a minute. Works for us. No cracked
cylinder heads.

Olin Kane
Durango Soaring Club
Durango, CO