lml@lancaironline.net Mailing List Archive

Art:

Wow, you've done quite a good job.

Yes, we've worked with that, too. It seems as though the most effective action is to streamline the exit air and improve the deltaP. It's about the only thing we see that makes enough difference to be worth the effort. It really helps to reduce inlet air to the point that you let no more air INTO the cowl than necessary to do the job of cooling.

Walter

On Apr 24, 2007, at 5:18 PM, Art Bertolina wrote:

I have used most of the ideas from George Braly engine

cooling seminar of Oct/04 for TSIO 550 installations in

L IVs. Over the last several months flying in So. Calif.

at 15500 to 17500 at 2500RPM and 31" MAP and 19gph

in cruise CHTs run from 264 to 305 oil temp 160 hottest

TIT 1595, 80 to 90 LOP.

Has anyone done any work with cooling drag. Directing the

air flow above the engine has a positive effect, has anyone

tried to direct the air flow as it exits the bottom of the engine?, if so with what effect?. Tried closing

down the exit area and again with any positive effect.

Thoughts and comments would be appreciated.

Art