Hot CHT's, bonding AL to Cylinder for improved flow
Hot CHT's, bonding AL to Cylinder for improved flow
(OP)
We are testing a turbo normalized system on a TCM IO-550 engine. At 25,000 FT, the converted CHT and OIL Temps. per FAR 23 are above the redline. We have enlarged the inlet and cowl flap areas and it did improve the temps., but did not lower them to a desirable value. Instead of re-enlarging the areas and increasing the cooling drag, I am thinking of modifying the baffle between the cylinders to prevent the airflow from flowing down between the cylinders. i.e: blocking that area. To modify the existing engine supplied Baffle I think will be a hassle. I am thinking of just bonding a piece of aluminum between each cylinder to accomplish that task and see if it will have any noticeable effect. My concern is if the bond will be able to withstand the high temp/vibration loads. Does anyone have any experience in this area and/or some thoughts about this?
Any input is well appreciated, thank you in advance.
P.S: As this subject is related to thermo and aircraft engineering, I will post this thread in both forms.
Any input is well appreciated, thank you in advance.
P.S: As this subject is related to thermo and aircraft engineering, I will post this thread in both forms.





RE: Hot CHT's, bonding AL to Cylinder for improved flow
what happens to the cylinders without cooling?
regards
Jay Maechtlen
RE: Hot CHT's, bonding AL to Cylinder for improved flow
I am assuming I am telling you something you already know. But, just in case;
Make sure, you have the maximum fuel flow requirements set up properly. It is very important that you have the engine set up so you do flow fuel at the red line values. And, check the calibration of the fuel flow meters you use. Most cockpit fuel flow meters are pressure gages.
RE: Hot CHT's, bonding AL to Cylinder for improved flow
http://www.avweb.com/news/columns/182544-1.html
RE: Hot CHT's, bonding AL to Cylinder for improved flow
That link looks good, I will check it out.
Regards
Raffi A