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Forum: The Pacific: General Aviation & Questions

11th Jun 2016, 15:58

Replies: 47

Chieftain power setting

Views: 16,673

Posted By Walter Atkinson

I'm pretty sure they went with option "B", then...

I'm pretty sure they went with option "B", then refined with option "A" if things turned out differently than expected. Many times, the testing to find out if "A" was what they wanted was not...

Forum: The Pacific: General Aviation & Questions

9th Jun 2016, 14:29

Replies: 47

Chieftain power setting

Views: 16,673

Posted By Walter Atkinson

The J2BD does make rated power with the timing...

The J2BD does make rated power with the timing the way it is. Actually, the retarded effective timing helps it produce more power at TO power. Most engines can make more power with slightly...

Forum: The Pacific: General Aviation & Questions

9th Jun 2016, 03:45

Replies: 47

Chieftain power setting

Views: 16,673

Posted By Walter Atkinson

Sorry for the brain fart. The timing is set at...

Sorry for the brain fart. The timing is set at 20dBTDC and actually occurs at about 16dBTDC, obviously not at 16dATDC! I guess I got my As and Bs mixed up!!!

This probably happens as a result of...

Forum: The Pacific: General Aviation & Questions

7th Jun 2016, 22:37

Replies: 47

Chieftain power setting

Views: 16,673

Posted By Walter Atkinson

Concerning the dual-drive mags: They are...

Concerning the dual-drive mags:
They are properly timed at 20dBTDC. BUT, the sparks actually occur at approximately 16dATDC. This is quite probably not known by Lycoming. (Actually, I'm very,...

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