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Forum: The Pacific: General Aviation & Questions

10th Jun 2016, 03:21

Replies: 47

Chieftain power setting

Views: 16,675

Posted By Jabawocky

Interesting point to add to Walters comments,...

Interesting point to add to Walters comments, depending on load and RPM I have seen the actual spark with a 6 degree lag, but at typical cruise it is in the 4-5 range, so it should be noted that the...

Forum: The Pacific: General Aviation & Questions

9th Jun 2016, 02:41

Replies: 47

Chieftain power setting

Views: 16,675

Posted By Jabawocky

Lumpy….pretty much :ok: They probably need...

Lumpy….pretty much :ok:

They probably need about 4 degrees of retard. Now ask the LAME how the CASa dude will cope with that concept :}

Forum: The Pacific: General Aviation & Questions

7th Jun 2016, 22:35

Replies: 47

Chieftain power setting

Views: 16,675

Posted By Jabawocky

I bet that Diamond thing you have been flying is...

I bet that Diamond thing you have been flying is 2 x magneto Lycoming powered…..for other good reasons ;)

Forum: The Pacific: General Aviation & Questions

7th Jun 2016, 12:39

Replies: 47

Chieftain power setting

Views: 16,675

Posted By Jabawocky

Lumps, Best thing to do is go fly and record...

Lumps,

Best thing to do is go fly and record the result. Then YOU know what is correct.

As for Piper and their XX% performance for two mixture settings, this is not the only one. Makes you...

Forum: The Pacific: General Aviation & Questions

6th Jun 2016, 13:47

Replies: 47

Chieftain power setting

Views: 16,675

Posted By Jabawocky

George is of the view that piper used a guess...

George is of the view that piper used a guess from who knows where. There is correlation of the 14.9 factor, but back then he doubts they had used that much effort to get it wrong.

So best you...

Forum: The Pacific: General Aviation & Questions

5th Jun 2016, 11:30

Replies: 47

Chieftain power setting

Views: 16,675

Posted By Jabawocky

I just had a look at dyno data, 31" / 2400 and...

I just had a look at dyno data, 31" / 2400 and 16.5GPH was about 220-224 BHP.

I think you did another POH MYTH BUSTERS program :ok:

Seems to me at least the POH is predicated on the wrong...

Forum: The Pacific: General Aviation & Questions

5th Jun 2016, 10:54

Replies: 47

Chieftain power setting

Views: 16,675

Posted By Jabawocky

I just happen to be in a three letter town…..and...

I just happen to be in a three letter town…..and the one place on earth where the answers to such mysteries exist.

I will dig out a POH and also compare that to Dyno data before I double check...

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