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Forum: The Pacific: General Aviation & Questions

16th Nov 2021, 00:55

Replies: 47

Chieftain power setting

Views: 16,673

Posted By Lumps

Interesting, have not found any such reference in...

Interesting, have not found any such reference in the newer manual where LOP is prescribed but maybe they were too busy at Piper back then for these little details. Like deleting the climb power...

Forum: The Pacific: General Aviation & Questions

12th Jun 2016, 07:59

Replies: 47

Chieftain power setting

Views: 16,673

Posted By Lumps

well that does surprise me. Thanks for your input...

well that does surprise me. Thanks for your input fellas, will go out and fly the test card shortly!

Forum: The Pacific: General Aviation & Questions

10th Jun 2016, 02:28

Replies: 47

Chieftain power setting

Views: 16,673

Posted By Lumps

bring on PRISM makes you wonder how the...

bring on PRISM

makes you wonder how the engineers designing these engines arrived at the actual degrees BTDC:

A) Trying various timing positions and seeing what resulted in the optimum...

Forum: The Pacific: General Aviation & Questions

9th Jun 2016, 12:40

Replies: 47

Chieftain power setting

Views: 16,673

Posted By Lumps

Heretic! So with the (thankfully) retarded...

Heretic!

So with the (thankfully) retarded timing does the J2BD actually make 350bhp on the dyno - Or did the J series start life with separate mags and then no one checked when the single drives...

Forum: The Pacific: General Aviation & Questions

8th Jun 2016, 12:12

Replies: 47

Chieftain power setting

Views: 16,673

Posted By Lumps

Plus one. Or I gotta go back to school. Jaba...

Plus one. Or I gotta go back to school.

Jaba I take it the lower TIT for the separate mags means they are more advanced (dynamically anyway) as what Walter was eluding to? So Colemill = not so...

Forum: The Pacific: General Aviation & Questions

7th Jun 2016, 12:01

Replies: 47

Chieftain power setting

Views: 16,673

Posted By Lumps

My theory is a little different: The 65% (230...

My theory is a little different: The 65% (230 bhp) column lists two airspeeds, best power, best economy. Obviously 230bhp is 230bhp no matter where the mixture is, the airspeed should be the same for...

Forum: The Pacific: General Aviation & Questions

6th Jun 2016, 11:56

Replies: 47

Chieftain power setting

Views: 16,673

Posted By Lumps

Good stuff! Wish I could too. While you're there...

Good stuff! Wish I could too. While you're there if you could ask GB why the single drive, dual mags (J2BD) have different characteristics as far as running LOP etc is concerned, I'd love to know....

Forum: The Pacific: General Aviation & Questions

5th Jun 2016, 00:42

Replies: 47

Chieftain power setting

Views: 16,673

Posted By Lumps

Chieftain power setting

Can someone explain this to me:

In the Piper Chieftain POH, for 65% power (230BHP) it lists 'best economy' fuel flow as 30.8 GPH (both engines). Seeing as the POH specifically prescribes LOP...

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