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More About APS Classes with J. Deakin and friends.

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BobsV35B(at)aol.com
Guest

Posted: Sun Apr 30, 2006 8:36 pm Post subject: More About APS Classes with J. Deakin and friends.

Good Evening Again Folks,

 

A few minutes ago I sent a message recommending that everyone go to the APS  

website to easily access John Deakin's engine management articles that were  

originally on AvWeb.  I just checked to see if my advice was good and find  

that they have realigned the website. John's articles are no longer on the home  

page. You need to click on the TECH button then look for the blurb on the 

lower  left side of the page that has all of the pertinent Deakin articles.



 

In a message dated 4/30/2006 10:48:08 P.M. Central Standard Time, Bobs V35B  

writes:



Good  Evening Rob and Brock,  



May I suggest a short cut to John's articles and the course which he,  Walter 

Atkinson and George Braly provide in Ada, Oklahoma?

 

Try: _http://www.advancedpilot.com/_ (http://www.advancedpilot.com/) 

 

Happy  Skies,



Old Bob

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rsrandazzo(at)precisionma
Guest

Posted: Mon May 01, 2006 12:17 am Post subject: More About APS Classes with J. Deakin and friends.

Old Bob-



Thank you-  just ran all 56 pages out the printer....  I'm off to find a

comfortable chair to sit and read.



Rob

 



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n395v

Joined: 10 Jan 2006
Posts: 450

Posted: Mon May 01, 2006 4:14 am Post subject: Re: More About APS Classes with J. Deakin and friends.

ROP/LOP is the equivalent to High Wing/Low Wing or Taildragger/Nosewheel when it comes to never ending debate.



The difference heree is that Deakin and Braley have brought scientific data and theory to the table to support LOP.



This, in my opinion, is especially important in the 520K engines given that you are beating 435 HP out of 520 CID.



The two things LOP do in this situation are reduce temps EGT & CHT and reduce internal pressure in the cylinder without a significant sacrifice of HP or speed.



Every mechanic I have ever talked to (save Braley/Deakin) has had a knee jerk negative towards LOP and their justification is the MFG recommendations.



My own experience running 520 Continentals has been ROP=frequent jug replacement. LOP= longer jug and cylinder life.



You are doing what is correct.... educate yourself and base your own decisions on knowledge.



Many advised me not to buy a 685 as they recited a littany of problems and bad flight characteristics of the 685.  Not a single advice giver had ever seen one much less flown one. But they all "heard" they were bad airplanes.



OWT is what they had been hearing.



Read the literature and decide for yourself. After all you will be buying the new engines/jugs/etc. based on the decisions you make.



Rob,



The receipt from Commander Aero and AD info on 414C is on it's way.

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_________________
Milt

BobsV35B(at)aol.com
Guest

Posted: Mon May 01, 2006 6:04 am Post subject: More About APS Classes with J. Deakin and friends.

Good Morning Milt,  



This is almost a dreaded 'Me Too' message, but I would like to add that all  

engine manufacturers have always recommended lean side operations under 

certain  conditions.

 

The Church of Ada has brought such data to the forefront and supplemented  it 

with hard new data specifically oriented towards the style of engines we  

operate. 

 

I spent many thousands of hours carefully operating big round engines well  

on the lean side of best power. The EGT gauge was not common or we would surely 

 have used it to help find the sweet spot.

 

I am convinced that every present day mechanic and pilot should study the  

data presented and then decide how they want to operate the engine they are  

associated with. The course is general enough such that aviation users of all  

experiences can gain considerable knowledge.

 

Personally, I agree with Wolfgang on pitch and power, but I don't throw  away 

any hints from the other camp!

 

Happy  Skies,



Old Bob

AKA

Bob Siegfried

Ancient Aviator

Stearman  N3977A

Brookeridge Air Park LL22

Downers Grove, IL 60516

630  985-8503



 

In a message dated 5/1/2006 7:16:37 A.M. Central Standard Time,  

n395v(at)hughes.net writes:



ROP/LOP  is the equivalent to High Wing/Low Wing or Taildragger/Nosewheel 

when it comes  to never ending debate.



The difference here is that Deakin and Braly  have brought scientific data 

and theory to the table to support  LOP.

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nico(at)cybersuperstore.c
Guest

Posted: Mon May 01, 2006 7:37 am Post subject: More About APS Classes with J. Deakin and friends.

Good advice, Milt.



The same thing happens with Twin Comanches. Rumors say that it's a bastard

to land, but no one that told that story (to me at least) has ever owned or

flown one. I have owned and flown a Twin Comanche for long time and my

findings are that it wouldn't allow the pilot to doze off and expect the

plane to land itself - ala C 172. And I'm fine with that.



Nico



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