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rwahlgren
Joined: 15 Aug 2003 Posts: 323
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Posted: Fri Dec 07, 2012 18:20 Post subject: Chrysler Aircraft Engines, by Kimble D. McCutcheon |
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Anyone that is interested in Engines, will want this book.
It helps show the painstaking process of the Aircraft Engine design world during the war.
It is very evident that Kim spent alot of time researching for this book. |
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wallan
Joined: 13 Jul 2003 Posts: 252 Location: UK
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Posted: Mon Dec 10, 2012 07:43 Post subject: |
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I've got a copy on order. |
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cmalott
Joined: 20 Dec 2005 Posts: 8
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Posted: Sat Dec 29, 2012 00:17 Post subject: Kim's book |
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Not too obvious how to order Kim's book on
Chryser engs. How do you do it?
cmalott |
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kmccutcheon
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Joined: 13 Jul 2003 Posts: 298 Location: Huntsville, Alabama USA
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Posted: Sat Dec 29, 2012 07:53 Post subject: Re: Kim's book |
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cmalott wrote: | Not too obvious how to order Kim's book on
Chryser engs. How do you do it?cmalott |
On the AEHS web site home page, click on the - Details - link.
A new page will appear that solicits a username and password.
Enter your username and password, click Submit.
An order form will appear that allows either an electronic ordering or the printing of a paper mail order form.
Cheers, _________________ Kimble D. McCutcheon |
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ckuhns
Joined: 13 Jul 2003 Posts: 36
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Posted: Sun Jan 06, 2013 19:52 Post subject: specific fuel consumption |
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Question about the SFC of the XL-2220. On page 114 several SFCs of .09 lb/hp/hr, .105lb/hp/hr and .093lb/hp/hr are listed. I beleive the Wright Turb compound was one of the most efficent gasoline engines with a Sfc of .40 lb/hp/hr. What am I missing? Carl |
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kmccutcheon
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Joined: 13 Jul 2003 Posts: 298 Location: Huntsville, Alabama USA
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Posted: Mon Jan 07, 2013 08:22 Post subject: Re: specific fuel consumption |
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ckuhns wrote: | Question about the SFC of the XL-2220. On page 114 several SFCs of .09 lb/hp/hr, .105lb/hp/hr and .093lb/hp/hr are listed. I beleive the Wright Turb compound was one of the most efficent gasoline engines with a Sfc of .40 lb/hp/hr. What am I missing? Carl |
You are actually catching something. I have confused fuel/air ratios with SFC. The paragraph should read
An extremely rich mixture of 0.09+ fuel/air had been used throughout the run-in. Chrysler explained that the high fuel consumption at 2,300 hp and 110°F CAT (0.105 fuel/air) while 2,500 hp and 70°F CAT only required a fuel/air ratio of 0.093. Backfire screens had been cleaned at the end of two hours time and were found to be satisfactory at test completion.
Good catch, Carl. _________________ Kimble D. McCutcheon |
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ckuhns
Joined: 13 Jul 2003 Posts: 36
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Posted: Tue Jan 08, 2013 17:34 Post subject: Fuel air mixture |
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Kim, Thanks for your reply. What would that be in whole numbers? I was thinking the idea air/fuel mixture was 14.7 /1. Any number below 14.7 was a rich mixture and a mixture like 15.5/1 was a lean one. thanks Carl |
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kmccutcheon
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Joined: 13 Jul 2003 Posts: 298 Location: Huntsville, Alabama USA
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Posted: Wed Jan 09, 2013 08:06 Post subject: Re: Fuel air mixture |
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ckuhns wrote: | Kim, Thanks for your reply. What would that be in whole numbers? I was thinking the idea air/fuel mixture was 14.7 /1. Any number below 14.7 was a rich mixture and a mixture like 15.5/1 was a lean one. thanks Carl |
Whole numbers (Air/Fuel ratios) would be the reciprocal of the Fuel/Air ratios, i.e., 0.09 F/A = 11.11:1 A/F; 0.105 F/A = 9.52:1 A/F; 0.093 F/A = 10.75:1 A/F.
We are taught that engines ideally run at an A/F ratio of 14.7:1 (0.068 F/A), but they rarely do. They must be significantly richer to idle, and almost always use extra fuel to prevent detonation and misfire at high powers.
Curves on pages 135 and 136 illustrate this point, and also show the experimental variation between flow bench runs on the same carburetor(p135) and runs of different engines with identical setups (p136). _________________ Kimble D. McCutcheon |
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ckuhns
Joined: 13 Jul 2003 Posts: 36
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Posted: Fri Jan 11, 2013 18:27 Post subject: |
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Thanks Kim, You have answered my question Carl |
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