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How to enter a Thrust figure in the FMC? (Read 4318 times)

sax702 Full Member Offline Posts: 18 Joined: Dec 23^rd, 2018	How to enter a Thrust figure in the FMC? Aug 22^nd, 2020 at 10:09pm	Print Post
	I've tried several formats and get INVALID ENTRY. Can't find where in the manual this is covered. Appreciate any help.


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Alex T Senior Member Offline Posts: 415 Location: Boston, MA Joined: Jun 21^st, 2015 Gender:	Re: How to enter a Thrust figure in the FMC? Reply #1 - Aug 22^nd, 2020 at 10:19pm	Print Post
	sax702 wrote on Aug 22^nd, 2020 at 10:09pm: I've tried several formats and get INVALID ENTRY. Can't find where in the manual this is covered. Appreciate any help. What number are you putting in?


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sax702 Full Member Offline Posts: 18 Joined: Dec 23^rd, 2018	Re: How to enter a Thrust figure in the FMC? Reply #2 - Aug 23^rd, 2020 at 12:30am	Print Post
	I'm putting in temperatures, i.e., 70, 58. The manual says it's optional to enter a C or an F like in 70C. The CDU will take two figures for Centigrade and three for Fahrenheit. After my original post I found the location in the manual where this is addressed. It's in Aircraft Systems, page 92, in section 10. TAKEOFF.


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Markoz CS Team Offline Posts: 12364 Location: Victoria, Australia Joined: Apr 24^th, 2009 Gender:	Re: How to enter a Thrust figure in the FMC? Reply #3 - Aug 23^rd, 2020 at 3:12am	Print Post
	My I understanding of the instructions are that adding the "C" is optional, but adding the "F" is a must: Celsius entries cue I or 2 character between 0-99, optionally suffixed by "C". Valid Fahrenheit entries are 1. 2. or 3 character integers between 0-99 suffixed by “F". because the word "optionally" only occurs in the sentence about Celsius, and not in the sentence about Fahrenheit.

	Mark Fletcher PC: i7 10700K @3.8/5.1GHz \| 64GB DDR4 3200 \| 12GB RTX 4070 Super \| 32" LCD Monitor \| 1TB SSD & 2x2TB SSD \| Win 11 Pro - FSX/FSX-SE/P3D3/P3D4/P3D5/P3D6/MSFS2020 15.6" Gaming Laptop: i7 7700HQ \| 32GB DDR4 \| 6GB GTX 1060 \| 256GB SSD & 1TB HDD \| Win 10 Pro 64bit - FSX-SE/P3D4
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Alex T Senior Member Offline Posts: 415 Location: Boston, MA Joined: Jun 21^st, 2015 Gender:	Re: How to enter a Thrust figure in the FMC? Reply #4 - Aug 24^th, 2020 at 12:01am	Print Post
	Yeah something is broken now, I'm noticing suddenly evey degree of assumed temperature now reduces the EPR by 0.01. So today where the outside temp was 28, it wouldn't take anything above 48. It wasn't like this before, it seemed almost perfect before the last update. My takeoff performance calculator is asking me to put in 53 and it won't take it.


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sax702 Full Member Offline Posts: 18 Joined: Dec 23^rd, 2018	Re: How to enter a Thrust figure in the FMC? Reply #5 - Aug 24^th, 2020 at 2:34am	Print Post
	Markoz wrote on Aug 23^rd, 2020 at 3:12am: My I understanding of the instructions are that adding the "C" is optional, but adding the "F" is a must: Celsius entries cue I or 2 character between 0-99, optionally suffixed by "C". Valid Fahrenheit entries are 1. 2. or 3 character integers between 0-99 suffixed by “F". because the word "optionally" only occurs in the sentence about Celsius, and not in the sentence about Fahrenheit. That's is correct. "F" must be entered when using Fahrenheit. I'm using Celsius. Yet I get the INVALID ENTRY no matter what.


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sax702 Full Member Offline Posts: 18 Joined: Dec 23^rd, 2018	Re: How to enter a Thrust figure in the FMC? Reply #6 - Aug 24^th, 2020 at 2:35am	Print Post
	Markoz wrote on Aug 23^rd, 2020 at 3:12am: My I understanding of the instructions are that adding the "C" is optional, but adding the "F" is a must: Celsius entries cue I or 2 character between 0-99, optionally suffixed by "C". Valid Fahrenheit entries are 1. 2. or 3 character integers between 0-99 suffixed by “F". because the word "optionally" only occurs in the sentence about Celsius, and not in the sentence about Fahrenheit. That's correct. "F" must be entered when using Fahrenheit. I'm using Celsius. Yet I get the INVALID ENTRY no matter what.


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CaptBel4 Full Member Offline Posts: 11 Joined: Jul 10^th, 2020	Re: How to enter a Thrust figure in the FMC? Reply #7 - Aug 27^th, 2020 at 10:27pm	Print Post
	I experimented and nothing worked for me either.


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sax702 Full Member Offline Posts: 18 Joined: Dec 23^rd, 2018	Re: How to enter a Thrust figure in the FMC? Reply #8 - Aug 31^st, 2020 at 8:35pm	Print Post
	Here's what I've seen so far with version 1.0: entered 62, received INVALID ENTRY. Entered 62C, received INVALID ENTRY. Entered 62 again and it took it! This worked also on version .99 for one flight, but not when I tried again on a follow up flight. At that time I noticed that it would work if I entered a temperature less than 50C. Hope this helps the team diagnose the issue.


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Markoz CS Team Offline Posts: 12364 Location: Victoria, Australia Joined: Apr 24^th, 2009 Gender:	Re: How to enter a Thrust figure in the FMC? Reply #9 - Aug 31^st, 2020 at 10:46pm	Print Post
	This is with v1.0 in P3Dv4.5 I did noget an INVALID ENTRY when entering 62, or 62C. Every time I enter a number between 50 and 99, without adding a C to it, it enters fine, and the D-TO is entered as XX ^oC (i.e. 63 ^oC D-TO). But... If I added the F to the number, providing the number was 59 to 99, it is entered with the ^oF added (i.e. 64F entered as 64 ^oF D-TO). The one strange thing I did notice, was that only the even numbers worked (of those I tried between 66F and 74F). i.e. 66F, 68F, ... 74F. Entering the odd number, it added 1^o to the entry. i.e. 65F would enter as 66^oF, etc. Entering 59F I got 59 ^oF D-TO. When I entered 60F, it entered 61 ^oF, 61F would also enter as 61^oF. 62F, and 63F would enter as 63^oF. 64F entered as 64^oF. 65F, and 66F would enter as 66^oF, etc.. I tried this up to 74F. So all in all, I'm getting the D-TO somewhat okay.

	Mark Fletcher PC: i7 10700K @3.8/5.1GHz \| 64GB DDR4 3200 \| 12GB RTX 4070 Super \| 32" LCD Monitor \| 1TB SSD & 2x2TB SSD \| Win 11 Pro - FSX/FSX-SE/P3D3/P3D4/P3D5/P3D6/MSFS2020 15.6" Gaming Laptop: i7 7700HQ \| 32GB DDR4 \| 6GB GTX 1060 \| 256GB SSD & 1TB HDD \| Win 10 Pro 64bit - FSX-SE/P3D4
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sax702 Full Member Offline Posts: 18 Joined: Dec 23^rd, 2018	Re: How to enter a Thrust figure in the FMC? Reply #10 - Sep 1^st, 2020 at 7:43pm	Print Post
	On a flight today I entered 60 and it worked. I entered it as the first thing I entered on that page. Again, I only entered 60, no "C". Thank you Markoz for your detailed post.


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Markoz CS Team Offline Posts: 12364 Location: Victoria, Australia Joined: Apr 24^th, 2009 Gender:	Re: How to enter a Thrust figure in the FMC? Reply #11 - Sep 2^nd, 2020 at 1:44am	Print Post
	Entering the de-rated thrust was the last thing I did on the page when I got the results in my previous post.

	Mark Fletcher PC: i7 10700K @3.8/5.1GHz \| 64GB DDR4 3200 \| 12GB RTX 4070 Super \| 32" LCD Monitor \| 1TB SSD & 2x2TB SSD \| Win 11 Pro - FSX/FSX-SE/P3D3/P3D4/P3D5/P3D6/MSFS2020 15.6" Gaming Laptop: i7 7700HQ \| 32GB DDR4 \| 6GB GTX 1060 \| 256GB SSD & 1TB HDD \| Win 10 Pro 64bit - FSX-SE/P3D4
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sax702 Full Member Offline Posts: 18 Joined: Dec 23^rd, 2018	Re: How to enter a Thrust figure in the FMC? Reply #12 - Sep 17^th, 2020 at 2:41am	Print Post
	Happy to inform that I've been able to enter the de-rated thrust in all my flights without any problems. Now, I just need to find a good calculator for it. TOPCAT isn't computing correct figures for this bird. Does anyone know of an alternative that would work with the CS B767-300ER v1.0?


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Alex T Senior Member Offline Posts: 415 Location: Boston, MA Joined: Jun 21^st, 2015 Gender:	Re: How to enter a Thrust figure in the FMC? Reply #13 - Sep 17^th, 2020 at 12:05pm	Print Post
	sax702 wrote on Sep 17^th, 2020 at 2:41am: Happy to inform that I've been able to enter the de-rated thrust in all my flights without any problems. Now, I just need to find a good calculator for it. TOPCAT isn't computing correct figures for this bird. Does anyone know of an alternative that would work with the CS B767-300ER v1.0? Topcat has always been accurate for me on this bird! I made a post with video evidence showing how close it was to CS figures. Are you using the right settings? PW4060 and UNCHECK combination derate/ assumed temp?


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sax702 Full Member Offline Posts: 18 Joined: Dec 23^rd, 2018	Re: How to enter a Thrust figure in the FMC? Reply #14 - Sep 17^th, 2020 at 12:08pm	Print Post
	Thank you Alex. I've changed TOPCAT to your settings. Will report back.


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Yannes2812-GER Full Member Offline Posts: 19 Location: Germany Joined: Jun 1^st, 2021 Gender:	Re: How to enter a Thrust figure in the FMC? Reply #15 - Jun 1^st, 2021 at 7:26pm	Print Post
	Hey, when using TOPCAT, I always get thrust figures that are way to weak to keep the bird in the air. It always uses the full(and I mean full) runway on takeoff and the aircraft does not climb properly. Could somebody post a screenshot of his TOPCAT settings for the 763?

	Greetings from Germany! Yannes B Home airport: EDVE/EDDV
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Alex T Senior Member Offline Posts: 415 Location: Boston, MA Joined: Jun 21^st, 2015 Gender:	Re: How to enter a Thrust figure in the FMC? Reply #16 - Jun 6^th, 2021 at 12:12am	Print Post
	A few posts back I mention how to configure it. Never use Derate + assumed.


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Yannes2812-GER Full Member Offline Posts: 19 Location: Germany Joined: Jun 1^st, 2021 Gender:	Re: How to enter a Thrust figure in the FMC? Reply #17 - Jun 7^th, 2021 at 11:10am	Print Post
	I know, but when it comes to a heavy take-off, the derate causes my aircraft to stall when handing over the control to the autopilot when the acceleration is still to be passed...

	Greetings from Germany! Yannes B Home airport: EDVE/EDDV
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Yannes2812-GER Full Member Offline Posts: 19 Location: Germany Joined: Jun 1^st, 2021 Gender:	Re: How to enter a Thrust figure in the FMC? Reply #18 - Jun 8^th, 2021 at 12:06pm	Print Post
	Look at the EPR difference - I have to enter a temperature of 29 degrees to get the EPR of 1.50 (which is the value that TOPCAT gives me for an assumed temperature of 44 degrees)

	Screenshot_2021-06-08_140503.png ( 1178 KB \| 48 Downloads ) Greetings from Germany! Yannes B Home airport: EDVE/EDDV
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Yannes2812-GER Full Member Offline Posts: 19 Location: Germany Joined: Jun 1^st, 2021 Gender:	Re: How to enter a Thrust figure in the FMC? Reply #19 - Jun 8^th, 2021 at 12:07pm	Print Post
	This is the topcat window

	Screenshot_2021-06-08_140518.png ( 77 KB \| 45 Downloads ) Greetings from Germany! Yannes B Home airport: EDVE/EDDV
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Yannes2812-GER Full Member Offline Posts: 19 Location: Germany Joined: Jun 1^st, 2021 Gender:	Re: How to enter a Thrust figure in the FMC? Reply #20 - Jul 1^st, 2021 at 10:06am	Print Post
	No help?

	Greetings from Germany! Yannes B Home airport: EDVE/EDDV
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spence Full Member Offline Posts: 40 Joined: Dec 26^th, 2011 Gender:	Re: How to enter a Thrust figure in the FMC? Reply #21 - Jul 16^th, 2021 at 7:51pm	Print Post
	The Topcat Values don't agree with the CS 767, for that reason I match based on EPR and not flex temp.


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Angel of Attack Full Member Offline Posts: 249 Joined: Dec 15^th, 2019	Re: How to enter a Thrust figure in the FMC? Reply #22 - Jul 19^th, 2021 at 12:57am	Print Post
	The EPR vs Temp also not match the simple table I can find on realworld table find on both FPPM and QRH


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Yannes2812-GER Full Member Offline Posts: 19 Location: Germany Joined: Jun 1^st, 2021 Gender:	Re: How to enter a Thrust figure in the FMC? Reply #23 - Jul 22^nd, 2021 at 9:41am	Print Post
	spence wrote on Jul 16^th, 2021 at 7:51pm: The Topcat Values don't agree with the CS 767, for that reason I match based on EPR and not flex temp. That is the way I do it now, too

	Greetings from Germany! Yannes B Home airport: EDVE/EDDV
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