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EPR auto take off not working (Read 5191 times)

BrianG Full Member Offline Posts: 205 Joined: Mar 10^th, 2011 Gender:	EPR auto take off not working Aug 29^th, 2011 at 5:45pm	Print Post
	Hi, Been doing fine programming FMC and using the EPR button on the MPC for doing auto- takeoff. Everything works as expected. Now,all of a sudden when I use I press the EPR button the throttle levers move up and down and will not sustain take off thrust. It's analogous to the foot on and off the gas pedal of a car. T/O thrust is set, auto throttle engaged, and the FMC says complete. I haven't been doing anything different from the times it was working just fine. . Any ideas here?


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R. Aranda S. Full Member Offline Posts: 206 Location: MMMX Joined: Jul 21^st, 2011 Gender:	Re: EPR auto take off not working Reply #1 - Aug 29^th, 2011 at 8:46pm	Print Post
	Hello, I noticed this a while ago... the EPR will set the thrust but the levers will go down causing your RTO autobrake to activate. I always N1 +- 80% manually, engage the EPR and then I have no problem.

	R. Aranda S. C152/C172/C310/B762
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BrianG Full Member Offline Posts: 205 Joined: Mar 10^th, 2011 Gender:	Re: EPR auto take off not working Reply #2 - Aug 29^th, 2011 at 10:12pm	Print Post
	Fixed the problem. I reset the V-speeds in the FMC and its working once more. Don't even have to manually apply any throttle. I don't know how its supposed to work in real life but that how mine works ( for now). I push the EPR button and it sails right down the runway and into the air. Quirky stuff I'd say.


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Markoz CS Team Offline Posts: 12373 Location: Victoria, Australia Joined: Apr 24^th, 2009 Gender:	Re: EPR auto take off not working Reply #3 - Aug 30^th, 2011 at 5:07am	Print Post
	BrianG wrote on Aug 29^th, 2011 at 10:12pm: I don't know how its supposed to work in real life but that how mine works ( for now). I push the EPR button and it sails right down the runway and into the air. I think that in real life, you are supposed to manually push the throttle levers to 80% N1, THEN engage the Autothrottle. However, I just press the EPR button and let it control the throttles from the start. The main reason I do that is because when I used to press the EPR button AFTER I had throttled up to 80%, if I pulled the throttles back to idle, the Autothrottle would stop working until I returned the throttle levers up to MAX. I'm glad you got the problem fixed. Mark

	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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Hawkwind Full Member Offline Posts: 110 Location: Christchurch, UK Joined: Feb 16^th, 2008 Gender:	Re: EPR auto take off not working Reply #4 - Aug 30^th, 2011 at 7:03pm	Print Post
	Will have to re-try this one as every time I've used it I always end up manually using the throttle!!

	Regards,&&&&James&&&&
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Capt. Braga Full Member Offline Posts: 33 Location: Miami Joined: May 7^th, 2011 Gender:	Re: EPR auto take off not working Reply #5 - Sep 3^rd, 2011 at 12:05am	Print Post
	Same problem here, but I`ll give a try as you guys mention. Thanks, TB


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Capt. Braga Full Member Offline Posts: 33 Location: Miami Joined: May 7^th, 2011 Gender:	Re: EPR auto take off not working Reply #6 - Sep 3^rd, 2011 at 12:26am	Print Post
	Problem fixed. Yes , you have to pull throttle to 80kts and engage the EPR. Thanks guys, TB


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Markoz CS Team Offline Posts: 12373 Location: Victoria, Australia Joined: Apr 24^th, 2009 Gender:	Re: EPR auto take off not working Reply #7 - Sep 3^rd, 2011 at 2:03am	Print Post
	Capt. Braga wrote on Sep 3^rd, 2011 at 12:26am: Problem fixed. Yes �, you have to pull throttle to 80kts and engage the EPR. Thanks guys, TB Strange! I just sit at the start of the runway and press the EPR button, without touching the throttles, and away she goes.

	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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Capt. Braga Full Member Offline Posts: 33 Location: Miami Joined: May 7^th, 2011 Gender:	Re: EPR auto take off not working Reply #8 - Sep 3^rd, 2011 at 7:12pm	Print Post
	Very, because I used to do the exact way you are doing it. But all of sudden it stoped working. Now the lights are all messed up. I think it is because I installed the shockwave lights 3D. Any updates? Thanks,


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BrianG Full Member Offline Posts: 205 Joined: Mar 10^th, 2011 Gender:	Re: EPR auto take off not working Reply #9 - Sep 4^th, 2011 at 1:37am	Print Post
	Now, sometimes I have to go up to 80-85% N1 before it will work properly and other times I just set the throttle to idle and it works. It varies from day to day. Pay attention to how you have your throttles set when opening up the 767. Some day's if the levers are pushed all the way forward before opening the program, N1 will reflect idle, and I push the EPR button and off it goes. �But then other times if the program opens with throttles pushed all the way forward I'll get 100+% on N1. I can't figure this thing out. There's not a lot of consistency. If in real life you're expected to set throttles manually to 80% then I guess that's the way it should be. Does the manual give any answers here? If so I missed it.


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Pinatubo Senior Member Offline Posts: 486 Location: Rio de Janeiro Brazil Joined: Apr 29^th, 2010 Gender:	Re: EPR auto take off not working Reply #10 - Sep 4^th, 2011 at 1:56am	Print Post
	Very strange issue. I always use [EPR] button without need to move throttle levers and it always works.

	My fleet (CS and from others developers): L1011; B777-200/F; B777-200/F (LR); MD-11/F;B737-600/700/800/900NG; B767-300/200/F/KC ; B757-300/200/F ; C130 X-perience All-In-One; B707-300/300C; B727-100/200; B737-200/200ADV; WX Radar
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