Msg ID:
2799422 |
Flying a twin with one engine at idle +3/-16
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Author:Ferry flight
11/21/2023 7:26:36 PM
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Hey guys. I'm in another country. FAA rules do not apply here. Lots of freedom here unlike in the USA. I have a ferry flight coming up in a Bell Medium and am having some fuel issues. I fuel out of barrels and I have a 320 nm leg tomorrow. Have any of you found if you go to idle with one engine and 100% (or so maybe a touch less) on the other, it saves you some quantifiable fuel? Looking for experienced pilots to help me out. |
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Msg ID:
2799424 |
Flying a twin with one engine at idle +4/-2
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Author:Anonymous
11/21/2023 7:42:09 PM
Reply to: 2799422
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Forget the FAA, what does the rfm and manufacturer say? That would be your first line of defense if something goes wrong. |
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Msg ID:
2799426 |
Flying a twin with one engine at idle +1/-2
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Author:OP
11/21/2023 7:44:08 PM
Reply to: 2799424
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Good call. Permissions for Single Engine Flight aren't really discussed in there. Some of those limits are suggestions and others are pretty hardline. |
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Msg ID:
2799433 |
Flying a twin with one engine at idle +2/-2
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Author:Thenswerisno
11/21/2023 8:29:58 PM
Reply to: 2799426
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turbine engines are most efficient at max power. If you could shut one down and maintain normal cruise speed you would gain distance. The more you go below normal cruise the less you will gain. Putting one at idle will hurt you. The engine will be burning fuel and doing nothing. |
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Msg ID:
2799434 |
Flying a twin with one engine at idle +0/-2
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Author:OP
11/21/2023 8:34:45 PM
Reply to: 2799433
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So are you saying that the idling engine should be shut down to provide maximum distance? |
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Msg ID:
2799441 |
Flying a twin with one engine at idle +1/-1
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Author:Reply
11/21/2023 8:59:17 PM
Reply to: 2799434
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Yes. An engine at idle is just wasting fuel. You need to shut one down to gain anything worthwhile. do the guy who said fly high you are correct if the aircraft can do it efficiently. I flew the dauphin. It did very well above 9000. The agusta 109 would actually do worse above around 7000 due to loss of efficiency of the rotor system. Fuel burn went down but speed dropped way down. |
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Msg ID:
2799460 |
Flying a twin with one engine at idle +2/-2
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Author:Anonymous
11/22/2023 9:17:18 AM
Reply to: 2799441
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Just wondering here, those of you that shut one engine down on long flights, are you logging different times between engines in your logbook? |
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Msg ID:
2799438 |
Flying a twin with one engine at idle +0/-2
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Author:cheap
11/21/2023 8:51:35 PM
Reply to: 2799422
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Winds permitting, fly high. |
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Msg ID:
2799442 |
Flying a twin with one engine at idle +1/-2
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Author:try putting feathers
11/21/2023 9:11:19 PM
Reply to: 2799422
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on the pedals bro |
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Msg ID:
2799443 |
Flying a twin with one engine at idle +1/-1
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Author:possible?
11/21/2023 9:42:23 PM
Reply to: 2799422
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Hi, Not a pilot but I probably could be if I wanted too; it looks easy enough.....
Anyhow - would it help to fly really high up gradually let off the gas to where it keeps flying, then maybe do one of those extended autorotations, add throttle to climb and repeat? Seems like there's enough sky out there to be feasible.. |
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Msg ID:
2799444 |
Flying a twin with one engine at idle +2/-3
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Author:The G Mail Guy
11/21/2023 9:48:44 PM
Reply to: 2799443
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Didn't the early 206 A or B's have a M/R range 95 to 100%. so you could beep the rotor down to save fuel? |
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Msg ID:
2799447 |
Flying a twin with one engine at idle +3/-1
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Author:olderendirt
11/21/2023 10:23:20 PM
Reply to: 2799422
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Performance I have a ferry flight coming up in a Bell Medium and am having some fuel issues. I fuel out of barrels and I have a 320 nm leg tomorrow. Have any of you found if you go to idle with one engine and 100% (or so maybe a touch less) on the other, it saves you some quantifiable fuel? Looking for experienced pilots to help me out.
"Bell medium" as in 212/412 or a 222/230? Those old engines ain't economical in idle. The RFM is your friend in this case- performance charts especially. Been decades since I had to calculate this, but here goes:
I'd copy and magnify the chart to do this (on paper in them old days)
RFM power chart, big bulge.
From the lower left, a line on a tangent to the power curve is your best shot, should give you a ground speed or power setting.
And you have to factor in the atmospherics, winds especially.
I'm a nervous sort but I'm also an old fart. I would go a long way around to have a comfortable fuel stop(s) on any leg... |
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Msg ID:
2799449 |
You could fly on one donk +0/-0
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Author:In this one..
11/22/2023 2:30:52 AM
Reply to: 2799447
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https://www.aopa.org/news-and-media/all-news/1994/july/pilot/gemini-st |
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Msg ID:
2799454 |
Either stop the rotor or feather it to reduce the drag (NT) +1/-2
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Author:[for best results]
11/22/2023 7:55:59 AM
Reply to: 2799447
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Msg ID:
2799463 |
Flying a twin with one engine at idle +1/-1
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Author:Pumper
11/22/2023 9:49:51 AM
Reply to: 2799422
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Just throw a couple of drums of fuel in the back seat. Then half way through the flight take a pee break and tranfer the fuel. |
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Msg ID:
2799471 |
Flying a twin with one engine at idle +2/-2
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Author:Or do everyone a favor
11/22/2023 11:48:00 AM
Reply to: 2799463
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Just turn them both off and pull the left handle all the way up. |
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Msg ID:
2799472 |
Flying a twin with one engine at idle +2/-1
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Author:both amazing and depressing
11/22/2023 12:30:12 PM
Reply to: 2799471
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people on here can't see this is a troll from a thousand miles out |
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Msg ID:
2799477 |
Flying a twin with one engine at idle +1/-2
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Author:Anonymous
11/22/2023 1:29:02 PM
Reply to: 2799472
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maybe, maybe not. it has been done before and I won't say who or where, but if that crusty old aviator is reading this, I know he is laughing as he takes another sip of beer. |
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Msg ID:
2799480 |
Flying a twin with one engine at idle +3/-1
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Author:good god
11/22/2023 1:32:24 PM
Reply to: 2799477
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I guess the old retards are just as dumb as the new retards |
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Msg ID:
2799484 |
Flying a twin with one engine at idle +2/-2
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Author:BK
11/22/2023 1:36:07 PM
Reply to: 2799480
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Are you one of the old farts or young retards? |
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Msg ID:
2799479 |
Flying a twin with one engine at idle +1/-1
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Author:It happened
11/22/2023 1:32:17 PM
Reply to: 2799472
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Years ago a Navy SH3 crew tried this stunt during a cross country flight to skip a fuel stop. They were doing ok until the remaining engine quit. Restarted while in an auto. Recovered. One of the crew turned the pilots in. Idiots. |
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Msg ID:
2799482 |
Flying a twin with one engine at idle +0/-1
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Author:restarted while in auto
11/22/2023 1:34:25 PM
Reply to: 2799479
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lol |
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Msg ID:
2799496 |
Flying a twin with one engine at idle +4/-4
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Author:so there I was
11/22/2023 4:30:01 PM
Reply to: 2799482
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flying along in a sea king on one engine to save fuel when the engine quit! we entered an auto and got the other engine started and flew away! of all the things that never happened, this never happened the most. lol I'm sure the crusty old aviator smiles and sips his beer while sitting in his own excrement. |
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Msg ID:
2799613 |
Flying a twin with one engine at idle +0/-0
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Author:DUh 2
11/23/2023 6:17:27 PM
Reply to: 2799496
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OK Mr. Junior Navy wannabeeee.......Captain........ |
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Msg ID:
2799511 |
Flying a twin with one engine at idle +1/-0
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Author:Interesting
11/22/2023 6:49:54 PM
Reply to: 2799422
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discussion. Some types have max se speeds. Depending on winds use LRC TE at the altitude that fits best TAS and play the ground speed. Choose a conservative PNR. If in a head wind use as much TE power as possible at favorable altitude. Not a fan of SE ferry flying. |
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Msg ID:
2799514 |
Flying a twin with one engine at idle +0/-2
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Author:it’s only interesting to retards
11/22/2023 7:23:17 PM
Reply to: 2799511
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that think this is something that actually happens |
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Msg ID:
2799515 |
Flying a twin with one engine at idle +2/-0
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Author:Why do you care?
11/22/2023 7:33:08 PM
Reply to: 2799514
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This really winds you up doesn't it? I guess when you haven't done anything except fly Robbie's the jelousy consumes you. |
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Msg ID:
2799594 |
Flying a twin with one engine at idle +1/-0
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Author:Such
11/23/2023 4:44:40 PM
Reply to: 2799514
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a response. Flex ur own imagination for a change, u might gain something. |
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Msg ID:
2799596 |
Flying a twin with one engine at idle +0/-0
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Author:I'm trying to imagine
11/23/2023 4:50:44 PM
Reply to: 2799594
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a situation where you would be dumb enough to fly a twin with two good engines just on one and not coming up with anything. you got any brilliant ideas, I'm listening. |
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Msg ID:
2799612 |
Flying a twin with one engine at idle +2/-0
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Author:Anonymous
11/23/2023 6:15:19 PM
Reply to: 2799514
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are possibly little experienced and narrow minded - have a look over the next hill. Might see something. |
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Msg ID:
2799616 |
Flying a twin with one engine at idle +0/-0
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Author:okay, so I'm both
11/23/2023 7:14:59 PM
Reply to: 2799612
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why don't you enlighten me. pretty simple question. |
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Msg ID:
2799701 |
Flying a twin with one engine at idle +0/-0
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Author:Nah
11/24/2023 10:36:18 PM
Reply to: 2799616
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Do ur own homework! |
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Msg ID:
2799716 |
Flying a twin with one engine at idle +0/-1
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Author:just as I thought
11/25/2023 7:56:33 AM
Reply to: 2799701
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you got nothin |
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Msg ID:
2799513 |
Flying a twin with one engine at idle +0/-0
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Author:Pilot
11/22/2023 7:13:08 PM
Reply to: 2799422
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Dumb question. Just stop and get fuel. |
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Msg ID:
2799535 |
Flying a twin with one engine at idle +0/-0
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Author:Sh 3 did it
11/23/2023 12:33:27 AM
Reply to: 2799422
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it was the first time a helicopter flew carrier to carrier non stop across the us. The did shut down one engine as soon as they could. There was some concern about full power on one input shaft. They did not run out of fuel. Look it up, it is a true story. |
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Msg ID:
2799544 |
Flying a twin with one engine at idle +0/-0
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Author:boy
11/23/2023 7:47:05 AM
Reply to: 2799535
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they sure flew that sea king around a lot on one engine lol |
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Msg ID:
2799702 |
Flying a twin with one engine at idle +0/-0
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Author:Assume
11/24/2023 10:40:37 PM
Reply to: 2799535
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full power means max continuous SE or did Sikorsky approve a one-off; not that they'd have to. SH3 not a fun autorotation machine. |
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