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757 Captain >> 757 version 1.x-2.x (FS9 ONLY) >> Auto-throttle: engines revving up and down https://www.captainsim.org/forum/csf.pl?num=1255529094 Message started by kerke on Oct 14^th, 2009 at 2:04pm

Title: Auto-throttle: engines revving up and down
Post by kerke on Oct 14^th, 2009 at 2:04pm

First time poster and new CS757 Pro Pack v2.2 on FS9/XP Pro owner. I love this plane but I have a couple of questions/issues:

1) Something I've noticed, specially on approach, when flying leveled at about 210KIAS with auto-throttle ON: the engines revving up and down -- engines constantly spool up and down. Is that a bug?

2) My speed bugs don't show on the panel speed indicator instrument.

Thank you in advance,

Kerke

Title: Re: Auto-throttle: engines revving up and down
Post by kerke on Oct 20^th, 2009 at 12:42pm

Does anybody know?

Does anybody care?

:o

Title: Re: Auto-throttle: engines revving up and down
Post by Raven on Oct 21^st, 2009 at 4:01am

Hi Kerke. Speed bugs don't show in VC in 2D everything's OK. As for engines this may happen if you fly in real weather and the wind is unstable and changes direction, though I never use autothrottle below 10000.

Title: Re: Auto-throttle: engines revving up and down
Post by kerke on Apr 21^st, 2010 at 6:28pm

Raven wrote on Oct 21^st, 2009 at 4:01am:

As for engines this may happen if you fly in real weather and the wind is unstable and changes direction, though I never use autothrottle below 10000.

It is not the wind. I experienced this autothrottle speed hunting issue even on a no-wind flight. The autothrottle speed hunting behaviour happens, for instance, on leveled flight during autopilot heading turns. For example, I am flying with autothrottle ON and VNAV or ALT HLD, leveled at cruise altitute (i.e. FL370, FL240, 12000, etc.) heading 360 on HDG SEL... change the heading selection to, say, heading 260 and right-click the HDG SEL knob to begin the A/P heading turn from 360 to 260... See what happens? Not only does this aircraft engines start to rev up and down to try and maintain the autothrottle speed, it also becomes somewhat unstable trying to climb and descend to maintain the A/P altitude during the turn. None of my other payware aircraft do that.

Title: Re: Auto-throttle: engines revving up and down
Post by Joeflyer on Jun 4^th, 2010 at 7:51pm

This may be a stab in the dark, but do you have a registered version of FSUIPC? Maybe the aircraft is getting intermittent spikes via the flight controller you use. Just a thought....

Title: Re: Auto-throttle: engines revving up and down
Post by kerke on Jun 30^th, 2010 at 8:57pm

Joeflyer wrote on Jun 4^th, 2010 at 7:51pm:

This may be a stab in the dark, but do you have a registered version of FSUIPC? Maybe the aircraft is getting intermittent spikes via the flight controller you use. Just a thought....

Yes I do have a registered FSUIPC. It's not intermittent spikes, it only happens with the CS757, not with the other payware aircraft.