Prosim wrong logic for engine failure acceleration

Driver170
Posts: 3652
Joined: 29 Feb 2016, 02:22
Location: Edinburgh

Re: Prosim wrong logic for engine failure acceleration

Post by Driver170 »

eiketre wrote: 14 Sep 2021, 20:11
Driver170 wrote: 14 Sep 2021, 20:08 [
Can someone please do an engine failure climb out at V2 and set ACCEL HT to 1000AGL and you will see the FD bars drop to command a near level flight to accelerate
Try set another EO ACCEL HT and test one with VNAV and one without. It should not be refrence only.
I don’t arm VNAV for takeoff though.

The EO ACCEL HT has no connection with the AFDS its just for pilot reference
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eiketre
Posts: 175
Joined: 31 Oct 2020, 12:36
Location: Norway

Re: Prosim wrong logic for engine failure acceleration

Post by eiketre »

Driver170 wrote: 14 Sep 2021, 20:21

The EO ACCEL HT has no connection with the AFDS its just for pilot reference
VNAV Takeoff -One Engine Out

During the all engine takeoff flight phase, VNAV will be enabled to automatically
adjust the target airspeed profile upon engine out detection.

If a single engine failure is detected while in the VNAV takeoff flight phase (for
all engines) and below the engine out takeoff acceleration height, the FMC will
calculate and issue a target speed equal to the greater of current airspeed or V2
limited to be less than or equal to V2 + 20 KCAS.
This speed will continue to be updated until an engine failure is detected, at which
point the target speed will be frozen at the present value.

VNAV will continue to generate this target speed until reaching the engine out
acceleration height or when VNAV guidance initiates a level-off prior to reaching
the engine out acceleration height, at which point the VNAV target speed will be
changed to VREF + 70 KCAS (flaps up maneuver speed) subject to the applicable
speed limits for the current airplane configuration.
--

But i am not sure if this is implemented in ProSim?
Driver170
Posts: 3652
Joined: 29 Feb 2016, 02:22
Location: Edinburgh

Re: Prosim wrong logic for engine failure acceleration

Post by Driver170 »

eiketre wrote: 14 Sep 2021, 20:25
Driver170 wrote: 14 Sep 2021, 20:21

The EO ACCEL HT has no connection with the AFDS its just for pilot reference
VNAV Takeoff -One Engine Out

During the all engine takeoff flight phase, VNAV will be enabled to automatically
adjust the target airspeed profile upon engine out detection.

If a single engine failure is detected while in the VNAV takeoff flight phase (for
all engines) and below the engine out takeoff acceleration height, the FMC will
calculate and issue a target speed equal to the greater of current airspeed or V2
limited to be less than or equal to V2 + 20 KCAS.
This speed will continue to be updated until an engine failure is detected, at which
point the target speed will be frozen at the present value.

VNAV will continue to generate this target speed until reaching the engine out
acceleration height or when VNAV guidance initiates a level-off prior to reaching
the engine out acceleration height, at which point the VNAV target speed will be
changed to VREF + 70 KCAS (flaps up maneuver speed) subject to the applicable
speed limits for the current airplane configuration.
--

But i am not sure if this is implemented in ProSim?
Ok got ya on this one. I wasn’t using VNAV for takeoff. So it seems prosim is using the EO ACCEL HT then regardless of VNAV which i think is still wrong as its not using VNAV
Win10Pro 20H2 x64;.NET 4.8; P3D 4.5.14.34698; Connection: SimConnect; FSUIPC 6.013; Prosim 3.06b4 VFM 1.55, Cpflight MCPPRO-EFIS-SIDE-MIP-PEDESTAL, 2xCDUPRO, FWD-OVHD AFT OVHD, CFY Gold+Motorized TQ; FBC cockpit structure, yoke, rudder & tiller

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