ATR Engine Power Decreases when selecting CLB

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Are you using Developer Mode or made changes in it?

No.

Have you disabled/removed all your mods and addons?

No.

Brief description of the issue:

Switching from TO to CLB mode in the Power Manager panel resulted in extremely slow climb. Engines sound like they’re decreasing in power. This results in climb rates of 400-600 fpm with throttles in NOTCH, book climb rate is about 1400 fpm. I have to use MCT to get any sort of good climb rate.

Provide Screenshot(s)/video(s) of the issue encountered:

Detailed steps to reproduce the issue encountered:

I just change from TO to CLB.

PC specs and/or peripheral set up if relevant:

Build Version # when you first started experiencing this issue:


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Do you have the same issue if you follow the OP’s steps to reproduce it?

Provide extra information to complete the original description of the issue:

If relevant, provide additional screenshots/video:

Looks like the power levers are in the ramp/wall rather than the notch. With PL in the notch and PWR MGT set in CLB, you should have 82%NP and around 90% torque (Decreasing with alt).

The notch is the two white marks on the PLs, as per green arrow.

For reference the PLs stay in the notch pretty much from takeoff to descent when they may come out to slow down.

The ramp is used for go-around and the wall is your last resort in windshear etc.

They weren’t in Notch in that screenshot. But I’ve done more than one flight since I took it, using Notch, and have the same result. Glacial climb rates.

Do you have the same issue if you follow the OP’s steps to reproduce it?

Yes

Provide extra information to complete the original description of the issue:

Aircraft may be underperforming per available performance documentation. Particularly the -72

If relevant, provide additional screenshots/video:

Here’s another screenshot with the right power settings. Climb rate is way under book rate of about 1300 fpm.

Even this sadly is bugged. Should be 82% NP and 90 odd torque. It’s unfortunately the way it’s been coded

What was your gross weight. Here in the tropics and gross weight above 20tonnes climbing out of 10000feet daytime the climb rate is about 600-1000fpm. In some cases pilots will opt to climb white bug +10knots for greater climb angle.

I’m flying the 42 for the first time right now and I have to say the performance is closer to what I expected.


In VNAV IAS the FMC bug it to 170 and for whatever reason the TQ and NP is lower too…

Do you have the same issue if you follow the OP’s steps to reproduce it?

Yes

Provide extra information to complete the original description of the issue:

Just flew the 72 and I’m having the same issue. I take off and as soon as I switch to CLB, the props sound decreases a lot. The climb rate was awful and at Cruise, I can’t go over 200 knots. Managed speed is set at 244.

If relevant, provide additional screenshots/video:

If your gross weight is above 18tonnes dont expect 1300fpm climb rate past 10000feet. 600-1000fpm is what you would get. Cruise IAS speed wont go past 210knots especially if your cruising above 14000feet and heavy loaded. If your ground speed is 250-280knots thats the correct speed you’re suppose to cruise at.

I’m having a lot of issues with this aircraft as well. I can’t seem to get the plane to go above 150 knots. When I select climb the power reduces, causing my plane to try to climb at too steep a rate which then stalls and the autopilot turns off, sending me into a spin. I even ran into an issue where all the dial stopped working and I couldn’t change elevation nav screens or do anything with the autopilot panel. The air craft even seems bogged down when I do the weights as just a pilot and co-pilot at 50%fule. It is odd.

You might want to check youtube on how to fly the aircraft properly. That should not be happening.

Been there done that. Have any useful information, or just the verbatim “get gud” bs? Thanks for nothing.

The ATR also when on climb out cannot use IAS mode effectively as it stops climbing and actually loses a few feet followed by don’t sink until it reaches 170 IAS forcing the use of vs mode. Pitch hold would be a more accurate method but that forces a 5 degree attitude i even if a different value is selected. The 72 certainly suffers from low torque UNLESS you are just taxiing, I did 30 kts in ground idle today. I constantly use reverse pitch to keep it managable as the brakes are really harsh. IRL i love the little plane that can, what we have is really odd.

I think as of now with v1.20 you would do better using hdg or lnav laterally and initially vs mode set at +1000fpm. This will allow smooth accel from takeoff thru 140 flaps up and to 170 ias where the plane can properly use ias mode for further climb.

I do not activate IAS until reaching 170/160 kts. Magnar’s latest takeoff tutorial on YouTube confirms this.

It has the same behaviour in vnav mode so in that case what is the ideal mode for the initial climb out?
Edit assuming an initial climb into IMC vnav gives the same result as IAS only with alt constrictions and will regardless of terrain level the plane upon autopilot engagement until reaching 170 which is surely wrong as vnav is the mode used or IAS

I just flew a Binter GCHI (which has trees by and in the runway threshold up to 100 ish feet btw stupid) to GCLP FL130 21.8 tonnes and got about 1200fpm until fl60 and about 800 to fl100 and 500 fpm above FL100 to FL130

Autopilot shouldn’t be engaged until you’re at 160/170 kts.

Edit: for what it’s worth I observe the same behavior as you in the sim. I eagerly set the plane up for climb at 200 ft agl and nose down trying to pick up the climb speed.

I’ve seen some inconsistency around the magenta speed bug moving to 160/170, but that may have been resolved.