Not enough TO power ATR72-600

[Jeff D 13]

disregard this post

 

 

 

Edited September 8 by Jeff D

[Jeff D 13]

here's what happens. Takeoff weight at 21864

[Adamski_NZ 867]

Could you give details of your Simbrief plan + time of day and OAT?

Are you setting the WEIGHT section in the MCDU? Are your toe brakes properly calibrated? Maybe they're slightly on.

[Jeff D 13]

6 minutes ago, Adamski_NZ said:

Could you give details of your Simbrief plan + time of day and OAT?

Are you setting the WEIGHT section in the MCDU? Are your toe brakes properly calibrated? Maybe they're slightly on.

Yes, I set weights in the MCDU. Time of day is mid afternoon, temp 36deg C. Not sure about brake calibration. Is that something you have to do? Never heard of that

[Adamski_NZ 867]

2 hours ago, Jeff D said:

Yes, I set weights in the MCDU. Time of day is mid afternoon, temp 36deg C. Not sure about brake calibration. Is that something you have to do? Never heard of that

Simbrief plan details please!! We really need to see how much fuel/baggage you're taking off with.

As to the toe brakes - just check the see if they're as they should be in the MSFS Axis screens.

EDIT: I just set up a flight plan KAXH-KATL at 3pm and 36deg C. I got T/O trim calculated at 1.4UP. Weather clear 2kts wind ... and had no problems.

You're not taking off downwind are you ??? 

Edited September 8 by Adamski_NZ

[Jeff D 13]

On 9/7/2023 at 10:32 PM, Adamski_NZ said:

Simbrief plan details please!! We really need to see how much fuel/baggage you're taking off with.

As to the toe brakes - just check the see if they're as they should be in the MSFS Axis screens.

EDIT: I just set up a flight plan KAXH-KATL at 3pm and 36deg C. I got T/O trim calculated at 1.4UP. Weather clear 2kts wind ... and had no problems.

You're not taking off downwind are you ??? 

Not taking off downwind. I'll check the brakes in msfs. Here's my typical 2 hour Simbrief flight plan :https://photos.app.goo.gl/vDyWBAad4nJeFL8S7

 

[Adamski_NZ 867]

1 hour ago, Jeff D said:

Not taking off downwind. I'll check the brakes in msfs. Here's my typical 2 hour Simbrief flight plan :https://photos.app.goo.gl/vDyWBAad4nJeFL8S7

Great - I'll give it a go! Do you know you can share Simbrief plans? Not sure where - but next time you edit a flight, have a dig around the GUI - it's there somewhere!

[Matt Webb 147]

Confirm trim is adjusted before takeoff?

[Jeff D 13]

11 hours ago, Matt Webb said:

Confirm trim is adjusted before takeoff?

Yes. Trim is adjusted after pressing "confirm takeoff data" There's a pink arrow that is adjusted into position

[peloto 189]

This is true, I remember many months ago real pilots of the ATR arguing about this, hope it is solved in the near future.

And as a passenger of them many times, I can confirm it clearly.

Edited September 9 by peloto

[Adamski_NZ 867]

I think I see your problem: your ALT airport (KAUS) is too far away - and loading the required fuel (with 68 PX) makes you over MTOW.

Try Waco (KCNW) or reduce the PAX.

Here's my Simbrief plan: https://tinyurl.com/Simbrief-planL-KAXH-KDAL

It gives me a trim of 1.8UP ... which made my ATR take off like a rocket - about 2/3 of the way down the runway!

I think I'm out of ideas now!

 

Edited September 10 by Adamski_NZ

[Jeff D 13]

1 hour ago, Adamski_NZ said:

I think I see your problem: your ALT airport (KAUS) is too far away - and loading the required fuel (with 68 PX) makes you over MTOW.

Try Waco (KCNW) or reduce the PAX.

Here's my Simbrief plan: https://tinyurl.com/Simbrief-planL-KAXH-KDAL

It gives me a trim of 1.8UP ... which made my ATR take off like a rocket - about 2/3 of the way down the runway!

I think I'm out of ideas now!

 

OK. I see you have the variant HH726. I've been using the other 2 microsoft variants. I need to hunt down that variant and get into my simbrief airframes. I try that one. Thanks for all your help.

[Adamski_NZ 867]

Try this one:

https://dispatch.simbrief.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--

Or this one:

https://dispatch.simbrief.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

Click on `Save Airframe` so then it will be added to your airframes list on Simbrief.

Edited September 10 by Adamski_NZ

[Jeff D 13]

Ok. Got the profile into simbrief. The profile loaded 68 passengers, so I edited the flight plan and cut the passengers in half, which of course reduced the takeoff weight. Takeoff was exactly as you stated. It lifted off the runway actually by itself well within the runway length. I did have to trim a little nose down just after takeoff. Thank you so much for your help.

14 hours ago, Adamski_NZ said:

Try this one:

 

[-Belga- 139]

2 hours ago, Jeff D said:

cut the passengers in half

I hope the passengers didn't mind to be cut in half... <scnr>