Hi Im wondering if pushback is made with the engines in the JS41. The pushback procedures section in the AOM its blank, and as Im new on this, I would like to ensure if its made with the engines or there are also other procedures in the real life. Thanks Asier

There's a video on youtube (I know, just the place all pilots should get their training from right?) of a J41 doing a pushback with the engines. RSR was saying that certain companies strictly prohibited that because if you stomp the brakes it will cause the aircraft to rotate on the main landing gear wheels onto the tail. Which I have nearly done in the sim myself trying to back out of a terminal on that tutorial flight. Just be sure to unchock the wheels, and get the props off the start locks. Then watch your EGT and RPM's while you do it. It does not take a lot of power to back the aircraft up even at high weights. I have not been able to locate official procedures because of it not being a recommended operating procedure (there is even a sticker on the control panel saying it is not allowed in the PMDG J41). A little improvising goes a long way though.

There's a video on youtube (I know, just the place all pilots should get their training from right?) of a J41 doing a pushback with the engines. RSR was saying that certain companies strictly prohibited that because if you stomp the brakes it will cause the aircraft to rotate on the main landing gear wheels onto the tail. Which I have nearly done in the sim myself trying to back out of a terminal on that tutorial flight. Just be sure to unchock the wheels, and get the props off the start locks. Then watch your EGT and RPM's while you do it. It does not take a lot of power to back the aircraft up even at high weights. I have not been able to locate official procedures because of it not being a recommended operating procedure (there is even a sticker on the control panel saying it is not allowed in the PMDG J41). A little improvising goes a long way though.

Are we talking push back here or Powerback?Some airfields banned Powerbacks due to the risk to personnel on the ground, let alone what the actual airlines companies procedure was on if they allowed the aircraft to powerback, although some airfields allowed it on certain stands. Pushback however is a different matter, its interesting that it says in the sticker pushback with engines is not allowed, when its standard practice at my local international airport! All JS41's pushback after starting both engines on stand!RegardsJames

Ok thank you very much for your repliesAsier

Hello,

 

I had to bring this old thread back to the top. I have haven't figured out the "correct" way to do a pushback with JS41. Here's what I do:

 

1) Connect ground power

2) Do all the preparations, set up FMS and execute all the checklist up to engine start

3) I turn the batteries on, and disconnect the GPU

4) Then I request pushback

5) When pushback has completed, I turn the engines on

 

Now here's my problem. When I disconnect the GPU, my FMS forgets everything: route, altitudes and so on.

 

Is this the way it should go or am I doing something wrong. I also tried a powerback but have only managed to get the engines glowing hot but no movement

 

Thanks for the help!

not shure about the JS41, but the ATR72-500 has a lock on of the right engine. So you can do every thing needed using the GPU, startup engine #2, lock the prop and thus still providing electrical power, get a push when #2 is started and propbrake is on. After push apply parkingbrake and start #1. Taxiing to the RWY on 1 engine [#1] alone is possible and done in reality. When ready to go release #2 put every thing in order to be able to take off [release prop lock and gustlock, set takeoff power, flaps etc] and- there you go.Thought the JS had a simular function on 1 or both engines.

I think you are absolutely correct when it comes to real world operations. There's a small a problem when it comes to the FSX version.

 

If I request a pushback with an engine running (with chocks, GPU, ... removed) what happens is that FSX registers this as a crash with a ground vehicle and my flight ends there

 

If I request a pushback with an engine running (with chocks, GPU, ... removed) what happens is that FSX registers this as a crash with a ground vehicle and my flight ends there

 

Turn off crash detection, first thing everyone should do due to silly things like this ruining flights.

The hard stands for these planes almost always allowed for arriving and departing in the same direction to avoid pushbacks. Even today, you can look at places like KDEN or KATL with turboprop service and see the ramp areas where these guys park. No jetways, just walk out to the plane, kick the tires and taxi away.

not shure about the JS41, but the ATR72-500 has a lock on of the right engine...Thought the JS had a simular function on 1 or both engines.

 

The J41 cannot have a prop brake as the TPE331 engines are geared (i.e. the props are directly connected to the engine). The PW127 on the ATR is a free power turbine type, which allows the engine to run whilst the prop is braked.

 

Starting the J41 with ground power connected is simple though; start engine 1, turn eng 1 generator on, disconnect and remove GPU, then start engine 2.

 

Now here's my problem. When I disconnect the GPU, my FMS forgets everything: route, altitudes and so on

Follow my above technique for a GPU start and there is no power interruption to the FMS, so you won't lose data. If you are doing a battery only start you should start the engines almost as soon as the batteries are selected on, get the generators running, then do all the avionic/electrical items.

The J41 cannot have a prop brake as the TPE331 engines are geared (i.e. the props are directly connected to the engine). The PW127 on the ATR is a free power turbine type, which allows the engine to run whilst the prop is braked.

 

Starting the J41 with ground power connected is simple though; start engine 1, turn eng 1 generator on, disconnect and remove GPU, then start engine 2.

Yes electrical power is where it all comes down to. I'm supprised the 'kite' doesn't have an APU though. The dash Q8 has one, and the ATR -like I said- has the abbility to have one engine runing without the prop turning.

 

Quotes:

"If I request a pushback with an engine running (with chocks, GPU, ... removed) what happens is that FSX registers this as a crash with a ground vehicle and my flight ends there

 

Turn off crash detection, first thing everyone should do due to silly things like this ruining flights."

 

reply:

So there must also be a fault in the aeroplane's design. it should not crash having a pushback.

 

I dislike the idea of turning crashdetect off and set every thing to: "easy". As I fly on a server with some guys i know, I can see some of them make "skippy-landings" which they think are normal but would make you crash with crash-detect on. I don't want to kid myself pretending everything is fine while doing things you can't do. :blink:

 

Are you shure it is the pushbacktruck that's causing the crash? [shft p ] At LEBL I got crashes due to airportvehicles in which I got pushedback into :(

Take a look here:

http://forum.avsim.net/topic/396372-battery-start-push-start/#entry2565768