Interesting video, have a look.http://www.youtube.com/watch?v=6CK8VnK3YCACurt

After watching this a couple times, I decided to try an in-flight start. I couldn't get it to start, not from a feathered or unfeathered state. Is there an in-flight start procedure someone would like to share?Curt Branch

What do you have the START MASTER switch set to? It should be set to AIR for an air start... From the manual, electrical power is supplied to the applicable unfeathering pump...Sounds like something I wouldn't mind trying out as well... I wonder if that is simulated here...Andrew

Well, just took her up for a spin over Tamworth...Shut down the RH engine first... let it cool... then tried an air start...First attempt didn't relight... so after a new cooling phase, I tried again. This time, setting the right CL to taxi position, selector switch set to air start, prior to hitting the start switch, I unfeathered the right prop manually, and the engine lit off after about 10 seconds or so...It may not be the exact correct procedure possibly because of the way the feather system is designed to work under FSX perhaps? (PMDG: sorry, I am only guessing here, not making any criticisms, quite the opposite...). As far as I understand the air start procedure, the air start energizes the unfeather pump prior to starting the engine, and I could see the blades refeathering after my first aborted start.But the air start DOES work, I got both engines to air start... as I said, I used the unfeather switch just prior to hitting the start button, and that worked...I would be interested to hear if anyone else has tried it. Also I would be really interested in hearing from anyone who can tell me that what I am doing is a load of nonsense and what the correct procedure should be, if I am doing something wrong or am making an error in procedure somewhere...Cheers... loving the JS41 more and more the more time I spend with it.AndrewEDIT: Just tried it again, and the unfeather pump on the central console must be operated before relight can occur...

The video shows a restart from a feathered state, at least it appears that way. The PMDG model requires an unfeathered prop to start, but even having the switch set to air doesn't ignite for me. It's not that big a deal, but I like to emulate things I see in aviation videos. Curt

True... I am guessing a work around because of the internals of FSX... If you manually unfeather the prop just prior to pushing the start button, it does light off... rpm rises faster, and around 55-60% rpm the torque indicator rises, EGT remains stable below limits... once the engine is up and running, the CL can be pushed to FLIGHT and the power lever can be advanced...You're right, the prop is feathered at the start in the video. I believe the mechanics is that the air start selector switch allows the unfeather to energize during initial rotation, thus reducing the drag of the prop while starting.Air restarts are possible, you just need one extra step that is not required real world...Andrew

Real world case also requires that the prop NOT be feathered for starts. I've got a lot of twin engine time, and several in-air shutdowns but the only time I have ever restarted an engine in the air was during a check ride. I can't think of any other reason you would shut down a good engine.

Hi Dan,thanks for adding to this.The video is a check ride I believe...I just read the AOM on this: 8.6.1 PropellersB.2 UnfeatherAn electrically operated unfeather pump is supplied for each propeller. This allows the propeller blades to be moved from the feathered position to a blade pitch angle where a propeller-windmilling air start can be done.That is our answer...But the video demonstrates the start from a feathered prop... Certainly no big deal, and it is nice to see that it generally works... though there is no other reason as you say, Dan, to shut down a perfectly good working engine in flight other than for check ride purposes...Andrew

In the J41, you do not need to manually unfeather the prop prior to attempting a start. With the START Master switch in AIR, the unfeathering pump is automatically operated to begin unfeathering the prop, and the torque load assembly (a subcomponent of the NTS system) sets the torque ring to achieve and maintain a blade angle that allows sufficient windmilling and prop torque load to allow for an airstart.I made many IFSD/restarts during beta testing, and as best as I can recall, everything worked exactly the way it was supposed to. I'll see if I can check it out this evening.

OK, so how to perform the IFSD/restart?I have the CL in feather shutdown, the latch button needs to be released to get it to TAXI position. Does the prop come out of feather?A step by step would be nice here...Andrew

Andrew,I'm not absolutely sure whether the CONDITION lever should be in TAXI or FLIGHT, but I suspect it will need to be in FLIGHT. Moving the CONDITION lever out of FEATHER will have no effect on the blade angle, and the prop will remain feathered.Regardless, moving the CONDITION lever out of FEATHER does mechanically open the Manual Fuel SOV, and enables the HP/LP fuel valves and the HP hydraulic valves to reconfigure to their commanded (switched) positions. Once that is done, you'll find that the start should progress normally with the START MASTER knob in AIR and the START button is pressed.I'll try to make some time to run through it in the sim this evening to confirm that it works this way on the PMDG bird.

Can one of you guys make a checlist like approach for restarting in the air, I am a bit confused on how to do this, it would be so nice for training flight in the JS, thanks.

Well, I just checked it, and I couldn't get it to restart at all, regardless of procedure. That's not the behavior I recall from the beta test.I don't have any more time to troubleshoot it right now, but I'll give it another shot a bit later to see if I can figure out whats going on.

Cheers... thanks for the update and thanks for taking the time to look at it Nick.That was also my conclusion from 90 minutes of testing last night...I could only get the air start to be successful with operating the manual unfeather underneath the power levers...I understand it from the manuals that the switch in air start should guarantee the unfeathering of the blades on spin up during the preliminary engine start phase, as the posted video displays.Thanks againAndrew

Just a bump to see if you have had any time to look at this again, Nick...Andrew