Feature Request: Realistic Mustang Start-up Dynamics - Page 4 - ED Forums
 


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Old 08-30-2017, 02:48 AM   #31
Magic Zach
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Quote:
Originally Posted by BuzzU View Post
We have no idea if the Mustangs were warmed up. Also, the air temp has a lot to do with how quick it smooths out. I know my buddies Mustang sputters and coughs when it stone cold.
I just ran a test in DCS 1.5.7. I took a Mustang, and used these air temperatures: 20C/68F, 35C/94F, and -40C/-40F. There was NO wind for any of these tests.
For ALL three of these temperatures, the coolant and carburetor reflected the same temperature as the air. The oil did as well, but the gauge hits its bottom at 0C, but we can assume the actual oil was also the same as the air temperature. If the air temp was 20C, so was the carb, coolant and oil gauge. We can dismiss the idea that the DCS: P-51D Mustang is warmed up when spawned in.

-40C took a bit of effort. The engine would slowly start to catch, instead of instantly catching. It took about 6 seconds for it to wind up to idle. I find it amusing, yet not surprising that I was contrailing at sea level. I wonder what taildragger pilots near my local airport think of winter, as we can hit those low temperatures.
20C was quick as a snap, just like any other time the DCS: Mustang is started.
35C felt no different than 20C.
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Old 08-30-2017, 10:23 PM   #32
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We cheat a little bit and stated it, as the Mustang was released: at low temperatures the oil is pre-diluted. You can try start the engine at very low temperature, warm it up, fly for 10-20 minutes at maximal power, land and then leave the plane with stopped engine for an hour...

And for the second time you can dilute the oil for the next start-up.
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Old 08-30-2017, 10:29 PM   #33
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Is there any chance that these start up effects and dynamics will be added to DCS in the future? I can only imagine that if it was then it would be after 2.5.
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Old 09-13-2017, 04:21 PM   #34
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We still alive here?
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Old 09-23-2017, 06:52 PM   #35
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Another one:
https://youtu.be/-yTHDQZL1dE

Skip to 2:35. Or watch the entire video because the Mustang is beautiful, after all. This was at a show, and it was a hot start, but either way...:
https://youtu.be/0ZYxHizFd4Q
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Old 12-16-2017, 12:45 AM   #36
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If the dynamics won't be changed, maybe the sounds can.
https://m.facebook.com/groups/177585...55300822962449
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Old 12-18-2017, 02:39 PM   #37
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The one thing that has always bugged me, is that while starting, the propeller turns way too fast before any cylinders are firing.

In all the videos I've seen, both old and new, the propeller doesn't go over about 60-80 RPM untill cylinders start to fire. Then speed picks up in accordance with the number of firing cylinders.

Try turning over the Merlin with the fuel pump off and the magnetos both off. The propeller runs away at about 200-300 RPM, maybe faster.

You are supposed to turn the propeller 3 blades minimum before ignition, so before either magneto is on. As far as I know, during the war, this was done by hand. In a modern video, I've never seen a P-51 have its propeller turned by hand. I'm guessing that all the starters are modern these days, and can take a lot more turning before burning out. Our manual says 20-30 seconds.

So my start-up procedure is:
Breaks: parking, on
Fuel cock: open
Battery: on
Generator: on
Prop-RPM: 3000
Throttle: 'cracked' 1"
Fuel pump: on
Magnetos: off for now
Starter: on (count blades 1-2-3: <== from here on, even before any
- - cylinders could fire, the propeller is way too fast

- - magnetos: both on
- - primer: on (count 1-2)
- - primer: off
- - - allow engine to turn until it fires up, or 20 seconds, but it almost
- - - always fires by the time I release the primer, with few exceptions

It's minor, but it kind of feels *blähhh*
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Old 12-18-2017, 02:48 PM   #38
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Quote:
Originally Posted by Captain Orso View Post
The one thing that has always bugged me, is that while starting, the propeller turns way too fast before any cylinders are firing.

In all the videos I've seen, both old and new, the propeller doesn't go over about 60-80 RPM untill cylinders start to fire. Then speed picks up in accordance with the number of firing cylinders.
Never noticed it before, but now that I think about it, it does seem to be something that's out of place.
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Old 05-18-2018, 04:56 AM   #39
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This is still something my fingers are crossed for. Would be beautiful to have these dynamics.
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Old 06-07-2018, 07:39 AM   #40
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https://www.youtube.com/watch?v=4z1Z-WEZZGM


https://www.youtube.com/watch?v=J1F_UJaaP1A


All said and done....The DCS Mustang is about as real as it gets folks. No other sim that I have ever flown is 95% accurate to the real thing.
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