May be quite a noob question but what are the friction claps or levers for? I do not manage to get a use for them. Thanks for your comments.
In the real world they keep the control(s) where you set them.
In MSFS they’re just for grins. 
Edit: although… in this model, given how things shake, you might need them!
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There are known issues with state saving. Just cycle all levers and controls to off and then back to on. Try and remember to shut everything down when you log out to avoid the issue.
And if he wasn’t complaining?
Does anybody know how to set the correct mixture in this plane? I haven’t found an EGT gauge like in the modern aircraft so I’ve mostly been guessing so far.
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A bit off topic, but I’m noticing a pattern here:
Every aircraft that creates a folder inside “packages” folder happens to be ace in my book and among my favorites, whether it’s 3rd party or mods of default. What gives lol?
My problem, my left and right cylinder temperature can’t reach 200-350, most of the time it’s 100, or even lower, I tried turning on the carburetor Heat (the top of the rod) and closing the Oil Shutters (the bottom of the rod), still can’t improve Cylinder temperature, doing this, will only get the carburetor temp above 100F, and the oil temp to between 60-80.
After lowering the carburetor Heat after takeoff, the carburetor temperature will drop to within 100F. Above 3000FT, the oil temperature began to decrease, the oil pressure began to increase, and my oil pressure exceeded 120. I also can’t get low oil pressure after I turn off the Oil Shutters.
Help me, how should I do it correctly?
I’ve encountered short-term freezes, and I don’t know why. Has anyone else encountered this phenomenon?
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Okay, if the indicator is indeed showing Fahrenheit, then what I suspect is that the 165°F (73°C) for the maximum oil temperature is just mistakenly using 73°F in some place at the calculations, hence the drop in oil pressure to almost 0 and subsequent engine damage if you get into the regime above 73° indicated. Trying to test this out, I had no drops and no engine out/ fire when keeping the oil at around 70° indicated, which would only be around 21°C.
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I may have a blind spot going on here, but where can I see carb temperature? I have scanned the manual for this and still don’t see it…
To monitor the temperature of your engines, sensors are mounted on the number 1 and number 4
cylinders of each engine. These thermocouples are connected to the engine temperature gauge,
located on the left side of the main instrument panel (see Figure 11-2). The selector next to the
gauge is used to cycle through the different temperature probes. The settings are wired as follows,
from left to right:
1 – left engine cylinder 1 head temperature
4 – left engine cylinder 4 head temperature
C – left engine carburetor intake air temperature
0 – not connected / off
0 – not connected / off
0 – not connected / off
C – right engine carburetor intake air temperature
4 – right engine cylinder 4 head temperature
1 – right engine cylinder 1 head temperature
The normal operating temperature is between 200
and 350 degrees Fahrenheit, however temperatures of up to 450 F are permitted during take-off and
in emergency situations.
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Any news from the devs on the issues reported here already?
Regarding the Oil Temperature gauge.
Is it possible that either:
- What @orthi said is happening… (the sim treats 73 degrees oil temp as 173 degrees)
OR
- That the Oil Temp gauge is displaying degrees C instead of degrees F?
It appears that oil temps above 80 on the gauge (which should be OK) seem to cause a steady decline in oil pressure followed by engine failure, multiple times.
However, Oil Temps of 60-70 seem to maintain normal oil pressure. I haven’t had any engine failures in this condition so far.
If the Oil Temp gauge was mistakenly displaying degrees Celsius instead of Fahrenheit… would it explain these failures / lack of failures?
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I’m also wondering if this is true with cylinder temps… mine is always around 100F, a bit low I think. Whereas 100C would mean 212F, a bit more reasonable…
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Any chance we will see this plane on OrbX?
Why do you need it on OrbX, just buy it direct? The developer is offering a great price.
First flight - after stalling both engines after runup ( how embarassing ) got it in the air easily & buzzing around my local area as I usualy do. Start procedure is pretty interesting, not really a problem as I’ve dealt with similar things in other aircraft. Only two quibbles atm
- Internal sounds are distorted to the point of being painful. I get what you were going for, but this actually hurts with headphones on, just muting the engines some should be enough.
- I’d take some higher resolution external textures. They’re nicely detailed & nicely done, just a bit blurry.
What a great aircraft! and what a fantastic price too! very much appreciated.
Good afternoon everyone!
First of: I am absolutely blown away by the way our 247D was received by the community. The amount of good wishes, congratulations and praise is overwhelming. I can’t thank you enough for it and I know that the rest of the team feel the same too.
I know that it might seem as if I went radio-silent. While I did have to do some catch-up on my sleep in the last few days, I still read everything that’s being posted here with great interest and I make notes of potential issues and things we could improve upon.
I also want to let you know that I am hopelessly behind my support-tickets, so if you sent me an email over the past few days, be aware that I am getting to it eventually, it’s just that the volume of emails is… a excessive… so it might take some time. Please be patient!
I want to address a couple of issues and try to outline where we are with the add-on.
1. Checklists
I hear you! I’ll be working on some interactive checklists, meanwhile Eric also got started on a PDF version of it. It’s kind of anachronistic, since checklists weren’t “invented” by the 1930s, but I understand how useful they are in this case.
2. Sound issues
We’ll keep working on the sound and a lot of issues that you fine people pointed out are already on our list to fix. Before an update is ready, I’d highly recommend to disable the “headphone simulation” in the audio settings, since it still seems to be causing some issues. And yes, the missing audio for the right flywheel is a bummer…
3. State saving-issues
I’m investigating what’s causing the issues with the state saving. It seems that in some cases the initialization code, which synchronizes the lever position with the internal simvar states, doesn’t always execute correctly. While this issue is unsolved, I’d recommend to wiggle engine distribution dial, the tank distribution dial and the mag switches before flight, to make sure they are set to the right value internally.
4. Starter issues with controllers like Honeycomb
I would highly recommend you create a controller configuration for the Boeing, which doesn’t use any starter-events! It seems that some of you can’t start the engines, because the engine-start events are not called properly and at least sometimes it can be traced down to the controller assignment used.
I’ll try to get to the bottom of this in the next update. The big issue is that I need to catch the right events from firing - and there’s a LOT of events related to starting engines.
5. Documentation
For the update, I will also spend some more time explaining engine management and the damage model.
6. Ts and Ps
This is a big one…
As you know, we’re using our own physics models to calculate temperatures and pressures - among other things. I saw that some of you already dug into the config file and found the extensive parameters for the oil circulation, which should give you an idea of the complexity of the system.
I am confident that the physics behind those calculations is spot on. However, with so many parameters to tune, there got to be problems with it too. It’s the old garbage in-garbage-out issue. Your calculations are only as good as the parameters you feed them with. I do believe that the oil temperatures are currently off the mark. The value displayed on the gauge is in fact Fahrenheit, but as some of you pointed out, the temperature range doesn’t seem to be right. The good news is, that this is merely a matter of scale. From a simulation point of view it makes no difference if the operating range lies between 80 and 110F, or 100 to 150F - it’s just a matter of tuning the parameters to fit the expectations.
A completely different matter is the cylinder head temperature and this is a tough one!
Some of you reported that the cylinder head temperature never seems to go above 100F during cruise, which is a problem that needs to be addressed. The question is, whether or not this is a problem with the simulation, or it is a problem with engine management - I’m quite divided on this myself.
In the real world, things don’t always go as planned and physics can be unpredictable at times. If you see your engine temperatures falling, you’d troubleshoot the problem (leaner mixture, more rpm, more manifold pressure, close oil shutters), however, if nothing helps, you’d come down to land and try to figure out what went wrong.
Obviously the second part - figuring out what went wrong - is quite difficult in the sim and I admit that we didn’t provide you with a lot of tools to trouble shoot.
But there’s also another part to this: sometimes it is simply not possible to operate your aircraft in the current conditions, because it’s not built for it.
It seems that those who experience a low cylinder head temperature with all its consequences, fly relatively fast through relatively cold air. In a way you’re super-chilling the engines doing so. Since the 247D doesn’t have cowl flaps to regulate the engine temperatures, there’s really not much that can be done at this point. The remedy could be: try finding some warmer air, run your engines faster, maybe try flying slower (drop your gear for a while?) or ultimately, land and wait for better conditions.
At the same time, I understand that the parameters for chilling the engine could be way off in our simulation - but the tweaking of such a parameter is not easy. If I decrease the “chill” effect of the wind, you might also have some real trouble keeping your engines cool during climb.
Long story short: I will keep working on those parameters and try to find a better balance between cooling the cylinders and heating them up. However, I would also like to ask you to keep an open mind with the level of simulation. We implemented real-world-physics (oppose to the usual look-up tables), and because of this, you will find yourself situations that can’t be explained easily.
Final thoughts
Once again, I want to thank you all for all the support and love you keep throwing at us. It is a very humbling experience.
We will keep working on this airplane and work through the issues you pointed out and I hope that, with your help, we can make her better and better.
Lastly, please be patient with us! I’m doing my best working through the support tickets, mails and messages, but the day only has 24h.
Much love!
Otmar and team
Wing42
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Oh, I forgot to mention:
She’s coming to the MSFS marketplace! Probably sooner than you think! 
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That’s good news.
Waiting for updates.
In addition, I look forward to having a co pilot who can help me fly the plane. Sometimes balancing makes me feel difficult.
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