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Wednesday evening session discussion thread.

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Re: Wednesday evening session discussion thread.

Postby MariuszXC » Thu Oct 14, 2021 8:59 pm

benih wrote in Thu Oct 14, 2021 7:55 am:Maybe i find time to redo the route on my own.

Highly (pun intended) recommended :)
However, I was able to spend the offline-evening finishing the spark plugs fouling simulation..

Eh, yes, always the dilemma, work or fly?
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Re: Wednesday evening session discussion thread.

Postby TheEagle » Thu Oct 14, 2021 9:47 pm

MariuszXC wrote in Thu Oct 14, 2021 8:41 pm:What bothers me is that throughout the event I was flying an amphiboius version oc C172p, but on your screenshot floats are missing. Also my registration sign is not present.. It would point to some model properties being not transmitted correctly, but that is puzzling with a production-level plane model... Any idea, what may be going on?

Hm, I observed that you always appear as c172p-common in the pilot list, whereas all other Cessna's are simply c172p's.
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Re: Wednesday evening session discussion thread.

Postby benih » Thu Oct 14, 2021 10:29 pm

Marius, that is the low quality mp model showing due to lod settings.
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Re: Wednesday evening session discussion thread.

Postby benih » Fri Oct 15, 2021 3:00 pm

One info about the C182 briefing we did a while ago.
Marius (i think it was him) asked me if you can exceed engine limits. In the simulator, of course you can.
However: I now found some real aviation forum posts[1] that mandate to reduce power as soon as practical. And that is not obvious from the checklist, but its basicly the question about when to go from the "takeoff"-phase to the "enroute climb" phase.
They said that one should reduce power as soon as all obstacles are cleared.

A reduction to 25MP manifold got me to about 15Gph fuel flow when leaned to max power and kept the CHT hot but not exceeding the red line anymore - i think this depends alot on the current weather and weight of the plane.

That said, one thing may(!) be that the CHT heats a little too fast. I still have no real data to adjust this better. Btw, what does a cylinder head weight (currently its fixed at 4Kg per head, but that was arbitarily choosen. Probably too low, the entire engine weights 400lbs/136Kg!)?
EDIT: found a source listing it at 21.75LBS (~9.8KG). I tested that and it looks sensible: https://github.com/HHS81/c182s/issues/444; climbing at max power to pattern altitude is no more a problem.

____________
[1] Searched with search terms "c182s takeoff power reduce"
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Re: Wednesday evening session discussion thread.

Postby MariuszXC » Fri Oct 15, 2021 8:58 pm

TheEagle wrote in Thu Oct 14, 2021 9:47 pm:Hm, I observed that you always appear as c172p-common in the pilot list, whereas all other Cessna's are simply c172p's.


Yes, I noticed that too. I think it is something left over from when I was trying out the newest git version of C172p. But I deleted those files a long time ago and reinstalled the DATA component (using download_and_compile script) and am on stock version. Yet in multiplayer my C172p is advertised as c172p-common. No idea why is that and what is stuck / needs reset to default.

benih wrote in Thu Oct 14, 2021 10:29 pm:Marius, that is the low quality mp model showing due to lod settings.


OK, I get that, but even then, shouldn't floats be drawn? (I am OK with low quality ;) )
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Re: Wednesday evening session discussion thread.

Postby benih » Fri Oct 15, 2021 10:13 pm

No: The basic low-poly model is just the AI model you may find on some airports as scenery objects.
It's just a very basic placeholder to conserve FPS.
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Re: Wednesday evening session discussion thread.

Postby Volador » Mon Oct 18, 2021 12:47 pm

I've taken Niels's advice and ordered a basic Saitek throttle quadrant... (42UKP new, not bad) I'm not sure I'll have it before Wednesday though. I've heard their yokes are not that great but I do know that if the potentiometers give up I can always adapt it with my bargain bag of hall effect transistors and some magnets :D
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Re: Wednesday evening session discussion thread.

Postby Ysop » Mon Oct 18, 2021 5:20 pm

Great. welcome in the club! Looking forward to hear your experiences with it.
There are rumors, that the red lever is going to be increasingly important...(Hint:spark plug fouling)

On mine one lever is not producing clean signals any more after years of usage. Apparently it just needs a good internal cleanup. I'll start that, when other channels deteriorate.
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Re: Wednesday evening session discussion thread.

Postby TheEagle » Mon Oct 18, 2021 5:24 pm

What is the red lever ? Mixture ? Whatever ha the mixture lever to do with the spark plug fouling ?
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Re: Wednesday evening session discussion thread.

Postby MariuszXC » Mon Oct 18, 2021 5:28 pm

There are (pricey) sprays for cleaning/lubricating potentiometers, but in a pinch a drop of clean silicone oil will work wonders. Also soldering a 100nF solid capacitor between the wiper leg and one of the other (usually the GND connected one) legs tends to help.

@TheEagle: did you miss this topic? viewtopic.php?f=34&t=39770
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Re: Wednesday evening session discussion thread.

Postby TheEagle » Mon Oct 18, 2021 5:41 pm

No I did not miss it - do you mean one has to lean the mixture when spark plug fouling occurs ?
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Re: Wednesday evening session discussion thread.

Postby benih » Mon Oct 18, 2021 5:56 pm

No - before it occurs.
In short: Cold combustion will foul your plugs, so you need to lean on ground to make the combustion hotter. And most probalbly (depending on the weather) you need to increase the idle RPM - in the C182s/t it's 1000-1200 RPM.

If you want to try it out or learn more, grab the PR's GIT code (branch Issue-439_SparkPlugFouling) and run trough the 10 minute insim tutorial. I added all known (to me) information there :) and you can see what harm fouled plugs do, and also how to avoid and remedy.
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Re: Wednesday evening session discussion thread.

Postby Ysop » Mon Oct 18, 2021 8:29 pm

MariuszXC wrote in Mon Oct 18, 2021 5:28 pm:There are (pricey) sprays for cleaning/lubricating potentiometers, but in a pinch a drop of clean silicone oil will work wonders. Also soldering a 100nF solid capacitor between the wiper leg and one of the other (usually the GND connected one) legs tends to help.


Excellent, thanks! Looks like no.1 and no.3 need some care.
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Re: Wednesday evening session discussion thread.

Postby benih » Tue Oct 19, 2021 10:45 pm

I really need to make the C182s floats capable: https://sky4buy.com/1998-Cessna-182S-Am ... d=noscript
(also nice interiour pics there)


Edit: Will try to come with the Caravan then.
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Re: Wednesday evening session discussion thread.

Postby TheEagle » Tue Oct 19, 2021 10:56 pm

Caravan is a good idea - I tried the route, and once I still almost crashed (flew 200 ft over a mountain pass). DHC6 is not strong enough I'm afraid.
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