Piston & Turbine Dukes

Here are the supplemental oxygen requirements from the FAA:

Sea Level to 12,500' - No oxygen required.
12,501' to 14,000' - Required by the required crew if over 30 minutes at this altitude.
14,001' to 15,000' - Required to be provided and used by the required flight crew.
15,001' to 25,000' - Must be provided for every occupant.

Since the Duke has a pressurized cabin, the oxygen system is only really designed for use in a pressurization emergency, or to supplement the cabin pressurization at very high altitudes, as you discovered. There are also different types of oxygen masks. Some are more sophisticated "diluter-demand" or "pressure-demand", which use less oxygen than the standard face mask or nose canula, which are "continuous flow" devices. In fact, continuous flow devices are limited to only 25,000ft by the FAA, so you should not rely on their use over that altitude, but they could still be useful in an emergency scenario.

In reality, many continuous flow systems have adjustable flow rates to prolong cruising times, while my system is just on or off. This is probably the biggest contributor to what you're seeing, since the body would not require the maximum flow rate to sustain a healthy blood oxygen concentration at only 12,000, once acclimated.

All this to say, you should be able to avoid all oxygen concerns by maintaining within the limits the FAA imposes. However, if your blood oxygen concentration begins to decline below 90% on the tablet, a period of supplemental oxygen use, followed by continued monitoring of your blood oxygen concentration should keep you in good health to fly without using all of the continuous flow oxygen in a few hours.

I hope that helps answer some of your questions! Let me know if you have any more.

Wow, great information! Unlike the KX-155's, I've never had a KR87 in my aircraft, so I'm not surprised these escaped me. To tell the truth, unlike my other avionics, I only implemented my own KR87 to get the correct 7-segment font, and did not go though the process of synthesizing the manual, like I've done for other avionics. That's the real reason for the oversight. I was just trying to duplicate the behavior of the unit in default aircraft, but I should have expected that would not be accurate. Thanks for letting me know!

With the checklist it would be helpfull to have the performance tables within the efb. Would make everything much eaiser in vr to set max range/endurance/continuous etc.

it is indeed

Same happens to me, I opened a topic: https://community.justflight.com/topic/6431/save-state-not-working

Works all flawlessly :)
While testing the gauge and making the bars blink if the values are over the limit of 450 °F for CHT and 1650 °F for EGT, I was not able to get the EGT to the Limit. Even while standing with full throttle and max rpm and leaning to peak with closed cowl flap. Is the Limit for EGT only theoretical?

I'll look more closely then, thanks for the replies. Having a great time with all the Dukes, glad I got the bundle.

will do! thanks

Will do. Thanks for confirming that this might be a case of a strange bug. I will keep an eye on it.

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And for those wanting to prevent this for now, this is the option! Didn't realize it was split into 3 categories, yay I can still eat !@#$ on a tree and be punished for it!

Thank you for that
Will have to ask over on spad if there is a way for me to use that

@mmcmah You extend the beta in the tablet. Why? Why not? :-)

I always say that since I paid for the simulator, the computer and the aircraft, I get to fly it anyway I want. Some like "realism," some don't care.

@Black-Square Through my digging I found this NASA paper on turbochargers and one of the engines referenced is the Lycoming TIO-540. I can’t say which variant, but perhaps it would have something useful.

https://ntrs.nasa.gov/api/citations/19840013811/downloads/19840013811.pdf

@Randolf That part, I'm not sure. Never worked on one or flew one in the real world.

In reality I could be completely wrong about all of this actually, I'm just going off basic knowledge - mainly expecting to hear either "Oh, oops! Thanks for pointing that out, will be fixed next patch" or "Actually it's supposed to be like that"

Wonderful! It's been bothering me all day thinking about this, since there was nothing I could do to quickly fix it for you on my end. Thank you for sharing.

Hi,

Thank you for your explanation!
After moving the throttles out of the beta range, the engines stated and shut down as expected.

I use the mouse scroll wheel to operate those 3-position switches and it works pretty fine. But you need a mouse with well-defined scroll wheel "hops", some mice tend to have misaligned scroll wheel positions with the output they send, like sometimes two, sometimes none, for each scroll wheel hop.