I can only reiterate what I said earlier:
There is absolutely no reason for a manufacturer to install a leaning lever if it is not supposed to be used in flight and its only function is to open the fuel valves. That can be done with a simple flick switch.
If an aircraft has a lever for mixture, then it is there to be used.
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For the sim sure do what you want but IRL not if the POH doesnât say so. Aircraft have lots of controls but they are all designed to be used in accordance with this document not just how you want.
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Well you donât have to believe me and you can lean it in the sim if you want to, it just is not realistic.
The mixture lever always stays in the forward (full rich) position during flight.
Sure, you could lean it IRL, but the risk to reward ratio is very much on the risky side.
Good pilots like to keep the risk down on whatever they do.
Thats why they say there are risky pilots and old pilots, but no pilots that are old and riskyâŠ
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I do believe you, I just donât understand why there is a lever in the first place if it is not to be used.
I get it now â that lever is just an emergency engine cut off. Itâs just a weird coincidence that the first flight I did in it, I randomly picked an airfield at 7600 ASL so encountered this problem straight away.
Itâs a shame you canât fly that high ârealisticallyâ (not that thatâs going to stop me). However, this aircraft is definitely great for city sightseeing and most cities are below that level so itâs all good.
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I get it now â that lever is just an emergency engine cut off.
It is not just an emergency engine cut off, it even is the only engine cut off that is used in normal operations.
Unlike a car the engine is not supposed to be shut off by turning off the ignition, you always want to shut it off by fuel starvation.
Itâs a shame you canât fly that high ârealisticallyâ (not that thatâs going to stop me). However, this aircraft is definitely great for city sightseeing and most cities are below that level so itâs all good.
Well you can fly that high, you just cannot take offâŠ
But still you donât usually fly above 10 000 ft for a prolonged time, as you would also need to carry supplemental oxygen, because the cabin is of course not pressurized.
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Just because a control to a function is provided, it does not mean it can be used at any time in any phase of operation. This is why pilot and type training is required to operate any aircraft. Aircraft technical manuals generally do not cover how to operate an aircraft although they may contain some specific warnings for peculiar aspects of the design.
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Well said. In our case, we rely on expert views since we do not go to flying schools.
Iâve learned a lot over the last few days about the G2 and piston helicopters. The full mixture thing came to me with a shock. It shows you learn new stuff every day.
Hopefully, when the MSFS helicopter lessons do come out next year, the virtual instructor at least mentions this full rich mixture requirement.
I wouldnât call all the usual V speeds and other limitations etc peculiar. The POH is so called because it tells a pilot how to operate the aircraft.
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Not at all, V speeds, limitations and performance data doesnât tell you how to fly they just inform the pilot of these important elements which are used in the decision making process of the flight. When I say peculiar to the design, Iâm referring to something specific to the design that is unusual. Thereâs lots of data useful to the pilot, thatâs why itâs published but it is not an instruction manual on how to use systems.
I think we kind of agree and I am not suggesting it replaces familiarity training or a type rating but I wouldnât be quite so dismissive of it. Itâs an official document that every aircraft has to have and be operated in accordance with. A personal user is unlikely to get training in the sim so in this environment itâs the next best reference.
Ha! Good one! 
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Not necessarily. Iâm not an expert but LOGICALLY, the fuel âswitchâ is ultimately a physical device, a mechanical actuator. To move an actuator with a flick of the switch would require an EXTRA layer of complexity (point of failure) - the wiring and the electricity. OR - you have a lever which physically moves the actuator via cable linkage.
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But it is used - to shut down the fuel flow.
So youâre not a real pilot, right?
Also, in many aircraft some controls are just there for the mechanics to check out certain things during maintenance and not to be used during flights.
No Iâm not.
But there are more than enough Aircraft out there who have a fuel valve and a mixture lever. The Guimbal only has a mixture lever and no valve. Thatâs confusing.
The fuel valve is a certification requirement that shuts off fuel at the firewall. Now I havenât looked at the fuel system layout in the Cabri but I did notice that there is a fuel selector on the rear bulkhead which may also be the firewall. A separate fuel shutoff at the firewall is therefore not required as it complies with this requiement already. Basically the fuel selector is doubling as the fuel shut-off because of where it is located. Most fixed wing aircraft canât achieve this because of the fixed locations of their major fuel system components.
I donât know this for certain without doing some research but itâs a plausible reason why.
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There is a fuel valve on the rear panel of the G2.
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Mixture vs Fuel Valve
The mixture lever restricts the fuel in the carburetor whereas the fuel valve is a valve that is either open or closed on the fuel line. They both starve the engine from fuel shutting it down essentially. The difference is in the operation.
Normal shutdown
Use the mixture to shut down the engine in NORMAL operations.
In case of Fire
In case of a fire closing the fuel valve is part of your vital action in case of an EMERGENCY.
Credit to Guimbal, screenshot taken from the G2 Manual.
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I agree itâs an important document, Iâm not trying to be dismissive of it , in fact I work with them in my professional life but for the subject at hand âmixture leverâ, such a document will say what it is and perhaps itâs state of operation (closed/open) but will provide no clue (generally) when it should be used, if it should be always set at each end of travel or used anywhere in-between.