Region of Reverse Command?
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Region of Reverse Command?
It might seem a little bit junky, but I have been asked this. What is the boundary speed for C-152 region of normal and reverse command? I mean at which speed does the C-152 come under region of reverse command?
Pyro says, "You can work it out from the formula:
(-b±√(b²-4ac))/2a"
if you have a mind to, but its just one of those figures that stuck in my head!
Dr
(-b±√(b²-4ac))/2a"
if you have a mind to, but its just one of those figures that stuck in my head!
Dr
Last edited by ForkTailedDrKiller; 9th Feb 2009 at 12:13.
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Starts at the flapped velocity for max L/D
Forky is right. The drag curve is a quadratic eqation and you want to know where its at a minimum.
As J3Pipercub says - If you really must find a number then go for a fly
Hope I don't sound patronising... but you would have to set up S&L with your approach flap, gradually reduce power and trim to maintain height until speed slows to a point where an increase of power is needed to maintain height and speed.
Remember speed for L/D max depends on weight, so reversed command will begin at higher speeds if heavier
As J3Pipercub says - If you really must find a number then go for a fly
Hope I don't sound patronising... but you would have to set up S&L with your approach flap, gradually reduce power and trim to maintain height until speed slows to a point where an increase of power is needed to maintain height and speed.
Remember speed for L/D max depends on weight, so reversed command will begin at higher speeds if heavier
Last edited by jonobishop; 10th Feb 2009 at 00:16.
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Chaps & chapesses... fun as this is, it's not what some of you may be thinking - it's simply a poncey term for being on the back of the drag curve, i.e. slower than best l/d. So around Vx is a decent approximation crossover as posted...
And yes, it will vary with weight.
Crossposted with the above, but just to add, it doesn't have to be flapped, there will be different speeds for different configs.
And yes, it will vary with weight.
Crossposted with the above, but just to add, it doesn't have to be flapped, there will be different speeds for different configs.
Last edited by Mark1234; 10th Feb 2009 at 00:48.
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Oh that kind of reverse command... And here's me thinking "how in the world would you get a 152 up to trans-sonic speeds to have to worry about that kind of thing?"
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It might seem a little bit junky, but I have been asked this. What is the boundary speed for C-152 region of normal and reverse command? I mean at which speed does the C-152 come under region of reverse command?
Region of reversed command
Starts at my front fence or within 100m of my wife...
... I am PIC outside those parameters but when I walk through the front gate, SHE is in command...
... I am PIC outside those parameters but when I walk through the front gate, SHE is in command...
100m or front fence! mate your a lucky one, in my case its 10km or in the suburb hence the term 'region' of reverse command.
and shes the 'old school' four bars and a star checky type.
and shes the 'old school' four bars and a star checky type.
Last edited by hoss; 10th Feb 2009 at 09:09.
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Understand back of drag curve and controls seemed to work the same (or did in the C150 I owned for 4 yrs) so WTF is "reverse command".
Does it just mean "give me more money"?
Does it just mean "give me more money"?
In "Normal" operations, an increase in power is required to travel faster, and a decrease in power is required to travel slower.
In the Region of Reversed Command, an increase in power is required to travel slower, and a decrease in power is required to travel faster.
In the Region of Reversed Command, an increase in power is required to travel slower, and a decrease in power is required to travel faster.
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It is where stick forward = climb and stick back = descent.
Most likely you will encounter it where more power is not an option.
eg (over)loaded at full power and trying to out climb something.
Most likely you will encounter it where more power is not an option.
eg (over)loaded at full power and trying to out climb something.