Cessna 172M flaps and mph?

RyanB

RyanB

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So after a checkout in a 172N, I'm also able to rent a 172M, however the only thing im not fully sure about is the MPH airspeed gauge (im used to knots) and the flaps are not "selectable". Can anyone help me out on this?
 
The plane I did my first solo in was a 172M that was in MPH and had an up and down switch for the flaps.

The FBO where you rent it should have V speeds, if not just base everything off Vso. For the flaps I just try to time 10% increments, the one I've flown is about 2 seconds.
 
Ill have to check with FBO, just wanted some opinions, thanks!
 
I usually count. While still on the ground, cycle the flaps all the way down. While they are going down, just count slowly. Note what number you get to when the flaps stop moving. Divide that number by three to figure out how far to count for 10*, 20*, 30* flaps.

Then double-check by looking at the gauge and by looking out the right side window to see how much flaps have come down.
 
If it helps, on my 337 I can count two seconds and it will bring the flaps down to 1/3. 1 second increments from there will bring it to 2/3 and full. There should also be a guage.
 
As far as speed goes, the flap operating range should be indicated by a white arc on the ASI. As others have said, you will learn the timing and then how to glance down and check.
 
MAKG1 said:
There is a flap position indicator visible in each rear window. It's an FN high wing.
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My 170B just has a "johnson bar" handle.....you don't need to look anywhere, you just do it by feel :D Much better IMO, I've always thought Cessna screwed up when they put electric flaps on their light singles. OTOH they did so I suppose one must deal with it :rolleyes2:
 
The way I deal with MPH airspeed indicators is that I look up the numbers in the POH and use those.
 
I fly a 172M often & count 3.5 seconds for each 10 degrees of flaps (and check visually)…
 
The 172M can go to 40° of flaps which is a lot more than 30° - esp if you have to go around. Also be careful that you don't push the paddle all the way up and leave it there as it will retract all the way when you may not mean for it to… at least I think it does this - I might be confusing it with the 182E I used to fly.

Best to play with it on the ground.
 
Nope, M's will indeed retract all the way unless you stop them.

They behave a little nicer with 40 deg flaps when the DA is a mile lower.
 
DesertNomad said:
The 172M can go to 40° of flaps which is a lot more than 30° - esp if you have to go around. Also be careful that you don't push the paddle all the way up and leave it there as it will retract all the way when you may not mean for it to… at least I think it does this - I might be confusing it with the 182E I used to fly.

Best to play with it on the ground.
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I've never seen a C-172M with 40° of flaps. I know they exist, though.
 
The difference from later 172's is that with the mid-range 172's all you have is an "up/down" switch which you have to hold while watching the flaps or the flap indicator until the flaps reach the desired position, compared to the later switches with detents to preselect flaps in 10-degree increments. Then there are the original 172's with the Johnson bar which mechanically locks at 10 degree increments like the PA28/32 series which sets 10/25/40 flaps and nothing else.
 
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