Thursday, August 30, 2012

Cessna 172 vs 152 - Identical planes both easy to fly

Cessna 172 or 152 - The little differences that dont matter


This post is catered mainly towards anyone who wants to learn to fly or is new to flying, & wants to know more specifically about the minute differences between the Cessna 172 & the 152 & how to deal with those differences.

As always these are merely my opinions, no one pays me for it. I welcome you to share your thoughts, please post comments on what you think. If Ive gotten something horribly wrong, please speak up ;)

Maybe you have the option of training in the slightly older (potentially obsolete) 2 seat Cessna 152 planes vs paying more & training in the 4 seat Cessna 172 / 182 etc. & are unsure if doing so will impact them in any negative way when moving on to a 172 or other 4 seat Cessna, or even to other 4 seat air craft.

Short answer, NO it doesnt matter.

I will also cover the few minor differences I did find & how I handled them & what I think about them.

If there is little (or affordable) price difference between training in a 172 vs something else in your flight school, the Cessna 172 is obviously recommended as a 4 seat is what you'll likely fly as a private pilot flying with your freinds & family for day trips.
But that is not the point of this post.

The only fairly noticible difference across the aircrafts is that with the 172 you WILL USE YOUR RUDDER FOR REAL, pressing it quite agressively when needed for all the reasons you were explained in your ground theory, but never had to do so with a 152, it wasnt that important.

Some non technical & non flying literate people out there seem too happy to ditch dirt at training in the humble 152 just because it is now old & outdated & the 172 is probably going to get them more profit.
They may tell you that there are many significant differences betwen the 2, while elaborating on how 152 is 2 seat & 172 is 4 seat over & over again, & youre better off starting with the 4 seat 172 to learn to handle the bigger engine & the inertia & the bigger size etc
Bullshit


Most of my flight training has been on a Cessna 152, 25 odd hours, with compartively only 4 odd hours on a Cessna 172, & Ive flown the mighty Cessna 182 once as well.

I found the Cessna 172 as easy to fly as a 152!
It was slightly different, & Ill expand on how to cater for the differences below in this post.

The 152 is so similar to 172 that most Air speeds & EFATO & turn co-ordination & basic numbers you need to be mindful of are very close.
Just add 5 knots of speed when in a 172 to your 152 numbers & youll pretty much be on the mark for everything including landing approach speeds & best take off climb speeds etc.

The related instruments are all very similar. Your TMFIHC & your BUMFH checks will be just as easy to perform as your EFATO & your flap efficieny at the different angles.

If you close your eyes, get into a 172, & were convinced that this is just a mates newer 152, I promise you it will not be all that different. Even if you fly a 172 exactly like a 152, you wont crash.


You might also hear comments on how the 152 so really easy to fly & the 172 will then be an entirely different ball game.
Bullshit

Firsty, all Cessna 152 & 172 & 182 are basically very easy to fly!
Thats why Cessna are the number 1 training aircraft.

If you want to make your life hard, go fly a tail digger.
So I dont believe in this idea of flying difficult things just because thats the way to learn.
By that measure we should never use calculaters, only paper & pencil.


Some differences that will be apparant & how to deal with them:


1) When on the ground/taxi'ing, the dashboard will seem quite high, & overall youll feel youre into a deep cockpit. The horizon will be at a different point in your windscreen to a 172.
- Just look 50 metres ahead of you when taxing, & also use the side windows more. Take a reference point & taxi to it, works well.
If you are really not tall enough despite setting the seat height, dont hesitate to taxi the plane diagonally left to right every few seconds to get a better view like the old WWII planes need to.

2) When turning on ground, the radius might seem larger.
Its a slightly bigger plane so there is a slight difference, but moreso, use more selective break when turning & you will be fine.

3) When you accelerate for takeoff, the plane will pull a lot more to the left than a 152.
Well big engine more torque no surprises right, just push the rudder in agressively.

4) Turn & slip co-ordination when entering a bank & pulling even rate 1 turns (under 15 degrees bank)
Again, as you know ancillary yaw happens to all aeroplanes, with this one, slightly more noticible so keep a look on your slip indicator ball & push the rudder as needed. With the 152 you'll normally find the push is only needed during entry, but in the 172 youll need in a fair bit into the turns as well.

5) Backpressure in slow turns (ie how much to pull on the yoke)
Thankfully, at cruise speeds, the more powerful 172 will let you manoeuvre the aircraft with easy, especially after a good trim. But on slow speeds, things get a little interesting. Be prepared to give your left hand one hell of a workout. YOU NEED TO PULL THAT YOKE HARDER THAN IN A 152. At slow speeds, its expected in any aircraft, but its probably due to extra weight in the 172 that you notice it.

6) The horizon position is much lower in the windscreen than in a 152, noticible most during straight + level at 2300 - 2400 RPM downwind
Remember when you were on the ground & thought the cockpit was too deep & the dash too high, well, its the opposite now yay! Thanks to the extra engine power, youre Attitude is more horizontal than in a 152. Youll love the beautiful view of things underneath you.
I find straight + level attitude can be mainted easily if you can only just see the end tip of the front engine hood all the way down in a slop. In a 152, its S+L when you cant quite see the tip.

7) Engine power is immediately apparant in rate of climb
Yup, want to climb 1000 feet in a minute. No problem :) But jokes aside, because you have this power, be mindful that you dont get too high before you level. Take PAT & APT action sooner to desired Alt than in a 152.

8) Remember that your recommended landing approach speeds are around 5kts faster than a 152
Your stall speeds are thus also higher, be aware of that. Yes, its likely you wont kill yourself because if you forget, the stall warning will kick in, but be mindful. Anything under 55 bad idea for a beginner. In a 152, its 65 for starters & 60 tad later, & 55 when youre better, so just add 5 & youll be fine.

9) Weight of plane will make its presence felt at flare entry
Pull a tad sooner than a 152 for the smoothness. Dont worry, itll feel different the first few times but as long as you get the numbers right & your basic technique in landing is good, youll be fine.

10) You will have a lower nose attitude & different view of runway before flare.
Well, youve got more power, more flap but still you might notice that just before entering the flare, youre keeping the nose angle pointed a bit more toward the ground then a 152. And then there is the rapid pull up to smooth out the touchdown. This is just timing & practise to smooth out, but you wont crash or feel scared, same as a 152, tad more practise & youll be fine.

Well thats it for now folks.
Have any of you out there been through the experience of learning to fly on either or both, or ever had to switch? What do you folks think. Please share your thoughts.

Happy Flying!

8 comments:

  1. Replies
    1. Hey thats great thanks for letting me know that this was helpful. What sort of flying do you do?
      Have you done any in a Cessna before? Cheers

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  2. Learning to fly...again, and in a 172. Been in a 150 in the past, and I prefer the 172 because its windy here and it's not kicked around as much. If it were a calm, east coast US location, I'd go with the 150.

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  3. Yes that's valid point. Out here in New Zealand you get kicked around no matter what plane you're in as most days are generally windy so we often don't think about it haha

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  4. Awesome Post. I was stuck when I got to the part of many aviation websites where they posted the rates between the two.

    I especially like the BULLSHIT parts. OMG. Very informative and funny at the same time. You must be a truly sincerely person.

    I certainly feel more EMPOWERED to speak for myself after having read this post.

    QUESTION:

    Would it be a good idea then to start in the 150 and then later on switch to the 172 for purposes of experience. If yes, how many of the 40 hrs do you recommend for each?

    Very valuable post.



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    Replies
    1. Thanks Kenneth glad to know you enjoyed, yes Im known to be a frank person haha. If the price difference isnt substantial, then its not that the 150 will teach you something extra that the 172 wont. Its only when the price is cheaper in a 150 that you want to start there & then switch to a 172. If you dont mind the price difference, just stick to a 172 :) I'd say you should do your training with an instructor on both planes, that way you have a good balance. Then when youre ready to go full on with just the 172, make the switch. So Im assuming youll land up doing 1/3rd in a 152 & rest in a 172 if the 172 is what you ultimately want to site your flight test in. But mind you, I havnt got my PPL yet, so please do listen to what your instructor also recommends as he observes you fly, that will be a more accurate way to make the split.
      Hope tha thelped. Happy flying!

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  5. Excellent write up. I have flown Cessna 150s, 172s, 182s, 206s, Piper PA28s and a few others. I did my training in a PA28 and immediately transitioned to a C172 as an owner. None are so different that you will hurt yourself as long as you do a good review of the systems and limits prior to flying. Just like when you switch cars from a compact to a full size sedan and have to figure out its size and feel when in use. Bottom line is get your license however you can (cheaper is good) and then fly! One side note, heavy controls and hard inputs can be a sign of imbalanced or poorly rigged control cables. My plane is a Cessna 172K that has been in our family for a long time with a lot of loving care. It has very sweet control balance and is a hands free cross country flyer once trimmed out. You may have to man handle a rental or trainer but when you move to ownership your can correct and soften those control loads with a good riggers help. GO GET YOUR LICENSE AND GO FLYING! - Keith in USA

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    1. Thanks Keith great post. Youve made a very good point about controls being tuned, which quite possibly explains why the club planes may have felt that way to me. I didnt think about that, thanks. And yes dead right, there is no substitute to just going out there & flying more. The differences soon disappear.. :)

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