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C152 artificial horizon

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frumpy View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote frumpy Quote  Post ReplyReply Direct Link To This Post Topic: C152 artificial horizon
    Posted: 12 Jun 2018 at 3:04pm
Hi guys,

I'm not (yet) a customer of the C152. I was wondering about
the attitude indicator design, it's a commercial instead of GA design.
The difference between these two is the way the rollindex works -
in the commercial (like Boeing) design the index is a skypointer (it
always points upwards into the sky), in the GA version the index
is grouped with the plane symbol (which has been proven to be
a better design).
I wonder why you put a commercial one in there, was this intentional?
Never seen a C152 with one like that. Are you planning in offering a GA version too? :)

Thanks!
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AHS8553 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote AHS8553 Quote  Post ReplyReply Direct Link To This Post Posted: 16 Jun 2018 at 11:18am
Hi..
Oh yes, you are right..!
I hadn't realized that..
Regards.
AHS8553 Luis Fernández LEVD
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Yossarian1943! View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Yossarian1943! Quote  Post ReplyReply Direct Link To This Post Posted: 18 Jun 2018 at 8:43pm
The attitude indicator seems to be a RC ALLEN 22 model. I found one C152II, N757PT, on the internet which is equipped with an RC ALLEN 22.


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frumpy View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote frumpy Quote  Post ReplyReply Direct Link To This Post Posted: Yesterday at 1:27pm
This is the catalog for the RC ALLEN 22:
https://www.kellymfg.com/images/RC%20ALLEN%20Catalog.pdf

And this is one moving:
https://www.youtube.com/watch?v=9bfuXe6TIoA

It looks like the -22 is a general aviation (fixed pointer) design.

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Yossarian1943! View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Yossarian1943! Quote  Post ReplyReply Direct Link To This Post Posted: 23 hours 40 minutes ago at 10:20pm
In the PA 28 Warrior the Allen RC  22 works like shown in the video.

Maybe Just Flight should use this one  for the  C152 too.


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frumpy View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote frumpy Quote  Post ReplyReply Direct Link To This Post Posted: 15 hours 29 minutes ago at 6:31am


I did some studies on the different horizon designs at university. It was shown that the GA
design is significantly better in reaction time and reliability of use compared to the commercial
design. This is because pilots tend to "move" the rollindex in a compatible fashion with
the yoke - the commercial design is counterintuitive. This is why I believe the C152 as a
basic trainer should have a GA horizon.
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