C152 artificial horizon

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   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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frumpy Members Profile Send Private Message Find Members Posts Add to Buddy List Check-In Staff Joined: 12 Jun 2018 Points: 5	Post Options Post Reply Quote frumpy Report Post Thanks(0) Quote Reply 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!

AHS8553 Members Profile Send Private Message Find Members Posts Visit Members Homepage Add to Buddy List Check-In Staff Joined: 16 Jun 2018 Location: Spain Points: 1	Post Options Post Reply Quote AHS8553 Report Post Thanks(0) Quote Reply Posted: 16 Jun 2018 at 11:18am
	Hi.. Oh yes, you are right..! I hadn't realized that.. Regards.
	AHS8553 Luis Fernández LEVD

Yossarian1943! Members Profile Send Private Message Find Members Posts Add to Buddy List Check-In Staff Joined: 18 Jun 2018 Points: 4	Post Options Post Reply Quote Yossarian1943! Report Post Thanks(0) Quote Reply 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.

frumpy Members Profile Send Private Message Find Members Posts Add to Buddy List Check-In Staff Joined: 12 Jun 2018 Points: 5	Post Options Post Reply Quote frumpy Report Post Thanks(0) Quote Reply Posted: 20 Jun 2018 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.

Yossarian1943! Members Profile Send Private Message Find Members Posts Add to Buddy List Check-In Staff Joined: 18 Jun 2018 Points: 4	Post Options Post Reply Quote Yossarian1943! Report Post Thanks(0) Quote Reply Posted: 20 Jun 2018 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.

frumpy Members Profile Send Private Message Find Members Posts Add to Buddy List Check-In Staff Joined: 12 Jun 2018 Points: 5	Post Options Post Reply Quote frumpy Report Post Thanks(0) Quote Reply Posted: 21 Jun 2018 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.

frumpy Members Profile Send Private Message Find Members Posts Add to Buddy List Check-In Staff Joined: 12 Jun 2018 Points: 5	Post Options Post Reply Quote frumpy Report Post Thanks(0) Quote Reply Posted: 09 Jul 2018 at 12:33pm
	Any word from the developer about this? I've checked several 152s at the local airport, all have a GA horizon. Thank you, Olli