If they have no GPS coupling they probably self correct by assuming that you are
flying straight and level most of the time and average the input. Which may
seem the correct thing to do but in real IMC it may be possible that you very
slowly divert into a bad attitude and the AI adapts to it so it doesn't show you
that things are not going so good.
Some of the Android and iPad implementations are written by non-pilots and are
essentially a bubble level bar but with a AI picture on it.
Anyway I would surely investigate how the AI corrects for the drift. If they
claim
the unit has zero drift they are lying.
Frans
Karl Heindl <kheindl@msn.com> wrote:
>Frans,
>You are probably right, but some manufacturers are marketing pure
>electronic AI's and DI's.I think MGL is one, and RC ALLEN have a
>certified one for a few grand. I don't see any mention of GPS coupling.
>So what makes one a joke and another that works ? I don't like any of
>the EFIS units, but am very interested in replacing my vacuum gyros
>with same size electronic gadgets.
>Karl
>
>
>From: asarangan@gmail.com
>Date: Sun, 6 Oct 2013 21:16:24 -0400
>Subject: Re: Europa-List: ADI on android
>To: europa-list@matronics.com
>
>While I agree with you that most of these devices are unsuitable for
>inflight use, the reason for that lies is the product design, not the
>technology. Solid state technology certainly can deliver accurate
>signals to fly in IMC if they are designed and tested for that purpose.
>The ipad, iphone etc.. were designed for an entirely different purpose,
>so we should not blame the technology for their lack of performance in
>an airplane.
>
>I remember being told the same thing about GPS back in 1997. The old
>ADF was considered far more flight worthy than the GPS.
>
>
>On Sun, Oct 6, 2013 at 6:27 PM, Frans Veldman <frans@privatepilots.nl>
>wrote:
>
>
>Most of these things are a joke. They measure the direction of gravity
>so on the ground they appear to work, but while pulling G's they show
>the wrong thing. Even when implemented correctly you have the problem
>that solid state gyros have a very high drift. They work only a few
>minutes if they are not corrected by some external reference, like a
>GPS signal. And that makes them pretty useless.
>
>
>Frans
>
>Karl Heindl <kheindl@msn.com> wrote:
>
>
>Hi Graeme,
>A friend of mine showed me his new Samsung with Android, and an app
>which cost $ 1.87 and it is an attitude indicator. I thought it was
>absolutely amazing, very sharp resolution and instant response. Stick
>it on your instrument panel and away you go.
>
>
>Karl
>
>
>> Subject: Europa-List: ADI on android
>> From: graeme@gdbmk.co.uk
>
>
>> Date: Sun, 6 Oct 2013 13:23:57 -0700
>> To: europa-list@matronics.com
>>
>
>
>>
>> Ive just installed skydemon on a new nexus7 with the PFLARM, I
>noticed though the tablet incorporates, as well as a high spec GPS; a
>magnetometer, accelerometer, and gyro. It would appear to have the
>essentials for an Attitude indicator and a good deal more, I wondered
>if anyone has been running a attitude good a
>
> pp on a
>similar tablet or phone.
>>
>> --------
>> Graeme Bird
>> G-UMPY
>> Mono Classic/XS 912S/Woodcomp 3000/3W
>> Newby: 75 hours 18 months
>> g@gdbmk.co.uk
>
>
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=409954#409954
>
>
>>
>>
>>
>>
>>
>>
>>
>>====================
>> _===
>>
>>
>>
>
>
>
>--
>
>Sent from my Android phone with K-9 Mail. Please excuse my brevity.
>
>
>arget="_blank">http://www.matronics.com/Navigator?Europa-List
>tp://forums.matronics.com
>_blank">http://www.matronics.com/contribution
>
>
>==========
>==========
>==========
>==========
>
>
--
Sent from my Android phone with K-9 Mail. Please excuse my brevity.
|