Hi Graham.
We may be talking apples against pears here BUT if what you say is true
then on takeoff I would be at 100' thinking about retracting the
undercarriage before the ASI has moved from zero.
I agree it takes time to accelerate or decelerate a 600kg mass but the
pressure measurement showing movement relative to the local air mass will
be indicated within a small fraction of a second even using our normal
mechanical manometers that are calibrated in airspeed and could be even
quicker using electronic pressure sensors close to the pitot head.
True an AOA or alpha system would be helpful but I just want to be warned
if through lack of attention or being distracted I allow my speed to decay
, these lack of attention or distraction events usually build up slowly
without it being noticed and I would guess rarely happens over one or two
seconds.
best regards
Tim
On 10 May 2014 22:28, GRAHAM SINGLETON <grahamsingleton@btinternet.com>wrot
e:
> Tim
> don't think so , the ASI won't move (or shouldn't!) until the aircraft ha
s
> accelerated, or worse slowed down and that takes many seconds.
> When it says "stall speed!" you.ve already stalled. Not a lot of use.
> Graham
>
>
> ------------------------------
> *From:* houlihan <houlihan@blueyonder.co.uk>
> *To:* europa-list@matronics.com
> *Sent:* Saturday, 10 May 2014, 14:31
> *Subject:* Europa-List: Re: Europa-List: Re: Europa-List: Europa Crash in
> L=C3=BCbeck/Germany
>
> Hi Graham.
>
> I think you may have put the decimal point in the wrong place. I
> appreciate what you are suggesting but 20 seconds ?
> I bet the real figure is much less than a second.
> Mind you how would you measure the lag , my ASI seems to move at the spee
d
> of light at times.
>
> Tim
>
>
> On 10 May 2014 13:19, GRAHAM SINGLETON <grahamsingleton@btinternet.com>wr
ote:
>
> Or an AoA meter as primary attitude/speed instrument. The ASI is always 2
0
> seconds too late.
> Very sad, I met Manfred while he was building. A very nice man and a nice
> Europa.
> Graham
>
>
> ------------------------------
> *From:* David Joyce <davidjoyce@doctors.org.uk>
> *To:* europa-list@matronics.com
> *Sent:* Saturday, 10 May 2014, 12:36
> *Subject:* Re: Europa-List: Europa Crash in L=C3=BCbeck/Germany
>
> davidjoyce@doctors.org.uk>
>
>
> I strongly suspect that this another case where a SmartASS or the
> equivalent might have saved them both. David Joyce, G-XSDJ
>
>
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