Today's Message Index:
----------------------
1. 06:59 AM - Uses for aluminum disks (TELEDYNMCS@aol.com)
2. 01:25 PM - Vne Speed (h&jeuropa)
3. 01:41 PM - Re: Vne Speed (Gilles Thesee)
4. 03:22 PM - Re: Vne Speed (Graham Singleton)
Message 1
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| Subject: | Uses for aluminum disks |
In a message dated 12/12/2006 2:58:39 AM Eastern Standard Time,
europa-list@matronics.com writes:
Hi Ian,
Does anyone have a use for a number of (just under) instrument size
aluminum disks?
I made an aileron control lock out of two of the disks. Ease the edges
first, then glue some of that non-slip shelf liner stuff to one side of each.
Then, a short piece of string or a thin bungee cord between the two completes
the
lock. Slide the string into the gap between the aileron and the wing tip or
the aileron and the flap and you have an effective, light weight aileron
lock. I painted mine orange for high visibility.
I used a hole saw fitted to my drill press to cut out my instrument holes
once the location was established. The radio bay was cut using a jig saw first,
then finalized with a Dremel tool and a fiber cut off wheel. Taping the
surface with masking tape prevents marring of the surface with the jig saw.
Regards,
John Lawton
Dunlap, TN
N245E - Flying - 75.6 hours
Message 2
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I have recently become aware that Vne is normally expressed in True Airspeed (TAS).
According to Derek Piggotts Gliding text, it is important to limit indicated
airspeed so the true airspeed is kept below the Vne placard speed. Otherwise
there may be risk of flutter and structural failure.
My XS Owners Manual states that Vne is 165 kts (page 2-1, issue 1). The same manual
states that for a 914 typical performance is Cruise speed (100% @ 10,000
ft) 170 kts TAS (page 12-2, issue 1). But that is 5 kts greater than Vne!!
That page also states Top Speed (sea level) 144 kts RAS. What is RAS? Is it
a typing error (R is adjacent to T on a keyboard)? RAS is also referred to on
the 912 performance page.
What are the performance numbers for the MG? Brochure says 151 kts TAS max cruise
speed for 914 at 10000 ft. So is 151 KTAS Vne?
It is very easy to exceed 165 KTAS when descending from altitude. Should this
be avoided?
Jim Butcher
XS N241BW
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=81100#81100
Message 3
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Jim and all,
>
> I have recently become aware that Vne is normally expressed in True Airspeed
(TAS). According to Derek Piggotts Gliding text, it is important to limit indicated
airspeed so the true airspeed is kept below the Vne placard speed. Otherwise
there may be risk of flutter and structural failure.
>
Correct
> My XS Owners Manual states that Vne is 165 kts (page 2-1, issue 1).
165 kt TAS at 100% power and MTOW is a respectable speed indeed. Has
anyone on the list performed accurate measurement of TAS on his Europa
(three GPS routes with recorded weight and OAT, etc.) ?
> ....
>
> Brochure says 151 kts TAS max cruise speed for 914 at 10000 ft
151 kt TAS cruise ( @ 75% power) at MTOW is also a very very respectable
speed, even at 10000 ft. But these are 'brochure numbers'.
I would be much interested in real world numbers.
Regards,
Gilles Thesee
Grenoble, France
http://contrails.free.fr
Message 4
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Jim
RAS is I assume Rectified Air Speed. Corrected for instrument and
position errors. (The position of the static and pitot sensors. )TAS (
true air speed ) is IAS corrected for altitude and temperature and it
will usually be higher, so you could still be below Vne.
Graham
h&jeuropa wrote:
>
>I have recently become aware that Vne is normally expressed in True Airspeed (TAS).
According to Derek Piggotts Gliding text, it is important to limit indicated
airspeed so the true airspeed is kept below the Vne placard speed. Otherwise
there may be risk of flutter and structural failure.
>
>My XS Owners Manual states that Vne is 165 kts (page 2-1, issue 1). The same
manual states that for a 914 typical performance is Cruise speed (100% @ 10,000
ft) 170 kts TAS (page 12-2, issue 1). But that is 5 kts greater than Vne!!
That page also states Top Speed (sea level) 144 kts RAS. What is RAS? Is it
a typing error (R is adjacent to T on a keyboard)? RAS is also referred to
on the 912 performance page.
>
>What are the performance numbers for the MG? Brochure says 151 kts TAS max cruise
speed for 914 at 10000 ft. So is 151 KTAS Vne?
>
>It is very easy to exceed 165 KTAS when descending from altitude. Should this
be avoided?
>
>Jim Butcher
>XS N241BW
>
>
>Read this topic online here:
>
>http://forums.matronics.com/viewtopic.php?p=81100#81100
>
>
>
>
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