Today's Message Index:
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1. 04:37 AM - vne speed (Airgriff2@aol.com)
2. 07:04 AM - Re: vne speed (Aero Siam)
3. 12:57 PM - Re: vne speed (Thom Riddle)
Message 1
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Good morning, I know the vne speed for the SLSA Allegro here in the US is
posted at 137mph as the FAA regulates it to a maximum138mph. What I am
wondering is what is the design speed of the aircraft? What are the speeds for
this
plane in other parts of the world? Is the VNE in Europe or Asia the same? Was
the plane actually designed to go faster, safely?
Fly Safe
Bob Griffin
Message 2
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--> Allegro-List message posted by: "Aero Siam" <paul@aero-siam.com>
Bob
As quoted by the manufacturer, the Vne of the Allegro 2000 is 220 kilometers per
hour which is 136.71 mph or 118.8 knots.
This is the design Vne and there are no variations of this.
One regional variation that does exist is the maximum take off weight. In some
European countries, this is limited to 992lb but the design take off weight is
1146lb.
On the subject of V speeds, I asked the factory whether there was a different VFE
for first stage flap as is the case for some aircraft particularly given that
the Allegro has an unusually large second stage flap deflection (from 15 to
48 degrees). They said that for safety and simplicity, the VFE for both stages
is set by the designer at 60 knots but in reality, VFE stage one flap was probably
higher.
However, if the design stipulates 60 knots for both stage one and two, let's stick
to it.
Regards
Paul
Aero Siam
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=11229#11229
Message 3
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--> Allegro-List message posted by: "Thom Riddle" <jtriddle@adelphia.net>
My ASI reads roughly 10% faster than CAS over most of the speed range so I add
this to the IAS for Vfe and other V numbers. Speaking of ASI errors, has anyone
tried to adjust their ASI to make their IAS read closer to CAS?
On a related subject...
The USA LSA limitaion for Vs (45 knots - w/o flaps) is probably what allowed the
MTOW (MAUW) to be raised to 1,232 lb (560 kg) in the USA. The test results in
the operator's manual indicates a CAS for stall with 0 flaps to be 43 knots
at a weight of 520 kg. thus allowing a higher MTOW and still meet the max. Vs
limitation.
Thom in Buffalo
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=11301#11301
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