At 12:08 12 July 2020, kinsell wrote:
On 7/12/20 6:05 AM, kinsell wrote:
On 7/12/20 3:09 AM, Tim Newport-Peace wrote:
At 01:17 12 July 2020, wrote:
LX is the only company who has devices for putting flights into OLC
if
you have a FES system.

I think LX is also the only company that offers an ENL suitable for
turbine
(jet) engines. The audible frequency of jets sometimes does not
register
with a standard ENL that is optimized for a piston/propeller
installation.

I think you may mean a MOP type 1b box, which filters to a frequency
more
common with Jet engines.

ENL is always internal to the recorder, but MOP is usually a remote
sensor.


With a Jet, the main noise is from the Jet Pipe(s), so the sensor
needs to
be (ideally) mounted in a suitable place to the rear of the piles,
which
usually mounting the sensor at the rear of the engine bay. Hard to put

a FR
there as it usually requires removing the engine to gain access.

If LXV is the only company to invest in designing, building and
gaining
approval for a MOP box, it is not the fault of LXV. These are
commercial
decisions by themselves and their competitors.

Also, it is OLC's decision to require a MOP type2 recorder for FES,
not
IGC's.


Looking at LX Navigation (as opposed to LX Nav), they claim to have the

"Worlds first standalone MOP flight recorder with IGC approved sensor
for gliders equipped with jet or electric engines".Â* That makes it
sound

like the same hardware is usable for FES or jets.Â* Which seems
unlikely.

Withe the ear-splitting noise from a jet engine, you'd think they could

come up with a panel mounted ENL system that was suitable for jets.

Of course FES doesn't cover all all electric gliders, I suppose OLC will

have to change their rules again when the AS 34 and GP-15's start
flooding the market.Â* Any day now.

They could still require a MOP type 2 ;=)


Oops, left out the Electric Libelle.

You are referring to the LX Navigation LX MOP IGC (Sometimes refered to as
a Type 3 MOP).

It records MOP for Jets with a maximum sensitivity at about 6000Hz and ENL
for the rest peaking at 150Hz.

"This small recorder is designed to be installed close to the maximum sound
produced by an engine. The approval does not include other positions that
produce small ENL/MOP numbers".

If mounted in the engine bay to conform to the requirement of being close
to the Jet Pipe(s), retrieving files could be an issue.