a replacement for the well-known Type 316 and 317 helmets, the Type 458/459 was developed.
The manufacturers full name is L'Optique Scientifique Gučneau but the firm has dropped
the Gučneau name on the latest series of helmets (Type 500/600) after becoming a part of
the ELNO group.
Type 458 series
This is a monobloc dual visor helmet made of stratified material and can be equipped with:
-Yellow high contrast visor
-Type 601-laser protective visor.
-Type "N" glare protective/anti flash visor.
Further the helmet has a rack suspension for the oxygen mask (Ulmer Type 82 series) two
ear cups to hold the earphones and an inner liner composed of dual semi-shells. A notable
feature of this type of fighter helmet is the lack of chin pad/strap as the oxygen mask is
used as this. This is however only save with ejection's not exceeding 450 knots. Above
this speed a chinstrap is needed.
458-00- -Helmet assembly without electric-acoustic accessories
458-01- -Helmet assembly with high impedance electric-acoustics
458-02- -Helmet assembly with low impedance electric-acoustics
458-20- -Type 458-20 the same helmet in use with the "Aeronavale".
458-30- -Type 458-30 this is the high altitude version.
A three-digit number that indicates the sizes follows this number.
Type 459 series
This is the light aircraft and helicopter version of the Type 458. This helmet features
the same shell as the Type 458. The dual visor setup has the same visors as the Type 458
but instead of the Type "N" anti-flash visor a blue visor for blind flying can
be used. Further difference is the use of a chin-pad.
459-1- -Type 459-1 helmet for the use in Airforce helicopters using the ELNO 109 SP 108
459-2- -Type 459-2 helmet for use in the TB-30 Epsilon and CAP series trainer and
aerobatics aircraft. Helmet fitted with SILEC-S4443 acoustics.
459-3- -Type 459-3 designed for Army helicopter pilots with SILEC-SP4103 and SP1060
Both helmets can or will replaced with the L'Optique Scientifique Type 500 for the fighter
and Type 600 for the helicopter pilot. A new high altitude helmet is also designed and