71mm LYRAN Illumination Mortar.

[ron3350]

I found information on this Bofors designed 71mm Lyran Illuminating mortar shell as used on AFV's and by Infantry and Navy.
Apparently the mortar can also fire HE and smoke shells too. Used from mid 1960's.
The fuze has a safe position and 1, 2 or 3 dots for different range settings . (info from the net).
What is missing from the fuze centre on this example? I could not find any photos of the shell to compare.

 

[sgdbdr]

Here is a drawing :



Cheers,

S.

 

[sgdbdr]

And a description of the system :

 

[rigby]

Swedish Drawing

 

[Bellifortis]

I found information on this Bofors designed 71mm Lyran Illuminating mortar shell as used on AFV's and by Infantry and Navy.
Apparently the mortar can also fire HE and smoke shells too. Used from mid 1960's.
The fuze has a safe position and 1, 2 or 3 dots for different range settings . (info from the net).
What is missing from the fuze centre on this example? I could not find any photos of the shell to compare.

View attachment 177141View attachment 177142

Hallo @ron3350,
there seems to be nothing missing from your fuze. The square hole in the center seems to be a keyhole for setting the fuzedelay. Switzerland also introduced this model and manufactured it in licence from Bofors. The interesting thing about this fuze is, that it uses the same system as the 150 year old belgian Bormann fuze with a horizontal powder train delay. Attached are 2 fotos from the nice swiss book "The Fuzes Of The Swiss Army"(in german)
Bellifortis.

 

[ron3350]

I now understand a lot more about this mortar so thanks to everyone. Ron.

 

[Eggburt1969]

And a description of the system :

View attachment 177144 View attachment 177145

I may not work for Jane's/Janes any more, but this would seem to be a page scan from one of their publications, which is copyrighted.

 

[Ruuti]

Box set.

 

[Yodamaster]

Box set.

View attachment 177806

And on the picture of Ruuti, you can see in the middle of the lid of the container the setting key of the fuze


Yoda

 

[Bellifortis]

And a description of the system :

View attachment 177144 View attachment 177145

I would not like to fire this mortar. The crotch of the shooter is touching the bottom of the barrel, where the firingpin is fastened. I think that the system is safe to use, but having your crotch touching the explosion chamber would have desastrous results on a catastrophic malfunction.