Shipbucket

Thanks for the feedback,

- Might swap for a (small) hull Sonar
- Swap for a (cheap/old) 40mm/60 (or do you think that would lose a significant capability ?)
- May play with my boat deck etc.
- Post full backstory....

JSB

In that case you might as well go all the way and just fit a 20mm machinegun. The 40mm/60 is less than useless against modern aircraft and you're unlikely to meet a surface target in the GIUK gap that can't be handled by a 20mm but a 40mm can. Also, since nobody makes the 40mm or its ammunition anymore it's not going to be cheap to operatw for long.
Lastly you really need a towed array. It's the only justification this kind of minimalist platform has.

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“Close” only counts with horseshoes, hand grenades, and tactical nuclear weapons.
That which does not kill me has made a grave tactical error

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Source Materiel is always welcome.

I don't think so, although an earlier version of the 40mm/70 is most appropiate.

The L70 fires a completely different round Judah.

The best bet is either a single or twin enclosed Oto Breda 40. Which would be a hell of a lot nicer for GIUK.

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AU Projects: | Banbha et al. | New England: The Divided States
Blood and Fire

Like I said, nobody makes 40mm/60 ammunition. Modern 40mm/70 ammunition is almost four inches longer than /60 ammunition.
ANd while I don't know for sure, I doubt any of the spare parts are compatible either.

_________________
“Close” only counts with horseshoes, hand grenades, and tactical nuclear weapons.
That which does not kill me has made a grave tactical error

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Source Materiel is always welcome.

Norwegian Nammo makes 40 mm ammunition both L/60 and L/70

40mm - L/60 HE-T, L/60 TP-T, L/70 HE-T, L/70 TP-T
40mm AGL - MK285, RF, MK315 - HEDP, MK314 - HEDP, HEDP/SD, HE, TP-T

http://www.nammo.com/what-we-do/ammunit ... m-caliber/

I blame that error on a long day at work and a lack of sleep. Ooops.

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𝐌𝐀𝐓𝐇𝐍𝐄𝐓- 𝑻𝒐 𝑪𝒐𝒈𝒊𝒕𝒂𝒕𝒆 𝒂𝒏𝒅 𝒕𝒐 𝑺𝒐𝒍𝒗𝒆

From Navweps So I would think an old 40mm/60 could be used (maybe in a fiberglass dome to look after it).
Options,
1) 76 mm/62 (3") Compact (does it actually work ?) Compact including ammunition and off-mount components: 18,783 lbs. (8,520 kg)
2) 40mm/70 - 2,800 to 6,300 kg (single or twin)
3) 40mm/60 - 522 kg
4) 20mm x2 or .5' x2 - cheap and light

Since I intend to rely on Sea sparrow as my 'main' weapon do I need anything more than (4) ?

I had always assumed that the compact used the 3'/70 shell rather than 3'/50 well you learn something new every day .

JSB

The OTO gun works as advertised to my knowledge as long as you don't try to burn through the entire drum at maximum rate of fire, but that's the same for every gun out there. It's also one of the most ubiquitous medium guns out there. The Italians received a number of exUSN DEs after the war and they really liked the guns they came with.

Also, your data is somewhat skewed. The weight you've given for the L60 is only for the gun, not the mounting. Once you include the mounting you're looking at at least another 1000 kg.

What gun you choose depends on the exact mission requirements. You're unlikely to say the least to run into any surface targets more threatening than the occasional unruly fisherman, so it depends on how much AA you want it to provide. If none then a couple of HMGs should do the job just fine, otherwise you'll have to choose between the OTO and the L70. The L60 falls between the chairs here since it's of no use against modern aircraft and it's no better than a HMG at stopping fishermen. Small craft swarms weren't considered a threat at the time and they still aren't in the GIUK gap.

And from what I can see Nammo doesn't actually produce L60 ammunition at the moment. They have the tooling to do so and they'd be more than happy to make you some, but you'd be stuck with questionable honour of footing the bill to keep an entire production line open. Not a problem if you're the RN or the German navy, rather more so if you're Belgium or Portugal.

_________________
“Close” only counts with horseshoes, hand grenades, and tactical nuclear weapons.
That which does not kill me has made a grave tactical error

Worklist

Source Materiel is always welcome.

Well, stockpiles of the older ammunition would still be around for the commissioning period of the original competition for the challenge, that said the L70 is still a much better option. As for pew-pew equipment I'd vote for the 76mm and a pair of smaller calibre things well aft, 20mm or 30mm crew served mounts namely.

_________________
AU Projects: | Banbha et al. | New England: The Divided States
Blood and Fire