Would it be accurate to say that the only or the main advantage HAPCs like Namer and Achzarit, when they were introduced, provided over IFVs are that they are much more heavily protected?Apart from several drawbacks compared to a specially designed vehicle, the question is, who actually wants a HAPC?
Apologies, I'm a bit lost here. Is this why Namer and Achzarit are armed only with an MG fitted to an OWS and nothing heavier? Wouldn't this be a bit risky if both types of vehicles found themselves in a position where they were faced with other IFVs that could not be penetrated by their on board MGs, and they did not have MBTs to support them?Not many countries agree with the Israelis that the tanks are the sole direct fire platforms while the (H)APCs act as passive battlefield taxis (and IMHO that idea is questionable after Lebanon '06)..
IIRC didnt the WW2 QF 25lber field gun have a direct fire AT capability?No problem, mate.
Anyway Artillerie im Gefecht Teil 2 2/2 - YouTube shows why SPGs have optics for direct laying. (Starts around 8:30, armored rec. units arrive in the vicinity of the SPG, gets spotted by the close OP, phones the guns with the direction of travel and distance. A crew member shouts "Sh**".
Several things made the idea of converting tanks into HAPCs a viable idea for the Israelis. The tanks used were models which the IDF didn't want to integrate into their armoured corps, converting them did cost less than designing a new vehicle or ordering one abroad.Would it be accurate to say that the only or the main advantage HAPCs like Namer and Achzarit, when they were introduced, provided over IFVs are that they are much more heavily protected?
In your opinion what are the main disadvantages in operating HAPCs over IFVs or in operating HAPC alongside MBTs, like you would with IFVs?
Apologies, I'm a bit lost here. Is this why Namer and Achzarit are armed only with an MG fitted to an OWS and nothing heavier? Wouldn't this be a bit risky if both types of vehicles found themselves in a position where they were faced with other IFVs that could not be penetrated by their on board MGs, and they did not have MBTs to support them?
A Heavy IFV would resolve that problem, wouldn't it? Russia is currently developing one on the Armata platform. It would have the necessary mobile fire support, while still delivering dismounts.Several things made the idea of converting tanks into HAPCs a viable idea for the Israelis. The tanks used were models which the IDF didn't want to integrate into their armoured corps, converting them did cost less than designing a new vehicle or ordering one abroad.
As for the Israeli ideas behind HAPCs. The IDF sees the MBT as the main delivery plattform for direct fire. The HAPC needs to bring the infantry to their dismount point and while doing so protect them as much as possible.
The problem I have with this is that during the mobile mounted combat phase the MechInf is largely passive. To add their firepower to the battle the infantry needs to dismount and disperse which costs time and slows down the whole combined arms group. An advantage is that a HAPC usually carries more dismounts.
My problem is the lack of firepower while being on the move as well as the lack of general firepower compared to a mechinf unit equipped with IFVs. The two Iraq wars are good examples of how the firepower of IFVs was important for the success of several combined arms units.
The discussion IFV/APC is a rather big one and contains so much ifs, but is interesting to see how and under which circumstances such designs were chosen and operated. The BMP-1 was IMHO a early Cold War design with a WWII take.Jup, it would.
Protection is one thing with which I agree wholeheary with the Israelis. There is no reason why the MechInf should be much less well protected than their tank brothers. But I think we are also seeing a trend here. The Puma is 43 tons which is alot. The CV90 also got much heavier with the years.
IMO the russians are actually doing it right and the Israelis would do it right, too, if they would make a proper IFV out of it. Ideas about SAMPSON 30mm/Spike weapons stations are circulating, though.
A medium caliber 35mm to 40mm high velocity autocannon may be a better choice, particularly if the vehicle is operating with the tanks. A HE round with a multi-option fuse allowing time/distance airbursts, impact, and impact plus delay is a better choice for a) than a heavy shell, and the APDSFS can penetrate anything except the frontal armor of a MBT. It also allows a much larger number of sowed kills.3) A low-velocity gun/machine cannon (BMP-2) could greatly increase the firepower of the section against
a) enemy infantry in the open or in cover
b) enemy AFV in particular those lighter then a MBT.
I know nothing about such plans, however I find it interesting to compare the peace-time defense industry to some extent to a peace-time army. How to manage it in times of little demand and how do plan a potential rapid expansion in times of need? A great degree of useful skill set is found in the rest of the industry/economy, and a broad and deep base is incredible important for a war industry, but a robust, experienced and specialized core is needed to expand quickly or to just keep things going. (This is also one of the reason why procurments are often quite inefficient, as they are mostly seen as keeping the national base intact and people employed)If the US plans on mothballing the Lima plant for 4 years, then spooling back up for the M1A3 upgrades...then what are all those tank construction specialists (a pretty niche and obscure skill I imagine) going to do for 4 years? Work at Walmart?
"Hey we need to not pay you for 4 years, but don't go anywhere since we'll need you later and no-one else in the US has your skill sets".
There seems to be a logical flaw here....
Adrian
Actually the reasons procurement in the US is so inefficient is because they do switch off factories, and especially development projects on and off, and designate their personnel for layoff, nearly every year because of funding delays from the (non)budget cycle. The personnel, needless to say, find new jobs elsewhere and when that years funding finally gets decided and released they have to hire new people and get them up to speed. Then, just as they are hitting their stride, the funding runs out at the end of the year because the budget is delayed and the whole cycle starts over again.I know nothing about such plans, however I find it interesting to compare the peace-time defense industry to some extent to a peace-time army. How to manage it in times of little demand and how do plan a potential rapid expansion in times of need? A great degree of useful skill set is found in the rest of the industry/economy, and a broad and deep base is incredible important for a war industry, but a robust, experienced and specialized core is needed to expand quickly or to just keep things going. (This is also one of the reason why procurments are often quite inefficient, as they are mostly seen as keeping the national base intact and people employed)
In this sense you can not just switch a factory on and off, as Adrian wrote.
The trend has been of course towards such cannons, with an increase in calibre complimented by ATGM and MGs.A medium caliber 35mm to 40mm high velocity autocannon may be a better choice, particularly if the vehicle is operating with the tanks. A HE round with a multi-option fuse allowing time/distance airbursts, impact, and impact plus delay is a better choice for a) than a heavy shell, and the APDSFS can penetrate anything except the frontal armor of a MBT. It also allows a much larger number of sowed kills.
Put it in a high angle mount, add the proper sensor and aiming equipment, and AHEAD ammunition would allow it to also perform in CRAM (Counter Rocket, Artillery, and Missile), adding significantly to the defense of the combined force.
You only need radar to provide warning and cuing. For actual targeting LADAR is more precise, compact, and difficult to backtrack.The integration of CRAM in an AFV with an already wide array of task should rather costly and complex further increasing the already very high costs. I have little doubt that active defense systems, hard kill and soft kill have an ever increasing utility, possibly ending in an broader intergration. One has however be aware that such active systems based on radar can telegraph their location for capable conventional enemies with receivers. And a heavy artillery concentration with 'dumb' shells, be it with bomblets or conventional can still cause neutralization and partial destruction.
The Phalanx based system uses a lot of ammo because it fires in bursts to establish a pattern similar to a shotgun. The large 35-40mm guns use AHEAD ammunition or time fused projectiles to achieve the same effect with only 1-3 rounds. It can still call for a good amount of ammo, but a platoon of IFVs will distribute the work load between them, so it won't be as bad.How would you handle the ammunition capacity necessary for a CRAM system in an IFV, though? Particularly if you're talking about a calibre of 35-40mm, which I believe was mentioned in the original post. Wouldn't CRAM duties necessitate an impractically large amount of ammunition carried/ready to fire? Seems like it'd get very cramped if you're trying to fit this in addition to passenger capacity, crew protection, etc etc...
There is quite a long list of practical difficulties which I will perhaps post later. I will thus just focus on the viability of such very expensive and complex systems on IFV against artillery concentration. On has to keep in mind that CIWS systems were devoloped as the last layer of defense against a small number of big missiles. Hard-kill suites on AFV rely almost all on radar detection and targeting and destroy the relative slow incoming threats within a certain range band with light launchers which can rotated very quickly. A IFV turret is by a magnitude slower and thus only able to react against threats which allow for a longer reaction time.You only need radar to provide warning and cuing. For actual targeting LADAR is more precise, compact, and difficult to backtrack.
Yes it will be costly. Yes, it can be overwhelmed, any system can, so what? Any bombard that can overwhelm the system to ‘cause neutralization and partial destruction’ will probably be capable of slaughter the protected units without the CRAM systems.
But probably not with conventional shells without either massing a huge number of guns or a sustained bombardment – the former leaves the rest of the front unsupported, the later is vulnerable to counter battery. Based on all available IFVs any such bombardment would almost certainly be against multiple overlapping systems. The system would of course be programmed to ignore shells that will not land near friendly units, similar to the Israeli Iron Dome, which would reduce the effective bombardment strength to be stopped by 60% to 80%.
ICM Cluster rounds would saturate the CRAM systems with fewer rounds, of course. But the small cluster munitions require a direct hit instead of a near miss to be effective against even lightly armored vehicles.
Apples and oranges. CRAM is not a replacement for a hard kill suites. Nor is it for stopping an RPG. Probably be effective against an antitank missile, which have 10x to 20x the range, but only 3x the speed, but the real target is artillery shells, rockets, and mortars.There is quite a long list of practical difficulties which I will perhaps post later. I will thus just focus on the viability of such very expensive and complex systems on IFV against artillery concentration. On has to keep in mind that CIWS systems were devoloped as the last layer of defense against a small number of big missiles. Hard-kill suites on AFV rely almost all on radar detection and targeting and destroy the relative slow incoming threats within a certain range band with light launchers which can rotated very quickly. A IFV turret is by a magnitude slower and thus only able to react against threats which allow for a longer reaction time.
An intercept efficiency of 86%, not bad. Or are you one of those that argues that if the system is not perfect it is worthless? Also, if it is the attack I think it was there were 21 rockets in the salvo, but they ignored the other 14 because they weren’t going near a populated area. Any practical system of this type needs between worthwhile targets and ones that can be ignored.Even Iron Dome, an extremely expensive system with long range warning was unable to intercept all 7 missiles fired allmost at the same time into a city in northern Israel with their expensive interceptors. An those rockets are bigger, softer and likely more slower targets then artillery shells. Every gun CIWS fires long bursts against the targets to increase the success probability. This does include the guns with heavier calibler and AHEAD like the following link shows.
Sounds like 6 round bursts to me.
A modern SPG section/half-battery of 4 guns can deliver with target information permitting with great accuracy within 10 sec. a burst of 3 shells each with can reach the area, range permitting through MRSI, at virtually the same time +/- 1 sec.
With bomblets they are able to saturate the area with almost 1000 submunitions. Not to talk about rocket artillery. Both can scoot away to a new FP. The effects of even simple conventional artillery shells are discussed in this link.