Inside the Chieftain's Hatch: Strv fm/31

[@jasonscott8844]

Welcome to the forgotten tank channel. I'm your host. Tank Jesus .

[@benholroyd5221]

He looks nothing like Jesus though. Ian off forgotten weapons (aka gun Jesus) on the other hand actually does.

[@benholroyd5221]

@Erick Konop presumably with an entourage of M7 priests, sextons, bishops, deacons, Vickers light tanks, and some 'church'ills for good measure?

[@borjesvensson8661]

Tank Patric

[@donkee011]

Judging by WG standards, those wheels are the most effective spaced armor in the universe.

[@KaptenN]

Considering that WG added wheeled vehicles I'm not waiting expectantly for them to add this tank.

[@Wolvenworks]

@@KaptenN but a tank that can go wheeled would be quite cool, no? granted this is a wheeled version of L-60, and that one sucks in-game...so a tier 2 prem

[@KaptenN]

@@Wolvenworks No, it's not a wheeled version of the L-60. I think it's the L-10. The L-60 is known as Strv m/38 (or m/39 or m/40 for upgraded versions) in the Swedish army. This tank is known as Strv fm/31 and is a wheeled version of the Strv m/31. From what I've read, only three m/31 were made and they didn't see service. It's a generation before m/38.

[@catarokujo5fuckmehelp]

​@@KaptenNit would still be a tier 2

[@mabinuqi03]

Chieftain: we haven't quiet figure this out. Sweden: we are not done building it yet.

[@henrikgiese6316]

The engineers responsible for this probably went on to design cars for SAAB, aka "next year's design today (you're the beta tester!)!". :-D

[@Mannhovf]

@@henrikgiese6316 Can confirm that the "old guard" at SAAB was absolute bonkers not just the designers and engineers but also the mechanics and test drivers. Did a 4 week internship at SAAB back in the 90's and what they did was the most crazy shit I've seen outside the army, some of the test mechanics even made Top Gear look normal and sane.

[@Feiora]

@@Mannhovf But SAAB cars are very durable... Maybe batshit crazy would help durability in other car makers?

[@edsonkidwell9813]

WELL ALL the cables Bell cranks etc. Can be made to function via hydraulics spool valves. Lots of things THAT could make this. Illustration TOOL for. Assembly workers. REFERENCE. Functioning wasn't EVER expected. It was a visual aid. THOSE pieces. Racked onto it. Where truck suspension parts etc. Volumetric containment. PRE shipping container days. LOL. EVER seen. Parts breakdowns before. Here's a. TRAINER. For NOOBS. How far out they where thinking scared shitless he'd get the BOMB FIRST. The CONCEPTS and spinoffs. Are. WELL with TECH what it is. LOL. TANKS lose to planes every time. Just saying. Bombs KILL tanks. LOL. Small. 10kgs

[@edsonkidwell9813]

Less actually

[@Vapefly0815]

Chieftain: "German vehicles are overly complicated." Sweden: "Hold my Surströmming!"

[@KaptenN]

The fellowship of the tanks. Germany: "Du hast mein Saurkraut!" Britain: "And my marmite." Sweden: "Och _min julmust!"_

[@KaptenN]

@Bad Cattitude Rotten shark is an Icelandic thing. Also, not all of Sweden has lutfisk or even surströmming. I've only seen lutfisk in stores once. Never tasted or smelled either.

[@DetStoraMisstaget]

@@KaptenN lutfisk smakar inte mycket men såsen är god. Surströmming borde klassas som kemiskt stridsmedel. Men smakar bättre än vad de luktar.

[@nehcrum]

@@DetStoraMisstaget For Surströmming, it's not actually the fish but rather the fermenting liquid that stinks. Clean the filets and the smell goes away.

[@DetStoraMisstaget]

@@nehcrum jo det är det. Fisken heter strömming. Efter bearbetning heter det surströmming. Jag vet hur man tillagar surströmming så din kommentar är helt irrelevant samt att du har fel.

[@wlewisiii]

I showed my son this video. He wants to be an engineer. The expression of near horror on his face was precious to behold. I then explained Christie's system to him and that made him feel better because at least it worked. Well, long as it's not too heavy and etc... :D

[@catt0215]

This did also work, there’s plenty of footage of it in working order in both configurations and switching between them. Though yes the absolute design horror of this is real 😂

[@Rafferty1968]

"We want a tank, and we want an armoured car." "Can't afford both." "How about one that is both?"

[@lillayoda4095]

Funny thing is that it was too expensive and the army decided to separate armored cars (Pansarbil) and tanks (Stridsvagn)

[@nehcrum]

@Bad Cattitude It's an armored vehicle, and you want tracks for terrain but wheels are far more fuel-effective and faster on roads. Tanks that travel long distances usually goes on some kind of transport due to fuel-costs and to avoid wear on tracks, suspension and engine. Which means you need two vehicles just for the tank, the tank itself and it's accompanying transport. So adding roadwheels to make it it's own transport for road travel makes a lot of sense. And of course tanks were a fairly new thing so they didn't know the thing then that we know now. You gotta experiment in order to learn what works and what doesn't.

[@KaptenN]

From what I've read, it could switch between tracks and wheels in 30 seconds while on the move, which was unique and incredibly fast compared to other wheel-come-track designs.

[@EnterpriseXI]

Even though some of these non-sponsored Wargaming videos of vehicles that will never be added to the game they are still extremely interesting on the history of the vehicle, and how it works. Keep up the good content Chieftain

[@genericpersonx333]

I always love it when people are confused to hear an engineering firm specializing in massive metal machines like locomotives and tanks has a carpentry team. Never occurs to them that you would want to make wooden copies of many metal components for testing or display purposes. Shows how little most people understand about how the stuff they use actually comes about, and partly why they don't appreciate manufacturing workers nearly as much as they should.

[@LordChesalot]

There skill and depth in most work

[@genericpersonx333]

@@LordChesalot Exactly, and it is a shame that most people never appreciate the depth and breadth of skills involved in making the everyday objects they take for granted.

[@nerd1000ify]

Let's not forget that woodworking skills were also critical for making the patterns used in making cast metal parts. Wooden patterns are still commonly used today.

[@micuu1]

2:07 I don't know, I think it looks more like a puma

[@thedon8219]

I understand that reference.

[@rapter229]

First thing I thought when he said that xD

[@TheChieftainsHatch]

What's the name of the Mexican lizard, eats all the goats?

[@anthony4331]

@@TheChieftainsHatch Chupacabra?

[@micuu1]

@@TheChieftainsHatch chupa... chupa-thingy?

[@brianreddeman951]

KZbin asked me to rate this video and describe why gave it 5 stars. Of the 6 choices available I chose "heart warming" and "calming." 😁

[@hobbesfan4196]

If any tank could use a collaboration with Bovington to reverse engineer or dismantle in order to comprehend the processes at play this would be it. Fascinating! Thank you Nick.

[@CMDRFandragon]

Sooo, is it a tracked armored car, or a wheeled tank?

[@maroman556]

Yes

[@deptusmechanikus7362]

Yes.

[@iczesmv]

Yes

[@timonsolus]

Definitely a wheeled tank IMO. Tracked armoured cars use removable tracks that fit over the road wheels to improve grip off road.

[@lukum55]

Yes

[@nonamesplease6288]

During the week it's a tank. On weekends you can load the kids, towels, rafts, and sandwiches, lower the wheels, and take it to the beach. The only thing missing is the BV.

[@andrewphillips8341]

"We think', "We cant figure it out". Who lost the manual? People, this is why you keep the manuals!

[@cmotdibbler4454]

I want to pull it apart to reverse engineer it, if there are no surviving documents for the vehicle reverse engineering may be the only way to see how it works. For instance the steering wheel looks like it has a tilt forward mechanism that disconnects it from the steering shaft (allows the rear driver to use the steering without the wheel causing a hazard for the front driver) I love historic prototype oddities where engineers are clearly looking for innovative solutions for problems and they are not afraid to think outside the box

[@mikebell8012]

@ Wasn't aware the Japanese did that, I know the Russians did.

[@caecium695]

@ What was the Japanese one called ?

[@ishiioutcasts]

I think my favourite instance of reverse engineering was the Vympel K-13 air to air missile, or, as the original version was known, the AIM-9 Sidewinder. During an engagement, an AIM-9 was fired at, and struck a MIG-17. The missile failed to go off, however, allowing it to be studied by Soviet engineers. The AIM-9 was replicated so precisely, and thoroughly, that when NATO forces were able to capture an intact K-13, They found that not only were the parts compatible, and completely interchangeable with an AIM-9, but they retained the same part number.

[@lobsterbark]

@ Have you ever actually tried to reverse engineer anything? It's way, way harder than you would think. Not impossible, but very difficult.

[@steelhammer96]

I hope there's a lot more stuff coming on with stefan and the chieftain, they're so great together!

[@lucisferre6361]

Interesting and informative, as always. Thanks!

[@tommyfred6180]

7:00 looks in cab. thinks wow this is going to be complicated. stops vid gose and gets cup of tea. restarts vid. let the nut scratching commence. :)

[@adamskinner5868]

More please ;). Surely there's enthusiastic and capable folks in Sweden (they build Viking ships from logs after all) that could embark on the adventure of restoring this unique vehicle, take out the engine and get it running while another team looks at the drive system. Sounds like the perfect winter project, something to do on those long winter evenings and it could all be documented through some cool doco that I'm sure would be popular on youtube. Perhaps Wargaming could fund it since they are no longer paying the Chieftain to fly around filming, exploring and explaining tanks.

[@justforever96]

What is any wooden ship built from except logs? asking for a friend. And a longship is a mere boat compared to a European sailing ship, or even brig, barque or frigate. Even a contemporary carrack or cog was a larger, more complex piece of engineering. Dont confuse _effective_ with difficult, complex or sophisticated.

[@adamskinner5868]

@@justforever96 Yea I do believe folks get wood from logs but I think there's so skill involved in turning a tree into the exact bits of timber you need for the different parts of a boat. I watched them build a few boats on youtube from log to finished product and I thought it was impressive but maybe I'm easily impressed. Certainly looked like highly skilled n hard work to me.

[@butchs.4239]

Seems like having someone Stephan's size along when crawling through WWII era tanks would give a better representation of their ergonomics. Nothing against Chieftain but he's a giant by comparison as illustrated at 15:02.

[@genericpersonx333]

Chieftain admits this frequently, but he brings one advantage: you can't always choose your tankers so any tank you can squeeze him into will only be better for the more typical tanker. Besides, history is full of massive men being told to squeeze into tanks in a hurry. I knew one rather large American volunteer for the Israeli Defense Force (around 6'0'' and 200 pounds) who found himself spending most of the Yom Kippur War crammed inside a captured T55. He appreciated not having to walk in the Sinai Desert, but he did his best to always be outside the vehicle as much as possible.

[@genericpersonx333]

​@Jimmy De'Souza Depends on where you live. I can say, as an American of Mid-Western stock, that 6' and 200 pounds is not uncommon around me, but to give you an idea of what the Israelis thought of Ira's 6'0'' and 200 pounds, his nickname was Jonah's Whale. He was at least a couple inches taller, often more, and 30-50 pounds over them. The Israelis weren't midgets, but they thought he was bigger than them

[@Ragedaonenlonely]

You have to remember people everywhere were shorter back then on average, tankers in particular. For the most part tank crew in Sweden had a limitation where if you were over 170cm you were put in the infantry to put it into perspective. Stefan (that's how you spell it and you don't really pronounce it stephan like Chieftain does, it's pronounced more like steef-an or steaf-an) is more the average size for a tanker. In fact, he literally is a retired tanker I believe.

[@KermitTheGamer21]

I did some research into the US M1917 tank, which was the first tank produced by the US. It had a height restriction of 5'4" and a weight restriction of 125lbs for each of its crew members.

[@Ragedaonenlonely]

Yup. Compared to tankers of the day the Chieftain is basically a giant and is easily at least a head taller than he's supposed to be for these tanks.

[@jeroylenkins1745]

Oh I love this one, the tracks and wheels in the 1930s were such a novel concept, great video.

[@davidspurlock3836]

Thank you Chief for another great video. 😊😊

[@1970DAH]

For non-Scandinavians, "stridsvogn" literally means "strife wagon". Personally, I like the Danish "kampvogn" which means "battle" or "match" wagon. Either way, I think they are way better than the English term "tank".

[@justforever96]

Looks like Swedish tracks were a major influence on the tracks on the Pz I, II, III and IV. Very similar, and the suspension looks much like the Pz I.

[@alexbarnes6877]

Loving the patented pokey thing!

[@radogost1536]

15:50 "tracked sistem that was CRAP" i laughed so hard...

[@MrCrystalcranium]

Really cool that so much of it's mechanical functioning is still undefined. It's like a treasure hunt!

[@SomeoneDK]

Well with the tracks being that bad... good thing it has wheels to drive away with lol

[@KaptenN]

If you run into the enemy and have to get away, you lock one track to do a quick 180 and run away. However, with the wheels down you can't really do that. That's why there's a backwards driver.

[@jon-paulfilkins7820]

If M.C. Escher had become a tank engineer, that is what you would get.

[@johnd2058]

More like Salvador Dali with that round thing at an odd angle like that.

[@knucklehead7456]

I like those Swedish car guys but every time you're around them they just sit around tellin SAAB stories 😂🤣😂🤣😂🤠

[@rjansen6874]

I see a new tier 8 premium tank :P

[@RasEli03]

More like tiet 2

[@Wolvenworks]

@@RasEli03 you missed the joke

[@RasEli03]

@@Wolvenworks I know

[@ovk-ih1zp]

"This is a Great Design, but it's NOT Complicated enough. Can you make it more Convoluted?" said NO ONE Ever. This looks like a decent design that someone just couldn't leave well enough alone.

[@ZETH_27]

They really need to add this to War Thunder. You could use the same for Hull Aiming and allow the fm/31 to deploy it's wheels while in combat since it was capable of doing so in real life.

[@wildonemeister]

11:20 - Suddenly the Chieftain throws us off the track so to speak by casually mentioning that it has a rear driver position. @le Chieftain - It's merchandise; not "merchanidse"; might want to correct that typo.

[@scorpionlxvi]

Looks a lot like the sdkfz 254 great story about the freedom tank needs to be told

[@AlexKall]

I want to see that film footage he talked about of this vehicle running, that would be really interesting.

[@YourRulerSkeletos]

I'm rather impressed that the switch from track to wheel power and steering is that simple to operate for the driver.

[@samrowland2816]

Find a woman who's as happy to see you as Nick is to see the Track Tensioning System

[@MONTANI12]

Nice video sir chieftain!!!

[@awells444]

The lighting in the tank makes anyone sitting in it look like they have been green screened into the hatch.

[@donaldrobertson117]

Bonkers complexity. But brilliant too. Let's see this approach on all MBT's going forward.

[@Felix-fu5bz]

Does this vehicle vully functional (driving) ? And whats with the L-10?

[@skogga]

Missing the rotor shaft for the helicopter blades and periscope for underwater operation.

[@edsonkidwell9813]

Modern tall style semi air bags. This could be KILLER. In low voltage light tank. Killer quiet. TANK. On air. Light weight tracks high speed

[@bor3549]

Reminds me vaguely about a towable double roller steamroller. They have a single set of wheels that can be lowered and the unit towed to a new site, rather than needing a trailer.

[@donaldraver]

Interesting concept I fully understand the thinking. You could deploy on wheels and retract the wheels for cross country it eliminates the need for transport truck or rail. I am impressed with the engineering

[@justforever96]

Oh and the term is 'traverse leaf spring', also used in Model T and Corvette.

[@RasEli03]

As a swed. I Think Stefan has a very... very stearotypical swedish accent

[@nathanstautzenberger8381]

I love the subtitles at the start "street swaggins"

[@dointh4198]

The first example of weird Stridsvagn hydraulics.

[@TerLoki]

"Rather curved horns... Tusks? Call it the Warthog?" Nah, chuppa-thingy.

[@timex513]

Puma?

[@myparceltape1169]

Looks like the attachment for the chain on the rescue vehicle.

[@Nipplator99999999999]

Until 20 minutes ago, I thought I could learn to drive anything with wheels. This franken-tank has completely crushed that complex,. After loss of my Superman complex in the Army, and now this one, what do I have left?

[@bigblue6917]

Looks like the cab of an old London Transport bus. Just check to see if they have one of those things for showing which route it's on.

[@fdmackey3666]

Sweet Moses!!! Clearly SOMEBODY did not subscribe to, or ever heard of, the principal of "Keep It Simple Stupid!".

[@lukedelport8231]

Any one else love how strange this tank is . Hey like for the tusks

[@dirkbonesteel]

Sudden urge to go sand and polish the treads on car tires. This could be the next up and coming mod..

[@edsonkidwell9813]

It would be interesting to revisit. Some of the ideas in this

[@jayffemt]

I wonder if the steering wheel/levers combo is similar to the older M113s having the control laterals and pivot steer brakes as separate controls.

[@jasonz7788]

Awesome thanks

[@AN-nt3uv]

The Swedish are known for innovative tanks and cars

[@micuu1]

Or in this case, both in one vehicle

[@lairdcummings9092]

Porque no los dos?

[@dingledooley9283]

80-90's Volvo's were pretty much tanks without tracks

[@knunyabeasewhacks8744]

They are more famously known for drinking while cooking, and throwing fish. Ersky dersky.

[@erikgranqvist3680]

If you think of Volvos, they have allways been up to date with the competition - a few years ago. The best they ever managed was with the current models, wish were OK compared to outgoing models from what they claim are their main competition (Mercedes, BMW, Audi - Volvo has said they compare to them for donkey years). In truth, they were not even up to scratch thru and thru with the current modeks, except for in Swedish car magazines. And the quality is a joke since around the new millenium, only getting worse as they put in new tech.

[@broccodoggo8363]

War Gaming: *Makes series to promote World of Tanks* War Thunder Fans: *crab rave*

[@lillayoda4095]

1.3 premium tank. Of course with bullshit APDS with too much post pen damage

[@KaptenN]

@@lillayoda4095 Are you saying that this tank is in WT? Can it switch between wheels and tracks?

[@lillayoda4095]

@@KaptenN No but it could be

[@Csp499]

"...The rather elaborate-looking, curved 'tusks'... call it the Warthog?" Nah, I'd say it's more like a puma.

[@shoootme]

What in Sams hell is a puma?

[@craighagenbruch3800]

in tanks were there was a steering instead of control leavers did the steering wheel have a limit on how far the drver could to avoid accidental track brakage?

[@chrissilsby4312]

Sir, if you could find a way to do one one the early German WW2 tank Version of this type or style? Thank you in advance, even if you can not or unable to.

[@VegasCyclingFreak]

What a complicated & bizarre beast

[@amerigo88]

Saw a manual for FM/31 at IKEA yesterday. Comes complete with elaborate drawings and instructions for this wheelacked fighting vehicle. There is a supplemental glacis armor kit available for an extra charge, but the instructions to attach it to the wooden glacis plate are also in the manual.

[@nicolasbleau2552]

IKEA might have the instruction manual for the tank.

[@michaelpettersson4919]

If it wasn't for thease crippeling export restriction there really should be an IKEA tank for armies on a budget. Shipped in boxes with included tools of course. And missing screws.

[@SheepInACart]

So obvious question, whats the advantage for long range transport over just loading the tank onto a train car or even a truck trailer? Even with the road wheels I can't imagine its low maintenance, easy on crew or good on fuel, and the truck probably only costs as much as the extra system, and can move a tank even when its broken (which frankly those road wheels easily can be when acting like a tank), or be busy with other logistics most of the time.

[@tssteelx]

I feel like ive seen this vechial before, only there was not talk of track tensioning, a mustache and a "they weren't vary good. But they built them anyways."

[@emilbt7588]

Hey Nicholas! Great vid! Ever Walked around an E4 M4A3 before?

[@doublemeasure]

This is bloody great! What is it? We don't know!

[@tonyromano6220]

This thing gave me a headache instantly.

[@kriztov265]

Im sure if we could get to sweden a group of fitters could strip the back down and and verify the different systems. Itd be a great holiday come exploring experience.

[@tankolad]

Nick, is the Chieftain still your favourite tank?

[@ajmanto4941]

Ohhhh... A convertable tank..😮😮

[@NotTheCIA1961]

Holy hell, was interested in getting a couple of the shirts from the Everpress shop, but that shipping cost is outrageous...

[@brucelee3388]

There was an even weirder track/wheel 'thing' made by IIRC Vickers that appears in a few old (1920's?) AFV demonstration field days. Looked like a gashapon toy. A single central track and one wheel each side, all on the ground at the same time - I can only guess that the sole crew member had to sit astride a metal box for the track to run inside of - and the single crew man stuck out the top beyond shoulder height like a 'Whack-a-Mole'.

[@cgokey5491]

you really should do a compilation of all your "tank is on fire" scenes

[@Wolvenworks]

this...looks interesting. i wonder if Minsk is interested in bringing it to WoT tho...

[@t4ketsuru]

sweden had foun out the secret of wheels armor surprised that they good at blocking shells, so hence decided to mount it on for additional armor

[@KaptenN]

And in the Strv 103 we put the fuel tanks on the unsloped sides of the tank to act as spaced armour.

[@carlwesternut2434]

Interesting design. I wouldn't mind going there to see the m/40 linx armoured reconnaissance vehicle

[@Alakazzam09]

This thing is really interesting. I'd imagine the wheels don't move too far down to make contact with the road but it would at least have to clear the tracks, what about tracks sagging and touching the road as you drive over hills and bumps? From the inside of the wheel view it looks like the drive is engaged by hubs that lock in place just like a 4x4 (manually or inside the vehicle I couldn't tell). How the hell does it turn on the wheels? There isn't much room between the wheels and the track to allow the wheel to turn much. I couldn't see any wear or damage on the inside of the wheel for evidence though. Braking one side would flat spot the tires, I suppose you could do that but it doesn't make much sense. Anyways, cool and complex. Thanks Chieftain and supporters!

[@whiskeytangosierra6]

Let me guess, the lead engineer for this nightmare next got a job working for Ferdinand Porsche in Germany?

[@Reddsoldier]

He turned up in 1941 and oversaw ALL tank development lol. After the war, he muddled around with soviet heavy tanks in the 40s and 50s and the. Finally moved to the US in the 60's.

[@terraflow__bryanburdo4547]

Where is the sauna installed?

[@HSMiyamoto]

Are those tires pneumatic or solid? If they are solid, 50 Kph on a 1930s road would be, uh, thrilling.

[@johnserrano9689]

What a legend....if you stop posting your videos man the world would physically stop spinning. Needless to say you must keep us well fed fine sir. Now get into the tiger 2 real good and deep, then we must see is3, then t10.

[@edward9674]

The swedish guy there is so nice.

[@justforever96]

I would assume that one of the levers must control the drive mode, and the tillers may simply have been left on the donor tank when they started tacking all the new bits all over it to create a prototype. That is assuming they know what they are talking about when they determined both do the same thing. I would have assumed the tillers control steering brake/clutches, and the steering wheel steers the front wheels in road mode. Seems like it ought to be easy enough to determine, really.

[@eyebite007]

"Call it a warthog"? Nah, looks more like a Puma to me

[@idrisddraig2]

Let MasterMilo crew play with it, probably 1/2 a day, it will be running and serviced to......might leave some skid marks in the parking ;)

[@jayfelsberg1931]

Aquavit may have had something toi with this contraption

[@Pijawek]

This is why you should pay attention to Ikea manuals.

[@PolakInHolland]

The turret from the front looks like a 7TP

[@MakeMeThinkAgain]

The Soviets probably would have tried to add wings.

[@radogost1536]

imagine a tank that can go on the roadwheels, tracks, fly, go amphibious and underwater...

[@MakeMeThinkAgain]

@@radogost1536 And is available for service 5 days a year.

[@hadrianbuiltawall9531]

As a totally non-tank expert, why not have the wheels permanently down? On ground suitable for wheels, they'd be in use but as soon as they sunk too far to work, the tracks would automatically be in contact with the ground.

[@lavrentivs9891]

Fiberoptics could help explore beneath the engine, without removing the whole thing.

[@pixellivesmatter8409]

Truly a weapon to surpass metal gear. Now only if they would've given it a roar function, it could've knocked out tanks with just pure intimidation.

[@sabre0smile]

This is so overcomplicated I fail to believe a German was not involved

[@FlexDB]

lol

[@fabiogalletti528]

yeah, that really seems way too over-engeneered to be german-free. :-)

[@hnorrstrom]

Ok Stefan is the most swedish ever saying probably and not sure all the time even if he is 99% sure. Just to not offend people, or end up in conflict, or try to be a pro. An american would have done the oposit.