login   |    register
Armor/AFV
For discussions on tanks, artillery, jeeps, etc.
KV-1/KV-1S Hybrid
MrNeil
Visit this Community
New Jersey, United States
Joined: November 01, 2005
KitMaker: 217 posts
Armorama: 213 posts
Posted: Tuesday, December 03, 2019 - 03:04 PM UTC

Quoted Text


Quoted Text

Now we come to the running gear.



You lost me here Neil. You say Trumpeter's KV-8S has the 33-68 wheel, but you don't mention that in the preceding text. Is that a typo for 33-65 or 33-67?

Also, in your photo of the three wheels, can you please list the part numbers of the wheels from left to right?

Thx,
KL



Well spotted, Kurt. I meant the 33-67 wheel but I fat-fingered it in my post

In the photo of the Parfino vehicle, you're looking at two 33-67 wheels left and center, and an 833-16 wheel on the right.
MrNeil
Visit this Community
New Jersey, United States
Joined: November 01, 2005
KitMaker: 217 posts
Armorama: 213 posts
Posted: Thursday, December 05, 2019 - 02:08 PM UTC
Next up, I fitted the turret roof, and added the weld bead around the edge in the usual manner.

The cupola lacks the very prominent weld bead around the circumference of its base, which can be seen in the photo below.



I added that weld bead too, followed by the vision devices and the loader's hatch with its torsion bar counterbalance device.

The grab handles on each side of the roof reach too far onto the roof itself compared to photos, so I filled the locating slots and built my own handles from 15-thou phosphor bronze wire.

The photo below shows the completed turret with the gun barrel and mantlet in place. The KV-1S kit provides a metal barrel but I used one from Aber since I had it on hand and it had a rifled muzzle where the Trumpeter barrel didn't.

MrNeil
Visit this Community
New Jersey, United States
Joined: November 01, 2005
KitMaker: 217 posts
Armorama: 213 posts
Posted: Friday, December 06, 2019 - 01:15 PM UTC
Now we come to the tracks. As I mentioned earlier in this thread, KV-1S vehicles built prior to the end of October 1942 were fitted with 608mm tracks, which looked like the tracks on the Parfino vehicle, shown in the photo below.



Note that the Parfino example has its tracks mounted backwards, relative to period photos of vehicles with this type of track.

Masterclub makes the 608mm tracks in white metal as MTL35030 KV-1s Early. Masterclub are my new favorite for individual link tracks. They are similar in quality to Friuls but have tiny resin pins instead of the wire that Friulmodel uses. In my opinion, this results in a much better appearance when viewed up close.

The photo below shows the model with its running gear test-fitted but not yet glued in place, to judge the correct number of links for the track. The track is also not joined up yet, which is why it's sagging a little beneath the sprocket.



In case you're wondering, I used 90 links for the left-hand track. The sag along the top run is only slight, and deliberately so. The TM for the KV-1S specifies that that sag between the return rollers should be no more than 50mm, which means the bottom of the lowest track link - not the guide tooth - should be a little above the center of the return rollers.
MrNeil
Visit this Community
New Jersey, United States
Joined: November 01, 2005
KitMaker: 217 posts
Armorama: 213 posts
Posted: Tuesday, December 10, 2019 - 02:37 PM UTC
I'm going to be taking another break from this project for a couple weeks, since I'm flying to Australia tomorrow for Christmas, and being on the other side of the planet from my workbench makes modeling a little difficult

See y'all in the New Year.

Neil
MrNeil
Visit this Community
New Jersey, United States
Joined: November 01, 2005
KitMaker: 217 posts
Armorama: 213 posts
Posted: Tuesday, January 07, 2020 - 10:36 AM UTC
Back from Australia, and having mostly stopped drooling on myself from the jetlag, I decided it's time to get back into this build.

Trumpeter's tow shackles are not the best point in their KV kits. At the very least, the bases of the retaining pins are typically out of round and need to be replaced. I've had a set of Aber brass ones (item R18) for a while, and I decided to use them.

Each shackle consists of three brass pieces - shackle, pin and collar - and the set includes a length of very thin copper wire to make the spring clips that retain the pins. The pins are pre-drilled to take the clips, but you have to bend the clips to shape and this requires patience and no small amount of cussing. The finished result is very nice though.

kunjuro
Visit this Community
Philippines
Joined: October 27, 2013
KitMaker: 420 posts
Armorama: 393 posts
Posted: Tuesday, January 07, 2020 - 12:29 PM UTC
Amazing work so far mate. I love how you're really bringing these Trumpeter kits to life with these improvements. I'm mostly an OOB builder, but it's great to see folks point how ways to improve existing kits. I'm planning to build one of the Trumpeter KVs in my stash so I'm really learning a lot through your blog. Keep em coming!
marcb
Visit this Community
Overijssel, Netherlands
Joined: March 25, 2006
KitMaker: 1,060 posts
Armorama: 1,047 posts
Posted: Tuesday, January 07, 2020 - 12:42 PM UTC
That looks really good.
MrNeil
Visit this Community
New Jersey, United States
Joined: November 01, 2005
KitMaker: 217 posts
Armorama: 213 posts
Posted: Wednesday, January 08, 2020 - 11:39 AM UTC
The front towing shackles were similar to the rear ones, but a little more involved since they have the tow cables attached.



I've never had much joy with Trumpeter's tow cables, so I used Eureka XXL's ER-3509 set for this build. The Eureka cables provide a heavier gauge copper wire compared to the Trumpeter parts, and the resin ends are larger too. They fit nicely over the Aber shackles.

The rear ends of the stowed tow cables on KVs are secured with turnbuckles. The Trumpeter parts are molded integrally with their mounting brackets. Since I had already cut away the brackets, drilled them out and fitted them separately to the hull sides, I needed to modify the turnbuckles. I replaced the two ends with 15-thou phosphor bronze wire, bent to shape using the kit parts as a guide, retaining the central section of each turnbuckle.

MrNeil
Visit this Community
New Jersey, United States
Joined: November 01, 2005
KitMaker: 217 posts
Armorama: 213 posts
Posted: Wednesday, January 08, 2020 - 03:22 PM UTC

Quoted Text

Amazing work so far mate. I love how you're really bringing these Trumpeter kits to life with these improvements. I'm mostly an OOB builder, but it's great to see folks point how ways to improve existing kits. I'm planning to build one of the Trumpeter KVs in my stash so I'm really learning a lot through your blog. Keep em coming!



Nigel, Marc, and others...glad you're finding this build log useful.

The Trumpeter kits are, for the most part, very nice though like all kits, they provide room for improvement. This build was an unusual one since the prototype was a very uncommon vehicle and even the original Soviet builders in 1942 needed to do some oddball things, which require special modifications to the kits.
MrNeil
Visit this Community
New Jersey, United States
Joined: November 01, 2005
KitMaker: 217 posts
Armorama: 213 posts
Posted: Friday, January 10, 2020 - 10:10 AM UTC
Just a couple small details remained to be added before construction was complete.

All KVs had mud scrapers fitted to the lower hull sides immediately in front of the drive sprockets, to help reduce the buildup of mud and dirt between the sprocket rings, which could otherwise cause a thrown track.

I cleaned up the Trumpeter kit parts but didn't do anything much to them, since they're pretty decent and they'll be covered in crud anyway once the model is weathered.



Note that you can't fit them in place until after you fit the sprockets to the hull, or you won't be able to get the sprockets on.

The last items to add were the two machine guns - one on the front hull and the other on the rear of the turret. The Trumpeter parts aren't bad but I decided to use turned brass barrels from a Russian company named Magic Models. The barrels are supplied in two parts each and were a little fiddly to assemble, but look good once they're in place.



MrNeil
Visit this Community
New Jersey, United States
Joined: November 01, 2005
KitMaker: 217 posts
Armorama: 213 posts
Posted: Sunday, January 12, 2020 - 01:35 PM UTC
A Facebook friend has correctly pointed out that the commander's cupola has some serious issues. The base is the correct size but everything above it is significantly too small. That step around the circumference is simply wrong.

I'm in the process of rebuilding the upper portion of the cupola with styrene and putty. Stay tuned
MrNeil
Visit this Community
New Jersey, United States
Joined: November 01, 2005
KitMaker: 217 posts
Armorama: 213 posts
Posted: Friday, January 17, 2020 - 10:05 AM UTC
Every time I compared the Trumpeter kit's cupola with the Parfino vehicle, I found new discrepancies, so I decided to replace the entire cupola with a scratchbuilt one.

Here's a photo of the cupola on the Parfino vehicle, which is missing its original roof.



The first step was to cut a circle of 40-thou (1mm) styrene sheet, 20mm in diameter, to form the base. I added another circle of identical thickness, 17.5mm in diameter, on top of this.

On top of that, I added a ten-sided piece of styrene sheet that will act as a former to butt the vision blocks and cupola sides up against.



I then added the vertical plates visible either side of the vision blocks, using 30-thou (0.75mm) styrene. The shape is rather complex and this, combined with the tiny size of the pieces (5mm x 3mm overall) meant I had to go slowly and take a few breaks between pairs.



I'll post another update when I stop gibbering and sucking my thumb
KurtLaughlin
Visit this Community
Pennsylvania, United States
Joined: January 18, 2003
KitMaker: 2,259 posts
Armorama: 2,234 posts
Posted: Friday, January 17, 2020 - 12:31 PM UTC
I wondered about that roof - Sheet metal seems to be a bit light, overhead cover-wise. Did it have a fixed top or a hatch?

KL
MrNeil
Visit this Community
New Jersey, United States
Joined: November 01, 2005
KitMaker: 217 posts
Armorama: 213 posts
Posted: Friday, January 17, 2020 - 12:37 PM UTC

Quoted Text

I wondered about that roof - Sheet metal seems to be a bit light, overhead cover-wise. Did it have a fixed top or a hatch?

KL



The KV-1S cupola lacked a hatch. There were plans to fit a new cupola with a hatch, but that never made it to production. The commander had to wait until the KV-85 to get a hatch of his own.