Beyond The Sprues

Modelling => Completed GBs => Group and Themed Builds => Scandinavian GB => Topic started by: Dr. YoKai on August 16, 2024, 01:17:23 AM

Title: SAAB J-21...Anti-shipping/Anti-Kraken strike
Post by: Dr. YoKai on August 16, 2024, 01:17:23 AM
I am leaning toward a battlefield reccon fit, but we'll see what happens.
(https://live.staticflickr.com/65535/53924111307_230e3a372f_c.jpg) (https://flic.kr/p/2qa6aB2)DSCF1054 (https://flic.kr/p/2qa6aB2) by VileDr.Yo (https://www.flickr.com/photos/46965833@N07/), on Flickr

New Lab Cat Scruffy sez "oooh, spindley landing gear-can't wait to knock it offa da bench. Soon as I'm through nappin'"

(https://live.staticflickr.com/65535/53901598559_d094501e3c_c.jpg) (https://flic.kr/p/2q86Mmc)DSCF1051 (https://flic.kr/p/2q86Mmc) by VileDr.Yo (https://www.flickr.com/photos/46965833@N07/), on Flickr
Title: Re: SAAB J-21...something
Post by: Robomog on August 16, 2024, 06:06:14 AM
Ah !  I'm not the only suffering "feline intervention "  ;) ;D ;D

Mog
>^-.-^<
Title: Re: SAAB J-21...something
Post by: Frank3k on August 16, 2024, 06:36:02 AM
Is that the Heller kit?

Scruffy looks comfy....
Title: Re: SAAB J-21...something
Post by: Dr. YoKai on August 16, 2024, 09:27:37 PM
Is that the Heller kit?

Scruffy looks comfy....

 Yes, the venerable Heller... :D Still a very nice kit, all in all. I do want to pick up one of the Special Hobby 21R one day, but this'll do for now.
 Still leaning toward a Reccon platform, but I also want to look at what the Swedes were using air to surface anti-shipping missiles (if any)...
Title: Re: SAAB J-21...something
Post by: perttime on August 16, 2024, 11:10:20 PM
The experimental RB 302 would fit the time period for SAAB 21:
https://robotmuseum.se/robotar/rb-302/

Or RB 303 https://robotmuseum.se/robotar/rb-303-lufttorped/
Title: Re: SAAB J-21...something
Post by: Dr. YoKai on August 17, 2024, 12:16:12 AM
The experimental RB 302 would fit the time period for SAAB 21:
https://robotmuseum.se/robotar/rb-302/

Or RB 303 https://robotmuseum.se/robotar/rb-303-lufttorped/

 I had come across those a little earlier, but thanks for linking them in the post! I think I will go with something like the RB 302 or 303. I have some parts in the stash that should be just about perfect. The next question in one under the center line, or a pair underwing outboard of the booms?
Title: Re: SAAB J-21...something
Post by: perttime on August 17, 2024, 01:16:35 AM
Just guesstimating from missile specs and usual loadouts for SAAB 21 ... one under the centerline is enough.
Title: Re: SAAB J-21...something
Post by: apophenia on August 17, 2024, 05:21:11 AM
I had come across those a little earlier, but thanks for linking them in the post! I think I will go with something like the RB 302 or 303. I have some parts in the stash that should be just about perfect. The next question in one under the center line, or a pair underwing outboard of the booms?

Doc: I agree with perttime about the single, belly-mounted ASM. The challenge would come when the prop blades catch up with a mis-firing 'Robot'. So, perhaps backstory in a powerful ejector rack to ensure that the payload clears the spinning prop?

<pedant mode> Rb 302 and Rb 303 were projektnumret - all Rb 3xx designations being applied to experimental types. If these missiles were accepted for active service, Försvarsmakten would have changed their designations to Rb 02 and Rb 03. (Note that neither the RW Nord CT20 nor Northrop 'Humlan' targets had yet to enter service during your timeperiod ... so there would be no conflict over those Rb 02/Rb 03 designations.) </pedant mode>

Looking forward to this build (Scruffy willing)  :smiley: :smiley:
Title: Re: SAAB J-21...something
Post by: Dr. YoKai on August 17, 2024, 06:07:28 AM
 Much as I like overloaded attack aircraft, given the weight of even the Rb 302 (500 Kg, if I remember rightly) a single centerline mount would be the way to go. But after doing a little more scrolling, I found this: https://wiki.warthunder.com/Hprak_m/49 -which was carried in pairs on the outboard pylons.
Title: Re: SAAB J-21...something
Post by: apophenia on August 17, 2024, 08:40:22 AM
Cool! I'd never heard of the 18 cm hprak m/49 before  :smiley:
Title: Re: SAAB J-21...something
Post by: perttime on August 17, 2024, 12:22:09 PM
Looks like SAAB 21R could carry 5 of them on a mount that goes under the belly.
https://en.wikipedia.org/wiki/Saab_21R#Specifications_(Saab_21RA)
Title: Re: SAAB J-21...something
Post by: GTX_Admin on August 18, 2024, 01:20:49 AM
Speaking of rockets on a J-21:

(https://hastur.net/abbe/crimsonskies/events/flygmus/Urban3.jpg)(https://hastur.net/abbe/crimsonskies/events/flygmus/UrbanRSV.jpg)

And more on the 18 cm hprak m/49B:

(https://i-com.cdn.gaijin.net/monthly_2020_08/image.png.f373dc520b49534a2e3a9f6207bca7e6.png)(https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcSAOWlhaKdB8LKPMcZ2TNCTpMueD1PO60AAlw&s)
Title: Re: SAAB J-21...something
Post by: robunos on August 18, 2024, 01:57:56 AM
and speaking of rockets . . .


(https://i.postimg.cc/sfBphk4C/j21r-rockets.jpg) (https://postimages.org/)


cheers,
Robin.
Title: Re: SAAB J-21...something
Post by: Kerick on August 18, 2024, 03:25:41 AM
So this rocket was a real thing. I’m very suspicious of stuff from sites like warthunder.
Title: Re: SAAB J-21...something
Post by: apophenia on August 18, 2024, 10:28:13 AM
So this rocket was a real thing. I’m very suspicious of stuff from sites like warthunder.

Very wise. But, in this case, yeah ... a real thing.

According to the Swedish Wiki page on the Saab 21, Bofors developed a range of rockets to replace Flygvapnet's m/46s - their versions of the British 3-inch RPs. The largest of these Bofors rockets being the hprak m/49.

Halvpansarraket translates as 'anti-tank rocket' but, actually, the Flygvapnet intended them for use against naval targets.
Title: Re: SAAB J-21...something
Post by: perttime on August 18, 2024, 01:27:27 PM
...
Halvpansarraket translates as 'anti-tank rocket' but, actually, the Flygvapnet intended them for use against naval targets.

Or perhaps "semi-armour-piercing". Wikipedia articles on SAAB airplanes seem to define it as APHE: armour piercing high explosive.
Title: Re: SAAB J-21...something
Post by: apophenia on August 19, 2024, 04:07:15 AM
Or perhaps "semi-armour-piercing"...

Oh, of course ... halv - pansar ... that should have been obvious!  :-[
Title: Re: SAAB J-21...something
Post by: Dr. YoKai on August 27, 2024, 04:38:09 AM
Slowly forward-
Primered
(https://live.staticflickr.com/65535/53939180007_816590e4dd_z.jpg) (https://flic.kr/p/2qbqp1c)DSCF1058 (https://flic.kr/p/2qbqp1c) by VileDr.Yo (https://www.flickr.com/photos/46965833@N07/), on Flickr

And basic paint
(https://live.staticflickr.com/65535/53949144992_70f6805ab7_z.jpg) (https://flic.kr/p/2qcitfh)DSCF1064 (https://flic.kr/p/2qcitfh) by VileDr.Yo (https://www.flickr.com/photos/46965833@N07/), on Flickr
Title: Re: SAAB J-21...something
Post by: Claymore on August 27, 2024, 05:07:16 AM
Coming along nicely!  :smiley:
Title: Re: SAAB J-21...something
Post by: Buzzbomb on August 27, 2024, 06:43:35 AM
Nice Scheme... really hitting the zone
Title: Re: SAAB J-21...something
Post by: raafif on August 27, 2024, 08:28:09 AM
Guess I should've mentioned this earlier - twin tails would be nice  ;)

(https://th-thumbnailer.cdn-si-edu.com/ayg4w_BXdQZ6dpeeePNk-05MywQ=/fit-in/1072x0/https://tf-cmsv2-smithsonianmag-media.s3.amazonaws.com/filer/c2/5e/c25e4bef-5952-48ee-bf59-5924a05c068b/11f_dj2022_ugliestshowplane-_conroy-ac3q9573_live.jpg)
Title: Re: SAAB J-21...something
Post by: Frank3k on August 27, 2024, 11:27:09 AM
Nice job on the camo masking!
Title: Re: SAAB J-21...Anti-shipping strike
Post by: Dr. YoKai on August 27, 2024, 08:05:27 PM
 Thanks for the feedback and compliments everybody!

 The underwing rockets are going to be a larger version of the halv - pansar, one to a wing, and they should be done over the coming weekend. (I've got a pretty full week at work...could have sworn I was retired, but... ;) )  The camo is a bit anachronistic-I think the splinter pattern didn't start showing up in the Flygvapnet until sometime in the 60's or 70's, but I think it looks pretty good. I tried some thing a little different with the masking this time-the wing is just about the same width, (Chord--wise) as a strip of blue low tack masking tape, so I laid out a strip a bit more than the wingspan, traced the outline, and started laying out the angles with a sharpie, then went back and cut them apart with an x-acto blade. I am debating going back and adding a third color, (darker green) but I also have an impulse to quit while I'm ahead. :D. I am pleased overall, especially since the landing gear has held up to handling so well. I did snap the pitot tube off removing the masks yesterday, but I should be able to fix that...
Title: Re: SAAB J-21...something
Post by: Old Wombat on August 27, 2024, 09:17:38 PM
Ah, Swedish splinter scheme! Excellent! 8)
Title: Re: SAAB J-21...Anti-shipping/Anti-Kraken strike
Post by: perttime on August 27, 2024, 11:40:40 PM
...
 The underwing rockets are going to be a larger version of the halv - pansar, one to a wing, ...
Please remember to spell it "halvpansarraket", if you keep the Armour Piercing / High Explosive function  ;)
Title: Re: SAAB J-21...Anti-shipping/Anti-Kraken strike
Post by: Dr. YoKai on August 28, 2024, 08:51:35 AM
...
 The underwing rockets are going to be a larger version of the halv - pansar, one to a wing, ...
Please remember to spell it "halvpansarraket", if you keep the Armour Piercing / High Explosive function  ;)

Men självklart!  :smiley:
Title: Re: SAAB J-21...Anti-shipping/Anti-Kraken strike
Post by: Dr. YoKai on September 08, 2024, 04:16:21 AM
And pretty much finished. The canopy, which was in three pieces was...difficult. I had left it off during painting, and finished the framing with thin strips of decal paper. Not perfect, but better than my eyes and a brush could manage. There was a near-disaster with the decals-though they came off the sheet quite nicely considering their age, they were also very thin, and a couple of the roundels fractured around portions of the rims. I mixed up a bit of yellow paint, blended brush-tips of...brown I think? and managed a fair match. The pair of pansarskydd/antikraken raket* were cobbled together in about as whiffy a fashion as you could like. The bodies came from a pair of 1/144 missiles from an older Gundam kit (The F-50 Guntank kit from the Gundam F-91 series, circa 1991.),  with the fins from some ordnance from a Takara  1/100 scale F-100, also from an anime series. (Area 88) Finally since I had started this some kind of heavy anti-ship missile in mind, and the first thing I came across was the Rb 302, which had mid body wings (at least I think it did-searches that turned up pictures of it a few weeks ago come up empty today. ???) And those wings? Inner landing gear doors from an old Frog MC 202. (I have three of them, with the notion of turning the mess into the IMAM Ro. 67 tri-motor fighter one of these days...) Anyway, pictures-
(https://live.staticflickr.com/65535/53978473515_518c827a7d_z.jpg) (https://flic.kr/p/2qeTMAt)DSCF1067 (https://flic.kr/p/2qeTMAt) by VileDr.Yo (https://www.flickr.com/photos/46965833@N07/), on Flickr

(https://live.staticflickr.com/65535/53978043806_aa2c5b29cf_z.jpg) (https://flic.kr/p/2qeRzRG)DSCF1068 (https://flic.kr/p/2qeRzRG) by VileDr.Yo (https://www.flickr.com/photos/46965833@N07/), on Flickr

(https://live.staticflickr.com/65535/53978473490_8e2ebc13f6_z.jpg) (https://flic.kr/p/2qeTMA3)DSCF1071 (https://flic.kr/p/2qeTMA3) by VileDr.Yo (https://www.flickr.com/photos/46965833@N07/), on Flickr

(https://live.staticflickr.com/65535/53978284828_83a9c53366_z.jpg) (https://flic.kr/p/2qeSPvf)DSCF1074 (https://flic.kr/p/2qeSPvf) by VileDr.Yo (https://www.flickr.com/photos/46965833@N07/), on Flickr

Back story in a day or two.
Title: Re: SAAB J-21...Anti-shipping/Anti-Kraken strike
Post by: apophenia on September 08, 2024, 05:49:31 AM
Beautiful result, Doc!  :-*

... the first thing I came across was the Rb 302, which had mid body wings (at least I think it did-searches that turned up pictures of it a few weeks ago come up empty today...

Yes, the provrobot Rb 302 was mid-winged. As the attached photo from the Robotmuseum shows, the main missile body had a minature airplane layout. For its original ground-launched trials, to assist the launch catapult, the Rb 302 was fitted with a solid-rocket booster motor with cropped cruciform fins. Twin-endplate fins were used for ground launches, later replaced by a sleeker annular fin for air-launch.

The main thing about the Rb 302, though, was that it was purely a test vehicle. Rb 302 was a scale-model (in 1/125 1:1.25) for testing the aerodynamic shape and operational concept for the full-sized Rb 303 anti-shipping missile.

-- https://robotmuseum.se/robotar/rb-302/
Title: Re: SAAB J-21...Anti-shipping/Anti-Kraken strike
Post by: Buzzbomb on September 08, 2024, 07:10:11 AM
Most Excellent  :smiley:
Title: Re: SAAB J-21...Anti-shipping/Anti-Kraken strike
Post by: GTX_Admin on September 09, 2024, 12:58:56 AM
 :smiley:
Title: Re: SAAB J-21...Anti-shipping/Anti-Kraken strike
Post by: Robomog on September 09, 2024, 05:03:58 AM
Looking good! , love the camo  :smiley: :smiley:

Mog
>^-.-^<
Title: Re: SAAB J-21...Anti-shipping/Anti-Kraken strike
Post by: Old Wombat on September 09, 2024, 11:15:19 PM
The main thing about the Rb 302, though, was that it was purely a test vehicle. Rb 302 was a scale-model (in 1/125) for testing the aerodynamic shape and operational concept for the full-sized Rb 303 anti-shipping missile.

-- https://robotmuseum.se/robotar/rb-302/

(https://beyondthesprues.com/Forum/index.php?action=dlattach;topic=11229.0;attach=44749;image)

1/125? :icon_surprised:

How big was the Rb 303 meant to be? :-\

You could put a crew in & launch a Moon shot with it! :o


Oh, this is better! :D
Quote from: robotmuseum.se
For object 303, experimental robot 302 was produced in scale 1:1.25.
Title: Re: SAAB J-21...Anti-shipping/Anti-Kraken strike
Post by: apophenia on September 10, 2024, 02:08:57 AM
... How big was the Rb 303 meant to be? :-\ ...

Nailed!  :-[
Title: Re: SAAB J-21...Anti-shipping/Anti-Kraken strike
Post by: Frank3k on September 10, 2024, 10:12:21 AM
Fantastic job on the J-21 camo. The rockets look great, too; I love the cranked wings (or whatever they're called)
Title: Re: SAAB J-21...Anti-shipping/Anti-Kraken strike
Post by: Dr. YoKai on September 13, 2024, 12:52:17 AM
 Thanks for comments and compliments, colleagues!
 
 backstory: With the increasing tensions in Europe after the end of the Second World War, the Swedish High Command became concerned about Soviet Naval units closing off the Baltic with a combination of fast attack craft and the new Sverdlov cruisers. While budget restraints, especially during the period of Sweden's secret nuclear program, would inhibit sufficient funding for new warship construction, members of the Kustartilleriet  suggested that airpower could be something of an equalizer. Heavy guided anti-ship missiles were still a few years in the future, but with the rapid development of the J 29, the now-surplus J-21 and J-21r could be adapted as a stop gap anti-shipping force.
  In 1950, forty of the final production J-21A3 series were transferred to the island of Gotland, and began training pilots in surface attack techniques. While the threat of another European war remained in potential, another threat would emerge in the early nineteen fifties that was
horribly real: Kraken. Though the British Royal Navy would successfully counter the monsters in the North sea and North Atlantic, these by-products of Neu Atlantis-Nihon's horrible biological experiments* would decimate first the fishing industry in the Baltic, and as the creatures grew rapidly in size during the early 'fifties, larger commercial vessels as well. The successful development of the  pansarskydd/antikraken raket would prove vital to curbing the menace. The later J-21r was also adapted to the work, some fifty eventually being transferred to
the Kustartilleriet in 1953, where they would serve alongside their older siblings until the last Kraken was dispatched during its attack on Malmö in 1961. Below, and image of a pair of J-21r's attacking a Kraken off the city of Oxelösund in 1958.
(https://live.staticflickr.com/65535/53990413959_ab14817bb9_z.jpg) (https://flic.kr/p/2qfWZ5c)j21r-rockets (https://flic.kr/p/2qfWZ5c) by VileDr.Yo (https://www.flickr.com/photos/46965833@N07/), on Flickr

* See The Secret World War, 1947-1958: A report to the Supreme Allied Commander Europe by Clark Yo jr. (GPO 1965), and The Horrors I was Not Responsible for by Wen Yo. (University of the Southern Arctic Press, 1977)

many thanks again to all and in particular our fearless leader, Greg, for providing the image I so hideously modified for my own nefarious ends.
Title: Re: SAAB J-21...Anti-shipping/Anti-Kraken strike
Post by: Kerick on September 13, 2024, 08:53:11 AM
That's a really sharp build!
The Kraken Wars, something I will look into!
Title: Re: SAAB J-21...Anti-shipping/Anti-Kraken strike
Post by: Claymore on September 14, 2024, 03:28:56 PM
 Loving it!  ;D