Yokosuka D4Y4 Model 43 "Suisei"

by   5,197 Mainblocks  10 days ago
Auto Credit Based on BogdanX's KAMIKAZE Challenge

Thanks for the featuring everyone ! Enjoy this plane. ;)

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  • The D4Y4 is like his predecessors a single-engined carrier based dive-bomber. The plane was operated by either a crew of two in tandem (Pilot, Navigator/Gunner) or single operated (RATO version).

  • The Model 43 is my submission for the Kamikaze challenge of BogdanX. Sadly due to my legendary speed i couldn't make the RATO version.

  • Be remind that the D4Y4 was NOT concieved as a Kamikaze plane, but the end of the war and desperate times brough us with this version.
    A lot of sources contradict each others but the various japaneses books are clear, it was adapted as a Kamikaze plane. And with the amout of field modification that the D4Y3 and Model 43 recieved its hard to keep track of it all.

  • So, to recapitulate the model 43 got improved survability by adding a 75mm Armored glass upfront and various armored plates around the crew compartiment as well as armored fuel tanks. Less speed, more bomb capacity and no defensive armement, the tail-hook was removed due to the Comet was used as a land-based operation.

  • As for the 601st paint scheme i didn't see any avidence that they have performed Kamikaze attack as the same intensity as the others specialized Tokko units. But i have a personal preference for this unit and a lot of pictures are related to them.

Current paint scheme : 601st Kokutai Dark Green 2 (AS-21) and Light Grey (AS-2).
Allied reporting name : Judy


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  • The D4Y4 Model 43 features are :

    • No.80 Ordinary Bomb (800kg) (Non-detachable)
    • Detailed landing gear.
    • Position lights.
    • Semi-realistic engine exhaust.
    • Custom controls surfaces (w/ Flaps and Air-brakes).

Notes :

  • The flaps got an issues during the construction phase and i couldn't fix them, so they are not deploying as intended.

  • Also, there were reports of Kamikaze attacks with more than the pilot, sometime the radio/gunner was with the "voluntary" pilot to his final mission.

  • The D4Y4 was intended to be used as a regular dive-bomber, that's why you can see some of them with twin 7.7 mg's and bomb-bays.

  • And last note, a RATO Booster pack of 3 can be outfitted to the D4Y4, that why you have late D4Y3 / D4Y4 with this "space" in the lower fuselage, but not only that, the RATO version needed to have a reinforced tail and sealed off gunner position.


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  • Controls groups :

    • CG.1 : (VTOL Down) Lowering the flaps.
    • CG.6 : (Toggle) Positions lights.
    • CG.7 : (VTOL Down) Lowering Air-brakes.
    • CG.8 : (VTOL Down + Toggle) Toggle rear wheel yaw mouvement.
    • CG. "G" : (Toggle) Toggle landings gears
    • CG. "F5" : (Switch) Switch to orbit view of the bomb.
    • CG. "F6" : (Switch) Switch to cockpit view

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  • Ground spawn :
    Set the flaps to chevron 2, taxi if needed, then full throttle, keep your elevator to the maximum until you are at 350km/h / 217mi/h. Then set your flaps chevron to 0.5. In the air, desactivate the yaw for the rear gear with CG:8.

  • Mid-air spawn :
    Full throttle, set your flaps to chevron 0.5 and set the gears up.

  • Kamikaze Attack :
    It is recommended to set your camera to F5 to watch your target burn and sinking. As for attacking the target, just use your plane and dive on it, from almost all angles.
    Be advised that the actual bomb is placed at the nose.


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  • Engine :
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  • Blueprints :
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    The D4Y4 in a side view.
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    The RATO version that i was talking about earlier.
  • Crews pictures :
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    Some of them are crews of D4Y2 and Model 33, but i found them interesting, Its nice to put faces on thoses pilots.
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    A simingly happy or cheering crew member.
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    A grounded D4Y4 of the 601st Kokutai.
  • 601st Kokutai's D4Y4 in flight :
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    Thoses cliches were taken around July 1945, some of them still retained theirs bomb-bay doors, field modifications are tricky to track.
    Also, you can see that some of theses plane have also a navigator.
  • After the war :
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    After the war a lot of D4Y's were left to mercy of mother nature in immense graveyards or on airfield, such a shame that today none survived. Today, only 3 restored exemplaries remain, 1 D4Y1, 1 D4Y2 and a refited D4Y1 was re-storeded to look like a D4Y3.
    One is possible to see at Yasakuni Shrine in Ichigaya, a beautifull plane, also the replica of the D4Y3 is at "The Planes of Fame Air Museum" at Chino California. Like i said its a converted D4Y1 into a D4Y3, that's why he got a tail-hook.
    For me, the D4Y2 is best looking dive-bomber period.
    But im sure that you guys already figured out that was in love with this plane. ^^
  • Note : Apologies, but i don't know how to read japanese so i can't give you the subtitles of thoses pictures. ^^

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  • Sources used :

    • Flight behaviour : War Thunder, IL-2 Sturmovik.
    • Shape, Details, and other important information :
      Famous Airplanes of the world n°69 : Navy Carrier Dive-bomber "Suisei" ,
      Maru Mechanism n°11 : "Suisei" / Type 99 Carrier Dive Bomber Combinedfleet.
      CherryBlossom article.

  • Plans and specs for BogdanX :

    • If you need links and more blueprints, pictures, ect, here is my email : Mainblock@outlook.fr

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The only spec i got right is the fuel amout ^^
Also, thoses are for the D4Y3, sadly i couldn't found one for the D4Y4, but its almost the same.


> Last words :
Im mainly building in eyesight and without making my planes perfeclty by the bleuprints, so as expected scale, shape and specs are not scaled to the real plane. But i try my best to have the plane mimic the general shape.
In any case, have fun with this build. :)

  • Finally, with this post and plane, i hope you guys will see that behind planes during a war, there is peoples, who whenever their side is, all suffered during thoses years. Its my little contribudition to not forget that.

Cheers,
Mainblocks "S'Aarum"

Spotlights

General Characteristics

  • Predecessor KAMIKAZE Challenge
  • This plane has been featured
  • Created On Windows
  • Wingspan 33.3ft (10.1m)
  • Length 31.5ft (9.6m)
  • Height 11.6ft (3.5m)
  • Empty Weight 12,567lbs (5,700kg)
  • Loaded Weight 14,951lbs (6,781kg)

Performance

  • Horse Power/Weight Ratio 0.143
  • Wing Loading 25.1lbs/ft2 (122.5kg/m2)
  • Wing Area 596.1ft2 (55.4m2)
  • Drag Points 7894

Parts

  • Number of Parts 1289
  • Control Surfaces 11
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  • Profile image
    5,197 Mainblocks

    @BogdanX I saw that ! I've enjoyed this contest. Looking forward for the next one.

    2 days ago
  • Profile image
    185k BogdanX

    @Mainblocks i posted the results

    +1 2 days ago
  • Profile image
    5,197 Mainblocks

    @BogdanX I see, thanks !

    2 days ago
  • Profile image
    185k BogdanX

    @Mainblocks when i have auto-roll, i usually fix with mirroring/drag edit.
    But if you have hidden main wings, you can angle one (X axis) by a small amount of degree. For example, EternalDarkness asked me to fix his plane with slight auto-roll.
    I just angled one wing with 0.15 on X axis. Well, you must search the perfect number until plane is level.
    It also had a YAW deviation.... i just angled his vertical stabilizer to 359.85 on Y axis. Took me some flight test to get that number.
    Also, if you have a heavy nose, you angle not one, but the pair of wings (main or tail) until it is fixed.

    +1 2 days ago
  • Profile image
    5,197 Mainblocks

    @BogdanX Hello BogdanX, thanks for your review.
    For visual, what do you mean look like wood ? ^^ (EDIT: got it)
    For construction, i'll take your review as a good starting point for next builds. Thanks a lot !
    For functionality, you nailed me. I usually do my plane as model planes at first, and flying planes second. And without Mostly fixing the flight performance on the original design, this plane shouldn't fly at all. ^^
    For accuraty, did you checked Combined fleet as well ? They got really good stats on it.
    And for the impression, thanks again for the review, you already helped me outmatch my old building technique and your tips made my two recent planes very appreciated and good looking. I'll take your advices seriously (especially for the functionality). And try to do my best for the next plane to fly this time. ^^

    Btw, what can i do with the angled wing thing ?

    2 days ago
  • Profile image
    185k BogdanX

    Visuals 9.5

    • Starting at 9 (a lot of custom visual details, logos, text, emblems, minor details, white belly)
    • Paint scheme is perfect, colors are just right +0.5
    • I really cannot find anything to complain about it +0.25
    • Oh wait, canopy is too flat, it looks like wood, you should have made it more glossy -0.25

    Construction 9.75

    • Starting at 9 (everything custom on this, wings, bomb, landing gear, canopy, white belly etc)
    • Graphic details are merging with fuselage perfectly +0.5
    • Sharp trailing edge +0.5
    • Engine exhaust design +0.5
    • No landing gear housing -0.25
    • Flaps construction +0.5
    • No visual trim-tabs -0.5
    • Cockpit view -0.5

    Functionality 6.25

    • Starting at 9
    • Massive nose drop -1
    • Pitching, trimming and flaps down massively roll the plane -1.5
    • Small auto-roll -0.5
    • No suspension on landing gear, landing is hard and bouncy -0.5
    • Roll, Pitching, YAW are plausible +0.5
    • Unequal landing gear retracting speed +0.25

    Accuracy 8.5

    • Starting at 6 for everybody
    • I used the specs from the article you linked (forum/thunderwar) and they are approximate you, -1m to length, 1.5 to wingspan, weight is 2 tons more, but i will add the bomb there, but still.... wing area is double. -0.5
    • Max speed is 100mph higher (it should be 342mph at 15,000ft) -0.5
    • Cockpit, wing shapes, landing gear, details match the real thing +1
    • Excellent blueprint match +2
    • 2 Boom 50 bombs is plausible (warhead and plane fuel) +0.5

    Impression 9

    • Fantastic description, a lot of photos, useful links +1.5
    • Good effort +1
    • Interesting design choice +1
    • Poor functionality, you focused too much on details and less on testing. A few angled wings could have fixed a lot of stuff -1
    • WW2 Japan vibe +0.5

    Score=43

    of 50

    +1 3 days ago
  • Profile image

    @Mainblocks de rien :)

    5 days ago
  • Profile image
    5,197 Mainblocks

    @Thefrenchdude22 Merci pour le spotlight !

    5 days ago
  • Profile image
    5,197 Mainblocks

    @BogdanX I think i see. I'll try to fix that, thanks for the intel.

    5 days ago
  • Profile image
    5,197 Mainblocks

    @typeZERO Actually its the first, but yes i love the D4Y models !

    5 days ago
  • Profile image
    2,939 typeZERO

    This is the 8th post about the Yokosuka D4Y4 that you did... You Love this plane so very much don't you comrade... :P :P :P :P :P :P :P :P :P
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    (By the way, I LOVE your profile Pic.... French Beauty at its Finest... :D )

    +1 6 days ago
  • Profile image
    185k BogdanX

    @Mainblocks both... when you set the trim for nose up/down function, you forgot to invert one. That function exists on same planes, to stabilize on some situations, like a heavy stick to left or right... or to balance the plane if there is more weight to one side

    +1 6 days ago
  • Profile image
    5,197 Mainblocks

    @BogdanX What do you mean ? That the error that occur with the trim is causing the auto-roll ? Or that its correcting it in your plane ?

    6 days ago
  • Profile image
    185k BogdanX

    @ChiChiWerx Trim is inverted on one side... something like an aileron trim function. Instead of pitching up/down, it auto-rolls. I will penalize it.
    Btw, F4u-Corsair has a feature like this, aileron tabs.

    In this case, this error can be used to eliminate the auto-roll :) And elevator trim can be done with flaps.

    6 days ago
  • Profile image
    10.6k kukimuki1234

    @Mainblocks Danke!

    7 days ago
  • Profile image
    5,197 Mainblocks

    @kukimuki1234 Just do that ![.] (imagelink) and for website links : [name] (link).
    Without the spaces between ofc.
    Markdown Formatting

    7 days ago
  • Profile image
    10.6k kukimuki1234

    It is a great plane,but even greater description!If i may know how you add pictures in description?

    +1 7 days ago
  • Profile image
    5,646 trolman

    This is awesome . Good job :)

    +1 7 days ago
  • Profile image
    5,197 Mainblocks

    @M4A4Firefly Thanks a lot for the upvote and the Spotlight ! Have fun with it !

    7 days ago
  • Profile image
    5,197 Mainblocks

    @Z3RO Thanks ! Appeciated. Any remarks about the plane and the description ?

    8 days ago
  • Profile image
    25.4k AdlerSteiner

    Ok thanks. @WNP78

    8 days ago
  • Profile image
    25.4k AdlerSteiner

    Np @Mainblocks

    8 days ago
  • Profile image
    24.0k Z3RO

    great work here and a very beautiful plane.

    +1 8 days ago
  • Profile image
    5,197 Mainblocks

    @ChiChiWerx Thanks a lot for the help my friend !
    @AdlerSteiner Thanks mate :)

    8 days ago
  • Profile image
    46.6k WNP78

    @AdlerSteiner did I? must have only said that once. If you can find a case that reliably reproduces it, I'd try and fix it.

    +1 8 days ago
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