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Kawanishi H11K Soku (1001st Sq. w/ Type 94 x3)

9,320 vcharng  1.6 years ago
Auto Credit Based on Mustang51's 1945-1950 Naval Aviation Challenge (Closed)

About the Aircraft:

The Kawanishi H11K "Soku" (Blue Sky) was a blueprint superheavy flying boat project designed in January 1944. It was projected to be completed by December 1945 and enter production in 1946. By the time the war ended, only a wooden full-scale model existed.

The design is basically a heavy transport aircraft (approximately 26 tons empty, 45 tons full load), with a split-open gate at the nose/bow for a ferry-like load/unload option. The plane is set to be build by wood in order to reduce weight. However, the technical difficulties of using wood delayed the development and it was given up when Japan surrendered.

The hull is designed to not rely on docks or harbours, but can instead be sailed directly ashore and use the bow entrance to load and unload its cargo. In this aircraft, I loaded it with 3 Type 94 Trucks (from the IJA/IJN Marine arsenal). Historically the Type 94 6x4 trucks would be a little bit too high for the cabin to carry, but this can be easily solved by removing the canvas supports.

^ Type 94 Truck on the left, along with the 16th Tank Regiment's Type 95 Ha-Go tanks. Photoed on Marcus Island.

About the 1001st Squadron: (Yes it did exist in history)

The 1001st squadron was the primary transport squadron of the IJNAF, it belongs to the 101st Aviation Fleet. Historically they operated aircrafts like the Type 100 Transport aircraft, H8K "Emily" Type 2 flying boat and other transport aircrafts.
This particular aircraft bears the number 1 aircraft pennant.

Controls:
AG1: Bow gate; releases Truck #1 after 5 seconds; unlocks landing ramp.
AG2: Fowler flap extend; unlocks flap angle
AG3: Fowler flap down.
AG4: Left engine throttle control engage (not that Zero On Deactivate is off, so if you turn off this AG the engine will be stuck at the current power setting)
AG5: Right engine throttle control engage
AG6: Truck #2 release and control on
AG7: Truck #3 release and control on
AG8: Truck #1 control on (since this is default at ON I can't let it release the truck.

VTOL: propeller pitch/ truck throttle. The max RPM is 3000 so make sure you don't destroy your engines.
Trim: Landing ramp position. It will zero on deactivating AG1 (the gate) so don't worry about forgetting to retract it.

Camera 1: Truck #1 orbit
Camera 2: Truck #2 orbit
Camera 3: Truck #3 orbit
Camera 4: cargo bay internal view


^Fowler flap in "extended" position

^Fowler flap in "down" position

the plane flies faster than history but it can't be helped. if I don't increase the power it won't be able to take off in SP's water physics.

Always takeoff and land with full flaps, and do not touchdown at above 210 km/h (130 mph)
do not sail above 100 km/h (60mph) when not intending to take off.
Do not exceed 50 degrees climb angle, this could cause the plane to go into deep, unrecoverable stall.

When taking off, after lifting to like 9m (27-30 feet) altitude, return your elevator to center slowly. this would let the tail generate less drag from water and allow the plane to actually take off.

Spotlights

General Characteristics

  • Predecessor 1945-1950 Naval Aviation Challenge (Closed)
  • Created On Windows
  • Wingspan 161.4ft (49.2m)
  • Length 137.7ft (42.0m)
  • Height 40.1ft (12.2m)
  • Empty Weight 85,926lbs (38,975kg)
  • Loaded Weight 104,523lbs (47,411kg)

Performance

  • Horse Power/Weight Ratio 0.076
  • Wing Loading 43.5lbs/ft2 (212.4kg/m2)
  • Wing Area 2,402.4ft2 (223.2m2)
  • Drag Points 24141

Parts

  • Number of Parts 457
  • Control Surfaces 5
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  • Profile image
    24.6k Mustang51

    Here are the results for your entry!
    Design: 13/20
    Functionality: 10/10
    Performance: 13/15
    Build quality: 10/15
    Paint scheme: 3/5
    Personal opinion 5/5
    Overall: 54/70 (5 upvotes!)

    1.5 years ago
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    10.4k Trijetz

    MMMM so you wanna make a naval flying boat. I got you....

    1.6 years ago
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    9,320 vcharng

    @Zanedavid Yes I would guess so as well. Some sources claim that KX-03 would be nicknamed "Choukai Yama" which is against all naming regulations in the IJN.

    1.6 years ago
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    9,269 Zanedavid

    Ah I’m assuming the KX-03 might have been some allied rumor which eventually led to it becoming a fully fledged drawing from some random dude lol @vcharng

    1.6 years ago
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    9,320 vcharng

    @Zanedavid I can't find japanese data about the KX-03, there are even some Japanese blog posts stating that they only heard about the KX-03 from non-Japanese sources.

    The H11K, on the other hand, at least had a wooden full size model.
    https://www.militaryfactory.com/aircraft/detail.asp?aircraft_id=1614
    (this site doesn't allow me to link its picture, otherwise I would have put it in the description)

    1.6 years ago
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    9,269 Zanedavid

    It was the Kawanishi KX-03, idk if Japan was really thinking on this one.

    1.6 years ago
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    9,269 Zanedavid

    I forget but there’s this one design where they had to of got really drunk and thought like 10 turbo props would suffice for a behemoth of a plane, ide say double this things size, looked like this. Besides that, nice work!

    1.6 years ago
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    43.8k Tang0five

    This is magnificent! Ambitious in scale and functionality too - handles like a big bird ought to bravo!

    1.6 years ago
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    1,862 jselbach

    So good!

    1.6 years ago
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    9,320 vcharng

    @ChiChiWerx Well I kept the pitch mostly because I don't have much choice, I need the throttles to be fully reversible so that I can reverse my way out of the beach once the landing operation is complete.

    I could've made a constant-speed propeller setup like my Ki-93, but that won't help much because the VTOL control is still occupied.

    I'm glad you like it anyway.

    1.6 years ago
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    27.9k ChiChiWerx

    Well researched, well thought out and well built. In reminds me of a real aircraft in that there are operating restrictions. It’s great you left the throttle and pitch controls intact, many builders don’t have the guts to do that as users tend to complain...but I really like the extra bit of challenge to spice things up, nice work!

    1.6 years ago
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    7,977 UraniumOxide

    Nice

    1.6 years ago
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    9,320 vcharng

    @TitanIncorporated
    @Bman01

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    @MrPorg137
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    1.6 years ago
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    @Strikefighter04
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    @thefalkenreich
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    9,320 vcharng

    @BlackBoA
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    1.6 years ago
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    24.6k Mustang51

    Very cool build. Thank you very much for this wonderful entry to the challenge

    1.6 years ago
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    22.8k NonameMini

    Lol I am early

    1.6 years ago