WWII Scharnhorst (IRCWCC)

Discussion in 'Warship Builds' started by Kevin P., Oct 14, 2020.

  1. daisycutter

    daisycutter Active Member

    Joined:
    Nov 1, 2009
    Posts:
    130
  2. Kevin P.

    Kevin P. Well-Known Member

    Joined:
    Mar 29, 2015
    Posts:
    1,718
    Location:
    Chantilly, VA
    Printed up some tube bending guides. There was some hose kink issues to sort out
    D2FB7BF3-1BF9-4311-8F0A-F3BBE3B962A9.jpeg
    aluminum elbow
    0D0C843C-883F-4440-A96C-BE355448844B.jpeg
    Squeezed into the tube
    3701C516-20BD-4AAF-A168-4B02296AE7CB.jpeg
    looks like its working (port gun was issue)
    DCE1AF89-372A-43C2-804E-6C00933024D9.jpeg
    Making a new box because of need for another servo lead
    8C72D9C3-B548-4450-AC05-D853735A0140.jpeg
    decided to use triple xt30's for servo connections based on impact of loss of signal on the brushless ESCs. The fit is very tight so definitely need dielectric grease
    40592489-5D39-487C-92A3-AEF5A3044227.jpeg
     
    Last edited: Feb 14, 2021
    Beaver likes this.
  3. Caractacus Patt

    Caractacus Patt Member

    Joined:
    Jan 22, 2019
    Posts:
    70
    Location:
    Granite Falls, WA
    I've looked for triple-plug XT connectors, but have never found them - where did you get those?
     
  4. Kevin P.

    Kevin P. Well-Known Member

    Joined:
    Mar 29, 2015
    Posts:
    1,718
    Location:
    Chantilly, VA
  5. Kevin P.

    Kevin P. Well-Known Member

    Joined:
    Mar 29, 2015
    Posts:
    1,718
    Location:
    Chantilly, VA
    Box sealed up (marine 5200)
    AA3D9BFC-D625-4703-BB3B-A3A2A20A7E4B.jpeg
    sprayed deck and superstructure
    621B66C9-4BC0-4AF6-9EFE-D2B411CCF7B7.jpeg
    9DF26EF7-3061-423A-AB74-1635B4C5CC81.jpeg
     
    bsgkid117, Beaver and Boatmeister like this.
  6. Kevin P.

    Kevin P. Well-Known Member

    Joined:
    Mar 29, 2015
    Posts:
    1,718
    Location:
    Chantilly, VA
    Super in place, glue down tomorrow. Should probably add the secondaries before ballasting. Also maybe program ESC, power the boat up, and take first cut at transmitter settings, sheet Friday, co2 lines at some point, systems check and sea trails remaining
    E3BF88C8-9B16-4D30-876E-C6222FA984D8.jpeg
     
    jstod and Beaver like this.
  7. Kevin P.

    Kevin P. Well-Known Member

    Joined:
    Mar 29, 2015
    Posts:
    1,718
    Location:
    Chantilly, VA
    Gun barrels in, pulled out radio and centered rudder, other small things
    8A04CCC7-5B4A-4486-8D91-0FD1BAAE66BC.jpeg
    will use stack as float, printing spool tomorrow to go in the hole there, will fill stack with foam
    6B2FE274-7B49-4C89-8D91-2527793DA7E2.jpeg
     
  8. Kevin P.

    Kevin P. Well-Known Member

    Joined:
    Mar 29, 2015
    Posts:
    1,718
    Location:
    Chantilly, VA
    Knocked out ugly spool, hopefully should work
    7E448368-A9C1-48BC-96EC-C6F3E3FC4BD3.jpeg
    New box is done (need to cut off mounting tabs). programmed the pump ESC, also tested out the drive motors. Didn’t cook anything yet. The cracking point on the outboards was higher than I anticipated ( dead band), but I got them legal. It’ll be interesting to see how she behaves on the water. Also looking forward to testing hobbywing brushless ESC on drive in terms of reversal time vs hobbyking (still need to wire hobbywing up).

    B44FE0F8-F4E9-4BB3-AE9B-5FCBD6458CB0.jpeg
    Ready to start putting things in for real
     
  9. Kevin P.

    Kevin P. Well-Known Member

    Joined:
    Mar 29, 2015
    Posts:
    1,718
    Location:
    Chantilly, VA
    Did the duct tape thing. Overall it went well, but probably took 1.5 hours additional, so i think it will be awash from a time saving perspective, with small variation based on the specifics of the boat. For a long boat like that that i can't soak in the tub, the savings will probably be positive, for a smaller boat that could be soaked prior to removing sides, the savings would probably be negative. for a slab sided boat it probably would work well, this boat took longer due to stringer (2x windows to cut out)
    B2882FCA-735A-4186-9E99-26B5699BED33.jpeg
    documenting window depth
    858F2345-59C2-4277-8935-BA0D58689F38.jpeg
    51FC8DBA-A895-475E-95AD-626599F52182.jpeg
    CF977DAB-3A37-4649-8A21-D30489B5EDA6.jpeg
    sheeted
    F30E2F99-79C4-4622-82EE-21913EEAC568.jpeg
     
    Last edited: Feb 20, 2021
    vicious p and Beaver like this.
  10. Kevin P.

    Kevin P. Well-Known Member

    Joined:
    Mar 29, 2015
    Posts:
    1,718
    Location:
    Chantilly, VA
    Painted
    804A3063-C4D0-4836-8E04-570D7735F303.jpeg
    motor shield
    3B306CDD-28D3-43FC-81D8-C61E2B1705A4.jpeg
    Hole for wires and rib to sandwich the motor mount so it doesn’t pivot to touch the motor
    EEF4EF92-B33C-4D89-8A4C-3BAC12B83873.jpeg
    1D4CEBA3-1F92-41DF-BE0B-FD0AE6F7C754.jpeg
     
    Wmemlo and Anvil_x like this.
  11. wfirebaugh

    wfirebaugh Well-Known Member

    Joined:
    Aug 8, 2013
    Posts:
    518
    Location:
    El Paso Texas, USA
    I was wondering, What type of screening material did you use for the internal armor?
     
  12. Kevin P.

    Kevin P. Well-Known Member

    Joined:
    Mar 29, 2015
    Posts:
    1,718
    Location:
    Chantilly, VA
    Pet-resistant door screening
    Got wiring hooked up and co2 lines in
    Small things add up, 30 lbs with 2nd bottle. Bit heavier than I want so going to stick with one for now
    7CE558C2-47F6-4E15-B0D9-BAB16544903A.jpeg
    Balance
    120F20C0-9515-4A61-940B-EDADA6D31DF1.jpeg
    center of gravity within 1/4” of planned
    F544EA2B-83D0-4574-BB3F-9C7D2AAB72E9.jpeg
    Co2 lines much cleaner than wiring. Gun testing went well besides some co2 leaks that took a bit to correct. Hottest guns I’ve made to date. Grouping generally good but might have a burr in one of the barrels, I’ll have to check
    F44FF06B-8FC3-4C72-A7B0-5F66949F4553.jpeg
    Superstructure gooped down, secondaries made up
    C65CCB69-9DEB-417E-94D4-D3BDC27BDE79.jpeg
    blocks to align stack
    069E9A26-3691-4CC9-8353-72598CB7C0A2.jpeg
     

    Attached Files:

    Last edited: Feb 21, 2021
    wfirebaugh, Wmemlo and Beaver like this.
  13. Kevin P.

    Kevin P. Well-Known Member

    Joined:
    Mar 29, 2015
    Posts:
    1,718
    Location:
    Chantilly, VA
    Small things tonight. Gooped some wire holders to underside of deck rim, also showing aft superstructure mount since that piece spans two deck pieces
    4271C1B7-3511-481F-BB72-A8F695BC302B.jpeg
    grip is strong
    FA4404CF-18DC-4B61-82D7-B92F68297F72.jpeg
    Battery mounts (black things in bottom)
    133842EA-FC9C-46F9-81B1-78213D77B22F.jpeg
    barrel condoms and barrel pins
    8AFC29A2-570E-4A0F-A239-BE61D1FA11E8.jpeg
    73C25E3C-8CC3-4847-934B-12B363C41132.jpeg
    Wound about 15ft of braided fishing line around spool
    0342FA28-418D-4FB4-8509-800B129CAC52.jpeg
    let’s hope my float passes muster!
    I sprayed the secondaries, so will glue them on tomorrow. Otherwise it’s just wrapping the wire bundles and dielectric in the connectors I think.

    also tested out Courbet tonight, everything checked out. The monitor powered on too, it will be quite the odd ball fleet going to Georgia. Still have a solid evening of gathering things for the trip and packing the car. First event of the season always takes longer to gather things that migrated over winter
     
    bsgkid117 and jstod like this.
  14. Kevin P.

    Kevin P. Well-Known Member

    Joined:
    Mar 29, 2015
    Posts:
    1,718
    Location:
    Chantilly, VA
    Gluing the secondaries down, I’ll have to figure something else out for the aft ones since they would interfere with deck hold downs (plans never arrived haha).
    B1731EB8-FA49-4865-BD4F-AE5624CEFCC7.jpeg
    B514003D-AE62-40F1-BBC6-B553D4691C44.jpeg
    Will be putting the finishing touches on pond-side! Hope it works
     
    Nibbles1 and bsgkid117 like this.
  15. Kevin P.

    Kevin P. Well-Known Member

    Joined:
    Mar 29, 2015
    Posts:
    1,718
    Location:
    Chantilly, VA
    first battle in the books, great event in GA.


    awesome shot by @Beaver
    Scharnhorst sidemount shot.jpg
    Pre battle
    A0E2AC0B-34A9-4DCF-9CF2-CD9DE937800F.jpeg
    41C9CA7E-8FC8-4FDC-AFBB-AA0B2A1F66B7.jpeg
    she had some teething issues and will need some changes to internals

    Damage I contributed to
    577F81F3-A71D-4A8B-9318-0D53A94B8CAC.jpeg
    1215D2EE-A563-4809-B2A8-247FA9301704.jpeg

    damage received, tis just a flesh wound. She took 117-15-50ish like a champ
    6142833F-5C7F-49A4-BA31-A60A7E2880CD.jpeg
     
    Last edited: Feb 28, 2021
    jstod, Wmemlo, Panzer and 3 others like this.
  16. Commodore

    Commodore Well-Known Member

    Joined:
    Aug 8, 2013
    Posts:
    557
    Location:
    Sunny TX
    Looks splintery...
     
  17. Kevin P.

    Kevin P. Well-Known Member

    Joined:
    Mar 29, 2015
    Posts:
    1,718
    Location:
    Chantilly, VA
    Time to start the first post-battle-one refit

    Boat did ok for sea trials/battle one. Balance was a bit off so had to add weight to the bow, ended up running near max weight. Sidemounts were great, stern guns needed work - too much air flow for 1 reg, had to scale them back a bit. Boat spun after some adjustments, turns out I made rudders to the old rule size so I'll have to increase them to the current limit. outboard motors worked great, backed up straight. pump did well, might try out the 1350kV I have for a comparison to flow vs amps

    Measuring the new center of gravity with the trim weights for reference, about 1" off pre build estimate.
    A448E285-5407-4F68-8A87-4B114A0DCBC7.jpeg
    moving bottle to bow, batteries slightly forward. This will allow reducing weight by a bit.

    Box probably going away, it will leave space for the three ESCs directly forward of motors. Probably will just make a new wire harness
    7972EE97-251E-4425-AC54-B4B5DD271DAE.jpeg
    Once that's all sorted out, I'll have to work on the stern guns
     
    Last edited: Mar 11, 2021
    Wmemlo and Boatmeister like this.
  18. Wmemlo

    Wmemlo Member

    Joined:
    May 31, 2014
    Posts:
    81
    Location:
    Longview, tx
    You're making me more certain that my next project will be a refit of my rookie Scharnhorst!
     
  19. Kevin P.

    Kevin P. Well-Known Member

    Joined:
    Mar 29, 2015
    Posts:
    1,718
    Location:
    Chantilly, VA
    No one deserves the pain of a rookie Scharnhorst haha. I’m certainly happy with how she did in battle one, I feel like rumors of her sucky-ness were exaggerated. Should only look up once I check several things off my improvement list.

    anyways, got a little bit on time to work on wiring. Preserved the main harness with some minor mods (octopus for aux power leads). the three ESCs will sit much closer to motors, a lot fewer connections and wiring
    F6538787-AA6E-4B33-A58B-144780548205.jpeg
    need to wire up gun boards and pot
     
  20. Kevin P.

    Kevin P. Well-Known Member

    Joined:
    Mar 29, 2015
    Posts:
    1,718
    Location:
    Chantilly, VA
    Not much boat time recently, more time in last couple evenings

    found out why rudder servo stopped working
    267CC20F-DC0D-41F1-A78A-204D002A7462.jpeg
    30E1D436-02D2-41AF-9BAB-D4DCF17A70A8.jpeg
    Disappointing performance for a single event with no sinks. I used some old fashioned waterproofing on the replacement (with current products), conformal coating on the board then e6000 around all lower joints. Seemed like the weak point was the wire boot, so that had all surfaces hit with e6000.

    boards are wired up and tested, bricked the receiver and transferred settings

    got mounts in for new arrangement. Here’s a bottle mount that snaps onto the athwart ships battery I drew and printed tonight
    510CCFA3-E9B7-4E32-BF9F-EC34597F4B56.jpeg
    with bottle.
    83C4806F-F7F3-4459-800C-54D263D6D4B9.jpeg
    Without bottle
    DF883BBE-796F-41FB-95FB-890C2B85A893.jpeg
    overall new layout
    54E7EE67-2AD5-4718-AF6E-0D38E9D70207.jpeg
    Balance is much better, allowed removing a lot of trim weights. Total boat weight will be around 30.5 lbs.

    need to run new co2 lines. Planning to use the 3oz bottle for just the third triple. New rudders are in the works. Should have it at oakboro ina a couple weeks
     
    Boatmeister and Lou like this.