WWII Scharnhorst (IRCWCC)

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

  1. daisycutter

    daisycutter Active Member

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  2. Kevin P.

    Kevin P. Well-Known Member

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    Printed up some tube bending guides. There was some hose kink issues to sort out
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    aluminum elbow
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    Squeezed into the tube
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    looks like its working (port gun was issue)
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    Making a new box because of need for another servo lead
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    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
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    Last edited: Feb 14, 2021
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  3. Caractacus Patt

    Caractacus Patt Member

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    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

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  5. Kevin P.

    Kevin P. Well-Known Member

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    Box sealed up (marine 5200)
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    sprayed deck and superstructure
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  6. Kevin P.

    Kevin P. Well-Known Member

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    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
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  7. Kevin P.

    Kevin P. Well-Known Member

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    Gun barrels in, pulled out radio and centered rudder, other small things
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    will use stack as float, printing spool tomorrow to go in the hole there, will fill stack with foam
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  8. Kevin P.

    Kevin P. Well-Known Member

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    Knocked out ugly spool, hopefully should work
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    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).

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    Ready to start putting things in for real
     
  9. Kevin P.

    Kevin P. Well-Known Member

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    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)
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    documenting window depth
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    sheeted
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    Last edited: Feb 20, 2021
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  10. Kevin P.

    Kevin P. Well-Known Member

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    Painted
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    motor shield
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    Hole for wires and rib to sandwich the motor mount so it doesn’t pivot to touch the motor
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  11. wfirebaugh

    wfirebaugh Well-Known Member

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    I was wondering, What type of screening material did you use for the internal armor?
     
  12. Kevin P.

    Kevin P. Well-Known Member

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    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
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    Balance
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    center of gravity within 1/4” of planned
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    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
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    Superstructure gooped down, secondaries made up
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    blocks to align stack
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    Last edited: Feb 21, 2021
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  13. Kevin P.

    Kevin P. Well-Known Member

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    Small things tonight. Gooped some wire holders to underside of deck rim, also showing aft superstructure mount since that piece spans two deck pieces
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    grip is strong
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    Battery mounts (black things in bottom)
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    barrel condoms and barrel pins
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    Wound about 15ft of braided fishing line around spool
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    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
     
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  14. Kevin P.

    Kevin P. Well-Known Member

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    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).
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    Will be putting the finishing touches on pond-side! Hope it works
     
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  15. Kevin P.

    Kevin P. Well-Known Member

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    first battle in the books, great event in GA.


    awesome shot by @Beaver
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    Pre battle
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    she had some teething issues and will need some changes to internals

    Damage I contributed to
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    damage received, tis just a flesh wound. She took 117-15-50ish like a champ
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    Last edited: Feb 28, 2021
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  16. Commodore

    Commodore Well-Known Member

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    Looks splintery...
     
  17. Kevin P.

    Kevin P. Well-Known Member

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    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.
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    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
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    Once that's all sorted out, I'll have to work on the stern guns
     
    Last edited: Mar 11, 2021
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  18. Wmemlo

    Wmemlo Member

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    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

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    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
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    need to wire up gun boards and pot
     
  20. Kevin P.

    Kevin P. Well-Known Member

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    Not much boat time recently, more time in last couple evenings

    found out why rudder servo stopped working
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    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
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    with bottle.
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    Without bottle
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    overall new layout
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    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
     
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