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Thread: P offshore scratch cat build thread

  1. #31
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    Made some progress on the hatch:
    I sanded until happy with shape, 80, then 220 grit.
    Painted on thin layer of west systems, let dry then block sanded again with 220 to remove irregularities
    Laid on thick coat of west systems and the a 4" strip of heavy fiber glass along the scoop to the back, thick carbon fiber cloth for the wind screen, then light fg cloth along the sides.

    I still have some smoothing to do, but this is where I am this morning.
    The decking is 1/64" birch "ply" more like thick paper, I attached to the sealed balsa/basswood deck with contact cement and had to let cure for 72 long and painful hours. I will be staining that today...
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  2. #32
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    Either that’s a big ass boat or a little bitty dog lol!
    32" carbon rivercat single 4s 102mph, 27” mini Rivercat 92mph, kbb34 91mph, jessej micro cat(too fast) was

  3. #33
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    Looks awesome btw! I can’t lie, I’m jealous. Knowing how good that mini you made me runs, this thing is gonna do phenomenal. One day I’ll talk you into building me a hull!
    32" carbon rivercat single 4s 102mph, 27” mini Rivercat 92mph, kbb34 91mph, jessej micro cat(too fast) was

  4. #34
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    Looking great man

  5. #35
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    Thanks guys, that is our Great Dane ... trapped in a chihuahua body.
    Someday I'll build you one Travis. Let's make sure this one floats first!
    I had an idea on some cf ride pads. The top is almost done, now for the bottom.
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  6. #36
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    Got her painted, and ready for graphics.
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  7. #37
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    Looks great!
    Vac-U-Tug Jr (13mph)

  8. #38
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    The whole project has looked great, right from the start.
    I love watching scratch builds.

  9. #39
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    Cool

    Thanks Paul! ''Tis been a journey of "design as you go" philosophy.

    Well she is clear coated.. which means 99% done. Still a few tiny bits to finish up.
    Here is the current status as of this evening.
    All paints are Duplicolor and wood stain and sealer are Minwax.
    The pinstriping is recycled from the diy lettering website which was the 3m reflective white.
    I can give anymore details upon request.
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  10. #40
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    A big shout out to Travis (kfxguy) who gave me brutally honest feedback and talked me out of an ugly canopy paint job.
    I talked with my dad weekly and discussed triumphs and tribulations all the way through. He suggested the black pointy highlights on the foredeck. My wife had input all the way through and approved highly of the sparkly coat on the black, calling it "fancy"!

    The rear flap, which will get some sparkles too, will be liftable to access the transom and hopefully some super hidden hatch latches... still working with the design crew, mostly between 1-4am when we can get some work done.
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  11. #41
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    Default maiden voyage

    here is a short clip from my sunglasses.
    I couldn't have hoped for a more successful first run.

    The set up was good from the start - I made no adjustments.
    I have since trimmed off the lip I had made in the outside ride pad.. that did try to trip her up.
    movie
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  12. #42
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    That looks Ace man!
    There's a hole at the center of earth where the rest of the world sinks but i stand still...

  13. #43
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    Great job Jesse!
    .NAMBA20...Caterpillar UL-1, P-Spec OM29, P-Mono DF33, P-Spec JAE, Aussie 33" Hydro-LSH, Sprintcat CC2028 on 8s, PT SS45 Q Hydro, PS295 UL-1 power, OSE Brothers Outlaw QMono 4-sale, Rio 51z CC2028 on 8s

  14. #44
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    Man that thing I’ve awesome and impressive. I’ve told you before but I’ll tell you again, your the man!
    32" carbon rivercat single 4s 102mph, 27” mini Rivercat 92mph, kbb34 91mph, jessej micro cat(too fast) was

  15. #45
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    You should have posted the original paint design and got some feedback on it. The new design looks nothing short of awesome and I’m glad you received my humble criticism very well. You ended up with something that looks world class badass!
    32" carbon rivercat single 4s 102mph, 27” mini Rivercat 92mph, kbb34 91mph, jessej micro cat(too fast) was

  16. #46
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    Thanks guys, needless to say I was giggling all day!!
    I can't wait to get back out and test a little less aggressive outside edge on outside ride pad.
    Stay tuned and thanks again for the kind words!
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  17. #47
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    That is a great build!! Very cool!!

  18. #48
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    Jesse, unbelievable how well that thing ran first time out. You truly know what you're doing.
    Vac-U-Tug Jr (13mph)

  19. #49
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    Thanks again, I still have lots to learn and that's part of the fun.
    I am having a little trouble with the paint products; I probably mixed too many types too quickly.
    Minwax stain, two day cure time.
    Minwax fast dry sealer, one day cure.
    Duplicolor black, then Duplicolor metal flake 30 min cure
    Duplicolor clear coat, one day cure.

    Turns out the hatch tape damage was at the Minwax sealer level. I'm thinking either stain wasn't done drying, or the lacquer based automotive based paints messed with polyurethane wood sealer to break down the bond with the stained wood...
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  20. #50
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    Just saw the movie.
    Excellent results. Well done.

  21. #51
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    updates. since last weekend, I added some balsa to decrease the trip of the ride pads. I think I over-did it because she really slows down in the turns. no tripping, but slow turning... I will be removing some of the balsa to find a happy medium.
    here is video
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  22. #52
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    Certainly handles well Jesse. Makes me wanna take the R-42 out.
    I’ll have to re read this to catch the mods fully. So 6000mah for the twin?

  23. #53
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    Ya, 6000 total for several runs and after 2 minutes, there ware 15 and 25% ish for the outside and inside respectively.
    I have not tried 6s yet or any other escs than the original proboat ones from ten or so years ago.

    Here are the pics again. The lighter un sealed balsa between the ride pad and the spray rail is what I had added hoping to reduce the tendency of catching and "tripping".

    My next thing before this weekend is to chisel off a good amount and reduce it to about a 45 deg angle right at the ride pad. Should give me drier turns and better lap times with the good stability it gained.
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  24. #54
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    I wonder if that broad front balsa is catching too much water when it settles in before the corner(or as it receives rudder input).

  25. #55
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    ya me too. thats why I'm gonna remove that completely.
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  26. #56
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    Just posted vid over in videos. Turns out this handles great... but was built so beefy that 4s class requires twins.
    In video, she is running twin tp 3640, 1570Kv 5Y V2 motors, Ose Raider 150 escs, each with an extra cap bank between y connector and 4s pack, .078” wire drives, counter rotating CNC 48mm 3 blade, detongued and sharpened Total Pitch 2.65". The 2 packs are turnigy graphene 4000mah, 75c discharge. I do have two noise inhibitors between the escs and the y connector at the Spektrum receiver and a 2s lipo receiver pack. Until pictures, this is just about all the important details.

    Here is castle data logger. Tp 4060 3y 1734kv, 50mm x 1.8 pitch 3 blade prop on 4s2p... good thing I stoped when I did.
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    Last edited by Jesse J; 07-06-2019 at 09:55 AM. Reason: More deets
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  27. #57
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    Well thanks to some rough water, I did well at the nats.
    Three seconds and one first in the 4 heats, for second overall!
    I even finished the last quarter lap of the last heat on one motor! The inside mount broke loose and the motor twisted until it unplugged itself! Good thing I had two motors!
    I’ll post up some action shots soon.
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  28. #58
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    Great meeting you Jesse.. and racing with you.. sucks we couldn’t really open up the twins.. and honestly if you guys haven’t seen his build.. it works amazing..well done sir.. mad props Jesse

  29. #59
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    You too ray! It was an honor to get all three podium pics with you! Maybe next time I’ll be in the middle...
    Twin to win, eh brother?!?
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