Page 2 of 6 FirstFirst 1234 ... LastLast
Results 31 to 60 of 156

Thread: 12" scratch built cat

  1. #31
    Join Date
    Aug 2008
    Location
    CO
    Posts
    6,115

    Default

    Well here is the vid

    thanks to Jay Turner for doing the driving while I filmed the latter part.
    part one is me testing her out, then there is a nice close run and then the slo mo second half really gives a feel for how she handles!

    only thing left is a paint job!?!
    "Look good doin' it"
    See the fleet

  2. #32
    Join Date
    Oct 2007
    Location
    CA
    Posts
    1,302

    Default

    Nice work! Runs nice.

  3. #33
    Join Date
    Jun 2015
    Location
    CA
    Posts
    205

    Default

    Super cool Scratch Build here Jesse Right on man!!

  4. #34
    Join Date
    Aug 2008
    Location
    CO
    Posts
    6,115

    Default

    Thanks guys, 'preciate the enthusiasm! I'm almost done perfecting the finish for priming.
    It is amazing how well she scoots along.

    Anybody know who would be into helping me make a mold, and maybe get some reproduction going??
    "Look good doin' it"
    See the fleet

  5. #35
    Join Date
    Sep 2012
    Location
    Tg
    Posts
    1,035

    Default

    Just wondering how this might work if scaled up to 36"?
    NZMPBA 2013, 2016 Open Electric Champion. NZMPBA 2016 P Offshore Champion.
    2016 SUHA Q Sport Hydro Hi Points Champion.
    BOPMPBC Open Mono, Open Electric Champion.

  6. #36
    Join Date
    Jun 2013
    Location
    NV
    Posts
    179

    Default

    Nice vid! Took me about 4 seconds till I said " that's a cool Beck tune" Jeff Beck from 70s. Boat looks like it runs real well!
    41" & 29" FE Aeromarine Sprint Cats, Quickdraw powered "Dollar Eater" 41" Insane Cat, 29" BL mod Graupner Cat, 24" Hydro, 29" OB Cat, BL mod NQD Tear Into Jet boat, 55" Scarab, JET SWEEP R/C pool skimmer Rescue Boat.

  7. #37
    Join Date
    Aug 2008
    Location
    CO
    Posts
    6,115

    Default

    Quote Originally Posted by Peter A View Post
    Just wondering how this might work if scaled up to 36"?
    Funny you ask, I am 3/4 done with a 34" p class version. Tweaked the design some, reducing the slant on the sides a bit. Setting her up as twin or single for p limited or twin spec drive class. I'll do a build thread if there's interest.
    "Look good doin' it"
    See the fleet

  8. #38
    Join Date
    Aug 2008
    Location
    CO
    Posts
    6,115

    Default

    Quote Originally Posted by 78MaicoRider View Post
    Nice vid! Took me about 4 seconds till I said " that's a cool Beck tune" Jeff Beck from 70s. Boat looks like it runs real well!
    Thanks its fun lil guy. Been wanting to try in some bigger waves!
    "Look good doin' it"
    See the fleet

  9. #39
    Join Date
    Sep 2012
    Location
    Tg
    Posts
    1,035

    Default

    Quote Originally Posted by Jesse J View Post
    Funny you ask, I am 3/4 done with a 34" p class version. Tweaked the design some, reducing the slant on the sides a bit. Setting her up as twin or single for p limited or twin spec drive class. I'll do a build thread if there's interest.
    I'm thinking further into next year for a build. I don't have a cat and figure a Q setup as that would give me a boat to fit our Q offshore class here. guessing something in the 36-38" size but not too big as it would only be 1P.
    There is a 38" option available here, but a tad pricey.

    http://abmarine.co.nz/hulls/abm-boat-hulls

    I like scratch building so a plan to work from and I'd be away...
    NZMPBA 2013, 2016 Open Electric Champion. NZMPBA 2016 P Offshore Champion.
    2016 SUHA Q Sport Hydro Hi Points Champion.
    BOPMPBC Open Mono, Open Electric Champion.

  10. #40
    Join Date
    Aug 2008
    Location
    CO
    Posts
    6,115

    Default

    That is not a bad idea! It wouldn't take much to stretch the 34 into a 38"! Then it wouldn't look so wide...
    I will have some time over Christmas break... I'll see what I can do.

  11. #41
    Join Date
    Aug 2008
    Location
    CO
    Posts
    6,115

    Default

    Due to recent interest, I bring this back up.
    Working on getting a set of plans ready for laser cutter..
    "Look good doin' it"
    See the fleet

  12. #42
    Join Date
    Sep 2011
    Location
    Tx
    Posts
    159

    Default

    You building another one?
    Last edited by eric113; 01-24-2018 at 03:19 PM.

  13. #43
    Join Date
    Oct 2013
    Location
    la
    Posts
    8,722

    Default

    Your gonna have them cut?
    32" carbon rivercat single 4s 102mph, 27” mini Rivercat 92mph, kbb34 91mph, jessej micro cat(too fast) was

  14. #44
    Join Date
    Sep 2007
    Location
    CA
    Posts
    1,530

    Default

    Quote Originally Posted by Jesse J View Post
    Due to recent interest, I bring this back up.
    Working on getting a set of plans ready for laser cutter..
    If you're going to have the 12" cat parts laser-cut; let me know. I just might want a set. I was thinking of scaling it up to 15"~16" and have it laser-cut, but a 12-incher would be a heck of a lot of fun.
    A nation of sheep breeds a government of wolves

  15. #45
    Join Date
    Sep 2017
    Location
    MI
    Posts
    380

    Default

    I'm in for a set also if you have them laser cut. That is so cool! I love the first video with the dog! My dogs don't swim they just run back and forth in the yard barking at the boats in the canal.

  16. #46
    Join Date
    Aug 2008
    Location
    CO
    Posts
    6,115

    Default

    Ok, I'll see about working with Bill on getting some drawn up...
    "Look good doin' it"
    See the fleet

  17. #47
    Join Date
    Sep 2007
    Location
    CA
    Posts
    1,530

    Default

    Quote Originally Posted by Jesse J View Post
    Ok, I'll see about working with Bill on getting some drawn up...
    I've started some drawings for a 16" version for laser-cutting. There's actually a LOT of work that goes into the drawing; making certain everything lines up, fine-tuning some things that weren't laser-perfect in the original files, making allowances for the cutting kerf, and so on.

    Gotta finish the Atlas first though......

    This strut/rudder should just barely fit: https://www.ebay.com/itm/Rudder-with...19.m1438.l2649
    Attached Images Attached Images
    Last edited by Dr. Jet; 01-27-2018 at 05:24 PM. Reason: Add strut/rudder link
    A nation of sheep breeds a government of wolves

  18. #48
    Join Date
    Sep 2007
    Location
    CA
    Posts
    1,530

    Default

    Hmmmm..... Twin motors will fit in the 16" version.....
    Attached Images Attached Images
    A nation of sheep breeds a government of wolves

  19. #49
    Join Date
    Aug 2008
    Location
    CO
    Posts
    6,115

    Default

    Whew.. I not so keen on lil bitty motors in sponsons I can't git to...
    In my 34" version, ees ok. But in this lil guy... me not so shore.
    "Look good doin' it"
    See the fleet

  20. #50
    Join Date
    Sep 2007
    Location
    CA
    Posts
    1,530

    Default

    Quote Originally Posted by Jesse J View Post
    Whew.. I not so keen on lil bitty motors in sponsons I can't git to...
    In my 34" version, ees ok. But in this lil guy... me not so shore.
    It's not as bad as it seems. See my thread on the BBY Micro Scat Cat Twin. The BBY MSC is a HOOT and it hauls a$$!! Yeah, it's a b.....itch to get to the motor mounting screws, but I have a plan to make it easier to mount the motors in the laser-cut kit........
    A nation of sheep breeds a government of wolves

  21. #51
    Join Date
    Sep 2007
    Location
    CA
    Posts
    1,530

    Default

    I keep tinkering on the drawings and I keep seeing things that don't fit right... Whew!! I think Jesse had an issue where the sides transition to the transom. I think I have that solved, but every time I changed one thing, it affected three other things things.

    As for power, this one WILL NOT be a twin. I plan to use a long-can 3800 Kv helicopter outrunner in it. Easy access to all parts on this one.
    A nation of sheep breeds a government of wolves

  22. #52
    Join Date
    Aug 2008
    Location
    CO
    Posts
    6,115

    Default

    Quote Originally Posted by Dr. Jet View Post
    I keep tinkering on the drawings and I keep seeing things that don't fit right... Whew!! I think Jesse had an issue where the sides transition to the transom. I think I have that solved, but every time I changed one thing, it affected three other things things.

    As for power, this one WILL NOT be a twin. I plan to use a long-can 3800 Kv helicopter outrunner in it. Easy access to all parts on this one.
    Dang Bill! I drafted these plans up with the intention of printing, cutting out the parts, paper gluing them to the wood and cutting at the band saw... you are taking the precision to a whole new level.
    "Look good doin' it"
    See the fleet

  23. #53
    Join Date
    Sep 2007
    Location
    CA
    Posts
    1,530

    Default

    Quote Originally Posted by Jesse J View Post
    Dang Bill! ... you are taking the precision to a whole new level.
    I guess that's the engineer in me. I used to design roads and bridges (among other things). A hundredth of a foot off in one area could mean hundreds of thousands of dollars in another.

    I'm still debating on whether or not to laser cut the sides. It will make building the steps a whole lot easier, but the compound curves are beyond a bitch to work out. I think I have the math and geometry worked out and I've done some paper cut-outs to confirm my assumptions. My plan is to use 1/32 ply for the skins and the sides will wrap around to the transom. It would look something like the attached sketch, but I may have the angles of dangle WAY off.
    Attached Images Attached Images
    A nation of sheep breeds a government of wolves

  24. #54
    Join Date
    Sep 2007
    Location
    CA
    Posts
    1,530

    Default

    Problem solved! After watching the video of the 12" cat run, it seems that the steps in the hull that I copied from the larger version really aren't that necessary in the mini-sized one, so I simply eliminated them. In so doing, I'm going to leave it up to the builder to #1: Supply the skin material (1/32 ply), and #2: Cut all pieces to fit.
    A nation of sheep breeds a government of wolves

  25. #55
    Join Date
    Sep 2007
    Location
    CA
    Posts
    1,530

    Default

    Well, I think I have the plans done enough to cut a prototype. I made all the linework as polylines so I could offset them the required 0.002" to account for the cutting kerf. As you can see from the attached screenshots, there's a lot of tab and slot construction. This makes it easy to line everything up and keep everything square.

    This will have to wait until I'm done with the Atlas and the Casper, but the hard part is done now.
    Attached Images Attached Images
    A nation of sheep breeds a government of wolves

  26. #56
    Join Date
    Aug 2008
    Location
    CO
    Posts
    6,115

    Default

    Did you get the small 12" plans? There is no step in that one.
    Looks like you are making progress and adding a motor mount, nice touch.
    "Look good doin' it"
    See the fleet

  27. #57
    Join Date
    Sep 2007
    Location
    CA
    Posts
    1,530

    Default

    Quote Originally Posted by Jesse J View Post
    Did you get the small 12" plans? There is no step in that one.
    Looks like you are making progress and adding a motor mount, nice touch.
    I think you just sent the 24" plans. That's OK, it's real easy to cut the steps off. Now, I have to find an uber-cool way to make the strakes.
    A nation of sheep breeds a government of wolves

  28. #58
    Join Date
    Aug 2008
    Location
    CO
    Posts
    6,115

    Default

    For every one of these, I have added the strakes after skinning the bottom, and used trailing edge balsa... probably not in the Uber-cool category.
    Another way, likely still not in the UC club, make a vertical former that locks into the bulkheads at the outside of the strake, then add a flat strip between that and the inner former to make a ride pad?
    "Look good doin' it"
    See the fleet

  29. #59
    Join Date
    Sep 2007
    Location
    CA
    Posts
    1,530

    Default

    I have a table saw and I'm thinking I could use some hardwood and by making multiple passes with the blade vertical and angled, cut some strips that resemble really small aileron stock. The hardwood should result in really sharp edges. Next time I go to Home Depot, I'll check out what material they stock.
    A nation of sheep breeds a government of wolves

  30. #60
    Join Date
    Feb 2008
    Location
    GB
    Posts
    2,320

    Default

    Plastruct L section come in many sizes and works well for stakes.
    Paul "tug Killer" Upton-Taylor, Cat lover.
    FastElectricBoats.co.uk

Page 2 of 6 FirstFirst 1234 ... LastLast

Bookmarks

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •