Register

If this is your first visit, please click the Sign Up now button to begin the process of creating your account so you can begin posting on our forums! The Sign Up process will only take up about a minute of two of your time.

Results 1 to 8 of 8

  1. #1

    Join Date
    Oct 2003
    Location
    prescott, AZ
    Posts
    8
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    Dumas Dauntless single brushless power system

    I built the Dumas Dauntless but wanted a simple single motor,propeller rudder system. With the new water cooled brushless outrunners now available, why mess with double everything? The motor is a Turnigy Aqua Star 3720-1500kw with a 50A water cooled ESC using 2 5000 mah 7.4v lipoly packs. I added 4 lbs of lead ballast just for stability in the center near the keel. The prop is a 42 mm two bladed high speed screw on a 4mm solid shaft. I fabricated the rudder from some 1/8" copper plate I had laying around. The boat is plenty fast and runs at a very realistic scale speed. I did have to double the keel where the prop shaft and rudder are mounted but are much stronger than the kit plan. If you want it to go faster, just go to 3 cell or 4 cell packs as the motor is capable of handling up to 15v for 890 watts of power but I wanted a scale speed and longer run times. I added an image of the boat with most of the detail work on it on a very windy day on a big lake. The hull handles the rough water very nicely.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	DSCF0001.JPG 
Views:	43 
Size:	75.1 KB 
ID:	2087265   Click image for larger version. 

Name:	DSCF0007.JPG 
Views:	31 
Size:	60.5 KB 
ID:	2087270   Click image for larger version. 

Name:	DSCF0008.JPG 
Views:	22 
Size:	96.5 KB 
ID:	2087271   Click image for larger version. 

Name:	DSCF0001.JPG 
Views:	19 
Size:	61.9 KB 
ID:	2087783   Click image for larger version. 

Name:	DSCF0002.JPG 
Views:	16 
Size:	65.3 KB 
ID:	2087784  

    Click image for larger version. 

Name:	DSCF0003.JPG 
Views:	16 
Size:	61.0 KB 
ID:	2087785   Click image for larger version. 

Name:	DSCF0007.JPG 
Views:	18 
Size:	65.1 KB 
ID:	2087786   Click image for larger version. 

Name:	DSCF0005.JPG 
Views:	20 
Size:	58.3 KB 
ID:	2087787   Click image for larger version. 

Name:	Miss B Haven 1B.JPG 
Views:	17 
Size:	823.6 KB 
ID:	2087808   Click image for larger version. 

Name:	Miss B Haven 1A.JPG 
Views:	21 
Size:	832.0 KB 
ID:	2087809  

    Click image for larger version. 

Name:	DSCF0006.JPG 
Views:	19 
Size:	90.5 KB 
ID:	2087560  
    Last edited by kc7til; 04-14-2015 at 06:38 AM. Reason: new images

  2. #2
    All Day Dan's Avatar
    Join Date
    Dec 2002
    Location
    MANHATTAN BEACH, CA
    Posts
    3,673
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback
    kc, nice set up. What kind of run times are you getting. Can those ESCs be programmed for reverse? How is it done? Dan.
    Dan

  3. #3

    Join Date
    Oct 2003
    Location
    prescott, AZ
    Posts
    8
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback
    Yes, the ESC is programmable with reverse. I have not yet run the batteries down yet but estimate 30-40 minutes depending on throttle settings. Of course, going to a 3 or 4 cell pack will give much more power and speed but you really don't need it. My idea was to give it a realistic scale speed, not crazy fast. I am working on a good video of the boat running along with all the finishing touches, IE spray bars, gunnels, hardware, windows ECT that were not installed when the image was taken. I did not build this boat as a scale model of the original Dauntless but something I would have had. By the way, the kit instructions are virtually non existant and the wood was terrible. Nice subject, lousy instructions and wood.

  4. #4
    All Day Dan's Avatar
    Join Date
    Dec 2002
    Location
    MANHATTAN BEACH, CA
    Posts
    3,673
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback
    Good information. Thank you for the reply. I'll be looking forward to seeing the video. Dan.
    Dan

  5. #5

    Join Date
    Nov 2004
    Location
    Marysville, WA
    Posts
    4,635
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback
    kc7til, have you read through the other Dauntless thread? There is a lot of good info about set ups, detailing and lots of other worth while information and pictures. As far as the Dumas kit, poor wood and instructions is par for the course. I've never had a Dumas kit with wood that was really that good. I've built three Dumas hydroplanes, two more waiting in the wings, and all had/have poor instructions. IF I were to build one, I'd relegate the mahogany framing to template use and build out of good quality birch plywood rather than struggle through with the cheap door skin.

  6. #6

    Join Date
    Oct 2003
    Location
    prescott, AZ
    Posts
    8
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback
    Yup, I agree. No, I have not read any threads on the Dauntless kit yet, but will, thanks for the tip. I really enjoy the design of the kit, but wish the instructions were there and better wood. The boat itself is a joy to run on the water. Will post some more images later of the finished boat and maybe a short video if I can figure out how to do it.

  7. #7

    Join Date
    Nov 2004
    Location
    Marysville, WA
    Posts
    4,635
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback
    If you haven't seen the other thread(all 100+ pages of it) here's the link:
    the unofficial home of the dumas dauntless

  8. #8

    Join Date
    Oct 2003
    Location
    prescott, AZ
    Posts
    8
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback
    Thanks. I did run the boat for 45 minutes yesterday under various throttle setting and used about 60% of the battery capacity ( two 5000 Mah 2C 7.4 V LiPoly's). I estimate the speed at 20 MPH actual which would be about 60 MPH scale or very close to the full size vessel at 50 knots.


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
All times are GMT -6. The time now is 06:07 AM.

SEO by vBSEO 3.6.1 ©2011, Crawlability, Inc.