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    • Dubz

      Hello fellow modellers   02/04/2018

      We would like to present on our Facebook page more regularly pictures of your work. If you would like to participate, and we would appreciate that as we wanna promote the forum this way, please visit https://modelshipworld.com/index.php?/topic/17711-your-images-for-our-facebook-page/

    • kurtvd19

      An Incentive to Start A Build Log - New Plan Set from the NRG   03/17/2018

      An Incentive for Starting a Build Log

      The NRG’s Generic East Coast Oyster Sharpie plan sets have been selling out – we had to reorder prints 2X already.

      BUT nobody has started a build log yet.  As an incentive we have decided to reward the first three (3) MSW / NRG members who purchase the plans and start and continue* actual build logs** from the plans. 

      The build logs should be started in the scratch built forum and labeled with Generic Sharpie – by “your ID”.  When we have six or more build logs up and running we will set up a group build area for the Generic Sharpie build logs.

      The winners will be able to pick any one of the prizes listed below:

      Free registration for one day at 2018 or 2019 NRG Conference                  ($145 value)

      Shop Notes 1 and 2 set                                                                         ($60 value)

      Nautical Research Journal – all content set

      4 – CDs or 1 Flash Drive            ($150 value)

      Continental Galley Washington Plan set                                                    ($65 value)

      1 year NRG membership or extension                                                      ($50 - $62 value)

      THE RULES

       

      *“Continue” means that multiple posts containing build log content must be made for a minimum of 30 days after the initial post.  Logs will be tracked by starting date and the first 3 that have continued for 30 days following their initial post will be declared the winners.

      **Note the words “actual build logs” – no fair showing a few pieces of wood and going no further just to win. 

       

      The NRG has a new set of plans available for purchase with a free 200+ page full-color monograph .  Check the NAUTICAL RESEARCH GUILD NEWS forum below for details.  This plan set is developed for the first time scratch builder with limited tools and experience.  All materials are standard strip stock available from hobby wood suppliers.  However, it is also a great project for the more experienced builder looking for a smaller project to take a break from the bigger builds.  Remember MSW Members who provide us their real name are considered members for the discounted price.  An email or call to the office before you order with your real name and MSW user name before you order is needed for the discount code.

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BACKGROUND

 

I became interested in scanning half-hull models as an aside from my research on a particular ship, SS Meteor (1864).

I have a long-standing interest in the fast screw cruisers of the 1860s, including the Delano/Isherwood and Lenthall/Isherwood designs, and the privately-designed competitors: the USS Idaho by Steers/Dickerson, and Dennison Lawlor's SS Meteor. My interest also extends to British and French commerce-raiding and pursuit cruisers of that era: HMS Inconstant and related classes, and the four French-built Confederate raiders that became BAP América, BAP Unión, SMS Augusta, and SMS Victoria.  I recently obtained a scan of the HMS Inconstant plan from The National Maritime Museum.
The screw clipper Meteor (1864) was a smaller version of USS Idaho, but she had Scotish engines that delivered her promised speed. She was built by a Boston consortium to pursue Confederate commerce raiders, but was delivered too late for that purpose. The ship's trials showed her to be the fastest screw steamer in America, until the Navy tested its Isherwood-engined cruisers two years later. Despite attempts to use her in a commercial venture, the ship was really only suitable as a commerce raider, or for pursuing them.
 
RESULTS OF TESTING THE TWO GENERATIONS OF SENSE HAND-HELD SCANNERS
 
I have recently been successful in scanning a private half-hull of the USS Wampanoag, and the model of SS Meteor at the Portsmouth (NH) Athenaeum.  In late September I will scan the larger Meteor model at the Smithsonian Institution.  From these scans I will prepare traditional body, half-breadth, and sheer plans using SolidWorks.  Below are my recommendations for anyone seeking to use a Sense scanner to scan half-hull models.
 
TECH MEMO:
 
To Recap: For best results in scanning half-hulls, I have settled upon the generation 1 Sense3D scanner, paired with a Surface Pro 2 tablet (with the faster i5-4300U processor, and 4 to 8 GB RAM) running Windows 8.1. Both these devices can now only be obtained used or refurbished, and often the Pro 2 requires an operating system reset to Win8.1 from Win10.  However, the gen1 scanner has 3x3x3 meter capability and full user control of settings, vs. 2x2x2 meters and a too-friendly (impaired) interface with the generation 2 Sense2 scanner (retail: $360-400).  Out of the box, you can distinguish the two generations of scanner thus: The second generation "Sense2" has and "Intel inside" logo on the base label; the original (prefered) "Sense3D" does not.
 
The good news is that Cubify has become part of 3DSystems, and the formerly non-existent support for the Sense scanner has been replaced by exemplary 24-hour support. Software for both generations of Sense scanners (as well as the Apple variant) is found at:
Www.3dsystems.com/shop/support/sense/videos 
[Apple users -- note that at $80 the retail price for the scanner for your OS is roughly 20 percent the cost of the Windows scanner. Go figure...]
 
The older (gen1) scanner can be found for $200-350 on ebay -- usually in new condition, due to an initial frustration effect.  The Surface Pro 2 with 4300U quad processor has a nominal speed of 1.9 GHz, but ranges up to 2.6 or 2.9 GHz. That is plenty to drive the scanner, which the box says requires 2 GHz and 4 GB. 
 
I CANNOT RECOMMEND the 4200U SP2 (1.6 GHz and up), so shop carefully.  Expect to pay $300-350 for a 4300U SP2 on ebay (you may get a stylus included), or just go to Newegg and spend $330:
 
In either case, you will need a $35-50 Surface Pro 2 stylus, because the sensor software is MUCH easier to use with one. 
 
A mount to join the SP2 and scanner can be 3D-printed from the design at:
OR you can contact me for my redesign of that mount (as a print file, or an actual mount).
 
post-21829-0-09788300-1473380225_thumb.jpg
 
Edited by US-SteamNavy
mtaylor, donfarr, russ and 1 other like this

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post-21829-0-34103700-1473380290_thumb.jpg

 

To help the scanner maintain tracking when scanning a large smooth surface (a half-hull over three feet, for example), I distribute little traffic cones at 1- to 2-foot intervals around the target object.  If you lose tracking and imperfectly regain it, the active color image will show double cone tops -- you need to redo that scan.

Edited by US-SteamNavy
thibaultron, PeteB, russ and 4 others like this

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On 9/16/2016 at 6:01 AM, druxey said:

Would running the scanner along some sort of track/gantry near the object being scanned and parallel to its long axis improve tracking?

So sorry to take six months to get back to this, but I missed it while I was on my 70-day road tour of maritime museums and Civil war battlefields.  (Along the way I demonstrated the scanner set, in addition to Portsmouth (NH) Athenaeum, to model shops at Annapolis, the USN Carderock lab, the Smithsonian, Mystic Seaport, and Philadelphia's Independence Seaport Museum.  I also viewed the half-hull and model collections at those museums and at MIT.)

 

To answer your question, I tried mounting the scanner on a tripod dolly back in 2014 at Mare island Museum. It did not give better results than the handheld method.  However, I was generally not successful then because I was using an underpowered (slow chip) laptop to drive the scanner.  Since that time I have not tried a track or tripod, so you may very well be right!

 

Use of the half-hull scans for taking of lines is pending, while I try out various software for rotating them and registering them to and x-y-z coordinate system.  At this point, my recommendation for this pre-processing of the 3D scans is the freeware Meshmixer.  I will post more later, with examples.

mtaylor, thibaultron and dvm27 like this

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Thanks so much for your rather delayed reply! Look forward to your further experimental results. Hope it was a good trip for you.

thibaultron and mtaylor like this

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If you enjoy building ship models that are historically accurate as well as beautiful, then The Nautical Research Guild (NRG) is just right for you.

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