Jump to content
MSW Spring Donation Drive

Kuparu

Members
 View Profile  See their activity

  • Posts

    7

  • Joined

  • Last visited

Recent Profile Visitors

The recent visitors block is disabled and is not being shown to other users.

  1.    mtaylor reacted to a post in a topic: HrMs O-13 by FreekS - 1:50 - RADIO - 1931-1940 - Last Dutch Sub “on eternal patrol”
  2.    Canute reacted to a post in a topic: HrMs O-13 by FreekS - 1:50 - RADIO - 1931-1940 - Last Dutch Sub “on eternal patrol”
  3. Kuparu
    Amazing and challenging model and a very bold method of making everything accessible. Can I suggest that you double check the direction your propellers will be rotating? It looks as though you have a port prop on the starboard shaft. I am looking forward to the completion. Rod
  4.    Kuparu reacted to a post in a topic: Wattle by Ikcdab - 1:24 - Steam Tug - my first scratchbuild
  5.    Kuparu reacted to a post in a topic: African Queen by gjdale (Grant) - Billing Boats (modified) - Scale 1:12 - RADIO - Live Steam
  6.    mtaylor reacted to a post in a topic: TEV Wahine 1965 by Richard Dunn - scale 1:35 - RADIO
  7. Kuparu
    Hi Richard, The thought of having to make so many rivets would scare me off. In the past I have found that steel dressmakers pins have a range of uses in modelling and I know they come in a variety of lengths and head diameters. Might be worth a look?
  8.    yvesvidal reacted to a post in a topic: TEV Wahine 1965 by Richard Dunn - scale 1:35 - RADIO
  9.    lmagna reacted to a post in a topic: TEV Wahine 1965 by Richard Dunn - scale 1:35 - RADIO
  10.    mtaylor reacted to a post in a topic: TEV Wahine 1965 by Richard Dunn - scale 1:35 - RADIO
  11. Kuparu
    In response to Roger Pellet's query: Wahine operated a regular service out of Wellington on the southern end of North Island, New Zealand. The entrance to the harbour is directly open to the south and very exposed. A southerly buster can raise massive swells which are made worse by the funnel shape of the entrance, making steering an inbound ship extremely difficult. I recommend reading accounts of the loss of the ship to get a real feel for the needs behind bow rudder and a thruster, other than for berthing assistance.
  12.    mtaylor reacted to a post in a topic: TEV Wahine 1965 by Richard Dunn - scale 1:35 - RADIO
  13. Kuparu
    In response to Imagna's suggestion I would wish to avoid contentious arguments in this forum but I must express doubts about his concept while fully agreeing that the tanks must have air vents capable of permitting air flow eqivalent to the rate the water is pumped in or out. I must cast doubts on the idea of a floating tank top however, unless Imagna has proven the concept in practice, since it cannot restrict the free surface if it is floating. A tank without baffles can only prevent free surface problems if pressed full or in such a state where "pocketing" occurs. Once you know the total displacement of your complete model you can work out the amount of ballast required to bring her down to her marks, and thus the volume of your tanks. Calculating the required contents for each tank to get the trim right will be "fun". Good luck, Kuparu.
  14.    lmagna reacted to a post in a topic: TEV Wahine 1965 by Richard Dunn - scale 1:35 - RADIO
  15.    mtaylor reacted to a post in a topic: TEV Wahine 1965 by Richard Dunn - scale 1:35 - RADIO
  16.    Ian_Grant reacted to a post in a topic: TEV Wahine 1965 by Richard Dunn - scale 1:35 - RADIO
  17. Kuparu
    I recommend some "expert" advice as I know water ballast has a few pitfalls. The only guidance I could give on ballast tanks is based on a failure which led to a significant amount of concrete slurry going into the tank for solid ballast. Looking on-line makes me think that the style and number of baffles used in aircraft internal wing fuel tanks might provide an example but I know there are some mathematics involved for ships. Regards, Kuparu.
  18. Kuparu
    Hi Richard, Please confirm that your ballast tanks are/will be well baffled internally lest the free surface capsize your magnificent work. Regards Kuparu
  19. Kuparu
    According to GF Campbell, the Aberdeen-built clipper Vision was built in 1854 of three layers of plank with the inner two layers diagonal in 2 inch larch. New Zealanders and visitors will be aware of the preserved ship Edwin Fox, which I believe was built of mahogany with inner planking diagonal. During WW2 many smaller warships were built using diagonal planking, including Fairmiles and HDML's. In the later case, planks were secured using galvanised steel bolts and there were layers of varnished muslin between the skins.

About us

Modelshipworld - Advancing Ship Modeling through Research

SSL Secured

Your security is important for us so this Website is SSL-Secured

NRG Mailing Address

Nautical Research Guild
237 South Lincoln Street
Westmont IL, 60559-1917

Model Ship World ® and the MSW logo are Registered Trademarks, and belong to the Nautical Research Guild (United States Patent and Trademark Office: No. 6,929,264 & No. 6,929,274, registered Dec. 20, 2022)

Helpful Links

About the NRG

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.

The Guild is a non-profit educational organization whose mission is to “Advance Ship Modeling Through Research”. We provide support to our members in their efforts to raise the quality of their model ships.

The Nautical Research Guild has published our world-renowned quarterly magazine, The Nautical Research Journal, since 1955. The pages of the Journal are full of articles by accomplished ship modelers who show you how they create those exquisite details on their models, and by maritime historians who show you the correct details to build. The Journal is available in both print and digital editions. Go to the NRG web site (www.thenrg.org) to download a complimentary digital copy of the Journal. The NRG also publishes plan sets, books and compilations of back issues of the Journal and the former Ships in Scale and Model Ship Builder magazines.

Our Emblem ®

Modelshipworld - Advancing Ship Modeling through Research

Nautical Research Guild ® and the NRG logo are Registered Trademarks, and belong to the Nautical Research Guild (United States Patent and Trademark Office: No. 6,999,236 & No. 6,999,237, registered March 14, 2023)

×
×
  • Create New...