Kuparu
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Everything posted by Kuparu
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It has been a while since we last heard from you, Richard. I hope all is well and that Cyclone Alfred has not affected your progress or facilities. If all is well the weather offers an opportunity if your power has not been affected. At least you have a “ lifeboat” in the garage. I guess we are both waiting for the rain to stop, Kuparu
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- Union Steamship Company
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Just in case it has not been mentioned already, some of the controversy over anchors and other fittings might be resolved by referring to "The Tall Ships Pass" by WLA Derby (1937). Plenty of versions available through the usual on-line traders. The second half of the book is devoted to Herzogin Cecilie and her loss and has both plans and many photos. IMHO it is probably the best of the contemporary publications on that specific subject.
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Greetings NavyShooter, I am watching your build with interest and, if i may, a degree of caution. I built a 1:96 model of the same class of frigate some years ago, in fibreglass with a variety of suitable materials for fitting out above the main deck. She has two motors and shafts with scale 5-bladed props, a large battery pack and only three channels of r/c. Overall weight is about 3.15kg. I found that I had to take every measure possible to reduce the top-weight to get her into a stable condition and she is still a problem with rolling during the turns. The fitting out of the foremast took particular attention with weight minimisation. I look forward to seeing your tank test/maiden voyage next weekend. Good Luck, Kuparu.
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Greetings Jimlad, I apologise for being a little late in picking up a problem on the forecastle. On your museum model, apparently as it was originally built, the forecastle rails extend aft outboard of the sidelight screens until they arrive outboard of the lighthouse itself. In reality, such an arrangement would have partially obscured the lights and also caused problems with reflections. In fact, and as evidenced in the photos of the ship, the permanent rails come aft on both sides of the forecastle, then trend inboard to parallel the centreline to meet the lighthouse dead centre and also to provide the support structure for the screens. By doing so they ensure that the lights and screens provide the correct sector coverage without obstruction. I know it appears to be nitpicking but your efforts to ensure a very accurate model, correct for its time, would be marred by this error. Kuparu.
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Hi Keith, Based on the picture evidence that the lower surface is horizontal, the sides a vertical "pipe, and of part being unpainted and the face apparently a black compound (rubber or epoxy), I believe the aft fitting of the two is a depth sounder transducer. The fairing forward of it would appear to have been fitted to reduce turbulence or to avoid damage to the transducer, from cable/lines etc. Hard to estimate the size from the photos but I suspect that, if it is a transducer, it will be in the 200kHz range. Rod
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To the best of my knowledge, there were a couple of "sister" ships to Herzogin Cecilie which were Herzogin Sophie Charlotte, Viking and L'Avenir. If my memory serves correctly they were all set up as training ships but may not have been perfectly identical. The 'P' Line ships were neither sisters nor identical to the Herzogin's. Some had a central structure as well as forecastle and poop, which, in the case of Kruzenstern was extended later in life. One of the best sources of information about all of these ships is "Square Riggers, The Final Epoch" by Alex Hurst (Teredo Books, 1972). This book is the closest I have ever got to an encyclopaedia for the period. Things get confusing when it is necessary to take into account the name changes which took place through the history of the ships of that epoch. Good luck with the restoration: at least you don't have to reproduce that double counter aft which I found troublesome in several models.
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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
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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?
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- Union Steamship Company
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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.
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- Union Steamship Company
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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.
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- Union Steamship Company
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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.
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Hi Richard, Please confirm that your ballast tanks are/will be well baffled internally lest the free surface capsize your magnificent work. Regards Kuparu
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- Union Steamship Company
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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.
- 441 replies
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- Union Steamship Company
- Stepcraft 840
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