Search found 108 matches
- 05 Dec 2021, 08:55
- Forum: General IOM
- Topic: HULL MATERIALS....3D Printing. Croatian Motion.
- Replies: 101
- Views: 143795
Re: HULL MATERIALS....3D Printing. Croatian Motion.
As far as I know, the main problem with the proposal on the last AGM was a fact that motion has not been explained enough, etc. Therefore, GBR representative Graham Elliot started this thread to hear the opinion of the guys using 3D print. He, and many others, let us know that there is not much wron...
- 02 Feb 2021, 15:32
- Forum: General IOM
- Topic: HULL MATERIALS....3D Printing. Croatian Motion.
- Replies: 101
- Views: 143795
Re: HULL MATERIALS....3D Printing. Croatian Motion.
Hi Hiljoball, I am not starting the discussion all over and I don't see reached consensus to leave the current wording for non 3d printing hulld as it is now. You mentioned that the proposal "changes the philosophical structure of the Materials section in a very significant way – with possible ‘unex...
- 01 Feb 2021, 07:59
- Forum: General IOM
- Topic: HULL MATERIALS....3D Printing. Croatian Motion.
- Replies: 101
- Views: 143795
Re: HULL MATERIALS....3D Printing. Croatian Motion.
Hi Art, Could you please explain what has been changed for the non-3D printed boats in the CRO proposal except the proposed wording is changed in order to clearly allow all sorts of gel coats, resins with pigments and other additives as well as additives to thermoplastics which was not clear in the ...
- 24 Jan 2021, 13:30
- Forum: General IOM
- Topic: HULL MATERIALS....3D Printing. Croatian Motion.
- Replies: 101
- Views: 143795
Re: HULL MATERIALS....3D Printing. Croatian Motion.
Hi Graham, I am interested to know what is the outcome of the discussion here. A lot of a time and effort have been spent here, much information have been shared. CRO proposal is defeated on the last IOM ICA General Assembly, so what will be the next step? Just for note, any IOM 3D printed hull whic...
- 07 Dec 2020, 13:22
- Forum: General IOM
- Topic: HULL MATERIALS....3D Printing. Croatian Motion.
- Replies: 101
- Views: 143795
Re: HULL MATERIALS....3D Printing. Croatian Motion.
I would like to answer two questions asked by Robert: Hi Antonio, Thanks for providing details and photos! I don't know whether the proper wording for making products using "Elegoo printers" is "3D printing" or not :lol: However, construction techniques are unrestricted, some sort of resin is used ...
- 03 Dec 2020, 13:43
- Forum: General IOM
- Topic: HULL MATERIALS....3D Printing. Croatian Motion.
- Replies: 101
- Views: 143795
- 01 Dec 2020, 21:40
- Forum: General IOM
- Topic: HULL MATERIALS....3D Printing. Croatian Motion.
- Replies: 101
- Views: 143795
Re: HULL MATERIALS....3D Printing. Croatian Motion.
Hi all, I just received this photo from a friend of mine from one of the Facebook groups dealing with the 3D printing of radio sailing boats. Maybe some of them know the source. Sorry, I am not on Facebook :oops: https://photos.app.goo.gl/f8J9wECCrPzEacqr7 I am kindly ask the 3D printing guys to let...
- 01 Dec 2020, 21:07
- Forum: General IOM
- Topic: HULL MATERIALS....3D Printing. Croatian Motion.
- Replies: 101
- Views: 143795
Re: HULL MATERIALS....3D Printing. Croatian Motion.
Hi, Robert: "Regarding your item 1), I don't see how servo/winch trays or similar hull structural items with openings are not in compliance with current IOM Class Rules and CRO proposal. Opening for servo or winch is certainly not falling under "expanded, foamed, honeycombed" as stated in the curre...
- 28 Nov 2020, 09:15
- Forum: General IOM
- Topic: HULL MATERIALS....3D Printing. Croatian Motion.
- Replies: 101
- Views: 143795
Re: HULL MATERIALS....3D Printing. Croatian Motion.
it is prohibited to use foamed, expanded and honeycombed materials and to construct such features like honeycombed constructions Hi Robert Sure, that is the current situation, I don't think there was any doubt. My understanding is that we are discussing a future situation, where some rule changes m...
- 27 Nov 2020, 14:04
- Forum: General IOM
- Topic: HULL MATERIALS....3D Printing. Croatian Motion.
- Replies: 101
- Views: 143795
Re: HULL MATERIALS....3D Printing. Croatian Motion.
materials shall not be: expanded, foamed, honeycombed" Just to be a little academic (smile), this phrase must be understood to be talking about what the material *is*, not how it is processed. We are thinking that we ignore all matters about processing, that is, construction techniques, and we focu...
- 27 Nov 2020, 13:53
- Forum: General IOM
- Topic: HULL MATERIALS....3D Printing. Croatian Motion.
- Replies: 101
- Views: 143795
Re: HULL MATERIALS....3D Printing. Croatian Motion.
I strongly believe that we should not list any construction techniques. They are currently unrestricted and it should be like that. 3D print is just one of available additive manufacturing techniques. We [should] restrict materials Hi Robert Hmmm, restrict materials, de-restrict construction techni...
- 27 Nov 2020, 11:52
- Forum: General IOM
- Topic: HULL MATERIALS....3D Printing. Croatian Motion.
- Replies: 101
- Views: 143795
Re: HULL MATERIALS....3D Printing. Croatian Motion.
Hopefully in the following link you will see examples of non-hexagonal infill that cannot be included in the "honeycombed" definition above, as I pointed in a previous post, and are therefore allowed by the present Class Rules (but excluded by the recent interpretation issued?). https://photos.goog...
- 26 Nov 2020, 23:03
- Forum: General IOM
- Topic: HULL MATERIALS....3D Printing. Croatian Motion.
- Replies: 101
- Views: 143795
Re: HULL MATERIALS....3D Printing. Croatian Motion.
is the construction shown here (regardless of building technique used) honeycombed? For me, except for the 100% and 0% images, yes, all these are 'honeycombed'. Why such construction need to be permitted regardless of construction techniques used? Not entirely sure I understand your question. For m...
- 26 Nov 2020, 20:50
- Forum: General IOM
- Topic: HULL MATERIALS....3D Printing. Croatian Motion.
- Replies: 101
- Views: 143795
Re: HULL MATERIALS....3D Printing. Croatian Motion.
Hi Robert From the point of view of the rules we wish to make, I think we distinguish between solid materials, and materials with voids. Honeycombed, foamed, expanded, micro-ballooned, infill less than 100%, all these words and concepts refer to materials with voids or ways of creating materials wi...
- 26 Nov 2020, 19:16
- Forum: General IOM
- Topic: HULL MATERIALS....3D Printing. Croatian Motion.
- Replies: 101
- Views: 143795
Re: HULL MATERIALS....3D Printing. Croatian Motion.
I've completed a spreadsheet which calculates values of stiffness, strength, and weight to allow what-if comparisons of various materials in hull construction. I've updated the document to explain it, give some sample calculations, and suggest some conclusions. I repeat these here: Permitting honey...
- 26 Nov 2020, 17:10
- Forum: General IOM
- Topic: HULL MATERIALS....3D Printing. Croatian Motion.
- Replies: 101
- Views: 143795
Re: HULL MATERIALS....3D Printing. Croatian Motion.
HI Robert, Thanks for the reference to the rule change, however, it is still not an issue, as gel coat is a type of resin (permitted) and resin may be coloured. The other references such as use of fillers still apply. John Hi John, This is one of Q&A which is questionable: ------------------ Questi...
- 26 Nov 2020, 15:48
- Forum: General IOM
- Topic: HULL MATERIALS....3D Printing. Croatian Motion.
- Replies: 101
- Views: 143795
Re: HULL MATERIALS....3D Printing. Croatian Motion.
Thank you, Robert, noted. I understand though that out of this discussion glass infilled thermoplastics may be allowed, and that is part of this debate. In that sense, I would like to point that 3d printing with UV photoactivated resins, the growing new 3d printing technology (for instance with Ele...
- 25 Nov 2020, 21:48
- Forum: General IOM
- Topic: HULL MATERIALS....3D Printing. Croatian Motion.
- Replies: 101
- Views: 143795
Re: HULL MATERIALS....3D Printing. Croatian Motion.
Hi Robert, You wrote Your proposal is not solving following items, related to the "classic" moulded boats. According to the current IOM Class Rules: a) Gel coat is not listed. Is it permitted? b) Coloured pigment is not listed. Is it permitted? c) Is a filler made of resins with some filler (micro ...
- 25 Nov 2020, 20:40
- Forum: General IOM
- Topic: HULL MATERIALS....3D Printing. Croatian Motion.
- Replies: 101
- Views: 143795
Re: HULL MATERIALS....3D Printing. Croatian Motion.
The question of allowing glass fibre as an allowed material for thermoplastics could be achieved by a motion to reword D.2.1(a)(3) which says (3) Resin, which may be coloured and/or reinforced with glass fibres, but if it were changed around such as (3) Glass fibre. which may be bonded with resin, ...
- 25 Nov 2020, 17:10
- Forum: General IOM
- Topic: HULL MATERIALS....3D Printing. Croatian Motion.
- Replies: 101
- Views: 143795
Re: HULL MATERIALS....3D Printing. Croatian Motion.
Other thermoplastics with glass fibers poweder are also available, and are also permitted materials, so again no need to change the rules. In summary: keep rules as they are except clarify that 3d printed hexagonal infill is not a honeycomb material . Hope this helps. Antonio Hi Antonio, Thermoplas...
- 24 Nov 2020, 18:01
- Forum: General IOM
- Topic: HULL MATERIALS....3D Printing. Croatian Motion.
- Replies: 101
- Views: 143795
Re: HULL MATERIALS....3D Printing. Croatian Motion.
What if [...] the hull with different thickness of hull skin [...] advertising and selling such IOM boats as the state-of-the-art? Hi Robert I think looking at specific scenarios is a good way to explore the issues we have. In this case, I think a fragile super-light hull with different skin thickn...
- 24 Nov 2020, 13:51
- Forum: General IOM
- Topic: HULL MATERIALS....3D Printing. Croatian Motion.
- Replies: 101
- Views: 143795
Re: HULL MATERIALS....3D Printing. Croatian Motion.
Conclusions We can 3D print a nice honeycombed (20% infill) hull in g/f nylon filament with the same stiffness and same weight as a pre-preg S-glass hull but it'll have one third the strength. So this is not going to obsolete the fleet or threaten anyone with a nice g/f hull. This is simply due to ...
- 23 Nov 2020, 21:31
- Forum: General IOM
- Topic: HULL MATERIALS....3D Printing. Croatian Motion.
- Replies: 101
- Views: 143795
Re: HULL MATERIALS....3D Printing. Croatian Motion.
Yes, just using this open forum to, as I said, 'come to an agreed wording and get the motion passed'. Seems to be working so far, an open forum where the more experienced 3D printing home builders can have a voice and not just the commercially involved or a selected few friends. Must admit, some gr...
- 23 Nov 2020, 17:33
- Forum: General IOM
- Topic: HULL MATERIALS....3D Printing. Croatian Motion.
- Replies: 101
- Views: 143795
Re: HULL MATERIALS....3D Printing. Croatian Motion.
Hi everybody, and thank you Graham for the initiative. I personally like to explore the different possibilities that this technology offers; testing materials, techniques, etc. This desire to experiment and develop I think is shared by many and is conducive to creating more hobby and activity in th...
- 23 Nov 2020, 17:32
- Forum: General IOM
- Topic: HULL MATERIALS....3D Printing. Croatian Motion.
- Replies: 101
- Views: 143795
Re: HULL MATERIALS....3D Printing. Croatian Motion.
Reasoning for the proposed IOM Class Rule are given here for easy reference as submitted with the proposal. Maybe all interested are not aware of it: The purpose of the proposed IOM Class Rule changes is to formulate a construction materials section of the rules having in mind the original intentio...
- 23 Nov 2020, 17:27
- Forum: General IOM
- Topic: HULL MATERIALS....3D Printing. Croatian Motion.
- Replies: 101
- Views: 143795
Re: HULL MATERIALS....3D Printing. Croatian Motion.
This is the response to misleading criticism of CRO IOM CR proposal 2020 which Graham Bantock sent to the IOM ICA World Council members before the voting: (I am posting it here with his permission). The CRO IOM NCA forwarded to me a misleading posting on Facebook that criticises the CRO proposal co...
- 23 Nov 2020, 17:20
- Forum: General IOM
- Topic: HULL MATERIALS....3D Printing. Croatian Motion.
- Replies: 101
- Views: 143795
Re: HULL MATERIALS....3D Printing. Croatian Motion.
So a new rule proposal may look like 2D.1 (8) Thermoplastic, which may be molded, containing only permitted materials 8.1 for a 3D printed hull, any PLA (or abc) based thermoplastic with any additives (except -x,y,z) are permitted. 8.2 there are no restriction on infill nor any internal reinforceme...
- 23 Nov 2020, 17:09
- Forum: General IOM
- Topic: HULL MATERIALS....3D Printing. Croatian Motion.
- Replies: 101
- Views: 143795
Re: HULL MATERIALS....3D Printing. Croatian Motion.
Let's all have a discussion in the correct place, the IOMICA forum, and not Facebook or secret emails, yes, an open discussion with even luddites included. My understanding is that most want to embrace the new 3D Printing technology but the wording of the recent Croatian motion was not to everyones...
- 11 Mar 2015, 14:58
- Forum: Class Rules
- Topic: What "..shall pass through a 20mm, ring gauge." BOOM F.4.5
- Replies: 30
- Views: 45326
Re: What "..shall pass through a 20mm, ring gauge." BOOM F.
Please be informed that the Interpretation 2015-IOM-1 has been published on Technical part of the IOM ICA website.
Best regards
Best regards
- 11 Jan 2015, 16:46
- Forum: Class Rules
- Topic: What "..shall pass through a 20mm, ring gauge." BOOM F.4.5
- Replies: 30
- Views: 45326
Re: What "..shall pass through a 20mm, ring gauge." BOOM F.
Note that GBR NCA asked for interpretation on the IOM Class Rules regading fitting under the main boom.
See: http://www.iomclass.org/wp-content/uplo ... n-boom.pdf
See: http://www.iomclass.org/wp-content/uplo ... n-boom.pdf