hi robert,   how are you?   I think you are going down the track that would do th trick of keeping the shape nice and smoothly rounded, even if it means loads of battens (stringers),  type frame. This sounds like that vertical strip foam technique (that i haven't done). it would still be quicker on the flat table first , just more time making more mould.   the glass on its own was like how Rob described doing a mast - where there is no foam - so the fflat bit of first glass is done on a table, then bent into the mould, to act as the shape to lay more wet carbon or glass onto.   The thing I did this time with the foam bending panel for the extension, was get the panel on the mould with the inside glass still tacky green, and screw into each mould. Let it set, then glass on the top while still on the mould, and I screwed through the wet glass and foam into the moulds again to help get oit tight down to the hape. the bits in between the moulds would be further out - out of line.   So the batten/ stringers would sort of solve that problem I suppose. Maybe doing it with the inside totally fresh wet glass, but leaving a gap at where the moulds touch and then taping over the gaps at the end. Because it is the stiffness in the glass that was on the flat table that is trying to spread out ogf shape - Irecjkon.   On the dimensions of harryrproas, this 2:1 is looking so much better. The visionarrys harrys etc I reckon would look cooler at 20m/10m and 18m/9m or 15m/7.5m. I the argument against extra length really worth spoiliing the sailing ie. to fit marinas etc?   doug  --- On Fri, 29/5/09, Robert <cateran1949@yahoo.co.uk> wrote: From: Robert <cateran1949@yahoo.co.uk> Subject: [harryproa] Re: DER - how big a radius? bending foam To: harryproa@yahoogroups.com.au Date: Friday, 29 May, 2009, 12:18 PM --- In harryproa@yahoogrou ps.com.au, Doug Haines <doha720@... > wrote: > > Robert & them, >   > that idea of glass cured flat on its own then bent into the mould may solve the problems I had on harriette (and same now with the sidecar insert extension. >   > Coul;d the foam get glued on to the top or is that just the same porblem? Not sure what you mean > THe foam doesn't bend evenly for me. > This time (sidecar) I was using a male mould, but still it distorts out across the the spaces between mould frames. THe distances apart were 400mm. A very stiff edge batten firmly attached should help. You could also put some cheap ply on the outside with some longitudinal battens to keep it straight. >   > ?? What is Kelsall's trick? >   >   > Doug >   > PS boat is looking mean now Looking forwards to some pics regards, Robert > > --- On Fri, 29/5/09, Robert <cateran1949@ ...> wrote: > > > From: Robert <cateran1949@ ...> > Subject: [harryproa] Re: DER - how big a radius? > To: harryproa@yahoogrou ps.com.au > Date: Friday, 29 May, 2009, 9:55 AM > > > > > > > > > -Having half thickness core half glassed allows easy bending. . put strips of this on the edge of the panels, making them wide enough for overlap of the radius and give them tapered, sealed edges , and all that's needed is to glue them together, with maybe some cut and shut where there is a change in direction. They could be pulled into place with some battens and vacuumed to make a good bond. I was thinking of having the deck edge go over the side edge, the pre-resined side edge strip being forced to make a curve by being limited by the step between the different core thicknesses on the underneath of the top deck. The top edge is brought down by being pulled down with straps over a batten on the top outer edge of the deck. The joint is then vacuumed together, the sealing already in place before the strapping. > Aternatively, you can have the top half core strip unglassed, > and add the glass after, pulling it together with cling wrap-- In harryproa@yahoogrou ps.com.au, George Kuck <chesapeake410@ ...> wrote: > > > > Hello, > > Forgot to mention on the deck radius you would not have to make full frames for the entire boat only a number of small frames to fill in area between deck and side panel. > >   > > Alternately you could make a mold for a radius panel and then only put a vary thin glass layer on, enough to hod shape, and then slit one side as needed to bend in place.  The panel would be trimmed and glued in place and then glassed over overlapping side and deck.  This is similar to molding that is sold for radius ed edges for curved arches in drywall work.  I used this type of molding to form the edge on underside of the curved staircase in our house.   > >   > > If using Derek's method of putting curved edge on deck panel I would look into moldings for drywall work.  There may be one that is available and would save work of making mold as Derek does.  Derek may want to look into this.  There are and number of plastic moldings that are used to form radius ed edge in drywall. > >   > > George kuck > > Chestertown, Md.  > > > > --- On Thu, 5/28/09, George Kuck <chesapeake410@ ...> wrote: > > > > > > From: George Kuck <chesapeake410@ ...> > > Subject: Re: [harryproa] Re: DER - how big a radius? > > To: harryproa@yahoogrou ps.com.au > > Date: Thursday, May 28, 2009, 10:19 AM > > > > > > > > > > > > > > > > > > > > > > > > > > > > Hello Gardner, > > As far as I know Derek uses the mold for smaller radius es in a flat deck and puts a PVC pipe in laminate (stays in panel) on the side panel to form the inside radius. > > > > --- On Thu, 5/28/09, Gardner Pomper <gardner@networknow . org> wrote: > > > > > > From: Gardner Pomper <gardner@networknow . org> > > Subject: Re: [harryproa] Re: DER - how big a radius? > > To: harryproa@yahoogrou ps.com.au > > Date: Thursday, May 28, 2009, 9:12 AM > > > > > > > > > > George, > > > > You have a point that a large radius (like 8") could be just bent from > > the foam. My ww hull keel will be flat in the middle, then bent with > > 6" radius. > > > > The problem is the compound curvature that happens when the deck bends > > down and the hull bends in. I am gathering that derek's DER can > > somehow bend to match that curvature, although I am at a loss to see > > how. Maybe he slices the mold up every half inch? > > > > Strip planking would allow the compound curvature, but then I need to > > make frames and all for that, right? > > > > I think Derek is at a boat show, so I am not getting any feedback from > > him on the DER. > > > > - Gardner > > > > On Thu, May 28, 2009 at 8:21 AM, George Kuck <chesapeake410@ yahoo.com> wrote: > > > > > > > > >

•  1
  New Members
•  1
  New Photos