Phil,
Thanks for the great updates and videos! Could you please specify the resin and hardener that you use? Does the resin-to-cloth ratio end up similar to a hand lay-up? I am very interested in this process. It looks to be a practical way for me to fabricate large lay-ups by myself. Can this process be used to lay up a wing skin where you have several layers of cloth, then a layer of foan and finally a layer of cloth? Will the resin flow to both sides of the foam to sufficiently wet the cloth? Any other info is always appreciated. What brand/model vac pump do you use? Thank you in advance. It is appreciated. Mark

--- In This email address is being protected from spambots. You need JavaScript enabled to view it., "Philip Lardner" wrote:
>
> Hi Kenny,
>
> The drag spar on the CD runs from the main wing spar at rib #3, through rib
> #2 and exits somewhere(?) through the root rib (#1) to join onto the tail
> boom.
>
> The 1g load on rib #2 is 8.51lbs, which goes up to 42.53lbs at 5g and
> 68.05lbs at 8g. My test ribs were good to just shy of 10g (yes, overkill!)
> Full numbers for all ribs in my spreadsheet in the group files section.
>
> I haven't a notion of the load on the drag spar yet! Any ideas on how to do
> the calculations?
>
> Phil.
>
> _____
>
> From: This email address is being protected from spambots. You need JavaScript enabled to view it.
> [This email address is being protected from spambots. You need JavaScript enabled to view it.] On Behalf Of Kenny
> Andersen
> Sent: 23 April 2012 23:16
> To: This email address is being protected from spambots. You need JavaScript enabled to view it.
> Subject: RE: [Carbondragonbuildersandpilots] Re: Phil's CD - resin infusion
>
>
>
>
>
> Philm
>
> generally you would split the one with the least load. Having not done the
> cal for the dreag spar, I can't say which one that is. Interestingly enough,
> the Arc seems to have a drag link rather than a full spar (which may be
> lighter. refresh my memory -- how much load did your rib support. Which
> rib was it? I'm showing (preliminary results that rib two is only good for
> about 50 Lb at the tip...
> Kenny
>
> --- On Mon, 4/23/12, Philip Lardner <philiplardner@...> wrote:
>
>
>
> From: Philip Lardner <philiplardner@...>
> Subject: RE: [Carbondragonbuildersandpilots] Re: Phil's CD - resin infusion
> To: This email address is being protected from spambots. You need JavaScript enabled to view it.
> Date: Monday, April 23, 2012, 4:50 PM
>
>
>
>
>
>
> Second batch of ribs just cured - going into the oven tomorrow for post
> curing.
>
> My latest video offering -

- shows how the ribs
> are laid up before infusing. Riviting stuff... but I thought I might as well
> document how I'm doing each step in fabricating an all-Carbon Dragon!
>
> That's more or less all the main wing ribs done - just have to do the #2
> ribs, which I am going to re-jig a little. The original plans call for a one
> piece #2 rib and a two part drag spar glued either side of the rib. I think
> it makes more sense to fabricate the drag spar in one piece (for greater
> strength) and split the #2 rib instead. I'll make the #2 rib moulds once I
> have the exact dimensions, point of intersection and angles of the joins all
> worked out.
>
> Phil.
>
> _____
>
> From: This email address is being protected from spambots. You need JavaScript enabled to view it.
> [This email address is being protected from spambots. You need JavaScript enabled to view it.] On Behalf Of KarlS
> Sent: 07 April 2012 14:45
> To: This email address is being protected from spambots. You need JavaScript enabled to view it.
> Subject: [Carbondragonbuildersandpilots] Re: Phil's CD - resin infusion
>
>
>
>
> Pretty cool Phil. Thanks again. Your video shows the real McCoy of what is
> done and how it is done.
>
> Looking forward to see how you trim it up. Your trim table sounds like it
> will be a nice tool as well.
>
> Karl
>
> --- In This email address is being protected from spambots. You need JavaScript enabled to view it., "Philip Lardner"
> <philiplardner@> wrote:
> >
> > Hi Karl,
> >
> > Busy week here, with all sorts of things distracting me away from CD work!
> > However, I did get my first batch of ribs post-cured and demoulded. I
> > haven't trimmed and finished them yet - I'm building an adjustable
> table/jig
> > to hold my high-speed multi-grinder (Dremmel type tool) this weekend and
> > will post details of that when it's all working.
> >
> > The ribs (in the rough) look great - the female moulds worked a treat and
> I
> > will do the next batch next week, hopefully. In the meantime, here are a
> > couple of videos showing the debagging and demoulding process.
> >
> > Debagging the cured parts after 48hrs curing at room temperature:
> >

> >
> > The parts were post-cured in an electric (kitchen) oven for
> > <blocked::mailto:4hrs@40C> 4hrs@40C, then
> > 4hrs@50C, 4hrs@60C and finally
> > <blocked::mailto:4hrs@80C> 4hrs@80C. This is a bespoke regime given to me
> by
> > the resin manufacturer for a higher final temperature than they normally
> > advertise, and specific to this particular resin.
> >
> > Demoulding the post-cured parts: <

>
> >

> >
> > Coming soon... trimming and finishing the parts...
> > Enjoy!
> >
> > Phil.
> >
> > _____
> >
> > From: This email address is being protected from spambots. You need JavaScript enabled to view it.
> > [This email address is being protected from spambots. You need JavaScript enabled to view it.] On Behalf Of KarlS
> > Sent: 06 April 2012 19:32
> > To: This email address is being protected from spambots. You need JavaScript enabled to view it.
> > Subject: [Carbondragonbuildersandpilots] Re: Phil's CD - resin infusion
> >
> >
> >
> >
> > Hello Phil,
> > I was just wondering how your parts turned out? Hopefully well.
> > Karl
> >
> > --- In This email address is being protected from spambots. You need JavaScript enabled to view it.
> > <mailto:Carbondragonbuildersandpilots%40yahoogroups.com> , "Philip
> Lardner"
> > <philiplardner@> wrote:
> > >
> > > Hi Folks,
> > >
> > > Thought this might be of interest - I infused my first batch of ten wing
> > > ribs yesterday evening, Three hang gliding friends came along to watch
> the
> > > process... one of whom is taking a serious interest in the Carbon
> > Dragon...
> > >
> > > The moulds are very easy to set up, and with just a little care, all
> signs
> > > of bridging between the mould and the work surface can be easily removed
> > > with my favourite kitchen implement! My workshop is cooler than my
> kitchen
> > > (where I infused my initial test pieces) so I'll leave this batch to
> > > complete its initial cure for 24 - 48 hrs before I de-bag and trim them.
> > So
> > > far, all the signs look good. I really am impressed (as were my friends)
> > at
> > > just how clean the infusion process is - no mess or sticky hands
> > whatsoever!
> > >
> > > My only mistake was in thinking I needed one last pot of resin... most
> of
> > > which ended up in the catch pot. I had to remove that to outside the
> > > workshop before it exothermed and started a fire. Being able to clamp
> off
> > > the vac-bag from the catch pot to change the paper cup inside is very
> > > useful!
> > >
> > > One other very useful lesson learned was that I it would be easier (for
> > the
> > > purposes of eliminating bridging) to cut separate pieces of peel ply for
> > > each rib rather than (as I did this time) use a single large piece of
> > cloth
> > > to cover all the ribs. Cutting the infusion mesh layer in strategic
> places
> > > (but not into separate pieces) between the ribs also greatly assisted in
> > > removing bridging.
> > >
> > >

> > >
> > > Enjoy,
> > >
> > > Phil.