Does anyone have a schedule for laying up the main spars using carbon rods for the spar caps and carbon cloth for the shear webs? How many rods (round or rectangular) - and their lengths per spar cap? Jim Marske describes the various calculations in his 'Composite Design Manual' but I'm not entirely comfortable with my knowledge of the subject. Kenny?

Does anyone have the details of Steve Arndt's Magic Dragon wing spars?

Phil.

PS - my newly converted 29' long workshop is now re-roofed, re-floored, painted, insulated, electrified, lit, secured and ready for action! Tools are arriving from various corners of the earth... progress is imminent!

PPS - I located a number of suppliers of 0.8mm plywood in the UK - all charging around £50/sheet of 4' x 4'. Expensive stuff! A little more research turned up a wood veneer supplier in Dublin (practically on my door step) who is offering 0.5mm veneers from €1.50 - €5/m-sq! ...and it comes in 4' x 8' sheets With sufficient support along the long dimension, between the external rib forms, this stuff should be perfectly suitable for use as a female mold for the leading edges. At that price I could even use two layers to beef up the mold skin and still not break the bank!

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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
Sent: 29 July 2011 11:11
To: This email address is being protected from spambots. You need JavaScript enabled to view it.
Subject: [Carbondragonbuildersandpilots] Re: plywood properties



The idea would be to sell multiple sets so that the cost can be spread out over several sets... Kind of like the wing tips somebody is selling! You have more experience at it, so you would know what would be reasonable.. it's just a bit 'inefficient' if everyone is repeatedly building tooling. The SD-1 uses a carbon spar -- I don't think their kit price seems too unreasonable -- buying the spar is mandatory since they use some tolling to produce it.

--- In This email address is being protected from spambots. You need JavaScript enabled to view it., "george_rf1" wrote:
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> It would be REALLY good if there were someone willing to make the carbon spar and Leading edge – that's something I would pay to have done.
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> That's very interesting , please do tell us, what would you expect to pay to hire someone to make the molds for leading edges and spars and the set of parts for you.
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> George