Hi Wayne I appreciate your good advice and wisdom, however, I have experience with polystyrene foam in a KR wing being dissolved in flight and it is not good for the heart! I personally know a cozy builder that has had his tank spring a leak and had to replace a lot of foam in the wing, a very delicate operation. I build Whisper motor gliders for a living and their wings are 8m long each. The cores are cut on a CNC hotwire cutter in 1m segments with the washout already set. We join them with micro on a perfectly level table around the spar and glass over one side at a time. I have no worries about compromising the tortional strength of the wing as the tank will be bonded to the inside of the wing skins. This will offer much more ridgidity that the traditional methods. The bond between the different pieces is not a concern for me, if it is dome properly the bond will be at least as strong as if it was one piece. I plan on using 2mm or 3mm coremat as the core material
Regards Dene Collett Avlec Projects cc Builders of award winning aircraft tel:27419560048 cell: 27845805003 Port Elizabeth South Africa -----Original Message----- From: KRnet [mailto:krnet-bounces at list.krnet.org] On Behalf Of Wayne Tokarz Sent: 14 February, 2014 5:58 PM To: 'KRnet' Subject: Re: KR> New wing skin idea I think you will be compromising the torsional rigidity of the wings with three pieces and relying on a bonded joint, ( I could be wrong here
