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Title: Where can I get an EPP/EPS foam block to hotwire an airfoil Post by: ashutoshn on April 11, 2012, 09:30:27 PM I am in the need for a blue core foam which is around a 1inch (25mm) in thickness. The exact type of foam that I am looking for is the blue Styrofoam EPS, EPP. Did some search here on rcindia.org. Depron is the most common build material, while I am yet to come across a thread where blue Styrofoam EPS, EPP is used. I am looking to hot wire a pair of airfoils out of this foam block. Let me know where can I get this material. Also, if anyone has used material other than EPP/Styrofoam EPS to make an airfoil please give some pointers. Thanks. Title: Re: Where can I get an EPP/EPS foam block to hotwire an airfoil Post by: foamybuilder on April 11, 2012, 09:37:30 PM As far as I know no one does airfoil cuts on EPP due to cost/wastage. Some do it on styrofoam block though. Akshay had bought some from JC road if i remember correctly.
There are many posts in rcgroups comparing the KF airfoil with traditional airfoil for a medium sized foam plane. Some say there is no added advantage in the flying characteristics for such small sized planes. Given the effort to output ratio I would go for a KF. Title: Re: Where can I get an EPP/EPS foam block to hotwire an airfoil Post by: sundaram on April 11, 2012, 10:00:39 PM +1 to Ashok.
EPP India is the source. EPP is four times the cost of depron inch to inch. Flexible so needs good reinforcements, further EPP is difficult to work with and sanded. Though effects of wire cutting is same as any other foam. Further advantage is resistance to damage and ease of use of any glue. Though EPP which is cut drinks CA. Though not a wire cut airfoil this one attempt http://www.rcindia.org/electric-planes/build-and-fly-log-of-3d-profile-su-26/msg97315/#new Title: Re: Where can I get an EPP/EPS foam block to hotwire an airfoil Post by: ashutoshn on April 12, 2012, 01:57:48 PM Thank you folks for your valuable suggestion. Hope to start building soon ;)
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