PilotSmith
Posts: 248
Joined: 10/22/2004
From: USA, USA
Status: offline
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Hey Vicman, were you asking me about the paint? If so, I used (this time) airbrush acrylic paint. Same as the cheap $0.69 a bottle craft store paint but thinned down already for an airbrush. However, I did have to go thick on the white paint. Remember it was once painted Blue Angles theme. Very hard to turn dark blue foam back to white as unless you go thick or the blue in the pores shows through! Also, the plane already had a couple coats of paint before the crash and repaint to the new red and white theme. (Remember, the first coat of blue ate up some of the foam so I had to repair and repaint from that little fiasco too.) So I probably have an extra ounce of paint on the thing that should not be there. I just tell myself the extra weight will make if fly better on windy days.  If I were to do it all over again, it would need very little paint as a very light coat on the white Depron would be all that was needed.
So as of now I have learned the hard way that: 1) Spray paint that tested fine on a test piece of Depron foam can still eat away your plane. The test piece was not sanded and a lot of areas on the plane were sanded. The paint attacked the sanded areas. 2) Painting white over a dark color foam uses a lot of paint! 3) Never use the BEC on the ESC when uisng a 4 cell LiPo unless you want a realistic looking crash complete with smoke coming out of the aircraft from an incinerated ESC. And finally 4) The is no such thing as an inexpensive EDF plane. So much for my idea to convert an inexpensive 3D Foamy into and inexpensive EDF jet. The goal changed to just build the dang airplane and not look at the receipts.
Martno1fan, Yes, static testing electrics with a prop can load up the system quite a bit more than what it will see while flying. I burned out a couple can motors learning that priniciple last year when I fist started with electrics. But by what I read on EDF, the static and dynamic load is about the same. I even read that on certain EDF setups the load can actually be a little higher flying than static. Not sure how that can be.
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All Forums >> Electric Aircraft Universe >> Electric RC Jets >> RE: 3D-Foamy F18 EDF Mini Fan 480 Project 
RE: 3D-Foamy F18 EDF Mini Fan 480 Project - 
Or better yet how much are you using. It looks great but a little thick? I think I am going to try the same scheme when I get back home.
Only after the 2nd one fried was it that another person at CC asked about the BEC and said the BEC could cause the entire ESC to fail. 