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  1. rtfm

    The AFB (Amazing FleaBike)

    There seems to be a very large difference in performance in aluminum welding rods. This is a very illuminating video test of the major brands. Some of the rods are quite impressive. I'm considering making an aluminum gas tank using this method... Duncan
  2. rtfm

    Suitable steel for all brackets etc.

    So I'm guessing 3mm 6061-T6 is out of the question?
  3. rtfm

    Why round tubes for landing gear?

    Thanks for the info guys.
  4. rtfm

    Why round tubes for landing gear?

    Thank you all for your comprehensive replies. There is so much information to be had on this forum!
  5. rtfm

    Why round tubes for landing gear?

    Hi, I'm sure there is a perfectly obvious reason all landing gear are constructed from round tubing, but I don't know what it is. Anyone care to enlighten me? Likewise for wing struts. Duncan
  6. rtfm

    The AFB (Amazing FleaBike)

    Well, it's official. I am crap at spray painting. I tried three times to spray on the spray putty undercoat with varying degrees of success, and ended up sanding almost all of it off. I *was* left with a very smooth surface on which to apply the paint, so I guess it wasn't a complete failure...
  7. rtfm

    how is double ender going now?

    Hi opcod. Not sure I follow your argument?
  8. rtfm

    how is double ender going now?

    Couldn't disagree with you more ToddK. High on novelty - check. 'a solution in search of a problem" (bloody hell, I hate that cliche) NO. It is a rather elegant solution to the problem faced by every airplane designer - that of getting the CG right. One big engine up front, and you have to...
  9. rtfm

    The AFB (Amazing FleaBike)

    OK, here is my (proposed) paint scheme. The wing is a bit cheeky, because although it is a rectangular planform, it will *look* like a sexy curved wing. Ha ha. And what do you think about the basic colours and shape of the fuselage? I like it (although it is probably going to change slightly...
  10. rtfm

    Tailwheel config question

    Hi, I am assuming that the further aft the CG is from the main gear, the more difficult it will be to keep a tail dragger tracking straight down the runway, and vice-versa. Are there guidelines for this? Raymer suggests an angle of from 16 deg to 25 deg from the main gear to the CG. My...
  11. rtfm

    The AFB (Amazing FleaBike)

    I reluctantly agree. You know how it is - one gets an idea, and it becomes an all-consuming passion. It takes both time and counter advice to finally percolate through and allow one to see things differently.
  12. rtfm

    The AFB (Amazing FleaBike)

    Point taken, rotax618. I've spent the afternoon creating a straight rectangular wing, which is both free of aerodynamic gotchas, as well as probably easier to build. But I still don't like the full-size final rib - looks kinda ugly to me. Oh, well...
  13. rtfm

    The AFB (Amazing FleaBike)

    Serious question, and advice/opinions sought: I'm beginning to have second thoughts about using a tapered wing on the Fleabike. "Standard" Fleas have rectangular wings. This makes positioning the pivot points easy (at say, 24% chord). But what about tapered wings? Where do I position the...
  14. rtfm

    New Sonex High Wing Design

    Absolutely agree. Fly with non-dominant hand, leaving dominant hand for writing, fiddling with radio etc. For me it's a no-brainer...
  15. rtfm

    The "Skyflow" cedar strip Flea

    Hey Rotax618, I have plenty of foam in the workshop, and I agree with you regarding the weight savings. But I don't want to build a composite plane. I want to build a wooden one. But I'm struggling to see where all the predicted weight is going to come from with the cedar strip fuselage. The...
  16. rtfm

    The "Skyflow" cedar strip Flea

    Hi Tiger Tim, The plan is to build the bottom section first (just like a canoe) exactly as you've described. The bulkheads are precision cut to fit on top of the glassed inside and then be glassed in place. The problem with your second scenario is (1) the inside glassing is going to be a...
  17. rtfm

    The "Skyflow" cedar strip Flea

    O ye of little faith... ;)
  18. rtfm

    The "Skyflow" cedar strip Flea

    Hi Rotax618, Early conceptual stage only at the moment. But you're right. I'm off to the timber merchant this afternoon, so I'll take my little digital scale and weigh a few longer pieces of the 6mm x 19mm Western Red Cedar strips to get an accurate weight. I know I'll need 60 linear metres...
  19. rtfm

    The "Skyflow" cedar strip Flea

    OK, FINAL option - Standard Flea configuration, but with twin fins. Just to jazz it up a bit. Now I must get back into the workshop to work on the wing folding mechanism (still not cracked it...)
  20. rtfm

    The "Skyflow" cedar strip Flea

    Hi, As BBerson indicates, glass inside and out is required for stiffness. Weight? Remember, the Skyflow fuselage is only 3 metres long. That's tiny.
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