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  1. M

    Wing Max CL compared to existing homebuilts

    First of all I'd like to ask if anyone is aware of a reliable method to calculate the wing Max CL with regards to aspect ratio. I know of several methods to calculate the lift curve slope but this will not tell me when the wing will actually stall and what Cl i get at that point. I have also...
  2. M

    Effective angle of attack for a section

    I am trying to draw a span lift distribution chart but my maths knowledge is too rusty these days (currently trying to revise it). "Theory of wing sections" page 22 gives a formula to calculate the effective angle of attack for a wing section but I am unable to extract a value from it:tired...
  3. M

    Airfoil selection

    I am doing a little design exercise and I am trying to decide on a suitable airfoil. Most graphs have "standard roughness" data as well as normal data. The standard roughness gives a Clmax of 0.3 to 0.5 less than the normal data. This is obviously quite significant so my question is how rough is...
  4. M

    Bending sheet metal without a break?

    This question regards bending the sheet metal for spars and longerons. Is it possible to substitute using a large break with a wooden mold, basically using the same technique as for wing ribs? Would it be possible to be accurate enough? Cheers
  5. M

    Let's design together!

    Given how many talented and knowledgeable people there are here at this forum I thought it would be a good idea to combine our forces. I therefore think it would be a fun little exercise to try to design an aircraft together –online.:ban: I have used my own ”dream homebuilt”to specify the...
  6. M

    Sheet metal competition aerobat

    I posted about a month ago asking for help with finding a suitable wooden aerobatic homebuilt project. The help and suggestions I got from this community were amazing but I have through the continued research started to lean away from wood and my preferred material to work with would now be...
  7. M

    Aerobatic homebuilt, where to start?

    I have to goals: I would like to get into aerobatic flying, possibly competitions and I would like to build my own aircraft. I did 5h aerobatic training 8 years ago so I know that I like it but I will basically have to start from scratch again. I have a very limited building space in my garage...
  8. M

    Should I be afraid of welding?

    I am trying to find a suitable first project for myself but I am struggling! I will build it in a small single car garage (18'4" by 9'2") and I would like it to be aerobatic. Since I have absolutely zero experience with welding, my options have become very limited. How easy or hard is it to...
  9. M

    Power to weight ratio on WWI replica

    Hi I am looking at building the airdrome aeroplanes beautiful Camel replica as my very first project. The only example of it that I have seen is fitted with the Rotec 3600 producing 150bhp. However, the Rotec engines are outside my budget so I am looking at normal VW conversions instead. I...
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