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  1. pictsidhe

    Parts For Sale Parachute For Sale $300

    National 425, manufactured 2003, never deployed, worn about 20 times during flight testing. Like new. Stored in a bag in a dry place since 2004. Asking $300US.
  2. pictsidhe

    Industrial engine conversion. *Private* group.

    I am trying to start a private conversation on industrial engine conversions. It is for the discussion of the use of industrial and similar small engines. I have done this as I am fed up with public threads consistently being dragged off into the weeds by a few people here. If you are interested...
  3. pictsidhe

    Material choice?

    I'm going to start making proper use of the machinery at work ;) First up, engine and redrive parts. I want to double up the oil pump rotors. The dead simple way to do this is to make an extended cover. The extra rotor will run inside that. I am wondering if all the 6061 laying around at work...
  4. pictsidhe

    Supplier of an385 pins?

    Anyone know of a supplier of an385 taper pins? I am looking at my folding wing joints, and AN385 look like baby bear's porridge. But I can't find any. I need longish -6 alloy steel. Plan B would be industrial grade -7 stainless.
  5. pictsidhe

    Ultralights in Central and South America

    I may be losing my permanent resident status in a few months. Topaz does not want me saying why... Does anyone know about ultralight and lsa type rules in central and south America? I'd like to find somewhere it's not too hard to do. I will still be able to visit here, should I come up with a...
  6. pictsidhe

    Still breathing!

    This thread is for members to let the others know their Covid status. I can't see any relevant threads on here. Apologies if I'm flouting a rule I am unaware of. No discussion of Covid! This is facts about you, no opinions or facts from the media. That will go down the toilet of politics way too...
  7. pictsidhe

    Thanksgiving

    Happy Thanksgiving to my New World friends!
  8. pictsidhe

    What is this engine?

    Came across this in a motorcycle museum.
  9. pictsidhe

    Marking out aids.

    I'm working on a mockpit when I have some spare time. I got the last of my important bulkheads lofted today, and then wanted to transfer to cheap ply. I managed to loft everything with straight lines and circular arcs. That will make alterations and flat wrapping far easier to calculate when I...
  10. pictsidhe

    Hawker Hurricane Mk103

    Many of you will be familiar with this project, I've posted bits here and there on the forum. I started a discussion thread here about a year ago. What is a Mk103 Hurricane? It's a 2/3 scale AC103 legal Hawker Hurricane, of course! Why a Hurricane, and not a Spitfire, or P-51? Well, I'm...
  11. pictsidhe

    G10 properties

    Does anyone have a lead on creep properties for G10? All I can find is 'good' or 'excellent' I need numbers...
  12. pictsidhe

    50c/ft 4130

    Yes, that is correct. I just went to Wickes website to see how much 2 1/4 x 0.120 4130 is and ended up spending rather a lot of money. Mostly on 50c/ft 4130. Some I need, some I will probably need. A lot will probably handy some time... They seem to be pruning their inventory. Cheap sizes in...
  13. pictsidhe

    Metrology tools. Decent quality, not too pricey?

    I'm looking for some metrology tools. Up to now I've just used Horror Fright stuff. Well, my HF digital verniers are 0.4% absolute accuracy. I haven't checked the linearity etc... OK for crude measurements and comparison, but useless if I'm trying to build to a reasonable spec. I have found...
  14. pictsidhe

    CNC tweaks

    I had a Chinese 3040 4-axis cnc turn up today. A first look and it looks pretty useable. With one exception, the chuck timing pulley has been made with too small a PCD, the belt doesn't mesh properly. The seller is a drop shipper and I got it 25% off after someone else bought it then returned as...
  15. pictsidhe

    V4 1/2 LS

    Not made by GM, but just came across an interesting V4 based on the LS series. 1650cc, 150lb. Peak torque of 126ftlb. At a piston speed of 2500fpm, power is ~135hp at 5600rpm. Would need a redrive. I saw in an article that the crate engines are $10k. Motus V4
  16. pictsidhe

    Electrical system generators.

    I've been pondering various UL engine possibilities and one thing keeps jumping out. The generators in current use are awful heavy. A Briggs single cylinder 5A stator I have is 11Oz, the entire flywheel is a foot breaker, but likely has several ounces of magnets. anyone wanting to go direct...
  17. pictsidhe

    Paint temperature test.

    I want to paint my plastic aircraft project in dark colours. I am concerned about it wilting in summer sun. I recently came across Sherwin Williams 'Vinylsafe' paint. It is designed to be safe on vinyl siding. It is exterior Sherwin Williams latex paint tinted with only certain pigments...
  18. pictsidhe

    Power tool cells

    I thought others may be interested in potential cells to be used for e-flight. Battery power tools tend to come with high discahrge rate Li-ions. They seem like they could be ideal for hybrid systems. A neighbour just pawned a worx tool with me and I opened up the battery to see which cells it...
  19. pictsidhe

    Stall progression

    Some of you may have noticed that I'm a little wary of designing a wing from scratch and getting it's stall characteristics acceptable. Half the trick is getting the inboard portion to stall first. Here's a great NASA paper about doing just that. Some of my Hurricane aero efforts will be to...
  20. pictsidhe

    Doubloe dimpled shear strength

    Attempting to design a joint with double dimpled rivets and I cannot for the love of google find a value for yield shear using AD rivets and 6061-T6. Best I've found is 2024-T3 sheet and ADs. Anyone have some numbers?
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