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  1. K

    Hoarding - Not Always Bad

    I went by the local hobby shop tonight looking for a balsa "trailing edge wedge" to use as a fixed trim tab on the RV-10. Of course, given the nature of model building and scratch building today, they had very little balsa and certainly nothing that could be used as a trim tab. Later, while...
  2. K

    Airfoil Coordinates for Low Drag Shape

    The RV-10 has 6 external flap hinges. 6" long x 0.125" wide aluminum at the leading edge, stepping up to (net) 0.375" wide on the aft portion of the hinge. I'd like to 3D print fairings for those hinges. Can someone point me to a set of coordinates for a low drag airfoil to use for the fairing?
  3. K

    You're No Longer Actively Building When...

    You can't remember your credit card info for an order at Spruce.
  4. K

    Bare Steel to Painted Weldment

    Now that the RV-6's engine mount is off, I'm tasked with cleaning it up prior to welding the cracked welds and adding gussets. When I built the -6, I used one of the phosphoric acid conversion treatments on the steel prior to priming, but as I've stripped the weldment, there is evidence of...
  5. K

    Stewart Maximizer

    Apparently Don Stewart/Stewart Aircraft has stopped selling plans. Thankfully, I have a set of Headwind plans. What I don't have is a set of his Maximizer PSRU plans. Does anyone have a set they would like to part with?
  6. K

    Cowl Exit Streamlining

    One of the things I'd like to improve on the RV-10 is the cowling exit. One of the real impediments is the nosegear structure, which is a mass of welded tubes that really clogs the exit. Here are two pictures - one from the front which gives a sense of the structure involved and a second photo...
  7. K

    RV-10... What I Like

    In another thread, BJC suggested I post about what I like about my RV-10, now that I've been flying it for a couple of months. I'll go farther than that and give you unfinished work, likes, and dislikes... Unfinished Work: Optimization for cruise. I need to add a fixed rudder trim tab. I...
  8. K

    What I really hate.

    Is when a buddy and I just finished the final hanging of a C/S prop. And another friend says "You got a way to shrink that alternator belt?" The alternator is at the "far" stop and the belt is still loose. Do we have the emoji for a head beating against a wall?
  9. K

    How to Store Wings

    I need to store a set of wooden wings - wood spars, wood ribs, steel compression struts and fittings. The wings don't have a sheathed leading edge - just the wooden ribs, so I don't want to store them leading edge down in a cradle. What's a good way to accomplish this? Hang 'em in flight...
  10. K

    Structural Question

    This example isn't on an experimental, it is on the EAA's B-17 - Aluminum Overcast, which is grounded for the time being with a wing attach issue. Anyway, at the bottom of the linked page is a sketch of the wing mounting structure that caused the aircraft's grounding. What I found interesting...
  11. K

    What do you say...?

    You're having a water fountain conversation with a co-worker who knows you're a pilot and asks if you fly a Cessna or something like that. "Well, I fly an RV-6, which is an airplane I built." "Is that like a kit car?" Um...
  12. K

    Carb (?) Problem

    I've been battling a problem for 6 months and have exhausted virtually every idea/fix that has been offered, with no resolution. I have an O-320 D2J with a Marvel Schebler MA-4SPA carb. It ran fine for 19 years, but was beginning to show play in the throttle shaft, so I traded the old carb for...
  13. K

    Engine for Stewart Headwind?

    What's the appropriate engine for a Headwind? Personally, I'd be looking for something to spin a bigger prop slower. 40-50 hp at 2500 RPM should do it. Is there a recipe for that other than an A-65 (which is a little too much engine for the Headwind) or a Lycoming O-145 which also seems like...
  14. K

    Human Powered Flight

    I realize the Kremer prize was awarded 45 years ago, but is anyone currently pursuing human powered aircraft? Are there structural applications where carbon fiber could result in significant weight savings over the Aluminum tube/foam/mylar aircraft MacCready designed and built? I'm still...
  15. K

    Walter Engines

    Another thread piqued my interest. Walter engines: The Minor, the Micron. Are they still in production and is there a US distributor? I haven't seen them represented at SnF or Osh in several years, and even when they were represented, it always seemed like they were "about" to have engines...
  16. K

    Chroming Parts

    The RV-10 has 4 unique hinges for the doors. They are plain 'ol steel and are partially exposed to the elements. I'm tempted to have them chrome plated to avoid the chipping/rust that (I think) would happen due to the relative motion of the hinge halves if I painted the hinges. On the other...
  17. K

    It's Only Money

    I'm at the point on my current project where "It's only money". One more $60 hose, a $80 cable, maybe $40 in hardware, write a check to the painter. And have Amazon send another $20 in sandpaper and a $40 roll of masking paper. The only mystery is whether the total of the shipping costs on...
  18. K

    Over Sensitive Rudder

    I was reading the flight review of the BD-4 in the latest kitplanes and the article indicated (in more words than I'm using here) that the rudder was overly sensitive. How do you correct something like that?
  19. K

    I got The Deal!

    On Saturday, I ordered about $400 in oil, filters, camguard, etc and drove down to Aircraft Spruce East to pick it up. While I was waiting, I surveyed their "scratch and dent" section and did pretty well for myself. From the scratch and dent section, I bought 3 "gallon" jugs of Phillips...
  20. K

    The Best Laid Plans...

    Today was supposed to be a big day. I was to receive a new car's worth of avionics. Since I couldn't be home to sign for the shipment, I asked the dealer to ship the box 'o extremely valuable electronics to the nearest Fedex Location, where I would be glad to pick the items up and sign for...
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