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  1. K

    Rivet pullers - hand, pneumatic, add-on, cordless

    If you're building an aluminum airplane, even one designed around smashed rivets, there are going to be at least a few places where you'll need to pull a rivet, and an RV-12, Sonex, Hummel Ultracruiser, Airodrome replica, Graham Lee replicas, Zeniths, are all designed around inexpensive pulled...
  2. K

    Additional Pilot Program for Phase 1 Testing

    Anyone ever used this? As described by AC 90-116 http://www.faa.gov/documentLibrary/media/Advisory_Circular/AC_90-116.pdf I'm thinking it MIGHT help get liability insurance for Phase 1 testing. Finding a pilot with Time In Type (Sonex) could be like finding a virgin at Studio 54, or a...
  3. K

    Keeping a Wooden Airplane On A Tiedown

    I'm thinking of buying a Gardan Minicab built about 40 years ago and hangared all it's life. In the inner Bay Area, hangars are Unobtainium. I'm wondering if there is anything I can do short of recovering to protect the wooden structure under the fabric. Since it never rains here in the summer...
  4. K

    3D printed wheel spacers for Azusalite wheels

    I may be out of my mind, but I thought I saw somewhere a picture of a 3-D printed spacer, used with longer bolts, to allow fitting wider than normal tires on an Azusalite plastic wheel. I now can't find any web evidence of it. Is this ringing a bell with anyone?
  5. K

    Flight Test Areas for us Urban Dwellers?

    Does anyone have any idea what sort of flight tests areas have been assigned for the San Francisco Bay Area? Specifically, KOAK or KHWD? KCCR would also be of interest. Is it even possible to do initial flight testing given the Class C airspace over KOAK down to the ground? Those of you based...
  6. K

    Used Kohlers, POTENTIALLY suitable for SMALL, LIGHT aircraft use, are dirt cheap

    I bought one, a CH25, for about 1/4 of new. Particularly if you're going to be breathing on them anyway (internal and external mods) and plan to take it to bits, it makes starting with a Kohler at least as attractive as a new two cylinder Predator, which has poor parts and technical support...
  7. K

    Not Mine - Nesmith Cougar for sale in Pennsylvania

    http://wienerdogaero.com/Cougar.php Fresh "field overhaul" of 0-235, snazzy recover using his well-developed latex over dacron process. A few squawks on the condition inspection worth correcting. He doesn't mention price, but the engine alone is worth at least $8K, based on Barnstormer...
  8. K

    Nice single seat cub on FaceBook marketplace in Tulsa

    http://www.facebook.com/groups/588676317903388/permalink/3246452725459054/?__cft__[0]=AZW6ZD__-AFVbtb5M8hVuKKskzr1_h4M874MAMb3ZQycRWHuCeO8AZueehfKZ08vDNFJnLtR0XJWVlKi9ZutveSwf_Nl0uo8vWAVHAdOKM6DMi4fCgR7flxsT05LyyaQ3F7eY1OQmEMoQ2-2m4jLHYNoDcFYv7wRms9efcjLXXTWDw&__tn__=%2CO%2CP-R Looks like a...
  9. K

    For Sale A Flying Flea for sale in Kansas

    Christy Nicole McCormick has one the TWO HM14s she has built (!!) up for sale. This is a hangered airplane, that was flown in 2018, behind a 28 HP Global 1/2VW. No engine at that price is my understanding, but it will take most anything from 25-50 HP. Dacron fabric, rib stitched, original...
  10. K

    Another speculative thread - adding forward sweep to solve CG problems

    AERODYNAMICALLY, what would the impact be of adding some slight forward sweep to an existing Light Sport sized single place parasol, originally fitted with a Rotax 2-stroke? The idea is to re-do the wing attach points and the struts and get the center of lift a wee bit further forward to...
  11. K

    Back of the envelope conversion of Steel Tube fuselages to Aluminum Tube and Gusset

    In our discussion of airframes suitable for Industrial V-Twins, I've noted that the airframe I'd really like to build (aluminum tube and gusset, with aluminum spars and ribs, parasol - I don't weld, can't weld in my current shop) isn't out there as a plans built design. So I start diddling...
  12. K

    Proposed flywheel direct drive adapter for Honda/Lifan/Predator/Duromax engines

    Discuss. Suitable "drops" are available via E-bay for about $30. See my previous for sources for Rotax prop extensions; the Saber ones are the nicest and made in the US, the Airtrikes are the cheapest and come to you from the Ukraine. If anyone is aware of an online "brokerage" for small run...
  13. K

    Rotax 912 Prop Flange Dimensions

    I've been noodling around, examining design alternatives for relatively easy ways to direct drive props from the flywheel end of various V-Twin engines, and had a need to know what the Bolt Circle Diameter was for Rotax engines. Rotax prop flanges, at least on the current 912/914s, are as full...
  14. K

    Peter Sripol is at it again...

    He took gasoline paramotor off his last airplane (it doesn't want to be a tractor), built new wings (2-axis), and used an ELECTRIC paramotor powerplant. First flight was a little hairy, he added 6 feet of wing, now flies pretty OK. Wing is a hot-wired foam truss work with aluminum spars...
  15. K

    Water Injection for Industrial V-Twins

    ...has been suggested for cooling at high power levels. Have you done it? How would you do it? I have my thoughts, after researching it a bit, but I'm wonder what the GroupMind thinks.
  16. K

    US Made Redrive for industrial V-Twins

    Ace Aviation is probably well-known to readers of this forum, Lone Star Hovercraft perhaps less so. http://lonestarhovercraft.com/reduction-drives/ Roughly $200 more than their South Asian competition. I see nothing to choose from between them. Neither of them have a torsionally soft element...
  17. K

    Briggs vs Kohler and the state of the market for modifications

    Bottom Line Up Front: The Mud Motor market is 10 times the size of the Tractor Racing/Pulling market and will come to drive the modification market, and Briggs OWNS this market. Surface drives for marine propulsion have been around since the Hickman Sea Sled of 1914...
  18. K

    Working on an airplane on the ramp

    I'm thinking about buying an ALMOST flying airplane project, but when I do, it will lose the hangar it's in, and there are NO hangars to be had in the San Francisco Bay Area at a price I can afford. I anticipate needing to do a bit of fettling, on a tie-down. But it will start raining soon...
  19. K

    Building Partner sought - SF Bay Area

    I have long held the dream of building and flying my own plane, and have worked on several projects. I have a private pilot's license, a fairly well equipped shop, and skills in aluminum, steel, wood, and composites fabrication. What I do NOT have is a space big enough to build wings and...
  20. K

    Driving a Honda/Clone from the Flywheel - Honda Part to do it.

    There is a Genuine Honda part that does just that. Same 1" shaft as some of the Hondas and all of the clones I have seen described. Part 23311-Z6L-820. About $180. Add an appropriate taper lock bushing (P2x1 Split Taperlock Bushing [060P21] - $32.95 | Universal Hovercraft) a Universal...
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