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  1. PTAirco


    This thing is gorgeous: Klemm.
  2. PTAirco

    Cub rear seat attachment

    I can't believe with all the amount of Cub-stuff on the net I can't find a picture or drawing of the how the top of the rear seat sling is attached to the fuselage. Anybody out there near a genuine J3 that can snap some pictures? I sat in that seat often enough but I never really looked behind...
  3. PTAirco

    Wanted: Lycoming O-360-C1f or -C4F

    I have been looking for two years now, to no avail. I need on for my Maule M4, currently very underpowered with its O-300. Has to be this specific model to work with the factory modification. Only ever used in Maules, Scouts and not much else. Differs from other O-360s mostly in the flat...
  4. PTAirco

    In an emergency...

    I cannot believe there are controllers like this out there; a worthwhile watch.
  5. PTAirco

    Moment of inertia of Carlson spars

    Carlson supplies extruded 6061 spars used on many different aircraft and they might just be suitable for something I'm doodling on. I asked if they publish data on these such as Ix, Iy etc but had no response. I know I can sit down and dig out my old books and try to calculate it by hand but I...
  6. PTAirco

    Stampe replica

    This is thing is sooo nice! A great compromise between the original and something (relatively) cheap and practical. I really like the structure, cost effective and easy to build, but well engineered. The Mikron engine really makes the design. Very much what I was doing (structurally speaking...
  7. PTAirco

    Amboy fly in

    Upcoming Event: Amboy Fall Ride & Fly-In . Come out it Amboy in Sunday Nov. 8th for some distanced dissidence in the desert: Cars, Planes, and Amboy. Main event is 1100-1500. . Amboy has a 4000’ long dirt/gravel runway on BLM land adjacent to the historic Roy’s Motel and Gas Station. It’s the...
  8. PTAirco

    McCauley 76x51 prop wanted

    Anyone have one of these lying around, old but serviceable? 8 Billy pattern for an O-300. Pitch can be a little off either way, I can get it re-pitched. My old Maule isn't really happy with the current 74x60 cruise prop. Bargain basement examples preferred, I'm more or less experimenting with...
  9. PTAirco

    Who ever heard of Mr Longren?

    While looking at folding wing biplane designs I stumbled across the story of Albin Longren. He was apparently quite influential and a clever amateur designer who impressed a a lot of people and even the navy with his designs. He was once vice president of Cessna yet nobody ever heard of him...
  10. PTAirco

    Take off technique

    The current vogue in bush flying and popular STOL culture is to shove the stick forward at the beginning of the take off roll and the yank it back down with a more or less violent rotation. Often you see the tailwheel slapping the ground again. The argument is that lifting the tail reduced the...
  11. PTAirco

    Stuck valves

    I had my first stuck exhaust valve on an O-300 in my Maule M4. I've flown this quite a bit and most recently a couple of days ago. My friend borrowed it and flew it to Big Bear. Stayed overnight and flew it back in the morning. Barely got off the ground... Luckily it's all downhill to Flabob...
  12. PTAirco

    Old flying magazines.

    This will get you through any length of quarantine : Flying Magazine This kind of stuff sucks me in for hours. If I had the money, I'd pay someone to print all these out and bind them into magazines which I can enjoy for the rest of my life. Luckiliy a few are missing here nad there...
  13. PTAirco

    Medical extension

    If your medical ran out in March, the FAA says they won't bother you until June 30th. Mine did and I was pleasantly surprised that I'll get a few months extra. Medical Certification
  14. PTAirco

    Aviation week archives

    I love old aviation magazines. Flight Global had all issues of "Aeroplane" archived and online. Now Aviation Week has done the same, back to 1916. I signed up and registered and while I can log in, I can't seem to make the thumbnails expand so I can read the it at full resolution. Had anyone...
  15. PTAirco

    M14D engine

    I always liked the idea of this engine for my one-off biplane design, as an alternative for the V8 conversion it was designed for. Same as the M14P so widely used, except it has no gearbox. 220HP at 2000 rpm. It seems to have disappeared. Once it was available for around $11,000 remanufactured...
  16. PTAirco

    When can I get this?

    The material in the picture is an aluminum extrusion. 1/2 angle, 1/16"thick but with an extra small " bulb" sticking out of the corner. It is used in the rib caps of a certain unmentionable Cub clone. I looked everywhere, but nobody else seems to use it. If anyone here has come across a...
  17. PTAirco

    S-LSA downsides

    I have recently acquired two damaged Cub clones (manufacturer shall remain makes at this stage) that I intend to repair to good as new. One had minimal damage and one had a landing gear torn off in a ground accident. Typical repairs that have been done for literally a hundred years now and...
  18. PTAirco

    Amboy fly in

    Last weekend. There is a long gravel strip near the semi-ghost town of Amboy, California. Located on the old Route 66, it's basically a gas station, motel, post office and not much else. Its 1950s neon sign is well-known and was lit up for the first time in decades. The whole place is slowly...
  19. PTAirco

    Microsft Flight Sim 2020

    Ok. I'm seriously impressed. I know, I know - I will need an insane computer and a superfast internet connection to really get the most out of this. But this is a quantum leap as far as I'm concerned. MSFS got me through my instrument rating and it was boring and tedious. For fun flying when...
  20. PTAirco

    Oil cooler installation

    My O-300 engine has had an oil cooler installed sometime in the distant past. A very experienced IA today pointed out something which he thought was curious: an oil line comes from the top of the engine from the oil gallery and continues back to the oil cooler. The oil goes through the cooler...