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Diyguy

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About Diyguy

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  1. Been away from the forum awhile, working on other projects, so not sure what new innovations have been developed. I've been intrigued by the idea of an ALS used in some full sized craft. I noticed one day on a robotics site, several versions of a light beam tracking robot, or at least a black line on the ground. Wondering if an aircraft could be made to track a light beam from the ground, like a laser beam, at least as far as rudder control, perhaps as a starting point? Think it's possible? Bill
  2. New, never mounted, used, or hooked up. It was for that project that never got done! $110 + shipping. email me at wsmalley-AT-citlink.net
  3. Perhaps some of you have seen the Visual GPS site's new free download called "VisualGPSce". Looks like one could have a PDA 'dashboard'. I have it on my iPAQ 3870/Garmin 12, works good. Despite the apparent Gov't selectivity, the variometer works pretty well. Sitting still, the altimeter varies as much as 50 feet. Anyway, pretty neat screen. Bill
  4. Can this be made to interface with your GPS easily, or would it require development of some interface board? Would be cool to have a small amp with speaker, to give you some sexy feedback on your flights.
  5. Great article! One can only imagine what future uses will be created with 'model airplane' stuff. I think I got some of that African dust up my nose.
  6. That, Soulglow, is a nifty idea! I'll have to research that device. Do you happen to know what it is called? I had looked at some skydiving sites looking at altimeters, but didn't see that device mentioned. Bill S.
  7. Short answer, Alain, I don't know. First of all, I have yet to determine what a 'contact altimeter' (used in the original) is, or was, thereby ruling that in, or out. I would assume full sized aircraft had, or have, the same problem and I assume use an external pitot to 'read' the pressure. The much reduced altitude differential-say from 500' down to 150'- doesn't leave much room for error. The hackable sonar devices, like a Polaroid camera, I don't think would work 150-200' up. A laser altimeter device is beyond me. I'm not sure a WAAS enabled gps would give a quick enough response time either-perhaps from 5000' down to 1475' it might work (apparently 1475' was the altitude used in the original Ju87, though I think that must have relative to a particular geographical area-wouldn't be much help diving into a mountain 5000' high).
  8. Thanks for the thoughts. Had not thought about using GPS data, but think your right about the time delay. For a model to do this in a scale like fashion, it would have to 'pull up' at about 150-200' to be realistic. I guess one could use a Futaba PAL or FMA Co-pilot to accomplish the appearance. That would call for a judgment at the proper time. Interesting to me the Germans could figure this out in the 1930's with no electronics to speak of! 93000' drop, that's impressive!
  9. 'Up' elevator! I have a short kit of the Ziroli 'Stuka' and would like to incorporate the 'automatic pull-up' feature. Apparently the "contact altimeter" was set at 1475 feet which initiated the sequence, pulling the plane out of the dive. The pilot, as I understand it, pushed a button when he commenced his dive, this engaged the dive brakes, etc., the rest of the maneuver was carried out through visual observation of gradients painted on the window.
  10. Wondering if anyone is familiar with a type of altimeter which can be preset to trigger something-switch, circuit-at a predetermined altitude. I was doing some research on the 1930's vintage Ju 87 'Stucka' which purportedly had an 'automatic flight assistance system' ,using a "contact altimeter", to trigger an 'up' response which pulled the plane out of a dive if the pilot blacked out. I read of a laser altimeter used by NASA, but the 30's era technology must have used a fairly low tech solution. The point is, I was wondering how you could replicate this action in a model. Any thoughts?
  11. Can't help but wonder if smaller, affordable, UAV's would have made a difference in the Gulf Coast area with search activity. Seems like there are two kinds, the small .60 or so DIY jobs we build, and the multi-million $ Predators. Maybe there are some things in between, I don't know of. I recall the USMC was trying out a small battlefield model awhile back. Just seems like local authorities could sure use them and could be a lucrative business for someone. E.g., What could be offered in the $1-5000 range in terms of platform and equipment? No, I'm not planning on starting a business, just wondering what could be offered that would do a job. For instance, what kind of range would a local police force need? How much 'time on station' to be of practical benefit? What kind of video, audio requirements? Interesting mental exercise, I think.
  12. Have in my hand now a mouse I was looking for an excuse to replace! I'll see if I can see what your describing.
  13. Gee, that was easy, wasn't it! Now I grasp the concept. As has been said, all is relative.
  14. Flutter, I can't tell how the stall warning is incorporated in the above AOA device. I'm still confused about the "relative angle between angle the wing and free flow". Without going back to some of the sites I looked at, I got the impression some of these AOA indicators could be used for setting up one's glide path. If we get that far, maybe we can have a 'balling Bruce" for those so inclined!
  15. Maybe I'm approaching the concept from the wrong direction, i.e., perhaps an AOA device similar to the one in the above site, incorporating a stall warning is more useful. From the users's standpoint, the value of a negative AOA landing approach is, maybe, just as useful. This assumes one is using video. I initially was thinking in terms of my camera inside which takes in part of the instrument panel. If a high powered aircraft, prop or jet, goes vertical, does it stall, or just run out of airspeed? Just based on memory, seems like most of my planes start mushing somewhere around 50 degrees of climb. The telemetry is frankly beyond my ability to figure out! I have no idea how accurate a simple device might be capable of. Looking at the pics of the MAHI device, if you were climbing, with no visible horizon, I guess you could establish a line or reference point on the vertical plane whereat your particular a/c approaches a stall-or I should say, shortly before. Some of this stuff may be less precise than a full size, but heck that's the fun of this, I think!
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