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  1. D

    NIB Geschwender reduction drive

    Is that Geshwender drive still available? I'm interested. Please contact me at [email protected] or call my work: 512-852-9589 Thanks, Dan Nicoson
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    Build a simple radar altimeter

    Back in the late 1980's I enjoyed the fact that we had a real radar altimeter in our A6E's. Of course that was full military funding to ensure it really worked. I'm not sure what a general aviation equivalent would cost, I think in the 1990's I priced them in the sub-$3000 range. One concern...
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    Ultralight Carbon Spar...

    Qaz, I am not familiar with the aircraft you are wanting to modify, however there are several issues you have to consider on a mod like this. 1) Foam will not work to transfer the loads you are considering between the existing aluminum and the graphlite. You would need a proper adhesive...
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    Wing Structure Configuration

    Orion, I appreciate you input on the wing structure. I've been in this design stage a long time and am always learning something! That is one of the benefits of these discussion forums. Any chance you will be at Sun-N-Fun? I'll be there Saturday and Sunday and would like to meet you if...
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    Wing Structure Configuration

    Orion, I have designed around a two-spar wing, the forward spar located about 25% chord (the forward most position of Cp movement for this airfoil), the aft spar is located at 70% chord simply because this allowed room for Fowler flaps and this location starts to give some depth for the spar...
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    Wing Structure Configuration

    Orion, I've cut and pasted your last post to get this string started Dan Dan, to answer your question, you're right, fixing an aft spar would give you a stiffer wing, the question however is whether that is actually what you want. The drawback to this approach can be that you will get...
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    Static Load Testing

    I'll start a new thread Bill, I'm going to start a new thread "Wing Structure Configuration" because I have a few questions. Dan
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    Static Load Testing

    Holden, I commend you for trying to design a safer aircraft to take care of those that encounter ice inadvertantly. I live in Erie, PA and we have serious ice here most of the winter. This year we didn't get much light plane flying in. Concerning the flying slab tail. I know on the...
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    Static Load Testing

    Orion, In my earlier example of Cp shifting aft as airspeed climbs, I was stating that 50% of the load in that high speed condition was being placed on the rear spar of that particular design (partially because of the location of the spars, 25% & 70%), not that Cp reached 50% of chord, Cp did...
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    Ultralight Carbon Spar...

    senna, I don't mean to rebuke, I mean to encourage. Especially the way you have it layed out, it IS a very elegant spar... Dan
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    Ultralight Carbon Spar...

    Senna, What drawing tool are you using to illistrate your spar? That looks cool! As far as this being an "inelegant solution", I think it is far more elegant than going completely back to wood. You've already calculated a huge weight savings and now you give it up for 2-3 pounds of extra...
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    Static Load Testing

    There are several load points that should be considered when designing and testing. These are by no means the only ones. 1) Maneuvering Speed, Va: By deffinition this is the speed at which you can make full throw control inputs and not overstress the aircraft. What this really means is...
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    Ultralight Carbon Spar...

    Don't give up so easily! You are almost there! At the root of your spar where you want to have the fiberglass bolt plates, instead of trying to glue a finished block in place, build up 5-6 thick layers of glass at a time starting a foot or so out from the root end. Let the final thickness...
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    Graphlite™ pultruded carbon fiber rod...

    I've done a load test on two of my spars and have a few recommendations. I had built two spars for my verticle tail with a "C" spar cross section that was then filled with foam and a single face ply of fiberglass across the open side of the C-channel. My spars were about 7 feet long, 6"...
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    Experimental back in aviation!!

    I'm excited about this site, I was thinking about starting a site like this but now I won't have to. Thanks Jake! I have been a long-time EAA member and have seen the organization shift its focus. I'm not bashing EAA, it's the nature of large associations. I'm hoping a web site like this...
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