Activity Stream

Activity Stream



  1. Luked added a post in a topic Just joined the Fat Avid Club   

    Hey Chris, I'm about 10 minutes from heading out the door to Oshkosh. I'll post some pics first of the week when I get back though.
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  2. Guest added a post in a topic Just joined the Fat Avid Club   

    I would love to see some pictures. Please post some! Oregon is close. Maybe I can make something work.
     
    Thank you!
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  3. akflyer added a post in a topic Axle size   

    I have bent a few sets, but that is probable due to the tires I run and the places I go.  If your landing grass or pavement or dirt strips I dont see you having any issues with the 3/4" axles (heavy wall 4130 tubing).  The solid axles didnt last as long as a popcorn fart in a whirl wind... If / When I ever rebuild or make new gear, I will probably go with 1 1/4" or 1 1/2" axles so I can grab a tire off damn near any cub guy in the area in the event that I break a wheel or something and need to borrow one in a pinch at some remote location. 
     

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  4. EDMO added a post in a topic Small project update   

    Luke,
         I was referring to the tubes at the top of the cabin, commonly called "headache bars" - I took the photo, but will have to wait for my daughter to get home to post it - my old brain just cant remember how to do that.
         I put a slight upward bend in mine to match the wing profile - figuring that in case of a rollover or crunch, the tubes would bend up away from my head instead of down.  Some have these tubes in a double-"Y" shape and connect to all 4 corners - mine are larger tubes and go from about center of windshield in two places to the top corners of the rear spar tube.  There may be better ways to make them?  Might be good to think about having to crawl out the top?
         Don't be confused by my photo - I raised my roof and wings 6 inches.
         I will just add the photo to this post later today.
    EDMO

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  5. EDMO added a post in a topic Axle size   

    The 3/4 axles that I have are solid bars - I think some were tubing originally - seems like Leni went from tubing to solid or thicker after bending his.
    I agree with Jim - when things get that rough, something is going to bend - You just have to decide where you want the bend to be -
    I would rather replace an axle than a gear, or a longeron, as so many have done.
    EDMO
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  6. Luked added a post in a topic Just joined the Fat Avid Club   

    Hey Chris. I don't know much about Avid cowlings, but my MK-IV came with a cowl that I am not going to use. I really want to make my own. My understanding is that the cowl is for the O-200 that the original builder planned to install. If the MK-IV bottom cowl will work, it might be of some use to you.
     
    I think it's been through several project moves, and it looks a little discolored (yellowish). I can take some pictures next week if you are interested (I'm getting ready to leave for Oshkosh). You're welcome to it if you want to pick it up. Seems like you said you are from Washington, so if you ever make it down this way, I'm right on I-5.
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  7. Guest added a post in a topic Just joined the Fat Avid Club   

    Not a lot of activity right now so I will ask of all the fat avid owners the story behind your cowl. Did both halves come from the factory ready made? Did you have to modify your existing (MKIV or other) cowl? Did you use a cowl from another plane (kitfox or other)?
     
    Brett says he has a mold for a fat avid cowl top. (Thanks for getting back to me Brett!) But he also says he is not aware there ever was a unique bottom and that the MKIV cowl bottom is what is used. is that true?
     
    I am now stuck on the cowl in my Fat Avid project since landing gear is now complete.
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  8. 1avidflyer added a post in a topic Axle size   

    I did once, but I tore the gear off at the same time.  It only slightly bent the axel and I straightened it back out.   I would stick with the 3/4" if it was me.  Just my 2 cents worth...  Jim Chuk
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  9. Goldendale-flyer added a topic in Avidfoxflyers General Hangar   

    Axle size
    I just bought an Avid MKIV HH with an Airdale stretch. It came with a nose wheel and main landing gear. I am having Brett at Airdale build a bush landing gear. The question is has anyone bent a 3/4" axle? I had a J-3 cub and it had 1-1/4" axles. Should I stick with the 3/4" size? I don't want to buy new wheels or brakes. Has anyone actualy seen a bent 3/4" axle?
     
    Thanks,
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  10. Luked added a post in a topic Small project update   

    Hi Ed,
     
    I'm not sure I understand which tubes you mean. maybe you could show a picture. The solid model in the picture is mostly just my starting point. It is exactly as the fuselage came from the Avid factory. Except for the following changes:
     
    - Tail was stretched 16 inches by previous owner (this is pretty easy to spot in the picture).
    - Some tubes in the floor and firewall area are not shown because I just haven't added them yet, or because they have been removed on the real plane.
    - The landing gear / seat truss is my new design.
     
    I'm going to be adding some new tubes in the front area to make up for some of the nose wheel structure I removed.
     
    One nice thing about solid modeling this think is that the software calculates the weight of everything for you. It will also tall you the center of gravity. The weight is still pretty meaningless at this point though because I have a lot more to add.
     
    One more edit: There are two tubes I still need to add right under the rear spare carry through. These will change the picture a little in that area 
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  11. EDMO added a post in a topic Small project update   

    Luke,
         After just a quick glance at your drawing, I think you need to move the rear of your overhead tubes to the outside corners of the rear spar crossover tube - going to the center gives no rigidity.   I can post a photo of mine if you want - but not saying mine is the only way to make them.
         With all your calculations, have you guestimated the bare fuselage weight?
    EDMO
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  12. Luked added a post in a topic Small project update   

    I think there are some actual engineers on the forum aren't there? It seems like I remember some members mentioning it. It would be nice to get some input from them as well. I've documented all of my calculations pretty clearly, so others could review them.
     
    My brother is a professional engineer, and he has reviewed them with me (pointed out a couple of mistakes). We both know there are some assumptions made to simplify things a little, but otherwise, the results seem pretty useful.
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  13. akflyer added a post in a topic Small project update   

    I do believe the original designer was self taught.... and he has made some amazing designs.   Maybe when the guys get back from OSH they can post up some numbers for you to play with and see what you come up with. 
     

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  14. Luked added a post in a topic Small project update   

    Hey Leni,
     
    This is actually for a bungee style gear, so the geometry of the tubes is different. The main part that I re-designed though is the truss that the bungees wrap around.
     
    It shouldn't be hard to do a truss analysis for a "bush gear style" though. If someone had some dimensions of their gear, I can see what I can come up with. There are some limitations to doing very simple truss analysis (joints method), but it can be pretty useful if you understand those limitations.
     
    Just to be clear, I'm not an engineer, but I took 2 years of engineering about 20 years ago before I went a different direction (long story). beyond what I learned in school, I'm self taught.
     
    Luke D.
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  15. akflyer added a post in a topic Small project update   

    Damn!  Kind of impressive to see someone actually doing some real engineering when making changes!  Will be interesting to see what you come up with for stresses on the cabane vee.  The one from Airdale has the cabane vee pulling in a straight line across the center, but I am certain that if you drop that centerline down (like Piper did on the cubs) then it will put much less stress on the seat truss and the gear attach points. 
     

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  16. Luked added a topic in Avidfoxflyers General Hangar   

    Small project update
    Well, things seem pretty quiet around here, so I thought I would show a little of what I've been working on. I finally got back to work on the Avid. Now that all of the stress calculations are done (mostly) for the new landing gear/seat truss, I wanted to see how it would fit with everything else on the plane.
     
    I made up a solid model of the fuselage. I'm also planning some other changes, and want to make sure all of the changes work together. Once I have all of the changes modeled, I'll be ready to order some tubing, and start cutting and welding
     
    Here is what I have so far.
     

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  17. EDMO added a post in a topic Hey Leni   

    Is any commercial source making the conversions or redrives for the 800?  Exhausts for planes?
    EDMO
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  18. Cropduster13 added a post in a topic Hey Leni   

    My friend  Skeeter is putting one in his mosquito, here in El Paso TX. hope it works better than the POS. MZ he had.
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  19. akflyer added a post in a topic Hey Leni   

    Sweet! I knew it would work!


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  20. Av8r3400 added a topic in Rotax and other engines   

    Hey Leni
    800 AC motor in a heli...


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  21. birddog486 added a post in a topic Highwing Cabane gear for sale   

    Measurements would be great. I've always thought they were interchangable but just saw a kitfox III a couple weeks ago and the gear mounts looked alot different than my Avid.
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  22. C5Engineer added a post in a topic Pic request MK4 elevator with electric trim   

    Thanks everyone!
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  23. High Country added a post in a topic Highwing Cabane gear for sale   

    Yes. on the gear legs up through the MK IV's not sure what KF had after that.
     
    No- on the cabane the widths are different 
     
    I had an avid gear, switched to a KF gear and now have a modified Ridge Runner gear. the fore and aft mounting locations are the same. might be off by just a smidge but it only took slight filing and all dropped into place on all three gears onto my avid airframe.
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  24. Xengineguy added a post in a topic Highwing Cabane gear for sale   

    Ed the outside measurement is. 85". From the ground to the planes underbelly is. 31". This is with 21 x12x8. Tires
    Bird dog I don't know if the avid is the same. If you want I. Could post some measurements.
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  25. birddog486 added a post in a topic Highwing Cabane gear for sale   

    does this Kitfox gear have the same mounting locations as the Avid?
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