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About RDavidson

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  • Gender Male
  • Location Pueblo, Colorado

RDavidson's Activity

  1. RDavidson added a topic in Avid Magnum   

    Dynafocal mount types
    I thought I would drop this in a new post...
    dynafocal type one measures 30 degrees at the mount platform on the engine case, it is the most common of the two types...
    dynafocal type two measures 18 degrees at the mount platform on the case, it was developed for the Piper PA-30, from what I read, but is not very common.  I have never put my eyes on one...
    I’m going to go out on a limb and guess that Avid stuck with the Dynafocal Type One for it’s mounts.  Mine was, and three others that I have put my eyes on have been.
    • 0 replies
  2. RDavidson added a post in a topic Some good fun!!!   

    Thanks Chris!
    The downfall of a Bee schemed airplane is an absence of deniability.  Somebody called the cops on me, saying they thought an airplane was having trouble out in the desert.  When I got back to my home Airfield I got the tower asking me to call them!  Everything worked out, but a nice plain white airplane could be a benefit! 
    I don’t even want to think about having two projects hanging over my head!!!  Ha!  Keep plugging away...
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  3. RDavidson added a post in a topic Some good fun!!!   

    Thank you soooo much for the advice.  I finally had an airstrip to myself and did about 10 short field landings and takeoffs using full flaps...man did it work much better.  I’m still working on the landings, getting slower and slower and increasing aoa, but it is something I’m easing into.
    Take offs are improving greatly!  I have been just leaving full flaps in, I will soon incorporate the stick back flap handle up...
    I found that if I push the stick full forward like a normal take off, and push full power in, as the plane speeds up and the tail becomes effective the stick naturally wants to come back to center then I keep pulling back slowly.  This gets the tires off the ground then I push over and use ground effect to accelerate.  I’m getting airborne in 100-200 feet.  I’m no where near max performance, but it is what I feel safe with right now.  I need more practice and of course gas money!  Lol!
    I was using a 2900’ dirt strip.  I had a 5-10 knot direct crosswind.  My last 5 landings/full stop/take off were in the first 1300’ or less.  So much improved!
    I’ll keep working on it though...
    Thanks again for the ideas and advice!
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  4. RDavidson added a post in a topic Kitfox 1 More pics   

    Just looked through this entire post...TJay you have some serious building skills!  Looks fantastic!
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  5. RDavidson added a topic in Avid Flyer General Hangar   

    Flat plates/wingtips/winglets/fences VGs and more
    If you know about wingtips/flat plates/winglets jump in and let us know what you have learned.  We are trying to determine if flat plates on the wingtips would be better than the finch tips or others for STOL not Cruise...
    assumptions are that wing area stays basically the same...so same length of wing.
    Here is a bit of the previous discussion...please jump in...
    Leni,  I am all for tip experiments.  I hope that someone can give some actual measured comparisons of same plane, same pilot, same weight, same winds, and at least two different tips.  Sounds like the Avid (Finch?) tips that turn up at trailing edge do a better job of shedding the vortexes cleanly away from the wings, making them stronger, (what they are designed for), which should help the performance of that plane even though it affects the one behind it.  Maybe they are not the best for formation flying?  EDMO
    Edited 5 hours ago by EDMO
    • 1 reply
  6. RDavidson added a post in a topic Step 2, Build Magnum!!   

    Ed & Leni,
    Im going to move this conversation over to the  Avid General Hangar to get some more input and keep us from polluting Barry’s post any more than we already have...
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  7. RDavidson added a post in a topic Some good fun!!!   

    Thanks Leni!  That is exactly what I was needing...I owe you $5 and a cup of coffee 
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  8. RDavidson added a post in a topic Some good fun!!!   

    Wait, I just re-read that, are you saying increase the AOA?
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  9. RDavidson added a post in a topic Some good fun!!!   

    You are spot on...before the VG install a 3 point Landing was a death wish because of the AOA causing the wingtips to stall right before touch down!  Yikes!!!  Much better now.
    I was using half flaps on this one...I wasn’t really trying for a short takeoff here, I was working my ass off trying to keep it on the Jeep trail without being able to see over the nose!
    What flap setting do you use when going for shortest distance?
    I am just now experimenting with full flap settings...I listened to your advice about testing those settings out after you got the hang of things.
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  10. RDavidson added a post in a topic Some good fun!!!   

    Thanks...Lycoming I-O360, fuel injected, 200hp...The cylinders were too close to the cowling, so I made some extra room.
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  11. RDavidson added a post in a topic Some good fun!!!   

    You aren’t kidding...my main trouble right now is with the brakes, rudder pedals, and my size twelves...I just need to get used to them.  I can easily fly the tail at about 1900rpm, but I start dragging tires at about that same point.  I need to make it out to a gathering at a grass strip and talk techniques with others and then try them out...
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  12. RDavidson added a topic in Avid Magnum   

    Some good fun!!!
    Finally getting to the fun stuff!  Did some Colorado Prairie work today...
    Landing gear is great, but a consideration I did not think of when designing the dimensions, was the benefit of having the tires the same width apart as most trucks!  I'm just a little bit wider, so I'm off the trail on each side, but could be good for deep ruts...
    I can't brag more highly on the functionality of the T3 Tailwheel suspension!!!  It is like riding in a hoopty!  No more chattering your teeth as your tailwheel grabs every bump...smooth as butter.
    I'm still working on everything, it is all new...I landed and then had to taxi forever because I'm not used to landing in such a short distance.  I need some good grass field practice, but everything is dead here...come on Summer!!!
    Blue Skies,
    • 15 replies
  13. RDavidson added a post in a topic Step 2, Build Magnum!!   

    RJG I guess your Magnum needs winglets...
    Best of luck,
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  14. RDavidson added a post in a topic Step 2, Build Magnum!!   

    I said they induce drag!!!  So your argument is because I don’t see them on Boeing and Rutan aircraft that everybody else is doing it for looks?  None of those are STOL aircraft!!!!  The want to travel fast through the air, meaning less drag, meaining they don’t want a fence hanging up in the air 3”.
    I’m just asking that we don’t say that people are just doing it for looks!  There is obviously an advantage in slow flight.
    I don’t know how dusty that book is that you have, but technology changes and everything stol is being revisited.
    I didn’t want to get into this discussion in the first place because the only formal aerodynamics training I have is Air Force and we overcame drag with thrust and cared about flying at 600+ mph.  I didn’t discredit your claim about the finch tips, I just think fences might hold some merit other than decorative ornaments acting as weights on your wing.
    Guys on this forum listen to what you have to say ED, I was one of them when I brought this topic up before building my wing, and I chose finch tips partially because of your theories and partial because I was tired of making mods.  Then I toured Kitfox and saw them experimenting with fences!
    Nobody ever made an advance in technology by listening to “it can’t be done” or “somebody tried that already!”
    Wright Brothers...I rest my case (absurd)
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  15. RDavidson added a post in a topic Step 2, Build Magnum!!   

    we can agree that losing surface area doesn’t help lift...So same size wing, one with the Magnum eye gougers, and one the same length with a flat fence...which one does what?
    I heard the finch tips were to help flow the air off the tips, and project the tumble away from the tips?
    flat plates/fences keep the air from rolling off the side edge and funnel it off the back?
    Both promote lift by keeping airflow stable, and induce a little drag as well...right?
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