RDavidson

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Everything posted by RDavidson

  1. RDavidson added a post in a topic Quiet flying...too quiet...   

    John,
    Thanks for the info and training ideas.  I too would like to hear more on your results and lessons learned.
     
    Thanks,
    Ron
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  2. RDavidson added a post in a topic First flight!!!   

    Thanks guys!  And great advice too!  I flew it again today and had a blast!  Leaving the flapperons positive is the ticket.  I focused on small stick and rudder inputs and she flew great!  I noticed that flying with a ham fist gets you into all kinds of PIO (Pilot Induced Oscillation).  So Leni you were spot on!
    I'll get you guys some numbers soon, sorry I'm having too much fun to do anything serious!
    Thanks again,
    Ron
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  3. RDavidson added a post in a topic DAR appointment   

    Well I got my Airworthiness certificate!  Yeah!
    It was purely a paperwork drill!  I used the packet that the EAA sells and it covered everything.  The only thing that could get you is that one of the forms requires a notary.
    The two Feds bailed on us after making us delay for a month...didn't surprise me...
    We talked a lot about the 51% rule and he told me to expect a little bit of resistance when I go to get my repairman's certificate.  He said that it is hit or miss between someone who understands Experimentals and someone who doesn't and the person that doesn't will be a hard sell.  Whatever, you set up the hoops and  I'll jump through them!
    The DAR was a great guy with a lot of aviation history, but no Experimental background.  He only had me remove the top engine cowl, then he spent about 30 minutes looking things over.  He really didn't find anything, but did ask questions about some of my mods on the plane.  Of course my buddy Jon had warned me to make sure that I had at least 2 threads showing on all of my bolts and that my cotter pins were properly bent.
    The one discrepancy he found was that the certification form was filled out with my last name, first name middle initial, and my data plate had First name, middle initial and last name.  He said the FAA would not accept that if I got ramp checked.
    Overall it was painless and would have taken about 45 minutes, but it was a beautiful day and the DAR was a good guy, so the airport buddies all gathered at the hangar and we BS'd and lied for about 4 hours!  It was a good day.
    If you have any questions, ask me before I flush the info from my memory...that might have already happened
    Ron
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  4. RDavidson added a topic in Avid Magnum   

    First flight!!!
    Wow, I knocked my first two flights out yesterday!  The Super Bee can definitely climb!  I was at pattern altitude halfway down the runway and that was not maxing climb out!
    I had a couple of issues...First is that my Becker radio doesn't have much volume to it and with cockpit noise added I couldn't hear much of anything.  It was so bad that I had to pull the power out anytime I needed to use it.  I think I'm going to use a handheld plugged into my headset for the test phase, then I will dive into the rat's nest of wires behind the dash
    The next issuer was an attention getter!  As soon as I lifted off I could feel that the flapperon she did not like right roll input.  Good thing the pattern was left traffic   I climbed up above the airfield and started testing things, it felt as if I was fighting an Airflow boundary on the right flapperon, but as soon as I pulled in more flap the controls became lighter and I had full control again.  I thought back to what I rigged it for at No Flap setting and I had rigged it at -3 degrees, I had pulled that info from a thread about setting the Magnum for cruise.  I had taken off with No Flaps just to keep things simple at first.  I also had the throttle firewalled for cylinder break in, so I think I had max speed and the negative flap setting causing excessive flapperon force.  I also had discovered after the flight that my -3 degrees on each flapperon had the stick slightly left of center, so when the stick was centered one of the flapperon she was at 0degrees and the other at -6.  If you have adjusted these flight controls before you know that it is only about 1/4" move movement on the stick to make that small of a change.  Another factor was that due to the airframes I have flown over the years, I haven't flown with my left hand in 20 years!  Anyway I solved all of these problems by using the -3 detent on the flaps as a Cruise only setting and then made a 0 -1 degree "No Flap" setting and then three other detente at 5/10/15 degrees.
    I was hitting about 110 mph max with those big ole tires, and it wanted to cruise at about 95-100mph.  I have plenty o' power and the catto 86x40 prop is a beast!  It is all keeping me very busy while flying, the controls are very sensitive and I think my prop is washing out a lot of rudder authority.  The plane likes to wag a bit and I think that is the need to change the horizontal stabilizer angle of attack, but I need to fly more and get used to flying it before making changes.
    My first landing was not to bad.  I had way too much air in the tires and that definitely exaggerated what would have been a tiny bounce.  My second flight was to a smaller field and I struggled to land it there...I went around twice and finally got her down on the third attempt.
    On my long list of things to adjust are the following
    1) set GRT 4000 alarm limits higher to get rid of alarms going off every 30"
    2) get more familiar with using my avionics, I was lost several times in them
    3) rework duct to oil cooler as I was getting some really hot oil temps
    4) Start stall profile to help me adjust to the flight characteristics
    5) Tie right hand behind back to strengthen left hand coordination 
     
    it was a great day, and thank you to all of you on this forum that helped me through building issues.  I couldn't have done it without you!
    videos to come...
     
    Thanks,
    Ron
    • 8 replies
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  5. RDavidson added a post in a topic DAR appointment   

    You are right lostman...I think the DAR might be subject to some kind of FAA oversight, but not this...This was a chance for the FAA to try to understand their own rules!  My buddy had the same thing happen and they spent 2 hours explaining the 51% rule to the FAA guys.  As long as the date doesn't slip again I'm ok with it, but if they try to move the date I'm calling BS and will ask the DAR if he wants $400 or not!
    If this plane is unsafe I kill myself, but that old man that goes and buys the biggest RV on the road is good to go!
    I'll stop there...before the crazy train jumps the tracks
    Ron
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  6. RDavidson added a post in a topic DAR appointment   

    Thanks Paul!  I did exactly what you said, filled out the form and sent a copy to the DAR.  The FAA has now delayed us to the 12th and my DAR actually got fed up and told them to either be there or too bad!  No more changing dates...
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  7. RDavidson added a post in a topic DAR appointment   

    I'll definitely let you guys know how it goes...once I fill out the paperwork I'll try to remember to post it so others can follow my lead.
    ED,
    The 2nd link I posted above is the paperwork you are talking about, I'll post a copy when I'm done...You aren't going to have any problem reaching 51% with your exotic bird!
    Ron
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  8. RDavidson added a post in a topic Attention Magnum Owners!   

    Answering my own post again...I think I have developed a problem
    Well I have identified part of the problem.  The directions said to mount the flapperon horn at 0 to -10 degrees, making sure that they cleared the sides when folded back.  They said -10 was desired.
    I got about -7 to -8 degrees on each flapperon horn...that is screwing me!  When I try to set the flapperon at level (actual -2 to -3 degrees my horns bottom out on the frame instead of the control stops when imputing left and right.  The good news is that I'm still getting 25 degrees down and 20 degrees up.  Then when I move to half flaps I hit the control stick stops...same for full flaps.
    So If I wanted to fix this from the start I would place the flapperon horns somewhere between 0 to -5 degrees.
    Im staying with what I have, if I find I need more aileron when level then I'll come back and fix it, but I think it will be fine.
    Thanks for all of the ideas guys, I tried all of them!
    P.S.  I never want to install another cotter pin!  Between those sticking out and my plethora of zip tie ends, I look like I tried to drown a cat 
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  9. RDavidson added a topic in Avid Flyer General Hangar   

    DAR appointment
    Well I have my DAR inspection setup for April 3rd.  However, when he sent my initial paperwork to the MIDO they came back and said that Avids are not on the "approved kit list" so I will have to prove that I built 51% or more.  To do this the DAR fills out a worksheet that shows the work that was done by the manufacturer and the work that was done by me for each section of the airplane.
    I have no doubt that I can prove 51%, but I was wondering if everybody else had to do this?
    I know there is no common sense when it comes to federal regulations, but you would think this kit would have been approved by now?  Or that the fact that it is basically just like a kitfox might make sense?
    What did you guys experience?
    BTW the FAA is sending two guys to look over the DAR's shoulder...Yipee!  They did this to my buddy Jon too!  What do I care at this point?  I just want to get airborne!
     
    Here is is the location of the Approved Kit list
    https://www.faa.gov/aircraft/gen_av/ultralights/amateur_built/kits/media/amateur_built_kit_listing.pdf
    Here is the checklist to prove 51% that the DAR will use
    https://www.faa.gov/aircraft/gen_av/ultralights/amateur_built/kits/media/AmBuiltFabAssyCklistFW.pdf
     
    Thanks,
    Ron
     
     
    • 18 replies
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  10. RDavidson added a post in a topic Avid Catalina photos   

    Beautiful aircraft!  I bet you are having a blast in that thing!
     
    Ron
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  11. RDavidson added a post in a topic Attention Magnum Owners!   

    Leni,
    Thanks for the info...I pm'd Chris and sent him an email too, but he must be busy.  I know how that goes though, I just got to measuring my engine mount for a guy on the forum a year after he had asked for it!
    It is sometimes hard to write what you are thinking, but hopefully this question will come out right...
    Leni, you said earlier that your flapperons "are at 15 degrees down at full."
    Does this mean your flap handle, when pulled fully, drops the flapperons 15 degrees and then you still have full left and right aileron input?
    Assumption: Normal full aileron input = approx 20 degrees down on the down flapperon.
    So in actual full movement of aileron input both sides would be dropping 15 degrees (flap handle input) plus an additional 20 degrees (approximate aileron down input) on the downward flapperon?  So you would be 35 degrees total deflection on the one flapperon...right?
     
    I did feel a little better when I found a newsletter article that was written by a builder with multiple kit builds under his belt.  He said that he found the Magnum build manual to be of little help and that it lacked the detail of other kit manuals.  This is my first kit build and I was really surprised at how many times I've had to look at pics of other magnums to figure things out because the manual gave me nothing!  If it weren't for you guys I would be lost!
    Thanks,
    Ron
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  12. RDavidson added a post in a topic Attention Magnum Owners!   

    Jim, we thought the same thing, but you can't swap the two.  The pic doesn't show it, but there is another arm on that tube that makes swapping them impossible.
     
    Leni,
    I spent the first part of the day going through all of the old avid newsletters and found an article that basically said what you said in this thread, and that a lot of people weren't using flaps because of the pitch forward and the decrease in aileron control.
    I could not find any numbers for degrees up and down of travel anywhere, other than rudder and elevator.
    I'm taking Leni's advice and Im going with what I have.  With 10 degrees of flap I can still move the stick stop to stop.  Later if I find I need more I will re attack it.
    Thanks for the ideas guys and I'll post any findings.
     
    Ron
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  13. RDavidson added a post in a topic Flaperon mixer   

    Well Leni, I spoke too soon!
    that wasn't the solution either, but I'm on to the right path in this thread

     
     
    Ron
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  14. RDavidson added a post in a topic Attention Magnum Owners!   

    Ok, Barry Cole (New Magnum Kit Owner) helped me troubleshoot this.  We definitely got the controls a lot closer to right.  We found that the two torque tube fittings had welded arms that were pinching the heim bearings...I'll post pics.
    My question now is, how far are the flapperons supposed to deflect?  From the above info the answer is 40 degrees, but my max deflection is 35 degrees before the nose of the flapperon nose hits the flapperon horn...this could be an issue at 15 degrees of flaps.
    What do you guys think?
    You can see the pinch marks at the base of the heim bearing

    Pinched and binding flight controls

    Notched out solved a lot of the problems...

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  15. RDavidson added a post in a topic Attention Magnum Owners!   

    Nothing like me answering my own posts.  This Magnum section is like my personal forum!  LOL!
    I found this post made by Chris B talking about flapperon travel on the Fat Avid and Magnum...very helpful to understanding that the limits are the stick movement limits, not flight control elements binding.
    "Hi Ed, I copied this from a long ago post for my Fat Avid. Is this what you are looking for???
    So I got the controls all working perfectly. New cables, re mounting the flapperon horns and major adjustments did the trick. The control linkage now hard limits at the stick travel limit as it should to avoid stressing any other part of the control mechanism. I get approximately plus and minus 25 degrees of aileron travel stop to stop. I can pull in an additional 15 degrees of flaps, and still have the stick travel hard limited at the stick limits as it should. Full flaps and full aileron deflection provides almost exactly 40 degrees of total down travel. That was a major piece of work to get all figure out, but it is now functioning identical to my MKIV and Magnum.
    Chris"
     
    That makes sense to me now.  I'm headed to the hangar to fix it.  I'm determined to be victorious today!
    Ron
     
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  16. RDavidson added a topic in Avid Magnum   

    Attention Magnum Owners!
    I am still having problems with my flight controls.  I need someone with a Magnum to verify how the flight controls work, specifically the flap handle.
    I wrote down these numbers as the flapperon son went from zero flap handle input upto 15 degrees in 5 degree increments.
    The over all result is a loss of left and right stick control as the flap handle is pulled up.  Is this correct?
    here are the numbers
    -2 degree flaperons (handle down) = 46.5 degrees of total flapperon movement L/R
    +3 degree flaperons (handle @ 5) = 37 degrees of total flapperon movement L/R
    +8 degree flapperon (handle @ 10) = 25.5 degrees of total flapperon movement L/R
    +13 degree flapperon (handle @ 15) = 16 degrees of total flapperon movement L/R
    See, it reduces Left and Right input to 16 degrees of travel!
     
    Any help would be appreciated!
     
    Thanks,
    Ron
    • 10 replies
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  17. RDavidson added a post in a topic We have IGNITION   

    Definitely look me up if you do!
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  18. RDavidson added a post in a topic Flaperon mixer   

    SOLUTION FOUND!!!
    I can't believe I didn't see this sooner!  I feel stupid now...
    the arms in the mixer that connect to the flapperon Rod have a bolt going through them but it is not through the center.  One end is longer than the other and the long end should attach to the flap handle...I had the short end attached!  Glad I figured it out, I though I was going to be flying no flap everywhere!
    Thanks for the help guys, all of your input was appreciated!
    Ron

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  19. RDavidson added a topic in Avid Magnum   

    We have IGNITION
    The Super Bee finally buzzes...
    Well, things finally came together today and the Bee started right up, but a lot of work happened between today and my last post "The start that never happened."
    The problem was a cam gear placed in the wrong position.  I fell for a "fake" timing mark on the cam gear and it put it about a quarter of a turn out of whack.  We removed a valve cover and saw that the exhaust valve was opening before TDC was ever reached.  So lesson learned and consequences served in the form of pulling the engine, removing the exhaust/sump/accessory case.  But the reward was hearing that engine fire up!  Now on to the DAR inspection!


     
    • 3 replies
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  20. RDavidson added a post in a topic Flaperon mixer   

    TJay!  That is genius!  I think that might be the problem at the flap handle...I'll try it out.
    Thanks,
    Ron
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  21. RDavidson added a post in a topic Flaperon mixer   

    Jim,
    I did use the Magnum manual, but it is vague at best.  Worse than that, the pictures don't match the hardware that came with the kit.
    when I leveled my flight surfaces and then determined 5, 10, and 15 degrees of flap extension, the stick left and right motion was restricted at each level so much that at 15 degrees of flaperon the stick only moved an inch or two to each side.
    I tried making longer rods from the flap handle to the bell crank, but that fixed nothing, it just moved the problem further along.
    So, me reading the Kitfox setup is me grasping at straws!  I need to find out some definite answers.
    1) Is the role of the mixer to limit left and right input as the flaps (flaperons) are extended?
    2) How much left and right control input should be available at full flaperon extention (15 degrees)?
     
    Wet!  Hell, I'm a soggy mess trying to figure this one out...
     
    Thanks,
    Ron
     
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  22. RDavidson added a post in a topic Flaperon mixer   

    Well, the new rods bound up the controls just as bad!
    I'm at a loss here!
    I did go back and read through the Kitfox III rigging that LSaupe posted the link to.  It seems like it could help me find the source of the binding.
    I'll give it a whirl...frustrating!!!
     
    Ron
     
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  23. RDavidson added a post in a topic Flaperon mixer   

    Well, the white rods were way too big, so I cut the middle of them out and welded the ends back together.  The new part is 3 1/4 inches from the ends of the threaded portions.  So, with the female bearings on each end I should have some room too adjust them longer.  I'll post a pic if they work
    Oh, this is what was in there originally...I had been looking for that screw!

     
    Ron
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  24. RDavidson added a post in a topic Flaperon mixer   

    Yes, I would love any help from someone with a Magnum!  I might message Chris B.  I hate to bother him, he helped me out before.
    Well, when I inventoried all of the parts I ended up with two powder coated rods, about 6" long with threaded ends.  Also left over were two heim bearing female ends.  After seeing what was in the plane I realized those two rods belong on the flap handle. 
    Here is a pic of what is in the plane now (a replica) it is only about 4" end to end.  It is a bearing with a male all thread and a female bearing.  This is the only real mistake I have found that the original builder made, but a pretty serious one.
    Is this how the Avid Flyer flap handle linkage is set up?

    Here is a pic of the to rods and bearings I had left over. (They will have jam nuts when I put them on the plane)". They will be 7-8" when installed on the flap handle. (They look a tad long to me.)

    Here is what the build manual shows.  The pencil is pointing at the rod on the right. I think theirs was all thread or something similar in size.

     
     
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  25. RDavidson added a post in a topic Flaperon mixer   

    Wow!  After looking at the build manual I discovered that the links between the flap handle and the mixer are completely different from the parts in the pictures.  I don't know what happened exactly, why they are different, but the result is that they are about half the length as the plans show.  That is why I'm struggling with the flap settings.  Im going to sort through my extra parts box   I will also post some pics tomorrow.
     
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